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49 results on '"Otero S"'

1. Prevalencia del Trastorno por Estrés Postraumático TEPT y eventos asociados en víctimas del desplazamiento forzado en la ciudad de Montería

Author

Cabas Hoyos, Kattia, Villamil Benítez, Ilse, Uribe Urzola, Alicia, Otero S., Carmen Rosa, González Bracamonte, Yaninis, Cabas Hoyos, Kattia, Villamil Benítez, Ilse, Uribe Urzola, Alicia, Otero S., Carmen Rosa, and González Bracamonte, Yaninis

Abstract

Forced displacement in Montería can become a risk factor for the existence of Post-Traumatic Stress Disorder (PTSD); however, there are no data on its prevalence. The objective of the research was to identify the prevalence of PTSD and associated events in adults who suffered displacement and are resettled in this city. 117 adults (n = 72 women; n = 45 men) who were victims of displacement participated. To evaluate the events associated with trauma, the Clinician Administered PTSD Scale CAPS and the PTSD Checklist PCL-C were used. Events occurred and witnessed by individuals were analyzed. The results showed that 26.49% of the sample met clinical criteria for PTSD. The results are consistent with the existing literature and establish a point of reference for future studies, as well as for the planning of projects and interventions focused on the mental health of this population., O deslocamento forçado em Montería pode se tornar um fator de risco para a existência do Transtorno de Estresse Pós-Traumático (TEPT), porém, não há dados sobre sua prevalência. O objetivo da pesquisa foi identificar a prevalência de TEPT e eventos associados em adultos que sofreram deslocamento esão reassentados nesta cidade. Participaram 117 adultos (n = 72 mulheres; n = 45 homens) vítimas de deslocamento. Para avaliar os eventos associados ao trauma, foram utilizados o Clinician Administered PTSD Scale CAPS e o PTSD Checklist PCL-C. Os eventos ocorridos e testemunhados por indivíduos foram analisados. Os resultados mostraram que o 26,49% da amostra preencheu os critérios clínicos para TEPT. Os resultados são consistentes com a literatura existente e estabelecem uma referência para estudos futuros, bem como para o planejamento de projetos e intervenções voltadas para a saúde mental dessa população., El desplazamiento forzoso en Montería puede convertirse en un factor de riesgo para la existencia de Trastorno por Estrés Postraumático (TEPT), sin embargo, no existen datos de prevalencia del mismo. El objetivo de la investigación fue identificar la prevalencia del TEPT y eventos asociados en adultosque sufrieron desplazamiento y están reasentados en esta ciudad. Participaron 117 adultos (n = 72 mujeres; n = 45 hombres) víctimas del desplazamiento. Para evaluar los eventos asociados al trauma fue empleada la Clinician Administred PTSD Scale CAPS y el PTSD Checklist PCL-C. Se analizaron eventos ocurridos y presenciados por los individuos. Los resultados mostraron que el 26.49% de la muestra cumplió criterios clínicos de TEPT. Los resultados son consistentes con la literatura existente y establecen un punto de referencia para futuros estudios, así como para el planeamiento de proyectos e intervenciones focalizados en la salud mental de esta población.

Published
2022

2. V1294 Aql = HD 184279: A bad boy among Be stars or an important clue to the Be phenomenon?

Author

Harmanec, P., Božić, H., Koubský, P., Yang, S., Ruždjak, D., Sudar, D., Šlechta, M., Wolf, M., Korčáková, D., Zasche, P., Oplištilová, A., Vršnak, D., Ak, H., Eenens, P., Bakiş, H., Bakiş, V., Otero, S., Chini, R., Demsky, T., Barlow, B. N., Svoboda, P., Jonák, J., Vitovský, K., Harmanec, A., Harmanec, P., Božić, H., Koubský, P., Yang, S., Ruždjak, D., Sudar, D., Šlechta, M., Wolf, M., Korčáková, D., Zasche, P., Oplištilová, A., Vršnak, D., Ak, H., Eenens, P., Bakiş, H., Bakiş, V., Otero, S., Chini, R., Demsky, T., Barlow, B. N., Svoboda, P., Jonák, J., Vitovský, K., and Harmanec, A.

Abstract

A reliable determination of the basic physical properties and variability patterns of hot emission-line stars is important for understanding the Be phenomenon and ultimately, the evolutionary stage of Be stars. This study is devoted to one of the most remarkable Be stars, V1294 Aql = HD 184279. We collected and analysed spectroscopic and photometric observations covering a time interval of about 25000 d (68 yr). We present evidence that the object is a single-line 192.9 d spectroscopic binary and estimate that the secondary probably is a hot compact object with a mass of about 1.1-1.2 solar masses. We found and documented very complicated orbital and long-term spectral, light, and colour variations, which must arise from a combination of several distinct variability patterns. Attempts at modelling them are planned for a follow-up study. We place the time behaviour of V1294 Aql into context with variations known for some other systematically studied Be stars and discuss the current ideas about the nature of the Be phenomenon., Comment: 15 pages, 15 figures, accepted for publication in Astronomy and Astrophysics

Published
2022
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3. Boromycin has Rapid-Onset Antibiotic Activity Against Asexual and Sexual Blood Stages of Plasmodium falciparum

Author

Carvalho, L.P. de, Groeger-Otero, S., Kreidenweiss, A., Kremsner, P.G., Mordmüller, B., Held, J., Carvalho, L.P. de, Groeger-Otero, S., Kreidenweiss, A., Kremsner, P.G., Mordmüller, B., and Held, J.

Abstract

Item does not contain fulltext, Boromycin is a boron-containing macrolide antibiotic produced by Streptomyces antibioticus with potent activity against certain viruses, Gram-positive bacteria and protozoan parasites. Most antimalarial antibiotics affect plasmodial organelles of prokaryotic origin and have a relatively slow onset of action. They are used for malaria prophylaxis and for the treatment of malaria when combined to a fast-acting drug. Despite the success of artemisinin combination therapies, the current gold standard treatment, new alternatives are constantly needed due to the ability of malaria parasites to become resistant to almost all drugs that are in heavy clinical use. In vitro antiplasmodial activity screens of tetracyclines (omadacycline, sarecycline, methacycline, demeclocycline, lymecycline, meclocycline), macrolides (oleandomycin, boromycin, josamycin, troleandomycin), and control drugs (chloroquine, clindamycin, doxycycline, minocycline, eravacycline) revealed boromycin as highly potent against Plasmodium falciparum and the zoonotic Plasmodium knowlesi. In contrast to tetracyclines, boromycin rapidly killed asexual stages of both Plasmodium species already at low concentrations (~ 1 nM) including multidrug resistant P. falciparum strains (Dd2, K1, 7G8). In addition, boromycin was active against P. falciparum stage V gametocytes at a low nanomolar range (IC(50): 8.5 ± 3.6 nM). Assessment of the mode of action excluded the apicoplast as the main target. Although there was an ionophoric activity on potassium channels, the effect was too low to explain the drug´s antiplasmodial activity. Boromycin is a promising antimalarial candidate with activity against multiple life cycle stages of the parasite.

Published
2021

4. Boromycin has Rapid-Onset Antibiotic Activity Against Asexual and Sexual Blood Stages of Plasmodium falciparum

Author

Carvalho, L.P. de, Groeger-Otero, S., Kreidenweiss, A., Kremsner, P.G., Mordmüller, B., Held, J., Carvalho, L.P. de, Groeger-Otero, S., Kreidenweiss, A., Kremsner, P.G., Mordmüller, B., and Held, J.

Abstract

Contains fulltext : 248681.pdf (Publisher’s version ) (Open Access), Boromycin is a boron-containing macrolide antibiotic produced by Streptomyces antibioticus with potent activity against certain viruses, Gram-positive bacteria and protozoan parasites. Most antimalarial antibiotics affect plasmodial organelles of prokaryotic origin and have a relatively slow onset of action. They are used for malaria prophylaxis and for the treatment of malaria when combined to a fast-acting drug. Despite the success of artemisinin combination therapies, the current gold standard treatment, new alternatives are constantly needed due to the ability of malaria parasites to become resistant to almost all drugs that are in heavy clinical use. In vitro antiplasmodial activity screens of tetracyclines (omadacycline, sarecycline, methacycline, demeclocycline, lymecycline, meclocycline), macrolides (oleandomycin, boromycin, josamycin, troleandomycin), and control drugs (chloroquine, clindamycin, doxycycline, minocycline, eravacycline) revealed boromycin as highly potent against Plasmodium falciparum and the zoonotic Plasmodium knowlesi. In contrast to tetracyclines, boromycin rapidly killed asexual stages of both Plasmodium species already at low concentrations (~ 1 nM) including multidrug resistant P. falciparum strains (Dd2, K1, 7G8). In addition, boromycin was active against P. falciparum stage V gametocytes at a low nanomolar range (IC(50): 8.5 ± 3.6 nM). Assessment of the mode of action excluded the apicoplast as the main target. Although there was an ionophoric activity on potassium channels, the effect was too low to explain the drug´s antiplasmodial activity. Boromycin is a promising antimalarial candidate with activity against multiple life cycle stages of the parasite.

Published
2021

5. Boromycin has Rapid-Onset Antibiotic Activity Against Asexual and Sexual Blood Stages of Plasmodium falciparum

Author

Carvalho, L.P. de, Groeger-Otero, S., Kreidenweiss, A., Kremsner, P.G., Mordmüller, B., Held, J., Carvalho, L.P. de, Groeger-Otero, S., Kreidenweiss, A., Kremsner, P.G., Mordmüller, B., and Held, J.

Abstract

Contains fulltext : 248681.pdf (Publisher’s version ) (Open Access), Boromycin is a boron-containing macrolide antibiotic produced by Streptomyces antibioticus with potent activity against certain viruses, Gram-positive bacteria and protozoan parasites. Most antimalarial antibiotics affect plasmodial organelles of prokaryotic origin and have a relatively slow onset of action. They are used for malaria prophylaxis and for the treatment of malaria when combined to a fast-acting drug. Despite the success of artemisinin combination therapies, the current gold standard treatment, new alternatives are constantly needed due to the ability of malaria parasites to become resistant to almost all drugs that are in heavy clinical use. In vitro antiplasmodial activity screens of tetracyclines (omadacycline, sarecycline, methacycline, demeclocycline, lymecycline, meclocycline), macrolides (oleandomycin, boromycin, josamycin, troleandomycin), and control drugs (chloroquine, clindamycin, doxycycline, minocycline, eravacycline) revealed boromycin as highly potent against Plasmodium falciparum and the zoonotic Plasmodium knowlesi. In contrast to tetracyclines, boromycin rapidly killed asexual stages of both Plasmodium species already at low concentrations (~ 1 nM) including multidrug resistant P. falciparum strains (Dd2, K1, 7G8). In addition, boromycin was active against P. falciparum stage V gametocytes at a low nanomolar range (IC(50): 8.5 ± 3.6 nM). Assessment of the mode of action excluded the apicoplast as the main target. Although there was an ionophoric activity on potassium channels, the effect was too low to explain the drug´s antiplasmodial activity. Boromycin is a promising antimalarial candidate with activity against multiple life cycle stages of the parasite.

Published
2021

6. The ASAS-SN Catalog of Variable Stars IX: The Spectroscopic Properties of Galactic Variable Stars

Author

Jayasinghe, T., Kochanek, C. S., Stanek, K. Z., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Pojmanski, G., Otero, S., Hurst, N., Will, D., Jayasinghe, T., Kochanek, C. S., Stanek, K. Z., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Pojmanski, G., Otero, S., Hurst, N., and Will, D.

Abstract

The All-Sky Automated Survey for Supernovae (ASAS-SN) provides long baseline (${\sim}4$ yrs) $V-$band light curves for sources brighter than V$\lesssim17$ mag across the whole sky. We produced V-band light curves for a total of ${\sim}61.5$ million sources and systematically searched these sources for variability. We identified ${\sim} 426,000$ variables, including ${\sim} 219,000$ new discoveries. Most (${\sim}74\%$) of our discoveries are in the Southern hemisphere. Here we use spectroscopic information from LAMOST, GALAH, RAVE, and APOGEE to study the physical and chemical properties of these variables. We find that metal-poor eclipsing binaries have orbital periods that are shorter than metal-rich systems at fixed temperature. We identified rotational variables on the main-sequence, red giant branch and the red clump. A substantial fraction (${\gtrsim}80\%$) of the rotating giants have large $v_{\rm rot}$ or large NUV excesses also indicative of fast rotation. The rotational variables have unusual abundances suggestive of analysis problems. Semi-regular variables tend to be lower metallicity ($\rm [Fe/H]{\sim}-0.5$) than most giant stars. We find that the APOGEE DR16 temperatures of oxygen-rich semi-regular variables are strongly correlated with the $W_{RP}-W_{JK}$ color index for $\rm T_{eff}\lesssim3800$ K. Using abundance measurements from APOGEE DR16, we find evidence for Mg and N enrichment in the semi-regular variables. We find that the Aluminum abundances of the semi-regular variables are strongly correlated with the pulsation period, where the variables with $\rm P\gtrsim 60$ days are significantly depleted in Al., Comment: 44 pages, 33 figures. Accepted for publication in MNRAS

Published
2020
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7. The ASAS-SN Catalog of Variable Stars IX: The Spectroscopic Properties of Galactic Variable Stars

Author

Jayasinghe, T., Kochanek, C. S., Stanek, K. Z., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Pojmanski, G., Otero, S., Hurst, N., Will, D., Jayasinghe, T., Kochanek, C. S., Stanek, K. Z., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Pojmanski, G., Otero, S., Hurst, N., and Will, D.

Abstract

The All-Sky Automated Survey for Supernovae (ASAS-SN) provides long baseline (${\sim}4$ yrs) $V-$band light curves for sources brighter than V$\lesssim17$ mag across the whole sky. We produced V-band light curves for a total of ${\sim}61.5$ million sources and systematically searched these sources for variability. We identified ${\sim} 426,000$ variables, including ${\sim} 219,000$ new discoveries. Most (${\sim}74\%$) of our discoveries are in the Southern hemisphere. Here we use spectroscopic information from LAMOST, GALAH, RAVE, and APOGEE to study the physical and chemical properties of these variables. We find that metal-poor eclipsing binaries have orbital periods that are shorter than metal-rich systems at fixed temperature. We identified rotational variables on the main-sequence, red giant branch and the red clump. A substantial fraction (${\gtrsim}80\%$) of the rotating giants have large $v_{\rm rot}$ or large NUV excesses also indicative of fast rotation. The rotational variables have unusual abundances suggestive of analysis problems. Semi-regular variables tend to be lower metallicity ($\rm [Fe/H]{\sim}-0.5$) than most giant stars. We find that the APOGEE DR16 temperatures of oxygen-rich semi-regular variables are strongly correlated with the $W_{RP}-W_{JK}$ color index for $\rm T_{eff}\lesssim3800$ K. Using abundance measurements from APOGEE DR16, we find evidence for Mg and N enrichment in the semi-regular variables. We find that the Aluminum abundances of the semi-regular variables are strongly correlated with the pulsation period, where the variables with $\rm P\gtrsim 60$ days are significantly depleted in Al., Comment: 44 pages, 33 figures. Accepted for publication in MNRAS

Published
2020
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8. The ASAS-SN Catalog of Variable Stars VI: An All-Sky Sample of $\delta$ Scuti Stars

Author

Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Vallely, P. J., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Pejcha, O., Fausnaugh, M., Otero, S., Hurst, N., Will, D., Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Vallely, P. J., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Pejcha, O., Fausnaugh, M., Otero, S., Hurst, N., and Will, D.

Abstract

We characterize an all-sky catalog of ${\sim} 8,400$ $\delta$ Scuti variables in ASAS-SN, which includes ${\sim} 3,300$ new discoveries. Using distances from \textit{Gaia} DR2, we derive period-luminosity relationships (PLRs) for both the fundamental mode and overtone pulsators in the $W_{JK}$, $V$, Gaia DR2 $G$, $J$, $H$, $K_s$ and $W_1$ bands. We find that the overtone pulsators have a dominant overtone mode, with many sources pulsating in the second overtone or higher order modes. The fundamental mode pulsators have metallicity dependent periods, with $\log_{10} (\rm P){\sim}-1.1$ for $\rm [Fe/H]<-0.3$ and $\log_{10} (\rm P){\sim}-0.9$ for $\rm [Fe/H]>0$ which leads to a period-dependant scale height. Stars with $\rm P>0.100\,d$ are predominantly located close to the Galactic disk ($\rm |Z|<0.5\,kpc$). The median period at a scale height of $\rm Z{\sim}0\, kpc$ also increases with the Galactocentric radius $\rm R$, from $\log_{10} (\rm P){\sim}-0.94$ for sources with $\rm R>9\, kpc$ to $\log_{10} (\rm P){\sim}-0.85$ for sources with $\rm R<7\, kpc$, which is indicative of a radial metallicity gradient. To illustrate potential applications of this all-sky catalog, we obtained 30 min cadence, image subtraction TESS light curves for a sample of 10 fundamental mode and 10 overtone $\delta$ Scuti stars discovered by ASAS-SN. From this sample, we identified two new $\delta$ Scuti eclipsing binaries, ASASSN-V J071855.62$-$434247.3 and ASASSN-V J170344.20$-$615941.2 with short orbital periods of $\rm P_{orb}=2.6096$ d and $\rm P_{orb}=2.5347$ d respectively., Comment: Accepted by MNRAS

Published
2019
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9. The ASAS-SN Catalog of Variable Stars VII: Contact Binaries are Different Above and Below the Kraft Break

Author

Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Pinsonneault, M. H., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Pawlak, M., Pejcha, O., Pojmanski, G., Otero, S., Hurst, N., Will, D., Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Pinsonneault, M. H., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Pawlak, M., Pejcha, O., Pojmanski, G., Otero, S., Hurst, N., and Will, D.

Abstract

We characterize ${\sim} 71,200$ W UMa type (EW) contact binaries, including ${\sim} 12,600$ new discoveries, using ASAS-SN $V$-band all-sky light curves along with archival data from Gaia, 2MASS, AllWISE, LAMOST, GALAH, RAVE, and APOGEE. There is a clean break in the EW period-luminosity relation at $\rm \log (\rm P/d){\simeq}-0.30$, separating the longer period early-type EW binaries from the shorter period, late-type systems. The two populations are even more cleanly separated in the space of period and effective temperature, by $\rm T_{eff}=6710\,K-1760\,K\,\log(P/0.5\,d)$. Early-type and late-type EW binaries follow opposite trends in $\rm T_{eff}$ with orbital period. For longer periods, early-type EW binaries are cooler, while late-type systems are hotter. We derive period-luminosity relationships (PLRs) in the $W_{JK}$, $V$, Gaia DR2 $G$, $J$, $H$, $K_s$ and $W_1$ bands for the late-type and early-type EW binaries separated both by period and effective temperature, and by period alone. The dichotomy of contact binaries is almost certainly related to the Kraft break and the related changes in envelope structure, winds and angular momentum loss., Comment: Accepted by MNRAS

Published
2019
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10. The ASAS-SN Catalog of Variable Stars V: Variables in the Southern Hemisphere

Author

Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Shields, J. V., Pojmanski, G., Otero, S., Hurst, N., Britt, C. A., Will, D., Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Shields, J. V., Pojmanski, G., Otero, S., Hurst, N., Britt, C. A., and Will, D.

Abstract

The All-Sky Automated Survey for Supernovae (ASAS-SN) provides long baseline (${\sim}4$ yrs) light curves for sources brighter than V$\lesssim17$ mag across the whole sky. As part of our effort to characterize the variability of all the stellar sources visible in ASAS-SN, we have produced ${\sim}30.1$ million V-band light curves for sources in the southern hemisphere using the APASS DR9 catalog as our input source list. We have systematically searched these sources for variability using a pipeline based on random forest classifiers. We have identified ${\sim} 220,000$ variables, including ${\sim} 88,300$ new discoveries. In particular, we have discovered ${\sim}48,000$ red pulsating variables, ${\sim}23,000$ eclipsing binaries, ${\sim}2,200$ $\delta$-Scuti variables and ${\sim}10,200$ rotational variables. The light curves and characteristics of the variables are all available through the ASAS-SN variable stars database (https://asas-sn.osu.edu/variables). The pre-computed ASAS-SN V-band light curves for all the ${\sim}30.1$ million sources are available through the ASAS-SN photometry database (https://asas-sn.osu.edu/photometry). This effort will be extended to provide ASAS-SN light curves for sources in the northern hemisphere and for V$\lesssim17$ mag sources across the whole sky that are not included in APASS DR9., Comment: 17 pages, 14 figures. Accepted by MNRAS

Published
2019
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11. The ASAS-SN Catalog of Variable Stars VII: Contact Binaries are Different Above and Below the Kraft Break

Author

Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Pinsonneault, M. H., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Pawlak, M., Pejcha, O., Pojmanski, G., Otero, S., Hurst, N., Will, D., Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Pinsonneault, M. H., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Pawlak, M., Pejcha, O., Pojmanski, G., Otero, S., Hurst, N., and Will, D.

Abstract

We characterize ${\sim} 71,200$ W UMa type (EW) contact binaries, including ${\sim} 12,600$ new discoveries, using ASAS-SN $V$-band all-sky light curves along with archival data from Gaia, 2MASS, AllWISE, LAMOST, GALAH, RAVE, and APOGEE. There is a clean break in the EW period-luminosity relation at $\rm \log (\rm P/d){\simeq}-0.30$, separating the longer period early-type EW binaries from the shorter period, late-type systems. The two populations are even more cleanly separated in the space of period and effective temperature, by $\rm T_{eff}=6710\,K-1760\,K\,\log(P/0.5\,d)$. Early-type and late-type EW binaries follow opposite trends in $\rm T_{eff}$ with orbital period. For longer periods, early-type EW binaries are cooler, while late-type systems are hotter. We derive period-luminosity relationships (PLRs) in the $W_{JK}$, $V$, Gaia DR2 $G$, $J$, $H$, $K_s$ and $W_1$ bands for the late-type and early-type EW binaries separated both by period and effective temperature, and by period alone. The dichotomy of contact binaries is almost certainly related to the Kraft break and the related changes in envelope structure, winds and angular momentum loss., Comment: Accepted by MNRAS

Published
2019
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12. The ASAS-SN Catalog of Variable Stars VI: An All-Sky Sample of $\delta$ Scuti Stars

Author

Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Vallely, P. J., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Pejcha, O., Fausnaugh, M., Otero, S., Hurst, N., Will, D., Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Vallely, P. J., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Pejcha, O., Fausnaugh, M., Otero, S., Hurst, N., and Will, D.

Abstract

We characterize an all-sky catalog of ${\sim} 8,400$ $\delta$ Scuti variables in ASAS-SN, which includes ${\sim} 3,300$ new discoveries. Using distances from \textit{Gaia} DR2, we derive period-luminosity relationships (PLRs) for both the fundamental mode and overtone pulsators in the $W_{JK}$, $V$, Gaia DR2 $G$, $J$, $H$, $K_s$ and $W_1$ bands. We find that the overtone pulsators have a dominant overtone mode, with many sources pulsating in the second overtone or higher order modes. The fundamental mode pulsators have metallicity dependent periods, with $\log_{10} (\rm P){\sim}-1.1$ for $\rm [Fe/H]<-0.3$ and $\log_{10} (\rm P){\sim}-0.9$ for $\rm [Fe/H]>0$ which leads to a period-dependant scale height. Stars with $\rm P>0.100\,d$ are predominantly located close to the Galactic disk ($\rm |Z|<0.5\,kpc$). The median period at a scale height of $\rm Z{\sim}0\, kpc$ also increases with the Galactocentric radius $\rm R$, from $\log_{10} (\rm P){\sim}-0.94$ for sources with $\rm R>9\, kpc$ to $\log_{10} (\rm P){\sim}-0.85$ for sources with $\rm R<7\, kpc$, which is indicative of a radial metallicity gradient. To illustrate potential applications of this all-sky catalog, we obtained 30 min cadence, image subtraction TESS light curves for a sample of 10 fundamental mode and 10 overtone $\delta$ Scuti stars discovered by ASAS-SN. From this sample, we identified two new $\delta$ Scuti eclipsing binaries, ASASSN-V J071855.62$-$434247.3 and ASASSN-V J170344.20$-$615941.2 with short orbital periods of $\rm P_{orb}=2.6096$ d and $\rm P_{orb}=2.5347$ d respectively., Comment: Accepted by MNRAS

Published
2019
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13. The ASAS-SN Catalog of Variable Stars V: Variables in the Southern Hemisphere

Author

Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Shields, J. V., Pojmanski, G., Otero, S., Hurst, N., Britt, C. A., Will, D., Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Shields, J. V., Pojmanski, G., Otero, S., Hurst, N., Britt, C. A., and Will, D.

Abstract

The All-Sky Automated Survey for Supernovae (ASAS-SN) provides long baseline (${\sim}4$ yrs) light curves for sources brighter than V$\lesssim17$ mag across the whole sky. As part of our effort to characterize the variability of all the stellar sources visible in ASAS-SN, we have produced ${\sim}30.1$ million V-band light curves for sources in the southern hemisphere using the APASS DR9 catalog as our input source list. We have systematically searched these sources for variability using a pipeline based on random forest classifiers. We have identified ${\sim} 220,000$ variables, including ${\sim} 88,300$ new discoveries. In particular, we have discovered ${\sim}48,000$ red pulsating variables, ${\sim}23,000$ eclipsing binaries, ${\sim}2,200$ $\delta$-Scuti variables and ${\sim}10,200$ rotational variables. The light curves and characteristics of the variables are all available through the ASAS-SN variable stars database (https://asas-sn.osu.edu/variables). The pre-computed ASAS-SN V-band light curves for all the ${\sim}30.1$ million sources are available through the ASAS-SN photometry database (https://asas-sn.osu.edu/photometry). This effort will be extended to provide ASAS-SN light curves for sources in the northern hemisphere and for V$\lesssim17$ mag sources across the whole sky that are not included in APASS DR9., Comment: 17 pages, 14 figures. Accepted by MNRAS

Published
2019
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14. The ASAS-SN Catalog of Variable Stars III: Variables in the Southern TESS Continuous Viewing Zone

Author

Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Shields, J. V., Pojmanski, G., Otero, S., Hurst, N., Britt, C. A., Will, D., Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Shields, J. V., Pojmanski, G., Otero, S., Hurst, N., Britt, C. A., and Will, D.

Abstract

The All-Sky Automated Survey for Supernovae (ASAS-SN) provides long baseline (${\sim}4$ yrs) light curves for sources brighter than V$\lesssim17$ mag across the whole sky. The Transiting Exoplanet Survey Satellite (TESS) has started to produce high-quality light curves with a baseline of at least 27 days, eventually for most of the sky. The combination of ASAS-SN and TESS light curves probes both long and short term variability in great detail, especially towards the TESS continuous viewing zones (CVZ) at the ecliptic poles. We have produced ${\sim}1.3$ million V-band light curves covering a total of ${\sim}1000 \, \rm deg^2$ towards the southern TESS CVZ and have systematically searched these sources for variability. We have identified ${\sim} 11,700$ variables, including ${\sim} 7,000$ new discoveries. The light curves and characteristics of the variables are all available through the ASAS-SN variable stars database (https://asas-sn.osu.edu/variables). We also introduce an online resource to obtain pre-computed ASAS-SN V-band light curves (https://asas-sn.osu.edu/photometry) starting with the light curves of the ${\sim}1.3$ million sources studied in this work. This effort will be extended to provide ASAS-SN light curves for ${\sim}50\;$million sources over the entire sky., Comment: 13 pages, 12 figures. Accepted by MNRAS

Published
2018
Full Text
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15. The ASAS-SN Catalog of Variable Stars II: Uniform Classification of 412,000 Known Variables

Author

Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Shields, J. V., Pojmanski, G., Otero, S., Britt, C. A., Will, D., Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Shields, J. V., Pojmanski, G., Otero, S., Britt, C. A., and Will, D.

Abstract

The variable stars in the VSX catalog are derived from a multitude of inhomogeneous data sources and classification tools. This inhomogeneity complicates our understanding of variable star types, statistics, and properties, and it directly affects attempts to build training sets for current (and next) generation all-sky, time-domain surveys. We homogeneously analyze the ASAS-SN V-band light curves of ${\sim}412,000$ variables from the VSX catalog. The variables are classified using an updated random forest classifier with an $F_1$ score of 99.4\% and refinement criteria for individual classifications. We have derived periods for ${\sim}52,000$ variables in the VSX catalog that lack a period, and have reclassified ${\sim} 17,000$ sources into new broad variability groups with high confidence. We have also reclassified ${\sim} 94,000$ known variables with miscellaneous/generic classifications. The light curves, classifications, and a range of properties of the variables are all available through the ASAS-SN variable stars database (https://asas-sn.osu.edu/variables). We also include the V-band light curves for a set of ${\sim}4,000$ rare variables and transient sources, including cataclysmic variables, symbiotic binaries and flare stars., Comment: 37 pages, 42 figures, 11 tables. Accepted by MNRAS. The catalog of variable stars and the V-band light curves are available from the ASAS-SN Variable Stars Database at https://asas-sn.osu.edu/variables

Published
2018
Full Text
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16. The life cycles of Be viscous decretion discs: The case of {\omega} CMa

Author

Ghoreyshi, M. R., Carciofi, A. C., Rimulo, L. R., Vieira, R. G., Faes, D. M., Baade, D., Bjorkman, J. E., Otero, S., Rivinius, Th., Ghoreyshi, M. R., Carciofi, A. C., Rimulo, L. R., Vieira, R. G., Faes, D. M., Baade, D., Bjorkman, J. E., Otero, S., and Rivinius, Th.

Abstract

We analyzed V-band photometry of the Be star {\omega} CMa, obtained during the last four decades, during which the star went through four complete cycles of disc formation and dissipation. The data were simulated by hydrodynamic models based on a time-dependent implementation of the viscous decretion disc (VDD) paradigm, in which a disc around a fast-spinning Be star is formed by material ejected by the star and driven to progressively larger orbits by means of viscous torques. Our simulations offer a good description of the photometric variability during phases of disc formation and dissipation, which suggests that the VDD model adequately describes the structural evolution of the disc. Furthermore, our analysis allowed us to determine the viscosity parameter {\alpha}, as well as the net mass and angular momentum (AM) loss rates. We find that {\alpha} is variable, ranging from 0.1 to 1.0, not only from cycle to cycle but also within a given cycle. Additionally, build-up phases usually have larger values of {\alpha} than the dissipation phases. Furthermore, during dissipation the outward AM flux is not necessarily zero, meaning that {\omega} CMa does not experience a true quiescence but, instead, switches between a high to a low AM loss rate during which the disc quickly assumes an overall lower density but never zero. We confront the average AM loss rate with predictions from stellar evolution models for fast-rotating stars, and find that our measurements are smaller by more than one order of magnitude., Comment: 16 pages, 16 figures

Published
2018
Full Text
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17. The ASAS-SN Catalog of Variable Stars I: The Serendipitous Survey

Author

Jayasinghe, T., Kochanek, C. S., Stanek, K. Z., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Shields, J. V., Pojmanski, G., Otero, S., Britt, C. A., Will, D., Jayasinghe, T., Kochanek, C. S., Stanek, K. Z., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Shields, J. V., Pojmanski, G., Otero, S., Britt, C. A., and Will, D.

Abstract

The All-Sky Automated Survey for Supernovae (ASAS-SN) is the first optical survey to routinely monitor the whole sky with a cadence of $\sim2-3$ days down to V$\lesssim17$ mag. ASAS-SN has monitored the whole sky since 2014, collecting $\sim100-500$ epochs of observations per field. The V-band light curves for candidate variables identified during the search for supernovae are classified using a random forest classifier and visually verified. We present a catalog of 66,179 bright, new variable stars discovered during our search for supernovae, including 27,479 periodic variables and 38,700 irregular variables. V-band light curves for the ASAS-SN variables are available through the ASAS-SN variable stars database (https://asas-sn.osu.edu/variables). The database will begin to include the light curves of known variable stars in the near future along with the results for a systematic, all-sky variability survey., Comment: 21 pages, 19 figures, 5 tables. Accepted for publication in MNRAS. The catalog of variable stars and the V-band light curves are available from the ASAS-SN Variable Stars Database at https://asas-sn.osu.edu/variables

Published
2018
Full Text
View/download PDF

18. The ASAS-SN Catalog of Variable Stars III: Variables in the Southern TESS Continuous Viewing Zone

Author

Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Shields, J. V., Pojmanski, G., Otero, S., Hurst, N., Britt, C. A., Will, D., Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Shields, J. V., Pojmanski, G., Otero, S., Hurst, N., Britt, C. A., and Will, D.

Abstract

The All-Sky Automated Survey for Supernovae (ASAS-SN) provides long baseline (${\sim}4$ yrs) light curves for sources brighter than V$\lesssim17$ mag across the whole sky. The Transiting Exoplanet Survey Satellite (TESS) has started to produce high-quality light curves with a baseline of at least 27 days, eventually for most of the sky. The combination of ASAS-SN and TESS light curves probes both long and short term variability in great detail, especially towards the TESS continuous viewing zones (CVZ) at the ecliptic poles. We have produced ${\sim}1.3$ million V-band light curves covering a total of ${\sim}1000 \, \rm deg^2$ towards the southern TESS CVZ and have systematically searched these sources for variability. We have identified ${\sim} 11,700$ variables, including ${\sim} 7,000$ new discoveries. The light curves and characteristics of the variables are all available through the ASAS-SN variable stars database (https://asas-sn.osu.edu/variables). We also introduce an online resource to obtain pre-computed ASAS-SN V-band light curves (https://asas-sn.osu.edu/photometry) starting with the light curves of the ${\sim}1.3$ million sources studied in this work. This effort will be extended to provide ASAS-SN light curves for ${\sim}50\;$million sources over the entire sky., Comment: 13 pages, 12 figures. Accepted by MNRAS

Published
2018
Full Text
View/download PDF

19. The ASAS-SN Catalog of Variable Stars II: Uniform Classification of 412,000 Known Variables

Author

Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Shields, J. V., Pojmanski, G., Otero, S., Britt, C. A., Will, D., Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Pejcha, O., Shields, J. V., Pojmanski, G., Otero, S., Britt, C. A., and Will, D.

Abstract

The variable stars in the VSX catalog are derived from a multitude of inhomogeneous data sources and classification tools. This inhomogeneity complicates our understanding of variable star types, statistics, and properties, and it directly affects attempts to build training sets for current (and next) generation all-sky, time-domain surveys. We homogeneously analyze the ASAS-SN V-band light curves of ${\sim}412,000$ variables from the VSX catalog. The variables are classified using an updated random forest classifier with an $F_1$ score of 99.4\% and refinement criteria for individual classifications. We have derived periods for ${\sim}52,000$ variables in the VSX catalog that lack a period, and have reclassified ${\sim} 17,000$ sources into new broad variability groups with high confidence. We have also reclassified ${\sim} 94,000$ known variables with miscellaneous/generic classifications. The light curves, classifications, and a range of properties of the variables are all available through the ASAS-SN variable stars database (https://asas-sn.osu.edu/variables). We also include the V-band light curves for a set of ${\sim}4,000$ rare variables and transient sources, including cataclysmic variables, symbiotic binaries and flare stars., Comment: 37 pages, 42 figures, 11 tables. Accepted by MNRAS. The catalog of variable stars and the V-band light curves are available from the ASAS-SN Variable Stars Database at https://asas-sn.osu.edu/variables

Published
2018
Full Text
View/download PDF

20. The life cycles of Be viscous decretion discs: The case of {\omega} CMa

Author

Ghoreyshi, M. R., Carciofi, A. C., Rimulo, L. R., Vieira, R. G., Faes, D. M., Baade, D., Bjorkman, J. E., Otero, S., Rivinius, Th., Ghoreyshi, M. R., Carciofi, A. C., Rimulo, L. R., Vieira, R. G., Faes, D. M., Baade, D., Bjorkman, J. E., Otero, S., and Rivinius, Th.

Abstract

We analyzed V-band photometry of the Be star {\omega} CMa, obtained during the last four decades, during which the star went through four complete cycles of disc formation and dissipation. The data were simulated by hydrodynamic models based on a time-dependent implementation of the viscous decretion disc (VDD) paradigm, in which a disc around a fast-spinning Be star is formed by material ejected by the star and driven to progressively larger orbits by means of viscous torques. Our simulations offer a good description of the photometric variability during phases of disc formation and dissipation, which suggests that the VDD model adequately describes the structural evolution of the disc. Furthermore, our analysis allowed us to determine the viscosity parameter {\alpha}, as well as the net mass and angular momentum (AM) loss rates. We find that {\alpha} is variable, ranging from 0.1 to 1.0, not only from cycle to cycle but also within a given cycle. Additionally, build-up phases usually have larger values of {\alpha} than the dissipation phases. Furthermore, during dissipation the outward AM flux is not necessarily zero, meaning that {\omega} CMa does not experience a true quiescence but, instead, switches between a high to a low AM loss rate during which the disc quickly assumes an overall lower density but never zero. We confront the average AM loss rate with predictions from stellar evolution models for fast-rotating stars, and find that our measurements are smaller by more than one order of magnitude., Comment: 16 pages, 16 figures

Published
2018
Full Text
View/download PDF

21. The ASAS-SN Catalog of Variable Stars I: The Serendipitous Survey

Author

Jayasinghe, T., Kochanek, C. S., Stanek, K. Z., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Shields, J. V., Pojmanski, G., Otero, S., Britt, C. A., Will, D., Jayasinghe, T., Kochanek, C. S., Stanek, K. Z., Shappee, B. J., Holoien, T. W. -S., Thompson, Todd A., Prieto, J. L., Dong, Subo, Pawlak, M., Shields, J. V., Pojmanski, G., Otero, S., Britt, C. A., and Will, D.

Abstract

The All-Sky Automated Survey for Supernovae (ASAS-SN) is the first optical survey to routinely monitor the whole sky with a cadence of $\sim2-3$ days down to V$\lesssim17$ mag. ASAS-SN has monitored the whole sky since 2014, collecting $\sim100-500$ epochs of observations per field. The V-band light curves for candidate variables identified during the search for supernovae are classified using a random forest classifier and visually verified. We present a catalog of 66,179 bright, new variable stars discovered during our search for supernovae, including 27,479 periodic variables and 38,700 irregular variables. V-band light curves for the ASAS-SN variables are available through the ASAS-SN variable stars database (https://asas-sn.osu.edu/variables). The database will begin to include the light curves of known variable stars in the near future along with the results for a systematic, all-sky variability survey., Comment: 21 pages, 19 figures, 5 tables. Accepted for publication in MNRAS. The catalog of variable stars and the V-band light curves are available from the ASAS-SN Variable Stars Database at https://asas-sn.osu.edu/variables

Published
2018
Full Text
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22. Phloem unloading in Arabidopsis roots is convective and regulated by the phloem pole pericycle

Author

Ross-Elliott, T, Jensen, K, Haaning, K, Wager, B, Knoblauch, J, Howell, AH, Mullendore, DL, Monteith, AG, Paultre, D, Yan, D, Otero, S, Bourdon, M, Sager, R, Lee, J, Helariutta, Y, Knoblauch, M, Oparka, K, Ross-Elliott, T, Jensen, K, Haaning, K, Wager, B, Knoblauch, J, Howell, AH, Mullendore, DL, Monteith, AG, Paultre, D, Yan, D, Otero, S, Bourdon, M, Sager, R, Lee, J, Helariutta, Y, Knoblauch, M, and Oparka, K

Abstract

In plants, a complex mixture of solutes and macromolecules is transported by the phloem. Here, we examined how solutes and macromolecules are separated when they exit the phloem during the unloading process. We used a combination of approaches (non-invasive imaging, 3D-electron microscopy, and mathematical modelling) to show that phloem unloading of solutes in Arabidopsis roots occurs through plasmodesmata by a combination of mass flow and diffusion (convective phloem unloading). During unloading, solutes and proteins are diverted into the phloem-pole pericycle, a tissue connected to the protophloem by a unique class of ‘funnel plasmodesmata’. While solutes are unloaded without restriction, large proteins are released through funnel plasmodesmata in discrete pulses, a phenomenon we refer to as ‘batch unloading’. Unlike solutes, these proteins remain restricted to the phloem-pole pericycle. Our data demonstrate a major role for the phloem-pole pericycle in regulating phloem unloading in roots.

Published
2017

23. Interacting binaries W Serpentids and Double Periodic Variables

Author

Mennickent, R. E., Otero, S., Kołaczkowski, Z., Mennickent, R. E., Otero, S., and Kołaczkowski, Z.

Abstract

W Serpentids and Double Periodic Variables (DPVs) are candidates for close interacting binaries in a non-conservative evolutionary stage; while W Serpentids are defined by high-excitation ultraviolet emission lines present during most orbital phases, and by usually showing variable orbital periods, DPVs are characterized by a long photometric cycle lasting roughly 33 times the (practically constant) orbital period. We report the discovery of 7 new Galactic DPVs, increasing the number of known DPVs in our Galaxy by 50%. We find that DPVs are tangential-impact systems, i.e. their primaries have radii barely larger than the critical Lubow-Shu radius. These systems are expected to show transient discs, but we find that they host stable discs with radii smaller than the tidal radius. Among tangential-impact systems including DPVs and semi-detached Algols, only DPVs have primaries with masses between 7 and 10 $M_{\odot}$. We find that DPVs are in a Case-B mass transfer stage with donor masses between 1 and 2 M$_{\odot}$ and with primaries resembling Be stars. W Serpentids are impact and non-impact systems, their discs extend until the last non-intersecting orbit and show a larger range of stellar mass and mass ratio than DPVs. Infrared photometry reveals significant color excesses in many DPVs and W Serpentids, usually larger for the latter ones, suggesting variable amounts of circumstellar matter., Comment: 19 pages, 11 figures, 12 tables. To be published in MNRAS main journal

Published
2015

24. A search for photometric variability in magnetic chemically peculiar stars using ASAS-3 data

Author

Bernhard, K., Huemmerich, S., Otero, S., Paunzen, E., Bernhard, K., Huemmerich, S., Otero, S., and Paunzen, E.

Abstract

The (magnetic) chemically peculiar (CP) stars of the upper main sequence are well-suited laboratories for investigating the influence of magnetic fields on the stellar surface because they produce abundance inhomogeneities (spots), which results in photometric variability that is explained in terms of the oblique rotator model. CP stars exhibiting this phenomenon are normally classified as alpha2 Canum Venaticorum (ACV) variables. It is important to increase the sample of known rotational periods among CP stars by discovering new ACV variables. The ASAS-3 data were cross-correlated with the Catalogue of Ap, HgMn, and Am stars in order to analyse the light curves of bona fide CP and related stars. The light curves were downloaded and cleaned of outliers and data points with a flag indicating bad quality. Promising candidates showing a larger scatter than observed for constant stars in the corresponding magnitude range were searched for periodic signals using a standard Fourier technique. In total, we found 323 variables, from which 246 are reported here for the first time, and 77 were probably wrongly classified before. The observed variability pattern of most stars is in accordance with an ACV classification. For some cases, it is difficult to distinguish between the light curves of double-waved ACVs and the variability induced by orbital motion (ellipsoidal variables/eclipsing variables), especially for objects exhibiting very small amplitudes and/or significant scatter in their light curves. Thus, some eclipsing or rotating ellipsoidal variables might be present. However, we are confident that the given periods are the correct ones. There seems to be a possible weak correlation between the rotational period and colour, in the sense that cooler magnetic CP stars rotate more slowly. However, this correlation seems to disappear when correcting for the interstellar reddening., Comment: Accepted for publication in Astronomy and Astrophysics: 32 pages, 3 figures, 5 tables

Published
2015
Full Text
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25. Modeling the Complete Lightcurve of omega CMa

Author

Ghoreyshi, M. R., Carciofi, A. C., Rimulo, L. R., Otero, S., Baade, D., Bjorkman, J. E., Okazaki, A. T., Rivinius, Th., Ghoreyshi, M. R., Carciofi, A. C., Rimulo, L. R., Otero, S., Baade, D., Bjorkman, J. E., Okazaki, A. T., and Rivinius, Th.

Abstract

We have used the radiative transfer code HDUST to analyze and interpret the long-term photometric behavior of the Be star omega CMa, considering four complete cycles of disk formation and dissipation. This is the first time in which a full lightcurve of a Be star was investigated and modeled including both disk build-up and dissipation phases. Based on the quite good fit of the observed data we were able to derive the history of stellar mass decretion rates (including long- and short-term changes) during the disk formation and dissipation phases in all four cycles., Comment: 4 pages, 4 figures

Published
2015

26. Interacting binaries W Serpentids and Double Periodic Variables

Author

Mennickent, R. E., Otero, S., Kołaczkowski, Z., Mennickent, R. E., Otero, S., and Kołaczkowski, Z.

Abstract

W Serpentids and Double Periodic Variables (DPVs) are candidates for close interacting binaries in a non-conservative evolutionary stage; while W Serpentids are defined by high-excitation ultraviolet emission lines present during most orbital phases, and by usually showing variable orbital periods, DPVs are characterized by a long photometric cycle lasting roughly 33 times the (practically constant) orbital period. We report the discovery of 7 new Galactic DPVs, increasing the number of known DPVs in our Galaxy by 50%. We find that DPVs are tangential-impact systems, i.e. their primaries have radii barely larger than the critical Lubow-Shu radius. These systems are expected to show transient discs, but we find that they host stable discs with radii smaller than the tidal radius. Among tangential-impact systems including DPVs and semi-detached Algols, only DPVs have primaries with masses between 7 and 10 $M_{\odot}$. We find that DPVs are in a Case-B mass transfer stage with donor masses between 1 and 2 M$_{\odot}$ and with primaries resembling Be stars. W Serpentids are impact and non-impact systems, their discs extend until the last non-intersecting orbit and show a larger range of stellar mass and mass ratio than DPVs. Infrared photometry reveals significant color excesses in many DPVs and W Serpentids, usually larger for the latter ones, suggesting variable amounts of circumstellar matter., Comment: 19 pages, 11 figures, 12 tables. To be published in MNRAS main journal

Published
2015

27. A search for photometric variability in magnetic chemically peculiar stars using ASAS-3 data

Author

Bernhard, K., Huemmerich, S., Otero, S., Paunzen, E., Bernhard, K., Huemmerich, S., Otero, S., and Paunzen, E.

Abstract

The (magnetic) chemically peculiar (CP) stars of the upper main sequence are well-suited laboratories for investigating the influence of magnetic fields on the stellar surface because they produce abundance inhomogeneities (spots), which results in photometric variability that is explained in terms of the oblique rotator model. CP stars exhibiting this phenomenon are normally classified as alpha2 Canum Venaticorum (ACV) variables. It is important to increase the sample of known rotational periods among CP stars by discovering new ACV variables. The ASAS-3 data were cross-correlated with the Catalogue of Ap, HgMn, and Am stars in order to analyse the light curves of bona fide CP and related stars. The light curves were downloaded and cleaned of outliers and data points with a flag indicating bad quality. Promising candidates showing a larger scatter than observed for constant stars in the corresponding magnitude range were searched for periodic signals using a standard Fourier technique. In total, we found 323 variables, from which 246 are reported here for the first time, and 77 were probably wrongly classified before. The observed variability pattern of most stars is in accordance with an ACV classification. For some cases, it is difficult to distinguish between the light curves of double-waved ACVs and the variability induced by orbital motion (ellipsoidal variables/eclipsing variables), especially for objects exhibiting very small amplitudes and/or significant scatter in their light curves. Thus, some eclipsing or rotating ellipsoidal variables might be present. However, we are confident that the given periods are the correct ones. There seems to be a possible weak correlation between the rotational period and colour, in the sense that cooler magnetic CP stars rotate more slowly. However, this correlation seems to disappear when correcting for the interstellar reddening., Comment: Accepted for publication in Astronomy and Astrophysics: 32 pages, 3 figures, 5 tables

Published
2015
Full Text
View/download PDF

28. Modeling the Complete Lightcurve of omega CMa

Author

Ghoreyshi, M. R., Carciofi, A. C., Rimulo, L. R., Otero, S., Baade, D., Bjorkman, J. E., Okazaki, A. T., Rivinius, Th., Ghoreyshi, M. R., Carciofi, A. C., Rimulo, L. R., Otero, S., Baade, D., Bjorkman, J. E., Okazaki, A. T., and Rivinius, Th.

Abstract

We have used the radiative transfer code HDUST to analyze and interpret the long-term photometric behavior of the Be star omega CMa, considering four complete cycles of disk formation and dissipation. This is the first time in which a full lightcurve of a Be star was investigated and modeled including both disk build-up and dissipation phases. Based on the quite good fit of the observed data we were able to derive the history of stellar mass decretion rates (including long- and short-term changes) during the disk formation and dissipation phases in all four cycles., Comment: 4 pages, 4 figures

Published
2015

29. The yellow hypergiant HR 5171 A: Resolving a massive interacting binary in the common envelope phase

Author

Chesneau, O., Meilland, A., Chapellier, E., Millour, F., Van Genderen, A. M., Nazé, Y., Smith, N., Spang, A., Smoker, J. V., Dessart, L., Kanaan, S., Bendjoya, Ph., Feast, M. W., Groh, J. H., Lobel, A., Nardetto, N., Otero, S., Oudmaijer, R. D., Tekola, A. G., Whitelock, P. A., Arcos, C., Curé, M., Vanzi, L., Chesneau, O., Meilland, A., Chapellier, E., Millour, F., Van Genderen, A. M., Nazé, Y., Smith, N., Spang, A., Smoker, J. V., Dessart, L., Kanaan, S., Bendjoya, Ph., Feast, M. W., Groh, J. H., Lobel, A., Nardetto, N., Otero, S., Oudmaijer, R. D., Tekola, A. G., Whitelock, P. A., Arcos, C., Curé, M., and Vanzi, L.

Abstract

We initiated long-term optical interferometry monitoring of the diameters of unstable yellow hypergiants (YHG) with the goal of detecting both the long-term evolution of their radius and shorter term formation related to large mass-loss events. We observed HR5171 A with AMBER/VLTI. We also examined archival photometric data in the visual and near-IR spanning more than 60 years, as well as sparse spectroscopic data. HR5171A exhibits a complex appearance. Our AMBER data reveal a surprisingly large star for a YHG R*=1315+/-260Rsun\ (~6.1AU) at the distance of 3.6+/-0.5kpc. The source is surrounded by an extended nebulosity, and these data also show a large level of asymmetry in the brightness distribution of the system, which we attribute to a newly discovered companion star located in front of the primary star. The companion's signature is also detected in the visual photometry, which indicates an orbital period of Porb=1304+/-6d. Modeling the light curve with the NIGHTFALL program provides clear evidence that the system is a contact or possibly over-contact eclipsing binary. A total current system mass of 39^{+40}_{-22} solar mass and a high mass ratio q>10 is inferred for the system. The low-mass companion of HR5171 A is very close to the primary star that is embedded within its dense wind. Tight constraints on the inclination and vsini of the primary are lacking, which prevents us from determining its influence precisely on the mass-loss phenomenon, but the system is probably experiencing a wind Roche-Lobe overflow. Depending on the amount of angular momentum that can be transferred to the stellar envelope, HR5171 A may become a fast-rotating B[e]/Luminous Blue Variable (LBV)/Wolf-Rayet star. In any case, HR5171 A highlights the possible importance of binaries for interpreting the unstable YHGs and for massive star evolution in general., Comment: Accepted in Astronomy & Astrophysics (Jan 2014)

Published
2014
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30. EPA-0882 - Prediction of diagnosis of early-onset schizophrenia spectrum disorders using support vector machines

Author

Pina Camacho, L., Díaz Caneja, C.M., García Prieto, J., Parellada, M., Castro Fornieles, J., González Pinto, A., Bombin, I., Graell, M., Otero, S., Rapado Castro, M., Janssen, J., Baeza, I., Pozo Guerrero, Francisco del, Desco, M., Arango, C., Pina Camacho, L., Díaz Caneja, C.M., García Prieto, J., Parellada, M., Castro Fornieles, J., González Pinto, A., Bombin, I., Graell, M., Otero, S., Rapado Castro, M., Janssen, J., Baeza, I., Pozo Guerrero, Francisco del, Desco, M., and Arango, C.

Abstract

To develop a Support Vector Machine (SVM) algorithm as a predictive tool for diagnostic outcome in patients with FE-EOP, based on clinical and biomedical data at the emergence of the illness.

Published
2014

31. EPA-0882 - Prediction of diagnosis of early-onset schizophrenia spectrum disorders using support vector machines

Author

Pina Camacho, L., Díaz Caneja, C.M., García Prieto, J., Parellada, M., Castro Fornieles, J., González Pinto, A., Bombin, I., Graell, M., Otero, S., Rapado Castro, M., Janssen, J., Baeza, I., Pozo Guerrero, Francisco del, Desco, M., Arango, C., Pina Camacho, L., Díaz Caneja, C.M., García Prieto, J., Parellada, M., Castro Fornieles, J., González Pinto, A., Bombin, I., Graell, M., Otero, S., Rapado Castro, M., Janssen, J., Baeza, I., Pozo Guerrero, Francisco del, Desco, M., and Arango, C.

Abstract

To develop a Support Vector Machine (SVM) algorithm as a predictive tool for diagnostic outcome in patients with FE-EOP, based on clinical and biomedical data at the emergence of the illness.

Published
2014

32. The yellow hypergiant HR 5171 A: Resolving a massive interacting binary in the common envelope phase

Author

Chesneau, O., Meilland, A., Chapellier, E., Millour, F., Van Genderen, A. M., Nazé, Y., Smith, N., Spang, A., Smoker, J. V., Dessart, L., Kanaan, S., Bendjoya, Ph., Feast, M. W., Groh, J. H., Lobel, A., Nardetto, N., Otero, S., Oudmaijer, R. D., Tekola, A. G., Whitelock, P. A., Arcos, C., Curé, M., Vanzi, L., Chesneau, O., Meilland, A., Chapellier, E., Millour, F., Van Genderen, A. M., Nazé, Y., Smith, N., Spang, A., Smoker, J. V., Dessart, L., Kanaan, S., Bendjoya, Ph., Feast, M. W., Groh, J. H., Lobel, A., Nardetto, N., Otero, S., Oudmaijer, R. D., Tekola, A. G., Whitelock, P. A., Arcos, C., Curé, M., and Vanzi, L.

Abstract

We initiated long-term optical interferometry monitoring of the diameters of unstable yellow hypergiants (YHG) with the goal of detecting both the long-term evolution of their radius and shorter term formation related to large mass-loss events. We observed HR5171 A with AMBER/VLTI. We also examined archival photometric data in the visual and near-IR spanning more than 60 years, as well as sparse spectroscopic data. HR5171A exhibits a complex appearance. Our AMBER data reveal a surprisingly large star for a YHG R*=1315+/-260Rsun\ (~6.1AU) at the distance of 3.6+/-0.5kpc. The source is surrounded by an extended nebulosity, and these data also show a large level of asymmetry in the brightness distribution of the system, which we attribute to a newly discovered companion star located in front of the primary star. The companion's signature is also detected in the visual photometry, which indicates an orbital period of Porb=1304+/-6d. Modeling the light curve with the NIGHTFALL program provides clear evidence that the system is a contact or possibly over-contact eclipsing binary. A total current system mass of 39^{+40}_{-22} solar mass and a high mass ratio q>10 is inferred for the system. The low-mass companion of HR5171 A is very close to the primary star that is embedded within its dense wind. Tight constraints on the inclination and vsini of the primary are lacking, which prevents us from determining its influence precisely on the mass-loss phenomenon, but the system is probably experiencing a wind Roche-Lobe overflow. Depending on the amount of angular momentum that can be transferred to the stellar envelope, HR5171 A may become a fast-rotating B[e]/Luminous Blue Variable (LBV)/Wolf-Rayet star. In any case, HR5171 A highlights the possible importance of binaries for interpreting the unstable YHGs and for massive star evolution in general., Comment: Accepted in Astronomy & Astrophysics (Jan 2014)

Published
2014
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33. Spectroscopic Observations of \delta Sco Through the 2011 Periastron Passage

Author

Rivinius, Th., Štefl, S., Baade, D., Carciofi, A. C., Otero, S., Miroshnichenko, A. S., Manset, N., Rivinius, Th., Štefl, S., Baade, D., Carciofi, A. C., Otero, S., Miroshnichenko, A. S., and Manset, N.

Abstract

We present prelimiary results from a coordinated spectroscopic campaign in 2011, centered on the \delta Sco periastron passage in July. Data have mostly been obtained with the FEROS/2.2 m at La Silla and ESPaDOnS/CFHT at Mauna Kea echelle instruments. Main results include the absence of tidally induced disturbance to the main \beta Cephei pulsation mode and the absence of tidally triggered mass-ejection at time of periastron proper. The observed (as far as yet analyzed) variations are compatible with the picture of a disk that is disturbed on its outer radius, with the disturbance propagating inwards after the periastron., Comment: Presented in "Circumstellar Dynamics at High Resolution", Foz do Igua\c{c}u, Brazil, February 27 - March 02, to appear in 2012, ASP Conf. Series 464, in press

Published
2012

34. Unha proposta innovadora para educación infantil dende o proxecto KidsInnScience: as patacas poden medrar no aire

Author

Universidade de Santiago de Compostela. Departamento de Didáctica das Ciencias Experimentais, Blanco Anaya, Paloma, García-Rodeja Gayoso, Isabel, González, S., Jiménez Aleixandre, María Pilar, Otero, S., Real, S., Taboada, F., Valiño, L., Vázquez, D., Vidal, A., Universidade de Santiago de Compostela. Departamento de Didáctica das Ciencias Experimentais, Blanco Anaya, Paloma, García-Rodeja Gayoso, Isabel, González, S., Jiménez Aleixandre, María Pilar, Otero, S., Real, S., Taboada, F., Valiño, L., Vázquez, D., and Vidal, A.

Abstract

A proposta innovadora “As patacas poden medrar no aire” está destinada para o alumnado de educación infantil e enmárcase no proxecto europeo KidsInnScience: turning kids on to science. Neste proxecto participan dez países, dous latinoamericanos e no que participa a Universidade de Santiago de Compostela xunto con outros sete países europeos e dous latinoamericanos

Published
2012

35. Auxin and epigenetic regulation of SKP2B, an F-box that represses lateral root formation

Author

Manzano, C., Ramirez-Parra, E., Casimiro, I., Otero, S., Desvoyes, B., De Rybel, B., Beeckman, T., Casero, P., Gutierrez, C., del Pozo, J. C., Manzano, C., Ramirez-Parra, E., Casimiro, I., Otero, S., Desvoyes, B., De Rybel, B., Beeckman, T., Casero, P., Gutierrez, C., and del Pozo, J. C.

Abstract

In plants, lateral roots originate from pericycle founder cells that are specified at regular intervals along the main root. Here, we show that Arabidopsis (Arabidopsis thaliana) SKP2B (for S-Phase Kinase-Associated Protein2B), an F-box protein, negatively regulates cell cycle and lateral root formation as it represses meristematic and founder cell divisions. According to its function, SKP2B is expressed in founder cells, lateral root primordia and the root apical meristem. We identified a novel motif in the SKP2B promoter that is required for its specific root expression and auxin-dependent induction in the pericycle cells. Next to a transcriptional control by auxin, SKP2B expression is regulated by histone H3.1/H3.3 deposition in a CAF-dependent manner. The SKP2B promoter and the 59 end of the transcribed region are enriched in H3.3, which is associated with active chromatin states, over H3.1. Furthermore, the SKP2B promoter is also regulated by H3 acetylation in an auxin- and IAA14-dependent manner, reinforcing the idea that epigenetics represents an important regulatory mechanism during lateral root formation. © 2012 American Society of Plant Biologists. All Rights Reserved.

Published
2012

36. Spectroscopic Observations of \delta Sco Through the 2011 Periastron Passage

Author

Rivinius, Th., Štefl, S., Baade, D., Carciofi, A. C., Otero, S., Miroshnichenko, A. S., Manset, N., Rivinius, Th., Štefl, S., Baade, D., Carciofi, A. C., Otero, S., Miroshnichenko, A. S., and Manset, N.

Abstract

We present prelimiary results from a coordinated spectroscopic campaign in 2011, centered on the \delta Sco periastron passage in July. Data have mostly been obtained with the FEROS/2.2 m at La Silla and ESPaDOnS/CFHT at Mauna Kea echelle instruments. Main results include the absence of tidally induced disturbance to the main \beta Cephei pulsation mode and the absence of tidally triggered mass-ejection at time of periastron proper. The observed (as far as yet analyzed) variations are compatible with the picture of a disk that is disturbed on its outer radius, with the disturbance propagating inwards after the periastron., Comment: Presented in "Circumstellar Dynamics at High Resolution", Foz do Igua\c{c}u, Brazil, February 27 - March 02, to appear in 2012, ASP Conf. Series 464, in press

Published
2012

37. Assess, compare and enhance the status of Persons with Multiple Sclerosis (MS) in Europe:a European Register for MS

Author

Pugliatti, M, Eskic, D, Mikolcić, T, Pitschnau-Michel, D, Myhr, K-M, Sastre-Garriga, J, Otero, S, Wieczynska, L, Torje, C, Holloway, E, Rienhoff, O, Friede, T, Buckow, K, Ellenberger, D, Hillert, J, Glaser, Anne-Marie Søderberg, Flachenecker, P, Fuge, J, Schyns-Liharska, T, Kasilingam, E, Moretti, A, Thalheim, C, Sørensen, Per Soelberg, Pugliatti, M, Eskic, D, Mikolcić, T, Pitschnau-Michel, D, Myhr, K-M, Sastre-Garriga, J, Otero, S, Wieczynska, L, Torje, C, Holloway, E, Rienhoff, O, Friede, T, Buckow, K, Ellenberger, D, Hillert, J, Glaser, Anne-Marie Søderberg, Flachenecker, P, Fuge, J, Schyns-Liharska, T, Kasilingam, E, Moretti, A, Thalheim, C, and Sørensen, Per Soelberg

Abstract

Persons with multiple sclerosis (PwMS) experience health-related quality of life (HRQoL) problems greatly differing across Europe, and the European Union (EU) faces deep inequalities in MS management from country to country. Through the establishment of a European MS Register (EUReMS), an effective action is proposed to improve the overall knowledge on MS and support effective intervention programmes at EU and national political level. EUReMS aims to achieve consensus on its mission and vision, to define existing data providers, to develop models driving future MS health policies and research, to develop an information technology (IT) infrastructure for a data set, to develop a European shared governance and to secure providers' data provision into EUReMS.

Published
2012

38. Assess, compare and enhance the status of Persons with Multiple Sclerosis (MS) in Europe:a European Register for MS

Author

Pugliatti, M, Eskic, D, Mikolcić, T, Pitschnau-Michel, D, Myhr, K-M, Sastre-Garriga, J, Otero, S, Wieczynska, L, Torje, C, Holloway, E, Rienhoff, O, Friede, T, Buckow, K, Ellenberger, D, Hillert, J, Glaser, Anne-Marie Søderberg, Flachenecker, P, Fuge, J, Schyns-Liharska, T, Kasilingam, E, Moretti, A, Thalheim, C, Sørensen, Per Soelberg, Pugliatti, M, Eskic, D, Mikolcić, T, Pitschnau-Michel, D, Myhr, K-M, Sastre-Garriga, J, Otero, S, Wieczynska, L, Torje, C, Holloway, E, Rienhoff, O, Friede, T, Buckow, K, Ellenberger, D, Hillert, J, Glaser, Anne-Marie Søderberg, Flachenecker, P, Fuge, J, Schyns-Liharska, T, Kasilingam, E, Moretti, A, Thalheim, C, and Sørensen, Per Soelberg

Abstract

Persons with multiple sclerosis (PwMS) experience health-related quality of life (HRQoL) problems greatly differing across Europe, and the European Union (EU) faces deep inequalities in MS management from country to country. Through the establishment of a European MS Register (EUReMS), an effective action is proposed to improve the overall knowledge on MS and support effective intervention programmes at EU and national political level. EUReMS aims to achieve consensus on its mission and vision, to define existing data providers, to develop models driving future MS health policies and research, to develop an information technology (IT) infrastructure for a data set, to develop a European shared governance and to secure providers' data provision into EUReMS.

Published
2012

39. Combining Visual and Photoelectric Observations of Semi-Regular Red Variables

Author

Moon, T. T., Otero, S. A., Kiss, L. L., Moon, T. T., Otero, S. A., and Kiss, L. L.

Abstract

Combining visual observations of SR variables with measurements of them using a photoelectric photometer is discussed then demonstrated using data obtained for the bright, southern SR variable theta Aps. Combining such observations is useful in that it can provide a more comprehensive set of data by extending the temporal coverage of the light curve. Typically there are systematic differences in the visual and photometric datasets that must be corrected for., Comment: accepted for publication in the Journal of the AAVSO

Published
2007

40. Combining Visual and Photoelectric Observations of Semi-Regular Red Variables

Author

Moon, T. T., Otero, S. A., Kiss, L. L., Moon, T. T., Otero, S. A., and Kiss, L. L.

Abstract

Combining visual observations of SR variables with measurements of them using a photoelectric photometer is discussed then demonstrated using data obtained for the bright, southern SR variable theta Aps. Combining such observations is useful in that it can provide a more comprehensive set of data by extending the temporal coverage of the light curve. Typically there are systematic differences in the visual and photometric datasets that must be corrected for., Comment: accepted for publication in the Journal of the AAVSO

Published
2007

41. Combining Visual and Photoelectric Observations of Semi-Regular Red Variables

Author

Moon, T. T., Otero, S. A., Kiss, L. L., Moon, T. T., Otero, S. A., and Kiss, L. L.

Abstract

Combining visual observations of SR variables with measurements of them using a photoelectric photometer is discussed then demonstrated using data obtained for the bright, southern SR variable theta Aps. Combining such observations is useful in that it can provide a more comprehensive set of data by extending the temporal coverage of the light curve. Typically there are systematic differences in the visual and photometric datasets that must be corrected for., Comment: accepted for publication in the Journal of the AAVSO

Published
2007

42. The LHCb Silicon Tracker Project

Author

Agari, M., Bauer, C., Baumeister, D., Blouw, J., Hofmann, W., Knöpfle, K.T., Löchner, S., Schmelling, M., Pugatch, V., Bay, A., Carron, B., Frei, Regina, Jiminez-Otero, S., Tran, M.T., Voss, H., Adeva, B., Esperante, D., Lois, C., Vasquez, P., Bernhard, R.P., Bernet, R., Ermoline, Y., Gassner, J., Köstner, S., Lehner, F., Needham, M., Siegler, M., Steinkamp, O., Straumann, U., Vollhardt, A., Volyanskyy, D., Agari, M., Bauer, C., Baumeister, D., Blouw, J., Hofmann, W., Knöpfle, K.T., Löchner, S., Schmelling, M., Pugatch, V., Bay, A., Carron, B., Frei, Regina, Jiminez-Otero, S., Tran, M.T., Voss, H., Adeva, B., Esperante, D., Lois, C., Vasquez, P., Bernhard, R.P., Bernet, R., Ermoline, Y., Gassner, J., Köstner, S., Lehner, F., Needham, M., Siegler, M., Steinkamp, O., Straumann, U., Vollhardt, A., and Volyanskyy, D.

Abstract

Two silicon strip detectors, the Trigger Tracker(TT) and the Inner Tracker(IT) will be constructed for the LHCb experiment. Transverse momentum information extracted from the TT will be used in the Level 1 trigger. The IT is part of the main tracking system behind the magnet. Both silicon detectors will be read out using a custom-developed chip by the ASIC lab in Heidelberg. The signal-over-noise behavior and performance of various geometrical designs of the silicon sensors, in conjunction with the Beetle read-out chip, have been extensively studied in test beam experiments. Results from those experiments are presented, and have been used in the final choice of sensor geometry.

Published
2006

43. LHCb Silicon Tracker Performance Studies

Author

Kostner, S., Adeva, B., Agari, M., Bauer, C., Baumeister, D., Bay, A., Bernhard, R.P., Bernet, R., Blouw, J., Carron, B., Ermoline, Y., Esperante, D., Frei, Regina, Gassner, J., Hofmann, W., Jimenez-Otero, S., Knopfle, K.T., Lehner, F., Lochner, S., Lois, C., Needham, M., Perron, A., Pugatch, V., Schmelling, M., Schwingenheuer, B., Siegler, M., Steinkamp, O., Straumann, U., Tran, M.T., Vazques, P., Vollhardt, A., Volyanski, D., Voss, H., Kostner, S., Adeva, B., Agari, M., Bauer, C., Baumeister, D., Bay, A., Bernhard, R.P., Bernet, R., Blouw, J., Carron, B., Ermoline, Y., Esperante, D., Frei, Regina, Gassner, J., Hofmann, W., Jimenez-Otero, S., Knopfle, K.T., Lehner, F., Lochner, S., Lois, C., Needham, M., Perron, A., Pugatch, V., Schmelling, M., Schwingenheuer, B., Siegler, M., Steinkamp, O., Straumann, U., Tran, M.T., Vazques, P., Vollhardt, A., Volyanski, D., and Voss, H.

Abstract

LHCb is one of the experiments for the Large Hadron Collider at CERN and is dedicated to B-physics and CP-violation measurements. To exploit its physics potential good tracking performance with high efficiency in a high particle density environment close to the beam pipe is required. Silicon strip detectors with large read-out pitch and long strips will be used for the LHCb Inner Tracker behind the magnet and the Trigger Tracker station in front of the magnet. We report here about the design of the Silicon Tracker, test beam results and the electrical tests foreseen during production

Published
2006

44. LHCb Silicon Tracker Performance Studies

Author

Kostner, S., Adeva, B., Agari, M., Bauer, C., Baumeister, D., Bay, A., Bernhard, R.P., Bernet, R., Blouw, J., Carron, B., Ermoline, Y., Esperante, D., Frei, Regina, Gassner, J., Hofmann, W., Jimenez-Otero, S., Knopfle, K.T., Lehner, F., Lochner, S., Lois, C., Needham, M., Perron, A., Pugatch, V., Schmelling, M., Schwingenheuer, B., Siegler, M., Steinkamp, O., Straumann, U., Tran, M.T., Vazques, P., Vollhardt, A., Volyanski, D., Voss, H., Kostner, S., Adeva, B., Agari, M., Bauer, C., Baumeister, D., Bay, A., Bernhard, R.P., Bernet, R., Blouw, J., Carron, B., Ermoline, Y., Esperante, D., Frei, Regina, Gassner, J., Hofmann, W., Jimenez-Otero, S., Knopfle, K.T., Lehner, F., Lochner, S., Lois, C., Needham, M., Perron, A., Pugatch, V., Schmelling, M., Schwingenheuer, B., Siegler, M., Steinkamp, O., Straumann, U., Tran, M.T., Vazques, P., Vollhardt, A., Volyanski, D., and Voss, H.

Abstract

LHCb is one of the experiments for the Large Hadron Collider at CERN and is dedicated to B-physics and CP-violation measurements. To exploit its physics potential good tracking performance with high efficiency in a high particle density environment close to the beam pipe is required. Silicon strip detectors with large read-out pitch and long strips will be used for the LHCb Inner Tracker behind the magnet and the Trigger Tracker station in front of the magnet. We report here about the design of the Silicon Tracker, test beam results and the electrical tests foreseen during production

Published
2006

45. The LHCb Silicon Tracker Project

Author

Agari, M., Bauer, C., Baumeister, D., Blouw, J., Hofmann, W., Knöpfle, K.T., Löchner, S., Schmelling, M., Pugatch, V., Bay, A., Carron, B., Frei, Regina, Jiminez-Otero, S., Tran, M.T., Voss, H., Adeva, B., Esperante, D., Lois, C., Vasquez, P., Bernhard, R.P., Bernet, R., Ermoline, Y., Gassner, J., Köstner, S., Lehner, F., Needham, M., Siegler, M., Steinkamp, O., Straumann, U., Vollhardt, A., Volyanskyy, D., Agari, M., Bauer, C., Baumeister, D., Blouw, J., Hofmann, W., Knöpfle, K.T., Löchner, S., Schmelling, M., Pugatch, V., Bay, A., Carron, B., Frei, Regina, Jiminez-Otero, S., Tran, M.T., Voss, H., Adeva, B., Esperante, D., Lois, C., Vasquez, P., Bernhard, R.P., Bernet, R., Ermoline, Y., Gassner, J., Köstner, S., Lehner, F., Needham, M., Siegler, M., Steinkamp, O., Straumann, U., Vollhardt, A., and Volyanskyy, D.

Abstract

Two silicon strip detectors, the Trigger Tracker(TT) and the Inner Tracker(IT) will be constructed for the LHCb experiment. Transverse momentum information extracted from the TT will be used in the Level 1 trigger. The IT is part of the main tracking system behind the magnet. Both silicon detectors will be read out using a custom-developed chip by the ASIC lab in Heidelberg. The signal-over-noise behavior and performance of various geometrical designs of the silicon sensors, in conjunction with the Beetle read-out chip, have been extensively studied in test beam experiments. Results from those experiments are presented, and have been used in the final choice of sensor geometry.

Published
2006

46. LHCb Silicon Tracker Performance Studies

Author

Kostner, S., Adeva, B., Agari, M., Bauer, C., Baumeister, D., Bay, A., Bernhard, R.P., Bernet, R., Blouw, J., Carron, B., Ermoline, Y., Esperante, D., Frei, Regina, Gassner, J., Hofmann, W., Jimenez-Otero, S., Knopfle, K.T., Lehner, F., Lochner, S., Lois, C., Needham, M., Perron, A., Pugatch, V., Schmelling, M., Schwingenheuer, B., Siegler, M., Steinkamp, O., Straumann, U., Tran, M.T., Vazques, P., Vollhardt, A., Volyanski, D., Voss, H., Kostner, S., Adeva, B., Agari, M., Bauer, C., Baumeister, D., Bay, A., Bernhard, R.P., Bernet, R., Blouw, J., Carron, B., Ermoline, Y., Esperante, D., Frei, Regina, Gassner, J., Hofmann, W., Jimenez-Otero, S., Knopfle, K.T., Lehner, F., Lochner, S., Lois, C., Needham, M., Perron, A., Pugatch, V., Schmelling, M., Schwingenheuer, B., Siegler, M., Steinkamp, O., Straumann, U., Tran, M.T., Vazques, P., Vollhardt, A., Volyanski, D., and Voss, H.

Abstract

LHCb is one of the experiments for the Large Hadron Collider at CERN and is dedicated to B-physics and CP-violation measurements. To exploit its physics potential good tracking performance with high efficiency in a high particle density environment close to the beam pipe is required. Silicon strip detectors with large read-out pitch and long strips will be used for the LHCb Inner Tracker behind the magnet and the Trigger Tracker station in front of the magnet. We report here about the design of the Silicon Tracker, test beam results and the electrical tests foreseen during production

Published
2006

47. The LHCb Silicon Tracker Project

Author

Agari, M., Bauer, C., Baumeister, D., Blouw, J., Hofmann, W., Knöpfle, K.T., Löchner, S., Schmelling, M., Pugatch, V., Bay, A., Carron, B., Frei, Regina, Jiminez-Otero, S., Tran, M.T., Voss, H., Adeva, B., Esperante, D., Lois, C., Vasquez, P., Bernhard, R.P., Bernet, R., Ermoline, Y., Gassner, J., Köstner, S., Lehner, F., Needham, M., Siegler, M., Steinkamp, O., Straumann, U., Vollhardt, A., Volyanskyy, D., Agari, M., Bauer, C., Baumeister, D., Blouw, J., Hofmann, W., Knöpfle, K.T., Löchner, S., Schmelling, M., Pugatch, V., Bay, A., Carron, B., Frei, Regina, Jiminez-Otero, S., Tran, M.T., Voss, H., Adeva, B., Esperante, D., Lois, C., Vasquez, P., Bernhard, R.P., Bernet, R., Ermoline, Y., Gassner, J., Köstner, S., Lehner, F., Needham, M., Siegler, M., Steinkamp, O., Straumann, U., Vollhardt, A., and Volyanskyy, D.

Abstract

Two silicon strip detectors, the Trigger Tracker(TT) and the Inner Tracker(IT) will be constructed for the LHCb experiment. Transverse momentum information extracted from the TT will be used in the Level 1 trigger. The IT is part of the main tracking system behind the magnet. Both silicon detectors will be read out using a custom-developed chip by the ASIC lab in Heidelberg. The signal-over-noise behavior and performance of various geometrical designs of the silicon sensors, in conjunction with the Beetle read-out chip, have been extensively studied in test beam experiments. Results from those experiments are presented, and have been used in the final choice of sensor geometry.

Published
2006

48. The LHCb Detector at the LHC

Author

Alves, A Augusto, Andrade, L M, Barbosa-Ademarlaudo, F, Bediaga, I, Cernicchiaro, G, Guerrer, G, Lima, H P, Machado, A A, Magnin, J, Marujo, F, De Miranda, J M, Reis, A, Santos, A, Toledo, A, Akiba, K, Amato, S, de Paula, B, De Paula, L, Da Silva, T, Gandelman, M, Lopes, J H, Maréchal, B, Moraes, D, Polycarpo, E, Rodrigues, F, Ballansat, J, Bastian, Y, Boget, D, De Bonis, I, Coco, V, David, P Y, Décamp, D, Delebecque, P, Drancourt, C, Dumont-Dayot, N, Girard, C, Lieunard, B, Minard, M N, Pietrzyk, B, Rambure, T, Rospabe, G, T'Jampens, S, Ajaltouni, Z, Böhner, G, Bonnefoy, R, Borras, D, Cârloganu, C, Chanal, H, Conte, E, Cornat, R, Crouau, M, Delage, E, Deschamps, O, Henrard, P, Jacquet, P, Lacan, C, Laubser, J, Lecoq, J, Lefèvre, R, Magne, M, Martemyanov, M, Mercier, M L, Monteil, S, Niess, V, Perret, P, Reinmuth, G, Robert, A, Suchorski, S, Arnaud, K, Aslanides, E, Babel, J, Benchouk, C, Cachemiche, J P, Cogan, J, Derue, F, Dinkespiler, B, Duval, P Y, Garonne, V, Favard, S, Le Gac, R, Leon, F, Leroy, O, Liotard, P L, Marin, F, Menouni, M, Ollive, P, Poss, S, Roche, A, Sapunov, M, Tocco, L, Viaud, B, Tsaregorodtsev, A, Amhis, Y, Barrand, G, Barsuk, S, Beigbeder, C, Beneyton, R, Breton, D, Callot, O, Charlet, D, D'Almagne, B, Duarte, O, Fulda-Quenzer, F, Jacholkowska, A, Jean-Marie, B, Lefrançois, J, Machefert, F, Robbe, P, Schune, M H, Tocut, V, Videau, I, Benayoun, M, David, P, Del Buono, L, Gilles, G, Domke, M, Futterschneider, H, Ilgner, C, Kapusta, P, Kolander, M, Krause, R, Lieng, M, Nedos, M, Rudloff, K, Schleich, S, Schwierz, R, Spaan, B, Wacker, K, Warda, K, Agari, M, Bauer, C, Baumeister, D, Bulian, N, Fuchs, H P, Fallot-Burghardt, W, Glebe, T, Hofmann, W, Knöpfle, K T, Löchner, S, Ludwig, A, Maciuc, F, Sánchez-Nieto, F, Schmelling, M, Schwingenheuer, B, Sexauer, E, Smale, N J, Trunk, U, Voss, H, Albrecht, J, Bachmann, S, Blouw, J, Deissenroth, M, Deppe, H, Dreis, H B, Eisele, F, Haas, T, Hansmann-Menzemer, S, Hennenberger, S, Knopf, J, Moch, M, Perieanu, A, Rabenecker, S, Rausch, A, Rummel, C, Rusnyak, R, Schiller, M, Stange, U, Uwer, U, Walter, M, Ziegler, R, Avoni, G, Balbi, G, Bonifazi, F, Bortolotti, D, Carbone, A, D'Antone, I, Galli, D, Gregori, D, Lax, I, Marconi, U, Peco, G, Vagnoni, V, Valenti, G, Vecchi, S, Bonivento, W, Cardini, A, Cadeddu, S, De Leo, V, Deplano, C, Furcas, S, Lai, A, Oldeman, R, Raspino, D, Saitta, B, Serra, N, Baldini, W, Brusa, S, Chiozzi, S, Cotta-Ramusino, A, Evangelisti, F, Franconieri, A, Germani, S, Gianoli, A, Guoming, L, Landi, L, Malaguti, R, Padoan, C, Pennini, C, Savrié, M, Squerzanti, S, Zhao, T, Zhu, M, Bizzeti, A, Graziani, G, Lenti, M, Lenzi, M, Maletta, F, Pennazzi, S, Passaleva, G, Veltri, M, Alfonsi, M, Anelli, M, Balla, A, Battisti, A, Bencivenni, G, Campana, P, Carletti, M, Ciambrone, P, Corradi, G, Dane, E, DiVirgilio, A, De Simone, P, Felici, G, Forti, C, Gatta, M, Lanfranchi, G, Murtas, F, Pistilli, M, Poli-Lener, M, Rosellini, R, Santoni, M, Saputi, A, Sarti, A, Sciubba, A, Zossi, A, Ameri, M, Cuneo, S, Fontanelli, F, Gracco, V, Mini, G, Parodi, M, Petrolini, A, Sannino, M, Vinci, A, Alemi, M, Arnaboldi, C, Bellunato, T, Calvi, M, Chignoli, F, De Lucia, A, Galotta, G, Mazza, R, Matteuzzi, C, Musy, M, Negri, P, Perego, D, Pessina, G, Auriemma, G, Bocci, V, Buccheri, A, Chiodi, G, Di Marco, S, Iacoangeli, F, Martellotti, G, Nobrega, R, Pelosi, A, Penso, G, Pinci, D, Rinaldi, W, Rossi, A, Santacesaria, R, Satriano, C, Carboni, G, Iannilli, M, Massafferri Rodrigues, A, Messi, R, Paoluzzi, G, Sabatino, G, Santovetti, E, Satta, A, Amoraal, J, van Apeldoorn, G, Arink, R, Van Bakel, N, Band, H, Bauer, T, Berkien, A, van Beuzekom, M, Bos, E, Bron, C, Ceelie, L, Doets, M, Van der Eijk, R, Fransen, J P, de Groen, P, Gromov, V, Hierck, R, Homma, J, Hommels, B, Hoogland, W, Jans, E, Jansen, F, Jansen, L, Jaspers, M, Kaan, B, Köne, B, Koopstra, J, Kroes, F, Kraan, M, Langedijk, J, Merk, M, Mos, S, Munneke, B, Palacios, J, Papadelis, A, Pellegrino, A, Van Petten, O, du Pree, T, Roeland, E, Rückstuhl, W, Schimmel, A, Schuijlenburg, H, Sluijk, T, Spelt, J, Stolte, J, Terrier, H, Tuning, N, Van Lysebetten, A, Vankov, P, Verkooijen, J, Verlaat, B, Vink, W, De Vries, H, Wiggers, L, Ybeles Smit, G, Zaitsev, N, Zupan, M, Zwart, A, van den Brand, J, Bulten, H J, De Jong, M, Ketel, T, Klous, S, Kos, J, M'charek, B, Mul, F, Raven, G, Simioni, E, Cheng, J, Dai, G, Deng, Z, Gao, Y, Gong, G, Gong, H, He, J, Hou, L, Li, J, Qian, W, Shao, B, Xue, T, Yang, Z, Zeng, M, Muryn, B, Ciba, K, Oblakowska-Mucha, A, Blocki, J, Galuszka, K, Hajduk, L, Michalowski, J, Natkaniec, Z, Polok, G, Stodulski, M, Witek, M, Brzozowski, K, Chlopik, A, Gawor, P, Guzik, Z, Nawrot, A, Srednicki, A, Syryczynski, K, Szczekowski, M, Constantin, F, Cristian, P, Mihon, G, Pavel, C, Stoica, S, Filippov, S, Gavrilov, Yu, Golyshkin, L, Gushchin, E, Karavichev, O, Klubakov, V, Kravchuk, L, Kutuzov, V, Laptev, S, Popov, S, Arefev, A, Bobchenko, B, Dolgoshein, V, Egorychev, V, Golutvin, A, Gushchin, O, Konoplyannikov, A, Korolko, I, Kvaratskheliia, T, Machikhiliyan, I, Malyshev, S, Mayatskaya, E, Prokudin, M, Rusinov, D, Rusinov, V, Shatalov, P, Shchutska, L, Tarkovskiy, E, Tayduganov, A, Voronchev, K, Zhiryakova, O, Bobrov, A, Bondar, A, Eidelman, S, Kozlinsky, A, Shekhtman, L, Belous, K S, Dzhelyadin, R I, Gelitsky, Yu V, Gouz, Yu P, Kachnov, K G, Kobelev, A S, Matveev, V D, Novikov, V P, Obraztsov, V F, Ostankov, A P, Romanovsky, V I, Rykalin, V I, Soldatov, A P, Soldatov, M M, Tchernov, E N, Yushchenko, O P, Bochin, B, Bondar, N, Fedorov, O, Golovtsov, V, Guets, S, Kashchuk, A, Lazarev, V, Maev, O, Neustroev, P, Sagidova, N, Spiridenkov, E, Volkov, S, Vorobyev, An, Vorobyov, A, Aguiló, E, Bota, S, Calvo, M, Comerma, A, Cano, X, Diéguez, A, Herms, A, López, E, Luengo, S, Garra, J, Garrido, L, Gascón, D, Gaspar de Valenzuela, A, González, C, Graciani, R, Graugès-Pous, E, Pérez-Calero Yzquierdo, A, Picatoste, E, Riera, J, Roselló, M, Ruiz, H, Vilasís, X, Xirgu, X, Adeva, B, Cid Vidal, X, Martenez Santos, D, Esperante-Pereira, D, Fungueirino-Pazos, J L, Gallas Torreira, A, Lois-Gómez, C, Pazos-Alvarez, A, Pérez-Trigo, E, Pló-Casasus, M, Rodriguez Cobo, C, Rodriguez Perez, P, Saborido, J J, Seco, M, Vázquez-Regueiro, P, Bartalini, P, Bay, A, Bettler, M O, Blanc, F, Borel, J, Carron, B, Currat, C, Conti, G, Dormond, O, Ermoline, Y, Fauland, P, Fernández, L, Frei, R, Gagliardi, G, Gueissaz, N, Haefeli, G, Hicheur, A, Jacoby, C, Jalocha, P, Jiménez-Otero, S, Hertig, J P, Knecht, M, Legger, F, Locatelli, L, Moser, J R, Needham, M, Nicolas, L, Perrin-Giacomin, A, Perroud, Jean-Pierre, Potterat, C, Ronga, F, Schneider, O, Schietinger, T, Steele, D, Studer, L, Tareb, M, Tran, M T, van Hunen, J, Vervink, K, Villa, S, Zwahlen, N, Bernet, R, Buchler, A, Gassner, J, Lehner, F, Sakhelashvili, T, Salzmann, C, Sievers, P, Steiner, S, Steinkamp, O, Straumann, U, Van Tilburg, J, Vollhardt, A, Volyanskyy, D, Ziegler, M, Dovbnya, A, Ranyuk, Yu, Shapoval, I, Borisova, M, Iakovenko, V, Kyva, V, Kovalchuk, O, Okhrimenko, O, Pugatch, V, Pylypchenko, Yu, Adinolfi, M, Brook, N H, Head, R D, Imong, J P, Lessnoff, K A, Metlica, F C D, Muir, A J, Rademacker, J H, Solomin, A, Szczypka, P M, Barham, C, Buszello, C, Dickens, J, Gibson, V, Haines, S, Harrison, K, Jones, C R, Katvars, S, Kerzel, U, Lazzeroni, C, Li, Y Y, Rogers, G, Storey, J, Skottowe, H, Wotton, S A, Adye, T J, Densham, C J, Easo, S, Franek, B, Loveridge, P, Morrow, D, Morris, J V, Nandakumar, R, Nardulli, J, Papanestis, A, Patrick, G N, Ricciardi, S, Woodward, M L, Zhang, Z, Chamonal, R J U, Clark, P J, Clarke, P, Eisenhardt, S, Gilardi, N, Khan, A, Kim, Y M, Lambert, Robert W, Lawrence, J, Main, A, McCarron, J, Mclean, C, Muheim, F, Osorio-Oliveros, A F, Playfer, S, Styles, N, Xie, Y, Bates, A, Carson, L, da Cunha Marinho, F, Doherty, F, Eklund, L, Gersabeck, M, Haddad, L, Macgregor, A A, Melone, J, McEwan, F, Petrie, D M, Paterson, S K, Parkes, C, Pickford, A, Rakotomiaramanana, B, Rodrigues, E, Saavedra, A F, Soler, F J P, Szumlak, T, Viret, S, Allebone, L, Awunor, O, Back, J, Barber, G, Barnes, C, Cameron, B, Clark, D, Clark, I, Dornan, Peter John, Duane, A, Eames, C, Egede, U, Girone, M, Greenwood, S, Hallam, R, Hare, R, Howard, A, Jolly, S, Kasey, V, Khaleeq, M, Koppenburg, P, Miller, D, Plackett, R, Price, D, Reece, W, Savage, P, Savidge, T, Simmons, B, Vidal-Sitjes, G, Websdale, D M, Affolder, A, Anderson, J S, Biagi, S F, Bowcock, T J V, Carroll, J L, Casse, G, Cooke, P, Donleavy, S, Dwyer, L, Hennessy, K, Huse, T, Hutchcroft, D, Jones, D, Lockwood, M, McCubbin, M, McNulty, R, Muskett, D, Noor, A, Patel, G D, Rinnert, K, Shears, T G, Smith, N A, Southern, G, Stavitski, I, Sutcliffe, P, Tobin, M, Traynor, S M, Turner, P, Whitley, M, Wormald, M, Wright, V, Bibby, J H, Brisbane, S, Brock, M, Charles, M, Cioffi, C, Gligorov, V V, Handford, T, Harnew, N, Harris, F, John, M J J, Jones, M, Libby, J, Martin, L, McArthur, I A, Muresan, R, Newby, C, Ottewell, B, Powell, A, Rotolo, N, Senanayake, R S, Somerville, L, Soroko, A, Spradlin, P, Sullivan, P, Stokes-Rees, I, Topp-Jørgensen, S, Xing, F, Wilkinson, G, Artuso, M, Belyaev, I, Blusk, S, Lefeuvre, G, Menaa, N, Menaa-Sia, R, Mountain, R, Skwarnicki, T, Stone, S, Wang, J C, Abadie, L, Aglieri-Rinella, G, Albrecht, E, André, J, Anelli, G, Arnaud, N, Augustinus, A, Bal, F, Barandela Pazos, M C, Barczyk, A, Bargiotti, M, Batista Lopes, J, Behrendt, O, Berni, S, Binko, P, Bobillier, V, Braem, André, Brarda, L, Buytaert, J, Camilleri, L, Cambpell, M, Castellani, G, Cataneo, F, Cattaneo, M, Chadaj, B, Charpentier, P, Cherukuwada, S, Chesi, Enrico Guido, Christiansen, J, Chytracek, R, Clemencic, M, Closier, J, Collins, P, Colrain, P, Cooke, O, Corajod, B, Corti, G, D'Ambrosio, C, Damodaran, B, David, C, De Capua, S, Decreuse, G, Degaudenzi, H, Dijkstra, H, Droulez, J P, Duarte Ramos, D, Dufey, J P, Dumps, R, Eckstein, D, Ferro-Luzzi, M, Fiedler, F, Filthaut, F, Flegel, W, Forty, R W, Fournier, C, Frank, M, Frei, C, Gaidioz, B, Gaspar, C, Gayde, J C, Gavillet, P, Go, A, Gracia-Abril, G, Graulich, J S, Giudici, P A, Guirao-Elias, A, Guglielmini, P, Gys, T, Hahn, F, Haider, S, Harvey, J, Hay, B, Hernando-Morata, J A, Herranz Alvarez, J, Van Herwijnen, E, Hilke, H J, Von Holtey, G, Hulsbergen, W, Jacobsson, R, Jamet, O, Joram, C, Jost, B, Kanaya, N, Knaster Refolio, J, Köstner, S, Koratzinos, M, Kristic, R, Lacarrère, D, Lasseur, C, Lastoviicka, T, Laub, M, Liko, D, Lippmann, C, Lindner, R, Losasso, M, Maier, A, Mair, K, Maley, P, Mato-Vila, P, Moine, G, Morant, J, Moritz, M, Moscicki, J, Mücke, M, Müller, H, Nakada, T, Neufeld, N, Ocariz, J, Padilla Aranda, C, Parzefall, U, Patel, M, Pepé-Altarelli, M, Piedigrossi, D, Pivk, M, Pokorski, Witold, Ponce, S, Ranjard, F, Riegler, W, Renaud, J, Roiser, S, Roy, L, Ruf, T, Ruffinoni, D, Saladino, S, Sambade Varela, A, Santinelli, R, Schmelling, S, Schmidt, B, Schneider, T, Schöning, A, Schopper, A, Séguinot, Jacques, Snoeys, W, Smith, A, Smith, A C, Somogyi, P, Stoica, R, Tejessy, W, Teubert, F, Thomas, E, Toledo-Alarcon, J, Ullaland, O, Valassi, A, Vannerem, P, Veness, R, Wicht, P, Wiedner, D, Witzeling, W, Wright, A, Wyllie, K, Ypsilantis, T, Alves, A Augusto, Andrade, L M, Barbosa-Ademarlaudo, F, Bediaga, I, Cernicchiaro, G, Guerrer, G, Lima, H P, Machado, A A, Magnin, J, Marujo, F, De Miranda, J M, Reis, A, Santos, A, Toledo, A, Akiba, K, Amato, S, de Paula, B, De Paula, L, Da Silva, T, Gandelman, M, Lopes, J H, Maréchal, B, Moraes, D, Polycarpo, E, Rodrigues, F, Ballansat, J, Bastian, Y, Boget, D, De Bonis, I, Coco, V, David, P Y, Décamp, D, Delebecque, P, Drancourt, C, Dumont-Dayot, N, Girard, C, Lieunard, B, Minard, M N, Pietrzyk, B, Rambure, T, Rospabe, G, T'Jampens, S, Ajaltouni, Z, Böhner, G, Bonnefoy, R, Borras, D, Cârloganu, C, Chanal, H, Conte, E, Cornat, R, Crouau, M, Delage, E, Deschamps, O, Henrard, P, Jacquet, P, Lacan, C, Laubser, J, Lecoq, J, Lefèvre, R, Magne, M, Martemyanov, M, Mercier, M L, Monteil, S, Niess, V, Perret, P, Reinmuth, G, Robert, A, Suchorski, S, Arnaud, K, Aslanides, E, Babel, J, Benchouk, C, Cachemiche, J P, Cogan, J, Derue, F, Dinkespiler, B, Duval, P Y, Garonne, V, Favard, S, Le Gac, R, Leon, F, Leroy, O, Liotard, P L, Marin, F, Menouni, M, Ollive, P, Poss, S, Roche, A, Sapunov, M, Tocco, L, Viaud, B, Tsaregorodtsev, A, Amhis, Y, Barrand, G, Barsuk, S, Beigbeder, C, Beneyton, R, Breton, D, Callot, O, Charlet, D, D'Almagne, B, Duarte, O, Fulda-Quenzer, F, Jacholkowska, A, Jean-Marie, B, Lefrançois, J, Machefert, F, Robbe, P, Schune, M H, Tocut, V, Videau, I, Benayoun, M, David, P, Del Buono, L, Gilles, G, Domke, M, Futterschneider, H, Ilgner, C, Kapusta, P, Kolander, M, Krause, R, Lieng, M, Nedos, M, Rudloff, K, Schleich, S, Schwierz, R, Spaan, B, Wacker, K, Warda, K, Agari, M, Bauer, C, Baumeister, D, Bulian, N, Fuchs, H P, Fallot-Burghardt, W, Glebe, T, Hofmann, W, Knöpfle, K T, Löchner, S, Ludwig, A, Maciuc, F, Sánchez-Nieto, F, Schmelling, M, Schwingenheuer, B, Sexauer, E, Smale, N J, Trunk, U, Voss, H, Albrecht, J, Bachmann, S, Blouw, J, Deissenroth, M, Deppe, H, Dreis, H B, Eisele, F, Haas, T, Hansmann-Menzemer, S, Hennenberger, S, Knopf, J, Moch, M, Perieanu, A, Rabenecker, S, Rausch, A, Rummel, C, Rusnyak, R, Schiller, M, Stange, U, Uwer, U, Walter, M, Ziegler, R, Avoni, G, Balbi, G, Bonifazi, F, Bortolotti, D, Carbone, A, D'Antone, I, Galli, D, Gregori, D, Lax, I, Marconi, U, Peco, G, Vagnoni, V, Valenti, G, Vecchi, S, Bonivento, W, Cardini, A, Cadeddu, S, De Leo, V, Deplano, C, Furcas, S, Lai, A, Oldeman, R, Raspino, D, Saitta, B, Serra, N, Baldini, W, Brusa, S, Chiozzi, S, Cotta-Ramusino, A, Evangelisti, F, Franconieri, A, Germani, S, Gianoli, A, Guoming, L, Landi, L, Malaguti, R, Padoan, C, Pennini, C, Savrié, M, Squerzanti, S, Zhao, T, Zhu, M, Bizzeti, A, Graziani, G, Lenti, M, Lenzi, M, Maletta, F, Pennazzi, S, Passaleva, G, Veltri, M, Alfonsi, M, Anelli, M, Balla, A, Battisti, A, Bencivenni, G, Campana, P, Carletti, M, Ciambrone, P, Corradi, G, Dane, E, DiVirgilio, A, De Simone, P, Felici, G, Forti, C, Gatta, M, Lanfranchi, G, Murtas, F, Pistilli, M, Poli-Lener, M, Rosellini, R, Santoni, M, Saputi, A, Sarti, A, Sciubba, A, Zossi, A, Ameri, M, Cuneo, S, Fontanelli, F, Gracco, V, Mini, G, Parodi, M, Petrolini, A, Sannino, M, Vinci, A, Alemi, M, Arnaboldi, C, Bellunato, T, Calvi, M, Chignoli, F, De Lucia, A, Galotta, G, Mazza, R, Matteuzzi, C, Musy, M, Negri, P, Perego, D, Pessina, G, Auriemma, G, Bocci, V, Buccheri, A, Chiodi, G, Di Marco, S, Iacoangeli, F, Martellotti, G, Nobrega, R, Pelosi, A, Penso, G, Pinci, D, Rinaldi, W, Rossi, A, Santacesaria, R, Satriano, C, Carboni, G, Iannilli, M, Massafferri Rodrigues, A, Messi, R, Paoluzzi, G, Sabatino, G, Santovetti, E, Satta, A, Amoraal, J, van Apeldoorn, G, Arink, R, Van Bakel, N, Band, H, Bauer, T, Berkien, A, van Beuzekom, M, Bos, E, Bron, C, Ceelie, L, Doets, M, Van der Eijk, R, Fransen, J P, de Groen, P, Gromov, V, Hierck, R, Homma, J, Hommels, B, Hoogland, W, Jans, E, Jansen, F, Jansen, L, Jaspers, M, Kaan, B, Köne, B, Koopstra, J, Kroes, F, Kraan, M, Langedijk, J, Merk, M, Mos, S, Munneke, B, Palacios, J, Papadelis, A, Pellegrino, A, Van Petten, O, du Pree, T, Roeland, E, Rückstuhl, W, Schimmel, A, Schuijlenburg, H, Sluijk, T, Spelt, J, Stolte, J, Terrier, H, Tuning, N, Van Lysebetten, A, Vankov, P, Verkooijen, J, Verlaat, B, Vink, W, De Vries, H, Wiggers, L, Ybeles Smit, G, Zaitsev, N, Zupan, M, Zwart, A, van den Brand, J, Bulten, H J, De Jong, M, Ketel, T, Klous, S, Kos, J, M'charek, B, Mul, F, Raven, G, Simioni, E, Cheng, J, Dai, G, Deng, Z, Gao, Y, Gong, G, Gong, H, He, J, Hou, L, Li, J, Qian, W, Shao, B, Xue, T, Yang, Z, Zeng, M, Muryn, B, Ciba, K, Oblakowska-Mucha, A, Blocki, J, Galuszka, K, Hajduk, L, Michalowski, J, Natkaniec, Z, Polok, G, Stodulski, M, Witek, M, Brzozowski, K, Chlopik, A, Gawor, P, Guzik, Z, Nawrot, A, Srednicki, A, Syryczynski, K, Szczekowski, M, Constantin, F, Cristian, P, Mihon, G, Pavel, C, Stoica, S, Filippov, S, Gavrilov, Yu, Golyshkin, L, Gushchin, E, Karavichev, O, Klubakov, V, Kravchuk, L, Kutuzov, V, Laptev, S, Popov, S, Arefev, A, Bobchenko, B, Dolgoshein, V, Egorychev, V, Golutvin, A, Gushchin, O, Konoplyannikov, A, Korolko, I, Kvaratskheliia, T, Machikhiliyan, I, Malyshev, S, Mayatskaya, E, Prokudin, M, Rusinov, D, Rusinov, V, Shatalov, P, Shchutska, L, Tarkovskiy, E, Tayduganov, A, Voronchev, K, Zhiryakova, O, Bobrov, A, Bondar, A, Eidelman, S, Kozlinsky, A, Shekhtman, L, Belous, K S, Dzhelyadin, R I, Gelitsky, Yu V, Gouz, Yu P, Kachnov, K G, Kobelev, A S, Matveev, V D, Novikov, V P, Obraztsov, V F, Ostankov, A P, Romanovsky, V I, Rykalin, V I, Soldatov, A P, Soldatov, M M, Tchernov, E N, Yushchenko, O P, Bochin, B, Bondar, N, Fedorov, O, Golovtsov, V, Guets, S, Kashchuk, A, Lazarev, V, Maev, O, Neustroev, P, Sagidova, N, Spiridenkov, E, Volkov, S, Vorobyev, An, Vorobyov, A, Aguiló, E, Bota, S, Calvo, M, Comerma, A, Cano, X, Diéguez, A, Herms, A, López, E, Luengo, S, Garra, J, Garrido, L, Gascón, D, Gaspar de Valenzuela, A, González, C, Graciani, R, Graugès-Pous, E, Pérez-Calero Yzquierdo, A, Picatoste, E, Riera, J, Roselló, M, Ruiz, H, Vilasís, X, Xirgu, X, Adeva, B, Cid Vidal, X, Martenez Santos, D, Esperante-Pereira, D, Fungueirino-Pazos, J L, Gallas Torreira, A, Lois-Gómez, C, Pazos-Alvarez, A, Pérez-Trigo, E, Pló-Casasus, M, Rodriguez Cobo, C, Rodriguez Perez, P, Saborido, J J, Seco, M, Vázquez-Regueiro, P, Bartalini, P, Bay, A, Bettler, M O, Blanc, F, Borel, J, Carron, B, Currat, C, Conti, G, Dormond, O, Ermoline, Y, Fauland, P, Fernández, L, Frei, R, Gagliardi, G, Gueissaz, N, Haefeli, G, Hicheur, A, Jacoby, C, Jalocha, P, Jiménez-Otero, S, Hertig, J P, Knecht, M, Legger, F, Locatelli, L, Moser, J R, Needham, M, Nicolas, L, Perrin-Giacomin, A, Perroud, Jean-Pierre, Potterat, C, Ronga, F, Schneider, O, Schietinger, T, Steele, D, Studer, L, Tareb, M, Tran, M T, van Hunen, J, Vervink, K, Villa, S, Zwahlen, N, Bernet, R, Buchler, A, Gassner, J, Lehner, F, Sakhelashvili, T, Salzmann, C, Sievers, P, Steiner, S, Steinkamp, O, Straumann, U, Van Tilburg, J, Vollhardt, A, Volyanskyy, D, Ziegler, M, Dovbnya, A, Ranyuk, Yu, Shapoval, I, Borisova, M, Iakovenko, V, Kyva, V, Kovalchuk, O, Okhrimenko, O, Pugatch, V, Pylypchenko, Yu, Adinolfi, M, Brook, N H, Head, R D, Imong, J P, Lessnoff, K A, Metlica, F C D, Muir, A J, Rademacker, J H, Solomin, A, Szczypka, P M, Barham, C, Buszello, C, Dickens, J, Gibson, V, Haines, S, Harrison, K, Jones, C R, Katvars, S, Kerzel, U, Lazzeroni, C, Li, Y Y, Rogers, G, Storey, J, Skottowe, H, Wotton, S A, Adye, T J, Densham, C J, Easo, S, Franek, B, Loveridge, P, Morrow, D, Morris, J V, Nandakumar, R, Nardulli, J, Papanestis, A, Patrick, G N, Ricciardi, S, Woodward, M L, Zhang, Z, Chamonal, R J U, Clark, P J, Clarke, P, Eisenhardt, S, Gilardi, N, Khan, A, Kim, Y M, Lambert, Robert W, Lawrence, J, Main, A, McCarron, J, Mclean, C, Muheim, F, Osorio-Oliveros, A F, Playfer, S, Styles, N, Xie, Y, Bates, A, Carson, L, da Cunha Marinho, F, Doherty, F, Eklund, L, Gersabeck, M, Haddad, L, Macgregor, A A, Melone, J, McEwan, F, Petrie, D M, Paterson, S K, Parkes, C, Pickford, A, Rakotomiaramanana, B, Rodrigues, E, Saavedra, A F, Soler, F J P, Szumlak, T, Viret, S, Allebone, L, Awunor, O, Back, J, Barber, G, Barnes, C, Cameron, B, Clark, D, Clark, I, Dornan, Peter John, Duane, A, Eames, C, Egede, U, Girone, M, Greenwood, S, Hallam, R, Hare, R, Howard, A, Jolly, S, Kasey, V, Khaleeq, M, Koppenburg, P, Miller, D, Plackett, R, Price, D, Reece, W, Savage, P, Savidge, T, Simmons, B, Vidal-Sitjes, G, Websdale, D M, Affolder, A, Anderson, J S, Biagi, S F, Bowcock, T J V, Carroll, J L, Casse, G, Cooke, P, Donleavy, S, Dwyer, L, Hennessy, K, Huse, T, Hutchcroft, D, Jones, D, Lockwood, M, McCubbin, M, McNulty, R, Muskett, D, Noor, A, Patel, G D, Rinnert, K, Shears, T G, Smith, N A, Southern, G, Stavitski, I, Sutcliffe, P, Tobin, M, Traynor, S M, Turner, P, Whitley, M, Wormald, M, Wright, V, Bibby, J H, Brisbane, S, Brock, M, Charles, M, Cioffi, C, Gligorov, V V, Handford, T, Harnew, N, Harris, F, John, M J J, Jones, M, Libby, J, Martin, L, McArthur, I A, Muresan, R, Newby, C, Ottewell, B, Powell, A, Rotolo, N, Senanayake, R S, Somerville, L, Soroko, A, Spradlin, P, Sullivan, P, Stokes-Rees, I, Topp-Jørgensen, S, Xing, F, Wilkinson, G, Artuso, M, Belyaev, I, Blusk, S, Lefeuvre, G, Menaa, N, Menaa-Sia, R, Mountain, R, Skwarnicki, T, Stone, S, Wang, J C, Abadie, L, Aglieri-Rinella, G, Albrecht, E, André, J, Anelli, G, Arnaud, N, Augustinus, A, Bal, F, Barandela Pazos, M C, Barczyk, A, Bargiotti, M, Batista Lopes, J, Behrendt, O, Berni, S, Binko, P, Bobillier, V, Braem, André, Brarda, L, Buytaert, J, Camilleri, L, Cambpell, M, Castellani, G, Cataneo, F, Cattaneo, M, Chadaj, B, Charpentier, P, Cherukuwada, S, Chesi, Enrico Guido, Christiansen, J, Chytracek, R, Clemencic, M, Closier, J, Collins, P, Colrain, P, Cooke, O, Corajod, B, Corti, G, D'Ambrosio, C, Damodaran, B, David, C, De Capua, S, Decreuse, G, Degaudenzi, H, Dijkstra, H, Droulez, J P, Duarte Ramos, D, Dufey, J P, Dumps, R, Eckstein, D, Ferro-Luzzi, M, Fiedler, F, Filthaut, F, Flegel, W, Forty, R W, Fournier, C, Frank, M, Frei, C, Gaidioz, B, Gaspar, C, Gayde, J C, Gavillet, P, Go, A, Gracia-Abril, G, Graulich, J S, Giudici, P A, Guirao-Elias, A, Guglielmini, P, Gys, T, Hahn, F, Haider, S, Harvey, J, Hay, B, Hernando-Morata, J A, Herranz Alvarez, J, Van Herwijnen, E, Hilke, H J, Von Holtey, G, Hulsbergen, W, Jacobsson, R, Jamet, O, Joram, C, Jost, B, Kanaya, N, Knaster Refolio, J, Köstner, S, Koratzinos, M, Kristic, R, Lacarrère, D, Lasseur, C, Lastoviicka, T, Laub, M, Liko, D, Lippmann, C, Lindner, R, Losasso, M, Maier, A, Mair, K, Maley, P, Mato-Vila, P, Moine, G, Morant, J, Moritz, M, Moscicki, J, Mücke, M, Müller, H, Nakada, T, Neufeld, N, Ocariz, J, Padilla Aranda, C, Parzefall, U, Patel, M, Pepé-Altarelli, M, Piedigrossi, D, Pivk, M, Pokorski, Witold, Ponce, S, Ranjard, F, Riegler, W, Renaud, J, Roiser, S, Roy, L, Ruf, T, Ruffinoni, D, Saladino, S, Sambade Varela, A, Santinelli, R, Schmelling, S, Schmidt, B, Schneider, T, Schöning, A, Schopper, A, Séguinot, Jacques, Snoeys, W, Smith, A, Smith, A C, Somogyi, P, Stoica, R, Tejessy, W, Teubert, F, Thomas, E, Toledo-Alarcon, J, Ullaland, O, Valassi, A, Vannerem, P, Veness, R, Wicht, P, Wiedner, D, Witzeling, W, Wright, A, Wyllie, K, and Ypsilantis, T

49. The LHCb detector at the LHC

Author

Augusto Alves Jr., A., M. Andrade Filho, L., F. Barbosa, A., Bediaga, I., Cernicchiaro, G., Guerrer, G., P. Lima Jr, H., A. Machado, A., Magnin, J., Marujo, F., M. De Miranda, J., Reis, A., Santos, A., Toledo, A., Akiba, K., Amato, S., De Paula, B., De Paula, L., Da Silva, T., Gandelman, M., H. Lopes, J., Maréchal, B., Moraes, D., Polycarpo, E., Rodrigues, F., Ballansat, J., Bastian, Y., Boget, D., De Bonis, I., Coco, V., David, P.Y., Decamp, D., Delebecque, P., Drancourt, C., Dumont-Dayot, N., Girard, C., Lieunard, B., Minard, M.N., Pietrzyk, B., Rambure, T., Rospabe, G., T'Jampens, S., Ajaltouni, Z., Bohner, G., Bonnefoy, R., Borras, D., Carloganu, C., Chanal, H., Conte, E., Cornat, R., Crouau, M., Delage, E., Deschamps, O., Henrard, P., Jacquet, P., Lacan, C., Laubser, J., Lecoq, J., Lefèvre, R., Magne, M., Martemiyanov, M., Mercier, M.-L., Monteil, S., Niess, V., Perret, P., Reinmuth, G., Robert, A., Suchorski, S., Arnaud, K., Aslanides, E., Babel, J., Benchouk, C., Cachemiche, J.-P., Cogan, J., Derue, F., Dinkespiler, B., Duval, P.-Y., Garonne, V., Favard, S., Le Gac, R., Leon, F., Leroy, O., Liotard, P.-L., Marin, F., Menouni, M., Ollive, P., Poss, S., Roche, A., Sapunov, M., Tocco, L., Viaud, B., Tsaregorodtsev, A., Amhis, Y., Barrand, G., Barsuk, S., Beigbeder, C., Beneyton, R., Breton, D., Callot, O., Charlet, D., D'Almagne, B., Duarte, O., Fulda-Quenzer, F., Jacholkowska, A., Jean-Marie, B., Lefrancois, J., Machefert, F., Robbe, P., Schune, M.-H., Tocut, V., Videau, I., Benayoun, M., David, P., Del. Buono, L., Gilles, G., Domke, M., Futterschneider, H., Ilgner, Ch., Kapusta, P., Kolander, M., Krause, R., Lieng, M., Nedos, M., Rudloff, K., Schleich, S., Schwierz, R., Spaan, B., Wacker, K., Warda, K., Agari, M., Bauer, C., Baumeister, D., Bulian, N., P. Fuchs, H., Fallot-Burghardt, W., Glebe, T., Hofmann, W., T. Knöpfle, K., Löchner, S., Ludwig, A., Maciuc, F., Sanchez. Nieto, F., Schmelling, M., Schwingenheuer, B., Sexauer, E., J. Smale, N., Trunk, U., Voss, H., Albrecht, J., Bachmann, S., Blouw, J., Deissenroth, M., Deppe, H., B. Dreis, H., Eisele, F., Haas, T., Hansmann-Menzemer, S., Hennenberger, S., Knopf, J., Moch, M., Perieanu, A., Rabenecker, S., Rausch, A., Rummel, C., Rusnyak, R., Schiller, M., Stange, U., Uwer, U., Walter, M., Ziegler, R., Avoni, G., Balbi, G., Bonifazi, F., Bortolotti, D., Carbone, A., D'Antone, I., Galli, D., Gregori, D., Lax, I., Marconi, U., Peco, G., Vagnoni, V., Valenti, G., Vecchi, S., Bonivento, W., Cardini, A., Cadeddu, S., Deleo, V., Deplano, C., Furcas, S., Lai, A., Oldeman, R., Raspino, D., Saitta, B., Serra, N., Baldini, W., Brusa, S., Chiozzi, S., Cotta. Ramusino, A., Evangelisti, F., Franconieri, A., Germani, S., Gianoli, A., Guoming, L., Landi, L., Malaguti, R., Padoan, C., Pennini, C., Savriè, M., Squerzanti, S., Zhao, T., Zhu, M., Bizzeti, A., Graziani, G., Lenti, M., Lenzi, M., Maletta, F., Pennazzi, S., Passaleva, G., Veltri, M., Alfonsi, M., Anelli, M., Balla, A., Battisti, A., Bencivenni, G., Campana, P., Carletti, M., Ciambrone, P., Corradi, G., Dané, E., Divirgilio, A., Desimone, P., Felici, G., Forti, C., Gatta, M., Lanfranchi, G., Murtas, F., Pistilli, M., Poli. Lener, M., Rosellini, R., Santoni, M., Saputi, A., Sarti, A., Sciubba, A., Zossi, A., Ameri, M., Cuneo, S., Fontanelli, F., Gracco, V., Miní, G., Parodi, M., Petrolini, A., Sannino, M., Vinci, A., Alemi, M., Arnaboldi, C., Bellunato, T., Calvi, M., Chignoli, F., De Lucia, A., Galotta, G., Mazza, R., Matteuzzi, C., Musy, M., Negri, P., Perego, D., Pessina, G., Auriemma, G., Bocci, V., Buccheri, A., Chiodi, G., Di Marco, S., Iacoangeli, F., Martellotti, G., Nobrega, R., Pelosi, A., Penso, G., Pinci, D., Rinaldi, W., Rossi, A., Santacesaria, R., Satriano, C., Carboni, G., Iannilli, M., Massafferri Rodrigues, A., Messi, R., Paoluzzi, G., Sabatino, G., Santovetti, E., Satta, A., Amoraal, J., Van Apeldoorn, G., Arink, R., Van Bakel, N., Band, H., Bauer, Th., Berkien, A., Van Beuzekom, M., Bos, E., Bron, Ch., Ceelie, L., Doets, M., Van Der Eijk, R., Fransen, J.-P., De Groen, P., Gromov, V., Hierck, R., Homma, J., Hommels, B., Hoogland, W., Jans, E., Jansen, F., Jansen, L., Jaspers, M., Kaan, B., Koene, B., Koopstra, J., Kroes, F., Kraan, M., Langedijk, J., Merk, M., Mos, S., Munneke, B., Palacios, J., Papadelis, A., Pellegrino, A., Van Petten, O., Du. Pree, T., Roeland, E., Ruckstuhl, W., Schimmel, A., Schuijlenburg, H., Sluijk, T., Spelt, J., Stolte, J., Terrier, H., Tuning, N., Van Lysebetten, A., Vankov, P., Verkooijen, J., Verlaat, B., Vink, W., De Vries, H., Wiggers, L., Ybeles Smit, G., Zaitsev, N., Zupan, M., Zwart, A., Van Den Brand, J., J. Bulten, H., De Jong, M., Ketel, T., Klous, S., Kos, J., M'Charek, B., Mul, F., Raven, G., Simioni, E., Cheng, J., Dai, G., Deng, Z., Gao, Y., Gong, G., Gong, H., He, J., Hou, L., Li, J., Qian, W., Shao, B., Xue, T., Yang, Z., Zeng, M., Muryn, B., Ciba, K., Oblakowska-Mucha, A., Blocki, J., Galuszka, K., Hajduk, L., Michalowski, J., Natkaniec, Z., Polok, G., Stodulski, M., Witek, M., Brzozowski, K., Chlopik, A., Gawor, P., Guzik, Z., Nawrot, A., Srednicki, A., Syryczynski, K., Szczekowski, M., Constantin, F., Cristian, P., Mihon, Gh., Pavel, C., Stoica, S., Filippov, S., Gavrilov, Yu., Golyshkin, L., Gushchin, E., Karavichev, O., Klubakov, V., Kravchuk, L., Kutuzov, V., Laptev, S., Popov, S., Aref'Ev, A., Bobchenko, B., Dolgoshein, V., Egorychev, V., Golutvin, A., Gushchin, O., Konoplyannikov, A., Korolko, I., Kvaratskheliya, T., Machikhiliyan, I., Malyshev, S., Mayatskaya, E., Prokudin, M., Rusinov, D., Rusinov, V., Shatalov, P., Shchutska, L., Tarkovskiy, E., Tayduganov, A., Voronchev, K., Zhiryakova, O., Bobrov, A., Bondar, A., Eidelman, S., Kozlinsky, A., Shekhtman, L., S. Beloous, K., I. Dzhelyadin, R., V. Gelitsky, Yu., P. Gouz, Yu., G. Kachnov, K., S. Kobelev, A., D. Matveev, V., P. Novikov, V., F. Obraztsov, V., P. Ostankov, A., I. Romanovsky, V., I. Rykalin, V., P. Soldatov, A., M. Soldatov, M., N. Tchernov, E., P. Yushchenko, O., Bochin, B., Bondar, N., Fedorov, O., Golovtsov, V., Guets, S., Kashchuk, A., Lazarev, V., Maev, O., Neustroev, P., Sagidova, N., Spiridenkov, E., Volkov, S., Vorobyev, An., Vorobyov, A., Aguilo, E., Bota, S., Calvo, M., Comerma, A., Cano, X., Dieguez, A., Herms, A., Lopez, E., Luengo, S., Garra, J., Garrido, Ll., Gascon, D., Gaspar De Valenzuela, A., Gonzalez, C., Graciani, R., Grauges, E., Perez. Calero, A., Picatoste, E., Riera, J., Rosello, M., Ruiz, H., Vilasis, X., Xirgu, X., Adeva, B., Cid. Vidal, X., MartÉnez Santos, D., Esperante Pereira, D., L. Fungueiriño Pazos, J., Gallas Torreira, A., Lois Gómez, C., Pazos Alvarez, A., Pérez Trigo, E., Pló Casasús, M., Rodriguez Cobo, C., Rodríguez Pérez, P., J. Saborido, J., Seco, M., Vazquez Regueiro, P., Bartalini, P., Bay, A., Bettler, M.-O., Blanc, F., Borel, J., Carron, B., Currat, C., Conti, G., Dormond, O., Ermoline, Y., Fauland, P., Fernandez, L., Frei, R., Gagliardi, G., Gueissaz, N., Haefeli, G., Hicheur, A., Jacoby, C., Jalocha, P., Jimenez-Otero, S., Hertig, J.-P., Knecht, M., Legger, F., Locatelli, L., Moser, J.-R., Needham, M., Nicolas, L., Perrin-Giacomin, A., Perroud, J.-P., Potterat, C., Ronga, F., Schneider, O., Schietinger, T., Steele, D., Studer, L., Tareb, M., T. Tran, M., Van Hunen, J., Vervink, K., Villa, S., Zwahlen, N., Bernet, R., Büchler, A., Gassner, J., Lehner, F., Sakhelashvili, T., Salzmann, C., Sievers, P., Steiner, S., Steinkamp, O., Straumann, U., Van Tilburg, J., Vollhardt, A., Volyanskyy, D., Ziegler, M., Dovbnya, A., Ranyuk, Yu., Shapoval, I., Borisova, M., Iakovenko, V., Kyva, V., Kovalchuk, O., Okhrimenko, O., Pugatch, V., Pylypchenko, Yu., Adinolfi, M., H. Brook, N., D. Head, R., P. Imong, J., A. Lessnoff, K., C. D. Metlica, F., J. Muir, A., H. Rademacker, J., Solomin, A., M. Szczypka, P., Barham, C., Buszello, C., Dickens, J., Gibson, V., Haines, S., Harrison, K., R. Jones, C., Katvars, S., Kerzel, U., Lazzeroni, C., Y. Li, Y., Rogers, G., Storey, J., Skottowe, H., A. Wotton, S., J. Adye, T., J. Densham, C., Easo, S., Franek, B., Loveridge, P., Morrow, D., V. Morris, J., Nandakumar, R., Nardulli, J., Papanestis, A., N. Patrick, G., Ricciardi, S., L. Woodward, M., Zhang, Z., J. U. Chamonal, R., J. Clark, P., Clarke, P., Eisenhardt, S., Gilardi, N., Khan, A., M. Kim, Y., Lambert, R., Lawrence, J., Main, A., Mccarron, J., Mclean, C., Muheim, F., F. Osorio-Oliveros, A., Playfer, S., Styles, N., Xie, Y., Bates, A., Carson, L., Da Cunha Marinho, F., Doherty, F., Eklund, L., Gersabeck, M., Haddad, L., A. Macgregor, A., Melone, J., Mcewan, F., M. Petrie, D., K. Paterson, S., Parkes, C., Pickford, A., Rakotomiaramanana, B., Rodrigues, E., F. Saavedra, A., J. P. Soler, F., Szumlak, T., Viret, S., Allebone, L., Awunor, O., Back, J., Barber, G., Barnes, C., Cameron, B., Clark, D., Clark, I., Dornan, P., Duane, A., Eames, C., Egede, U., Girone, M., Greenwood, S., Hallam, R., Hare, R., Howard, A., Jolly, S., Kasey, V., Khaleeq, M., Koppenburg, P., Miller, D., Plackett, R., Price, D., Reece, W., Savage, P., Savidge, T., Simmons, B., Vidal-Sitjes, G., Websdale, D., Affolder, A., S. Anderson, J., F. Biagi, S., J. V. Bowcock, T., L. Carroll, J., Casse, G., Cooke, P., Donleavy, S., Dwyer, L., Hennessy, K., Huse, T., Hutchcroft, D., Jones, D., Lockwood, M., Mccubbin, M., Mcnulty, R., Muskett, D., Noor, A., D. Patel, G., Rinnert, K., Shears, T., A. Smith, N., Southern, G., Stavitski, I., Sutcliffe, P., Tobin, M., M. Traynor, S., Turner, P., Whitley, M., Wormald, M., Wright, V., H. Bibby, J., Brisbane, S., Brock, M., Charles, M., Cioffi, C., V. Gligorov, V., Handford, T., Harnew, N., Harris, F., J. J. John, M., Jones, M., Libby, J., Martin, L., A. Mcarthur, I., Muresan, R., Newby, C., Ottewell, B., Powell, A., Rotolo, N., S. Senanayake, R., Somerville, L., Soroko, A., Spradlin, P., Sullivan, P., Stokes-Rees, I., Topp-Jorgensen, S., Xing, F., Wilkinson, G., Artuso, M., Belyaev, I., Blusk, S., Lefeuvre, G., Menaa, N., Menaa-Sia, R., Mountain, R., Skwarnicki, T., Stone, S., C. Wang, J., Abadie, L., Aglieri-Rinella, G., Albrecht, E., André, J., Anelli, G., Arnaud, N., Augustinus, A., Bal, F., C. Barandela Pazos, M., Barczyk, A., Bargiotti, M., Batista. Lopes, J., Behrendt, O., Berni, S., Binko, P., Bobillier, V., Braem, A., Brarda, L., Buytaert, J., Camilleri, L., Cambpell, M., Castellani, G., Cataneo, F., Cattaneo, M., Chadaj, B., Charpentier, P., Cherukuwada, S., Chesi, E., Christiansen, J., Chytracek, R., Clemencic, M., Closier, J., Collins, P., Colrain, P., Cooke, O., Corajod, B., Corti, G., D'Ambrosio, C., Damodaran, B., David, C., De Capua, S., Decreuse, G., Degaudenzi, H., Dijkstra, H., Droulez, J.-P., Duarte Ramos, D., P. 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Soler, F., Szumlak, T., Viret, S., Allebone, L., Awunor, O., Back, J., Barber, G., Barnes, C., Cameron, B., Clark, D., Clark, I., Dornan, P., Duane, A., Eames, C., Egede, U., Girone, M., Greenwood, S., Hallam, R., Hare, R., Howard, A., Jolly, S., Kasey, V., Khaleeq, M., Koppenburg, P., Miller, D., Plackett, R., Price, D., Reece, W., Savage, P., Savidge, T., Simmons, B., Vidal-Sitjes, G., Websdale, D., Affolder, A., S. Anderson, J., F. Biagi, S., J. V. Bowcock, T., L. Carroll, J., Casse, G., Cooke, P., Donleavy, S., Dwyer, L., Hennessy, K., Huse, T., Hutchcroft, D., Jones, D., Lockwood, M., Mccubbin, M., Mcnulty, R., Muskett, D., Noor, A., D. Patel, G., Rinnert, K., Shears, T., A. Smith, N., Southern, G., Stavitski, I., Sutcliffe, P., Tobin, M., M. Traynor, S., Turner, P., Whitley, M., Wormald, M., Wright, V., H. Bibby, J., Brisbane, S., Brock, M., Charles, M., Cioffi, C., V. Gligorov, V., Handford, T., Harnew, N., Harris, F., J. J. John, M., Jones, M., Libby, J., Martin, L., A. 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Vila, P., Moine, G., Morant, J., Moritz, M., Moscicki, J., Muecke, M., Mueller, H., Nakada, T., Neufeld, N., Ocariz, J., Padilla Aranda, C., Parzefall, U., Patel, M., Pepe-Altarelli, M., Piedigrossi, D., Pivk, M., Pokorski, W., Ponce, S., Ranjard, F., Riegler, W., Renaud, J., Roiser, S., Roy, L., Ruf, T., Ruffinoni, D., Saladino, S., Sambade Varela, A., Santinelli, R., Schmelling, S., Schmidt, B., Schneider, T., Schöning, A., Schopper, A., Seguinot, J., Snoeys, W., Smith, A., C. Smith, A., Somogyi, P., Stoica, R., Tejessy, W., Teubert, F., Thomas, E., Toledo Alarcon, J., Ullaland, O., Valassi, A., Vannerem, P., Veness, R., Wicht, P., Wiedner, D., Witzeling, W., Wright, A., Wyllie, K., and Ypsilantis, T.

Abstract

The LHCb experiment is dedicated to precision measurements of CP violation and rare decays of B hadrons at the Large Hadron Collider (LHC) at CERN (Geneva). The initial configuration and expected performance of the detector and associated systems, as established by test beam measurements and simulation studies, is described.

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