16 results on '"Morozova DA"'
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2. Plants of residential and industrial zones of Cherepovets
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Serova Karina, Baboshina Polina, Troshin Dmitriy, Markelova Dina, Morozova Daria, and Pluzhnikova Anna
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Environmental sciences ,GE1-350 - Abstract
The research was carried out in 2021-2022 in the city of Cherepovets, Vologda region. The aim of the study was to assess the species composition of plants within the administrative boundaries of Cherepovets and to propose measures to restore the biodiversity of the study area. The level of urbanization of the territory is estimated as moderate. For the first time the data on the current species composition of plants of residential and industrial zones of the city of Cherepovets were obtained. In particular, species from the Red Book list as well as those in need of biological control were identified.
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- 2023
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3. Condition of tiny dogs’ homeostasis diagnosed having 'spuria polyodontia'
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Morozova Darya D., Krasnikov Alexander V., Krasnikova Ekaterina S., Annikov Vyacheslav V., and Galimzyanov Ilsur G.
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Microbiology ,QR1-502 ,Physiology ,QP1-981 ,Zoology ,QL1-991 - Abstract
Nowadays special attention must be paid to pathology associated with the violation of the change of milk teeth to permanent of dogs of dwarf breeds. This fact is confirmed by the results of a statistical analysis of appeals from dog owners to specialized dental care at the “Veterinary Hospital”: 33 % of the animals were diagnosed with “false polyodontics” a general increase in the number of teeth due to non-temporal loss. In the literature, it is noted that the hormones of the thyroid and parathyroid glands, sex hormones regulate the exchange of calcium and phosphorus in the blood, thereby affecting the speed of tooth changes and the degree of bone mineralization. As a result of the research, the authors determined the features of hormonal and mineral homeostasis of the body during the period of teeth change in dogs of dwarf breeds at the age of 6 months in the blood serum, characterized by the thyroid gland profile, sex hormones – at the lower reference values, increased phosphorus and calcium levels.
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- 2020
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4. The Gamma-ray Activity of the high-z Quasar 0836+71
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Jorstad Svetlana, Marscher Alan, Larionov Valeri, Gómez José L., Agudo Iván, Angelakis Emmanouil, Casadio Carolina, Gurwell Mark, Hovatta Talvikki, Joshi Manasvita, Fuhrmann Lars, Karamanavis Vassilis, Lähteenmäki Anne, Molina Sol, Morozova Daria, Myserlis Ioannis, Troitsky Ivan, Ungerechts Hans, and Anton Zensus J.
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Physics ,QC1-999 - Abstract
The Fermi LAT detected an increase in γ-ray activity of the quasar 0836+710 (z=2.17) in Spring 2011 that culminated in a sharp γ-ray flare at the end of 2011 when the source reached a flux of 2.9×10−6 phot s−1cm−2 at 0.1-200 GeV. We monitor the quasar at optical wavelengths in photometric and polarimetric modes, at millimeter and centimeter wavelengths, and with the VLBA at 43 GHz. The optical brightness of the quasar increased by ~0.5 mag in R band and the degree of polarization oscillated between ~1% and ~6% during the highest γ-ray state, while the position angle of polarization rotated by ~300°. We have identified in the VLBA images a strong, highly polarized component that moves with an apparent speed of ~20 c. The component emerged from the core in the beginning of the γ-ray event and reached a flux maximum at the peak of the γ-ray outburst. We present the results of a correlative analysis of variations at different wavelengths along with the kinematic parameters of the parsec scale jet. We discuss the location of the high γ-ray emission in the relativistic jet, as well as the emission mechanisms responsible for γ-ray production.
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- 2013
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5. MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012
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Aleksic, J., Ansoldi, S., Antonelli, L. A., Antoranz, P., Babic, A., Bangale, P., Bednarek, W., Bernardini, E., Biland, A., Blanch, O., Bonnefoy, S., Contreras, J. L., Paneque, D., Paoletti, R., Cortina, J., Paredes, J. M., Covino, S., Paredes-Fortuny, X., Da, Vela P., Partini, S., Dazzi, F., Persic, M., De, Angelis A., Prada, F., De, Caneva G., PradaMoroni, P. G., De, Lotto B., Prandini, E., Delgado, Mendez C., Preziuso, S., Doert, M., Bonnoli, G., Dominguez, A., Puljak, I., Reinthal, R., Dominis, Prester D., Rhode, W., Dorner, D., Ribo, M., Doro, M., Rico, J., Einecke, S., Eisenacher, D., Elsaesser, D., Farina, E., Ferenc, D., Fonseca, M. V., Font, L., Frantzen, K., Fruck, C., Garcia, Lopez R. J., Rodriguez, Garcia J., Garczarczyk, M., Garrido, Terrats D., Gaug, M., Godinovic, N., Gonzalez, Munoz A., Gozzini, S. R., Hadasch, D., Herrera, J., Herrero, A., Rugamer, S., Hildebrand, D., Hose, J., Hrupec, D., Idec, W., Kadenius, V., Kellermann, H., Kodani, K., Konno, Y., Krause, J., Kubo, H., Saggion, A., Kushida, J., La, Barbera A., Lelas, D., Lewandowska, N., Lindfors, E., Lombardi, S., Lopez, M., Lopez-Coto, R., Lopez-Oramas, A., Lorenz, E., Saito, T., Lozano, I., Makariev, M., Mallot, K., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Marcote, B., Mariotti, M., Martinez, M., Saito, K., Mazin, D., Menzel, U., Meucci, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Munar-Adrover, P., Nakajima, D., Niedzwiecki, A., Nilsson, K., Borracci, F., Nishijima, K., Noda, K., Nowak, N., Orito, R., Overkemping, A., Paiano, S., Palatiello, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shore, S. N., Sillanpaa, A., Sitarek, J., Snidaric, I., Sobczynska, D., Bretz, T., Spanier, F., Stamatescu, V., Stamerra, A., Steinbring, T., Storz, J., Strzys, M., Sun, S., Suric, T., Takalo, L., Takami, H., Carmona, E., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Thaele, J., Tibolla, O., Torres, D. F., Toyama, T., Treves, A., Carosi, A., Uellenbeck, M., Vogler, P., Wagner, R. M., Zandanel, F., Zanin, R., Lucarelli, F., Pittori, C., Vercellone, S., Verrecchia, F., Buson, S., Carreto, Fidalgo D., D'Ammando, F., Stawarz, Lukasz, Colin, P., Colombo, E., Hayashida, Masaaki, Barres, de Almeida U., Barrio, J. A., Becerra, Gonzalez J., Department of Radio Science and Engineering, Aalto-yliopisto, Aalto University, Aleksic J, Ansoldi S, Antonelli LA, Antoranz P, Babic A, Bangale P, de Almeida UB, Barrio JA, Gonzalez JB, Bednarek W, Bernardini E, Biland A, Blanch O, Bonnefoy S, Bonnoli G, Borracci F, Bratz T, Carmona E, Carosi A, Fidalgo DC, Colin P, Colombo E, Contreras JL, Cortina I, Covino S, Da Vela P, Dazzi F, De Angelis A, De Caneva G, De Lotto B, Mendez CD, Doert M, Dominguez A, Presters DD, Dorner D, Doro M, Einecke S, Eisenacher D, Elsaesser D, Farina E, Ferenc D, Fonseca MV, Font L, Frantzen K, Fruck C, Lopez RJG, Garczarczyk M, Terrats DG, Gaug M, Godinovic N, Munoz AG, Gozzini SR, Hadasch D, Hayashida M, Herrera J, Herrero A, Hildebrand D, Hose J, Hrupec D, Idec W, Kadenius V, Kellermann H, Kodani K, Konno Y, Krause J, Kubo H, Kushida J, La Barbera A, Lelas D, Lewandowska N, Lindfors E, Lombardi S, Lopez M, Lopez-Coto R, Lopez-Oramas A, Lorenz E, Lozano I, Makariev M, Mallotw K, Maneva G, Mankuzhiyil N, Mannheim K, Maraschi L, Marcote B, Mariotti M, Martinez M, Mazin D, Menzel U, Meucci M, Miranda JM, Mirzoyan R, Moralejo A, Munar-Adrover P, Nakajima D, Niedzwiecki A, Nilsson K, Nishijima K, Noda K, Nowak N, Orito R, Overkemping A, Paiano S, Palatiello M, Paneque D, Paoletti R, Paredes JM, Paredes-Fortuny X, Partini S, Persic M, Prada F, Moroni PGP, Prandini E, Preziuso S, Puljak I, Reinthal R, Rhode W, Ribo M, Rico J, Garcia JR, Rugamer S, Saggion A, Saito T, Saito K, Satalecka K, Scalzotto V, Scapin V, Schultz C, Schweizer T, Shore SN, Sillanpaa A, Sitarek J, Snidaric I, Sobczynska D, Spanier F, Stamatescu V, Stamerra A, Steinbring T, Storz J, Strzys M, Sun S, Suric T, Takalo L, Takami H, Tavecchio F, Temnikov P, Terzic T, Tescaro D, Teshima M, Thaele J, Tibolla O, Torres DF, Toyama T, Treves A, Uellenbeck M, Vogler P, Wagner RM, Zandanel F, Zanin R, Lucarelli F, Pittori C, Vercellone S, Verrecchia F, Buson S, DAmmando F, Stawarz L, Giroletti M, Orienti M, Mundell C, Steele I, Zarpudin B, Raiteri CM, Villata M, Sandrinelli A, Lahteenmaki A, Tammi J, Tornikoski M, Hovatta T, Readhead ACS, Max-Moerbeck W, Richards JL, Jorstad S, Marscher A, Gurwell MA, Larionov VM, Blinov DA, Konstantinova TS, Kopatskaya EN, Larionova LV, Earionova EG, Morozova DA, Troitky IS, Mokrushina AA, Pavlova YV, Chen WP, Lin HC, Panwar N, Agudo I, Casadio C, Gomez JL, Molina SN, Kurtanidze OM, Nikolashvili MG, Kurtanidze SO, Chigladze RA, Acosta-Pulido JA, Carnerero MI, Manilla-Robles A, Ovcharov E, Bozhilov V, Metodieva I, Aller MF, Aller HD, Fuhrman L, Angelakis E, Nestoras I, Krichbaue TP, Zensue JA, Ungerechts H, and Sievers A
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ACTIVE GALACTIC NUCLEI ,LARGE-AREA TELESCOPE ,HIGH-ENERGY EMISSION ,BASE-LINE ARRAY ,BLAZAR 3C 279 ,MULTIWAVELENGTH OBSERVATIONS ,X-RAY ,POLARIMETRIC OBSERVATIONS ,BACKGROUND-RADIATION ,HIGH-FREQUENCIES ,galaxies [Gamma rays] ,galaxies: active ,galaxies: jets ,gamma rays: galaxies ,quasars: individual: PKS1510-089 ,Astrophysics ,01 natural sciences ,QD ,MAGIC (telescope) ,010303 astronomy & astrophysics ,QC ,QB ,High Energy Astrophysical Phenomena (astro-ph.HE) ,astro-ph.HE ,Physics ,Galaxies: active ,Gamma rays: galaxies ,Spectral energy distribution ,Electrónica ,Física nuclear ,Electricidad ,Astrophysics - High Energy Astrophysical Phenomena ,Galaxies: jets ,Quasars: individual: PKS 1510-089 ,Astronomy and Astrophysics ,Space and Planetary Science ,active [Galaxies] ,Astrophysics::High Energy Astrophysical Phenomena ,FOS: Physical sciences ,Astrophysics::Cosmology and Extragalactic Astrophysics ,galaxies: active / galaxies: jets / gamma rays: galaxies / quasars: individual: PKS 1510-089 ,Radio spectrum ,0103 physical sciences ,individual: PKS 1510-089 [Quasars] ,Blazar ,Very Long Baseline Array ,010308 nuclear & particles physics ,Compton scattering ,Quasar ,ddc:520 ,jets [Galaxies] ,Fermi Gamma-ray Space Telescope - Abstract
著者人数: 219名, Accepted: 2014-05-30, 資料番号: SA1140143000
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- 2014
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6. The awakening of BL Lacertae: observations by Fermi, Swift, and the GASP-WEBT
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V. T. Doroshenko, A. Berdyugin, M. I. Carnerero, Filippo D'Ammando, Stoyanka Peneva, Evgeni Semkov, D. O. Mirzaqulov, D. Carosati, A. C. Sadun, Elina Lindfors, M. J. Arévalo, J. Phipps, Dmitry A. Blinov, Rumen Bachev, Evgeni Ovcharov, S. G. Sergeev, Givi N. Kimeridze, K. A. Stoyanov, Svetlana G. Jorstad, Valeri M. Larionov, Neelam Panwar, Y. Metodieva, Y. Jadhav, R. Ligustri, Meenakshi Kohli, V. Kadenius, Alan P. Marscher, Antoniya Valcheva, N. Smith, I. M. McHardy, Sh. A. Ehgamberdiev, Sunay Ibryamov, Elena G. Larionova, Paul S. Smith, A. Sillanpää, R. Reinthal, C. M. Raiteri, A. Strigachev, Tatiana S. Konstantinova, Iván Agudo, M. G. Nikolashvili, V. Bozhilov, N. G. Pulatova, S. V. Nazarov, Carolina Casadio, Helmut Wiesemeyer, David Hiriart, G. A. Borman, Ivan S. Troitsky, R. D. Schwartz, Ekaterina Koptelova, Markus Böttcher, M. Villata, Kari Nilsson, E. N. Kopatskaya, Wen Ping Chen, B. McBreen, J. A. Ros, L. V. Larionova, Lorand A. Sigua, J. A. Acosta-Pulido, Ann E. Wehrle, Mark Gurwell, S. A. Klimanov, Manasvita Joshi, M. Pasanen, Erika Benítez, D. N. Okhmat, L. O. Takalo, N. V. Efimova, Brian W. Taylor, Omar M. Kurtanidze, Clemens Thum, Sol N. Molina, D. A. Morozova, Pedro A. Gonzalez-Morales, Yu. S. Efimov, José L. Gómez, Raiteri CM, Villata M, DAmmando F, Larionov VM, Gurwell MA, Mirzaqulov DO, Smith PS, Acosta-Pulido JA, Agudo I, Arevalo MJ, Bachev R, Benitez E, Berdyugin A, Blinov DA, Borman GA, Bottcher M, Bozhilov V, Carnerero MI, Carosati D, Casadio C, Chen WP, Doroshenko VT, Efimova YS, Efimova NV, Ehgamberdiev SA, Gomez JL, Gonzalez-Morales PA, Hiriart D, Ibryamov S, Jadhav Y, Jorstad SG, Joshi M, Kadenius V, Klimanov SA, Kohli M, Konstantinova TS, Kopatskaya EN, Koptelova E, Kimeridze G, Kurtanidze OM, Larionova EG, Larionova LV, Ligustri R, Lindfors E, Marscher AP, McBreen B, McHardy IM, Metodieva Y, Molina SN, Morozova DA, Nazarov SV, Nikolashvili MG, Nilsson K, Okhmat DN, Ovcharov E, Panwar N, Pasanen M, Peneva S, Phipps J, Pulatova NG, Reinthal R, Ros JA, Sadun AC, Schwartz RD, Semkov E, Sergeev SG, Sigua LA, Sillanpaa A, Smith N, Stoyanov K, Strigachev A, Takalo LO, Taylor B, Thum C, Troitsky IS, Valcheva A, Wehrle AE, and Wiesemeyer H
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Physics ,High Energy Astrophysical Phenomena (astro-ph.HE) ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,ta115 ,Astrophysics::High Energy Astrophysical Phenomena ,Astronomy ,FOS: Physical sciences ,Astronomy and Astrophysics ,Astrophysics ,Polarization (waves) ,law.invention ,Telescope ,Wavelength ,Space and Planetary Science ,Observatory ,law ,Degree of polarization ,galaxies: active, BL Lacertae objects: general, BL Lacertae objects: individual: BL Lacertae, galaxies: jets ,Blazar ,Astrophysics - High Energy Astrophysical Phenomena ,BL Lac object ,Fermi Gamma-ray Space Telescope ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Since the launch of the Fermi satellite, BL Lacertae has been moderately active at gamma-rays and optical frequencies until May 2011, when the source started a series of strong flares. The exceptional optical sampling achieved by the GLAST-AGILE Support Program (GASP) of the Whole Earth Blazar Telescope (WEBT) in collaboration with the Steward Observatory allows us to perform a detailed comparison with the daily gamma-ray observations by Fermi. Discrete correlation analysis between the optical and gamma-ray emission reveals correlation with a time lag of 0 +- 1 d, which suggests cospatiality of the corresponding jet emitting regions. A better definition of the time lag is hindered by the daily gaps in the sampling of the extremely fast flux variations. In general, optical flares present more structure and develop on longer time scales than corresponding gamma-ray flares. Observations at X-rays and at millimetre wavelengths reveal a common trend, which suggests that the region producing the mm and X-ray radiation is located downstream from the optical and gamma-ray-emitting zone in the jet. The mean optical degree of polarisation slightly decreases over the considered period and in general it is higher when the flux is lower. The optical electric vector polarisation angle (EVPA) shows a preferred orientation of about 15 deg, nearly aligned with the radio core EVPA and mean jet direction. Oscillations around it increase during the 2011-2012 outburst. We investigate the effects of a geometrical interpretation of the long-term flux variability on the polarisation. A helical magnetic field model predicts an evolution of the mean polarisation that is in reasonable agreement with the observations. These can be fully explained by introducing slight variations in the compression factor in a transverse shock waves model., 17 pages, 17 figures, 1 table, accepted for publication in MNRAS
- Published
- 2013
7. Multi-wavelength observations of blazar AO 0235+164 in the 2008-2009 flaring state
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Ackermann, M., Ajello, M., Ballet, J., Barbiellini, G., Bastieri, D., Bellazzini, R., Blandford, R. D., Bloom, E. D., Bonamente, E., Borgland, A. W., Bottacini, E., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Charles, E., Chekhtman, A., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Cutini, S., D'Ammando, F., de, Palma F., Dermer, C. D., do, Couto e Silva E., Drell, P. S., Drlica-Wagner, A., Dubois, R., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Focke, W. B., Fortin, P., Fuhrmann, L., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giglietto, N., Giommi, P., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Guiriec, S., Hadasch, D., Hughes, R. E., Itoh, Ryosuke, Johannesson, G., Johnson, A. S., Knodlseder, J., Kuss, M., Lande, J., Larsson, S., Lee, S.-H., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Mazziotta, M. N., McEnery, J. E., Mehault, J., Michelson, P. F., Mitthumsiri, W., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann-Godo, M., Norris, J. P., Nuss, E., Omodei, N., Orlando, E., Paneque, D., Panetta, J. H., Pelassa, V., Pesce-Rollins, M., Pierbattista, M., Piron, F., Pivato, G., Porter, T. A., Raino, S., Rando, R., Rastawicki, D., Razzano, M., Readhead, A., Reimer, A., Reimer, O., Reyes, L. C., Richards, J. L., Sbarra, C., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Szostek, A., Thayer, J. G., Thayer, J. B., Thompson, D. J., Tinivella, M., Torres, D. F., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Waite, A. P., Winer, B. L., Wood, K. S., Yang, Z., Zimmer, S., Moderski, R., Nalewajko, K., Sikora, M., Villata, M., Raiteri, C. M., Aller, H. D., Aller, M. F., Arkharov, A. A., Benitez, E., Berdyugin, A., Blinov, D. A., Boettcher, M., Bravo, Calle O. J. A., Buemi, C. S., Carosati, D., Chen, W. P., Diltz, C., Di, Paola A., Dolci, M., Efimova, N. V., Forne, E., Gurwell, M. A., Heidt, J., Hiriart, D., Jordan, B., Kimeridze, G., Konstantinova, T. S., Kopatskaya, E. N., Koptelova, E., Kurtanidze, O. M., Lahteenmaki, A., Larionova, E. G., Larionova, L. V., Larionov, V. M., Leto, P., Lindfors, E., Lin, H. C., Morozova, D. A., Nikolashvili, M. G., Nilsson, K., Oksman, M., Roustazadeh, P., Sievers, A., Sigua, L. A., Sillanpaa, A., Fukazawa, Yasushi, Hayashida, Masaaki, Katagiri, Hideaki, Kataoka, Jun, Mizuno, Tsunefumi, Nishino, Sho, Osugi, Takashi, Okumura, Akira, Ozaki, Masanobu, Takahashi, Hiromitsu, Tanaka, Takaaki, Takahashi, Tadayuki, Ackermann, M., Ajello, M., Ballet, J., Barbiellini, G., Bastieri, D., Bellazzini, R., Blandford, R. D., Bloom, E. D., Bonamente, E., Borgland, A. W., Bottacini, E., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Charles, E., Chekhtman, A., Chiang, J., Ciprini, S., Claus, R., Cohen Tanugi, J., Cutini, S., D'Ammando, F., de Palma, F., Dermer, C. D., Silva, E. do Couto e., Drell, P. S., Drlica Wagner, A., Dubois, R., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Focke, W. B., Fortin, P., Fuhrmann, L., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giglietto, N., Giommi, P., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Guiriec, S., Hadasch, D., Hayashida, M., Hughes, R. E., Itoh, R., Jóhannesson, G., Johnson, A. S., Katagiri, H., Kataoka, J., Knödlseder, J., Kuss, M., Lande, J., Larsson, S., Lee, S. H., Longo, Francesco, Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Mazziotta, M. N., Mcenery, J. E., Mehault, J., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann Godo, M., Nishino, S., Norris, J. P., Nuss, E., Ohsugi, T., Okumura, A., Omodei, N., Orlando, E., Ozaki, M., Paneque, D., Panetta, J. H., Pelassa, V., Pesce Rollins, M., Pierbattista, M., Piron, F., Pivato, G., Porter, T. A., Rainò, S., Rando, R., Rastawicki, D., Razzano, M., Readhead, A., Reimer, A., Reimer, O., Reyes, L. C., Richards, J. L., Sbarra, C., Sgrò, C., Siskind, E. J., Spandre, G., Spinelli, P., Szostek, A., Takahashi, H., Tanaka, T., Thayer, J. G., Thayer, J. B., Thompson, D. J., Tinivella, M., Torres, D. F., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Waite, A. P., Winer, B. L., Wood, K. S., Yang, Z., Zimmer, S., Moderski, R., Nalewajko, K., Sikora, M., Villata, M., Raiteri, C. M., Aller, H. D., Aller, M. F., Arkharov, A. A., Benítez, E., Berdyugin, A., Blinov, D. A., Boettcher, M., Bravo Calle, O. J. A., Buemi, C. S., Carosati, D., Chen, W. P., Diltz, C., Di Paola, A., Dolci, M., Efimova, N. V., Forné, E., Gurwell, M. A., Heidt, J., Hiriart, D., Jordan, B., Kimeridze, G., Konstantinova, T. S., Kopatskaya, E. N., Koptelova, E., Kurtanidze, O. M., Lähteenmäki, A., Larionova, E. G., Larionova, L. V., Larionov, V. M., Leto, P., Lindfors, E., Lin, H. C., Morozova, D. A., Nikolashvili, M. G., Nilsson, K., Oksman, M., Roustazadeh, P., Sievers, A., Sigua, L. A., Sillanpää, A., Takahashi, T., Takalo, L. O., Tornikoski, M., Trigilio, C., Troitsky, I. S., Umana, G., Angelakis, E., Krichbaum, T. P., Nestoras, I., Riquelme, D., Krips, M., Trippe, S., Arai, A., Kawabata, K. S., Sakimoto, K., Sasada, M., Sato, S., Uemura, M., Yamanaka, M., Yoshida, M., Kanata, Belloni, T., Tagliaferri, G., Bonning, E. W., Isler, J., Urry, C. M., Hoversten, E., Falcone, A., Pagani, C., Stroh, M., Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), Laboratoire Univers et Particules de Montpellier (LUPM), Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), GLAST, Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Instituto de RadioAstronomía Milimétrica (IRAM), Centre National de la Recherche Scientifique (CNRS), Institut de RadioAstronomie Millimétrique (IRAM), INAF - Osservatorio Astronomico di Brera (OAB), Istituto Nazionale di Astrofisica (INAF), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université de Montpellier (UM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Montpellier 2 - Sciences et Techniques (UM2), Ackermann M, Ajello M, Ballet J, Barbiellini G, Bastieri D, Bellazzini R, Blandford RD, Bloom ED, Bonamente E, Borgland AW, Bottacini E, Bregeon J, Brigida M, Bruel P, Buehler R, Buson S, Caliandro GA, Cameron RA, Caraveo PA, Casandjian JM, Cavazzuti E, Cecchi C, Charles E, Chekhtman A, Chiang J, Ciprini S, Claus R, Cohen-Tanugi J, Cutini S, DAmmando F, de Palma F, Dermer CD, Silva EDE, Drell PS, Drlica-Wagner A, Dubois R, Favuzzi C, Fegan SJ, Ferrara EC, Focke WB, Fortin P, Fuhrmann L, Fukazawa Y, Fusco P, Gargano F, Gasparrini D, Gehrels N, Germani S, Giglietto N, Giommi P, Giordano F, Giroletti M, Glanzman T, Godfrey G, Grenier IA, Guiriec S, Hadasch D, Hayashida M, Hughes RE, Itoh R, Johannesson G, Johnson AS, Katagiri H, Kataoka J, Knodlseder J, Kuss M, Lande J, Larsson S, Lee SH, Longo F, Loparco F, Lott B, Lovellette MN, Lubrano P, Madejski GM, Mazziotta MN, McEnery JE, Mehault J, Michelson PF, Mitthumsiri W, Mizuno T, Monte C, Monzani ME, Morselli A, Moskalenko IV, Murgia S, Naumann-Godo M, Nishino S, Norris JP, Nuss E, Ohsugi T, Okumura A, Omodei N, Orlando E, Ozaki M, Paneque D, Panetta JH, Pelassa V, Pesce-Rollins M, Pierbattista M, Piron F, Pivato G, Porter TA, Raino S, Rando R, Rastawicki D, Razzano M, Readhead A, Reimer A, Reimer O, Reyes LC, Richards JL, Sbarra C, Sgro C, Siskind EJ, Spandre G, Spinelli P, Szostek A, Takahashi H, Tanaka T, Thayer JG, Thayer JB, Thompson DJ, Tinivella M, Torres DF, Tosti G, Troja E, Usher TL, Vandenbroucke J, Vasileiou V, Vianello G, Vitale V, Waite AP, Winer BL, Wood KS, Yang Z, Zimmer S, Moderski R, Nalewajko K, Sikora M, Villata M, Raiteri CM, Aller HD, Aller MF, Arkharov AA, Benitez E, Berdyugin A, Blinov DA, Boettcher M, Calle OJAB, Buemi CS, Carosati D, Chen WP, Diltz C, Di Paola A, Dolci M, Efimova NV, Forne E, Gurwell MA, Heidt J, Hiriart D, Jordan B, Kimeridze G, Konstantinova TS, Kopatskaya EN, Koptelova E, Kurtanidze OM, Lahteenmaki A, Larionova EG, Larionova LV, Larionov VM, Leto P, Lindfors E, Lin HC, Morozova DA, Nikolashvili MG, Nilsson K, Oksman M, Roustazadeh P, Sievers A, Sigua LA, Sillanpaa A, Takahashi T, Takalo LO, Tornikoski M, Trigilio C, Troitsky IS, Umana G, Angelakis E, Krichbaum TP, Nestoras I, Riquelme D, Krips M, Trippe S, Arai A, Kawabata KS, Sakimoto K, Sasada M, Sato S, Uemura M, Yamanaka M, Yoshida M, Belloni T, Tagliaferri G, Bonning EW, Isler J, Urry CM, Hoversten E, Falcone A, Pagani C, Stroh M, Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE] ,Infrared ,BL Lacertae objects: individual: AO 0235+164 ,galaxies: active ,galaxies: jets ,gamma rays: galaxies ,radiation mechanisms: non-thermal ,Astrophysics::High Energy Astrophysical Phenomena ,jets [galaxies] ,FOS: Physical sciences ,Context (language use) ,Astrophysics ,BL Lacertae objects: individual (AO 0235+164) ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Spectral line ,law.invention ,Telescope ,law ,individual (AO 0235+164) [BL Lacertae objects] ,0103 physical sciences ,galaxie [gamma rays] ,Blazar ,BL Lacertae objects: individual (AO 0235+164) – galaxies: active – galaxies: jets – gamma rays: galaxies – radiation mechanisms: non-therma ,010303 astronomy & astrophysics ,High Energy Astrophysical Phenomena (astro-ph.HE) ,Physics ,010308 nuclear & particles physics ,[SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE] ,Astronomy and Astrophysics ,Optical polarization ,Light curve ,non-thermal [radiation mechanisms] ,jet [galaxies] ,Space and Planetary Science ,active [galaxies] ,galaxies [gamma rays] ,ddc:520 ,Astrophysics - High Energy Astrophysical Phenomena ,individual: AO 0235+164 [BL Lacertae objects] ,Fermi Gamma-ray Space Telescope - Abstract
著者人数: 211名, Accepted: 2012-03-23, 資料番号: SA1004157000
- Published
- 2012
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8. Variability of the blazar 4C 38.41 (B3 1633+382) from GHz frequencies to GeV energies
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Neelam Panwar, M. J. Arévalo, Clemens Thum, Antoniya Valcheva, Mark Gurwell, Elena G. Larionova, R. D. Schwartz, S. N. Molina, Evgeni Ovcharov, M. Pasanen, J. Leon-Tavares, J. A. Ros, A. Di Paola, L. V. Larionova, Svetlana G. Jorstad, H. C. Lin, K. Blumenthal, A. Sillanpää, Tatiana S. Konstantinova, D. O. Mirzaqulov, D. A. Morozova, R. Reinthal, Jochen Heidt, Carolina Casadio, Anne Lähteenmäki, Ekaterina Koptelova, Sh. A. Ehgamberdiev, David Hiriart, Merja Tornikoski, J. A. Acosta-Pulido, D. Carosati, Mauro Dolci, G. M. Richter, Ann E. Wehrle, A. I. Gonzále, I. Agudo, T. M. Carleton, José L. Gómez, I. M. McHardy, Alan P. Marscher, I. S. Troitsky, I. Puerto-Gimenez, M. G. Nikolashvili, E. N. Kopatskaya, Paolo Leto, Corrado Trigilio, G. Umana, N. Smith, T. Sakamoto, Kari Nilsson, Omar M. Kurtanidze, Wen Ping Chen, Sofia O. Kurtanidze, Raúl Mújica, A. Bueno, Filippo D'Ammando, C. M. Raiteri, L. O. Takalo, Valeri M. Larionov, Brian W. Taylor, M. I. Carnerero, Sh. Holikov, A. A. Arkharov, N. V. Efimova, Joni Tammi, Manasvita Joshi, Paul S. Smith, M. Villata, Andrei Berdyugin, Erika Benítez, U. Bach, Dmitry A. Blinov, Hugh D. Aller, V. A. Hagen-Thorn, M. F. Aller, Elina Lindfors, Carla Buemi, Anne Lähteenmäki Group, Aalto-yliopisto, Aalto University, Raiteri CM, Villata M, Smith PS, Larionov VM, Acosta-Pulido JA, Aller MF, DAmmando F, Gurwell MA, Jorstad SG, Joshi M, Kurtanidze OM, Lahteenmaki A, Mirzaqulov DO, Agudo I, Aller HD, Arevalo MJ, Arkharov AA, Bach U, Benitez E, Berdyugin A, Blinov DA, Blumenthal K, Buemi CS, Bueno A, Carleton TM, Carnerero MI, Carosati D, Casadio C, Chen WP, Di Paola A, Dolci M, Efimova NV, Ehgamberdiev SA, Gomez JL, Gonzalez AI, Hagen-Thorn VA, Heidt J, Hiriart D, Holikov S, Konstantinova TS, Kopatskaya EN, Koptelova E, Kurtanidze SO, Larionova EG, Larionova LV, Leon-Tavares J, Leto P, Lin HC, Lindfors E, Marscher AP, McHardy IM, Molina SN, Morozova DA, Mujica R, Nikolashvili MG, Nilsson K, Ovcharov EP, Panwar N, Pasanen M, Puerto-Gimenez I, Reinthal R, Richter GM, Ros JA, Sakamoto T, Schwartz RD, Sillanpaa A, Smith N, Takalo LO, Tammi J, Taylor B, Thum C, Tornikoski M, Trigilio C, Troitsky IS, Umana G, Valcheva AT, and Wehrle AE
- Subjects
Brightness ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Astrophysics::High Energy Astrophysical Phenomena ,education ,jets [galaxies] ,Flux ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,individual: 4C 38.41 [quasars] ,0103 physical sciences ,Blazar ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,Physics ,High Energy Astrophysical Phenomena (astro-ph.HE) ,Jet (fluid) ,Line-of-sight ,general [quasars] ,010308 nuclear & particles physics ,Astronomy and Astrophysics ,Viewing angle ,Light curve ,galaxies: active – quasars: general – quasars: individual: 4C 38.41 – galaxies: jets ,13. Climate action ,Space and Planetary Science ,active [galaxies] ,Astrophysics - High Energy Astrophysical Phenomena ,Astrophysics - Cosmology and Nongalactic Astrophysics ,Fermi Gamma-ray Space Telescope - Abstract
The quasar-type blazar 4C 38.41 (B3 1633+382) experienced a large outburst in 2011, which was detected throughout the entire electromagnetic spectrum. We present the results of low-energy multifrequency monitoring by the GASP project of the WEBT consortium and collaborators, as well as those of spectropolarimetric/spectrophotometric monitoring at the Steward Observatory. We also analyse high-energy observations of the Swift and Fermi satellites. In the optical-UV band, several results indicate that there is a contribution from a QSO-like emission component, in addition to both variable and polarised jet emission. The unpolarised emission component is likely thermal radiation from the accretion disc that dilutes the jet polarisation. We estimate its brightness to be R(QSO) ~ 17.85 - 18 and derive the intrinsic jet polarisation degree. We find no clear correlation between the optical and radio light curves, while the correlation between the optical and \gamma-ray flux apparently fades in time, likely because of an increasing optical to \gamma-ray flux ratio. As suggested for other blazars, the long-term variability of 4C 38.41 can be interpreted in terms of an inhomogeneous bent jet, where different emitting regions can change their alignment with respect to the line of sight, leading to variations in the Doppler factor \delta. Under the hypothesis that in the period 2008-2011 all the \gamma-ray and optical variability on a one-week timescale were due to changes in \delta, this would range between ~ 7 and ~ 21. If the variability were caused by changes in the viewing angle \theta\ only, then \theta\ would go from ~ 2.6 degr to ~ 5 degr. Variations in the viewing angle would also account for the dependence of the polarisation degree on the source brightness in the framework of a shock-in-jet model., Comment: 19 pages, 23 figures, in press for Astronomy and Astrophysics
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- 2012
9. Identification of gamma-ray emission from 3C345 and NRAO512
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M. Roca-Sogorb, Alan P. Marscher, I. S. Troitsky, Sofia O. Kurtanidze, C. M. Raiteri, O. J. A. Bravo Calle, Mark Gurwell, F. K. Schinzel, Ricard Casas, Tatiana S. Konstantinova, M. G. Nikolashvili, J. L. Gomez, V. V. Vlasyuk, Kirill Sokolovsky, M. Villata, T. H. Burnett, J. A. Zensus, H. Y. Hsiao, L. C. Reyes, S. G. Jorstad, Walter Max-Moerbeck, J. M. Casandjian, O. I. Spiridonova, E. N. Kopatskaya, D. Carosati, C. C. Cheung, Valeri M. Larionov, Omar M. Kurtanidze, I. Agudo, A. P. Lobanov, J. A. Ros, S. J. Fegan, L. V. Larionova, Lorand A. Sigua, D. A. Morozova, Elena G. Larionova, Givi N. Kimeridze, Ekaterina Koptelova, F. D'Ammando, Schinzel FK, Sokolovsky KV, DAmmando F, Burnett TH, Max-Moerbeck W, Cheung CC, Fegan SJ, Casandjian JM, Reyes LC, Villata M, Raiteri CM, Agudo I, Calle OJAB, Carosati D, Casas R, Gomez JL, Gurwell MA, Hsiao HY, Jorstad SG, Kimeridze G, Konstantinova TS, Kopatskaya EN, Koptelova E, Kurtanidze OM, Kurtanidze SO, Larionov VM, Larionova EG, Larionova LV, Marscher AP, Morozova DA, Nikolashvili MG, Roca-Sogorb M, Ros JA, Sigua LA, Spiridonova O, Troitsky IS, Vlasyuk VV, Lobanov AP, and Zensus JA
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Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,FOS: Physical sciences ,Astrophysics ,01 natural sciences ,Radio spectrum ,law.invention ,Telescope ,Observatory ,law ,0103 physical sciences ,Egret ,010306 general physics ,Blazar ,010303 astronomy & astrophysics ,Physics ,High Energy Astrophysical Phenomena (astro-ph.HE) ,biology ,Gamma ray ,Astronomy and Astrophysics ,Quasar ,biology.organism_classification ,galaxies: active, quasars: individual: 3C 345, gamma rays: galaxies, quasars: individual: NRAO 512, quasars: individual: B3 1640+396 ,13. Climate action ,Space and Planetary Science ,Astrophysics - High Energy Astrophysical Phenomena ,Fermi Gamma-ray Space Telescope ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
For more than 15 years, since the days of the Energetic Gamma-Ray Experiment Telescope (EGRET) on board the Compton Gamma-Ray Observatory (CGRO; 1991-2000), it has remained an open question why the prominent blazar 3C 345 was not reliably detected at gamma-ray energies, 11 pages, 5 figures, 5 tables, accepted for publication in A&A
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- 2011
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10. Multiwavelength behaviour of the blazar OJ 248 from radio to gamma-rays
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M. I. Carnerero, Sofia O. Kurtanidze, J. A. Acosta-Pulido, E. N. Kopatskaya, Paolo Leto, C. S. Lin, A. B. Grinon-Marin, Sol N. Molina, D. A. Morozova, H. C. Lin, R. Bachev, Neelam Panwar, A. I. Manilla-Robles, M. Orienti, Valeri M. Larionov, Marcello Giroletti, J. L. Gomez, P. A. González-Morales, Antoniya Valcheva, Carolina Casadio, Anne Lähteenmäki, Helmut Wiesemeyer, Uwe Bach, Goran Damljanović, Corrado Trigilio, Y. T. Metodieva, D. O. Mirzaqulov, Sunay Ibryamov, Elena G. Larionova, A. Bueno Bueno, T. S. Grishina, H. Y. Hsiao, V. Ramakrishnan, G. Umana, D. Carosati, Wen Ping Chen, Arkady A. Arkharov, V. Bozhilov, Ivan Agudo, Mark Gurwell, A. Pastor Yabar, I. M. McHardy, David Hiriart, Carla Buemi, Manasvita Joshi, A. Strigachev, Alan P. Marscher, S. G. Jorstad, A. Di Paola, Lorand A. Sigua, L. V. Larionova, M. J. Arévalo, N. V. Efimova, D. Blinov, Erika Benítez, C. M. Raiteri, Brian W. Taylor, Omar M. Kurtanidze, I. Puerto Giménez, Evgeni Ovcharov, Yu. V. Troitskaya, M. G. Nikolashvili, Sergio Velasco, Ann E. Wehrle, A. A. Mokrushina, Paul S. Smith, M. Villata, Ivan S. Troitsky, Sh. A. Ehgamberdiev, Merja Tornikoski, M. Rossini, G. M. Richter, Filippo D'Ammando, C. Lázaro, O. Vince, Carnerero MI, Raiteri CM, Villata M, Acosta-Pulido JA, DAmmando F, Smith PS, Larionov VM, Agudo I, Arevalo MJ, Arkharov AA, Bach U, Bachev R, Benitez E, Blinov DA, Bozhilov V, Buemi CS, Bueno AB, Carosati D, Casadio C, Chen WP, Damljanovic G, Di Paola A, Efimova NV, Ehgamberdiev SA, Giroletti M, Gomez JL, Gonzalez-Morales PA, Grinon-Marin AB, Grishina TS, Gurwell MA, Hiriart D, Hsiao HY, Ibryamov S, Jorstad SG, Joshi M, Kopatskaya EN, Kurtanidze OM, Kurtanidze SO, Lahteenmaki A, Larionova EG, Larionova LV, Lazaro C, Leto P, Lin CS, Lin HC, Manilla-Robles AI, Marscher AP, McHardy IM, Metodieva Y, Mirzaqulov DO, Mokrushina AA, Molina SN, Morozova DA, Nikolashvili MG, Orienti M, Ovcharov E, Panwar N, Yabar AP, Gimenez IP, Ramakrishnan V, Richter GM, Rossini M, Sigua LA, Strigachev A, Taylor B, Tornikoski M, Trigilio C, Troitskaya YV, Troitsky IS, Umana G, Valcheva A, Velasco S, Vince O, Wehrle AE, Wiesemeyer H, Anne Lähteenmäki Group, Department of Radio Science and Engineering, Aalto-yliopisto, and Aalto University
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active [Galaxies] ,Radio galaxy ,Astrophysics::High Energy Astrophysical Phenomena ,ta221 ,galaxies: active ,ta1171 ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,law.invention ,Telescope ,Observatory ,law ,quasars: general ,Emission spectrum ,Blazar ,ta216 ,Physics ,individual: OJ 248 [Quasars] ,ta115 ,ta213 ,ta114 ,Linear polarization ,quasars: individual: OJ 248 ,Astronomy ,Astronomy and Astrophysics ,general [Quasars] ,galaxies: active, galaxies: jets, quasars: general, quasars: individual: OJ 248 ,galaxies: jets ,Light curve ,Astrophysics - Astrophysics of Galaxies ,Space and Planetary Science ,jets [Galaxies] ,Astrophysics - High Energy Astrophysical Phenomena ,Fermi Gamma-ray Space Telescope - Abstract
We present an analysis of the multiwavelength behaviour of the blazar OJ 248 at z = 0.939 in the period 2006-2013. We use low-energy data (optical, near-infrared, and radio) obtained by 21 observatories participating in the GLAST-AGILE Support Program (GASP) of the Whole Earth Blazar Telescope (WEBT), as well as data from the Swift (optical-UV and X-rays) and Fermi (gamma-rays) satellites, to study flux and spectral variability and correlations among emissions in different bands. We take into account the effect of absorption by the Damped Lyman Alpha intervening system at z = 0.525. Two major outbursts were observed in 2006-2007 and in 2012-2013 at optical and near-IR wavelengths, while in the high-frequency radio light curves prominent radio outbursts are visible peaking at the end of 2010 and beginning of 2013, revealing a complex radio-optical correlation. Cross-correlation analysis suggests a delay of the optical variations after the gamma-ray ones of about a month, which is a peculiar behaviour in blazars. We also analyse optical polarimetric and spectroscopic data. The average polarization percentage P is less than 3 per cent, but it reaches about 19 per cent during the early stage of the 2012-2013 outburst. A vague correlation of P with brightness is observed. There is no preferred electric vector polarisation angle and during the outburst the linear polarization vector shows wide rotations in both directions, suggesting a complex behaviour or structure of the jet and possible turbulence. The analysis of 140 optical spectra acquired at the Steward Observatory reveals a strong Mg II broad emission line with an essentially stable flux of 6.2 e-15 erg cm-2 s-1 and a full width at half-maximum of 2053 km s-1., Comment: 16 pages, 20 figures, 2 tables, in press for MNRAS
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- 2015
11. Polarized blazar X-rays imply particle acceleration in shocks.
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Liodakis I, Marscher AP, Agudo I, Berdyugin AV, Bernardos MI, Bonnoli G, Borman GA, Casadio C, Casanova VC, Cavazzuti E, Rodriguez Cavero N, Di Gesu L, Di Lalla N, Donnarumma I, Ehlert SR, Errando M, Escudero J, Garcı A-Comas M, Agı S-González B, Husillos C, Jormanainen J, Jorstad SG, Kagitani M, Kopatskaya EN, Kravtsov V, Krawczynski H, Lindfors E, Larionova EG, Madejski GM, Marin F, Marchini A, Marshall HL, Morozova DA, Massaro F, Masiero JR, Mawet D, Middei R, Millar-Blanchaer MA, Myserlis I, Negro M, Nilsson K, O'Dell SL, Omodei N, Pacciani L, Paggi A, Panopoulou GV, Peirson AL, Perri M, Petrucci PO, Poutanen J, Puccetti S, Romani RW, Sakanoi T, Savchenko SS, Sota A, Tavecchio F, Tinyanont S, Vasilyev AA, Weaver ZR, Zhovtan AV, Antonelli LA, Bachetti M, Baldini L, Baumgartner WH, Bellazzini R, Bianchi S, Bongiorno SD, Bonino R, Brez A, Bucciantini N, Capitanio F, Castellano S, Ciprini S, Costa E, De Rosa A, Del Monte E, Di Marco A, Doroshenko V, Dovčiak M, Enoto T, Evangelista Y, Fabiani S, Ferrazzoli R, Garcia JA, Gunji S, Hayashida K, Heyl J, Iwakiri W, Karas V, Kitaguchi T, Kolodziejczak JJ, La Monaca F, Latronico L, Maldera S, Manfreda A, Marinucci A, Matt G, Mitsuishi I, Mizuno T, Muleri F, Ng SC, Oppedisano C, Papitto A, Pavlov GG, Pesce-Rollins M, Pilia M, Possenti A, Ramsey BD, Rankin J, Ratheesh A, Sgró C, Slane P, Soffitta P, Spandre G, Tamagawa T, Taverna R, Tawara Y, Tennant AF, Thomas NE, Tombesi F, Trois A, Tsygankov S, Turolla R, Vink J, Weisskopf MC, Wu K, Xie F, and Zane S
- Abstract
Most of the light from blazars, active galactic nuclei with jets of magnetized plasma that point nearly along the line of sight, is produced by high-energy particles, up to around 1 TeV. Although the jets are known to be ultimately powered by a supermassive black hole, how the particles are accelerated to such high energies has been an unanswered question. The process must be related to the magnetic field, which can be probed by observations of the polarization of light from the jets. Measurements of the radio to optical polarization-the only range available until now-probe extended regions of the jet containing particles that left the acceleration site days to years earlier
1-3 , and hence do not directly explore the acceleration mechanism, as could X-ray measurements. Here we report the detection of X-ray polarization from the blazar Markarian 501 (Mrk 501). We measure an X-ray linear polarization degree ΠX of around 10%, which is a factor of around 2 higher than the value at optical wavelengths, with a polarization angle parallel to the radio jet. This points to a shock front as the source of particle acceleration and also implies that the plasma becomes increasingly turbulent with distance from the shock., (© 2022. The Author(s).)- Published
- 2022
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12. Rapid quasi-periodic oscillations in the relativistic jet of BL Lacertae.
- Author
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Jorstad SG, Marscher AP, Raiteri CM, Villata M, Weaver ZR, Zhang H, Dong L, Gómez JL, Perel MV, Savchenko SS, Larionov VM, Carosati D, Chen WP, Kurtanidze OM, Marchini A, Matsumoto K, Mortari F, Aceti P, Acosta-Pulido JA, Andreeva T, Apolonio G, Arena C, Arkharov A, Bachev R, Banfi M, Bonnoli G, Borman GA, Bozhilov V, Carnerero MI, Damljanovic G, Ehgamberdiev SA, Elsässer D, Frasca A, Gabellini D, Grishina TS, Gupta AC, Hagen-Thorn VA, Hallum MK, Hart M, Hasuda K, Hemrich F, Hsiao HY, Ibryamov S, Irsmambetova TR, Ivanov DV, Joner MD, Kimeridze GN, Klimanov SA, Knött J, Kopatskaya EN, Kurtanidze SO, Kurtenkov A, Kuutma T, Larionova EG, Leonini S, Lin HC, Lorey C, Mannheim K, Marino G, Minev M, Mirzaqulov DO, Morozova DA, Nikiforova AA, Nikolashvili MG, Ovcharov E, Papini R, Pursimo T, Rahimov I, Reinhart D, Sakamoto T, Salvaggio F, Semkov E, Shakhovskoy DN, Sigua LA, Steineke R, Stojanovic M, Strigachev A, Troitskaya YV, Troitskiy IS, Tsai A, Valcheva A, Vasilyev AA, Vince O, Waller L, Zaharieva E, and Chatterjee R
- Abstract
Blazars are active galactic nuclei (AGN) with relativistic jets whose non-thermal radiation is extremely variable on various timescales
1-3 . This variability seems mostly random, although some quasi-periodic oscillations (QPOs), implying systematic processes, have been reported in blazars and other AGN. QPOs with timescales of days or hours are especially rare4 in AGN and their nature is highly debated, explained by emitting plasma moving helically inside the jet5 , plasma instabilities6,7 or orbital motion in an accretion disc7,8 . Here we report results of intense optical and γ-ray flux monitoring of BL Lacertae (BL Lac) during a dramatic outburst in 2020 (ref.9 ). BL Lac, the prototype of a subclass of blazars10 , is powered by a 1.7 × 108 MSun (ref.11 ) black hole in an elliptical galaxy (distance = 313 megaparsecs (ref.12 )). Our observations show QPOs of optical flux and linear polarization, and γ-ray flux, with cycles as short as approximately 13 h during the highest state of the outburst. The QPO properties match the expectations of current-driven kink instabilities6 near a recollimation shock about 5 parsecs (pc) from the black hole in the wake of an apparent superluminal feature moving down the jet. Such a kink is apparent in a microwave Very Long Baseline Array (VLBA) image., (© 2022. The Author(s), under exclusive licence to Springer Nature Limited.)- Published
- 2022
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13. Common dace (Leuciscus leuciscus) - A new host of the myxozoan fish parasite, Myxobolus elegans (Cnidaria: Myxozoa) - Short communication.
- Author
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Morozova DA, Voronin VN, and Katokhin AV
- Subjects
- Animals, Fish Diseases parasitology, Gills parasitology, Myxobolus classification, Myxobolus genetics, Parasitic Diseases, Animal parasitology, RNA, Ribosomal, 18S analysis, Russia, Cyprinidae parasitology, Host-Parasite Interactions, Myxobolus isolation & purification
- Abstract
This paper reports the detection of the myxozoan species Myxobolus elegans Kashkovsky 1966 in common dace (Leuciscus leuciscus) that has not been previously listed as its host. The problem of differentiation of phenotypically similar Myxobolus species is addressed. During parasitological survey of common dace from the desalinated part of the Gulf of Finland at the city of Sestroretsk, Russia, numerous oval-shaped plasmodia, 0.2-0.4 mm in size, filled with Myxobolus spores were found on the gills. Pear-shaped myxospores were 15.4 (14.8-16.0) × 10.2 (9.6-10.9) µm in size with a rib on each valve. On the basis of spore morphology, the species appeared to be similar to M. elegans and Myxobolus hungaricus Jaczó, 1940. In order to identify the species, molecular genetic analysis was performed, and the species was identified on the basis of morphological characteristics and 18S rDNA data. The results obtained indicate that the Myxobolus species observed on the gills of dace is M. elegans. Thus, common dace is another valid host of M. elegans besides the type host, ide (Leuciscus idus).
- Published
- 2020
- Full Text
- View/download PDF
14. Blazar spectral variability as explained by a twisted inhomogeneous jet.
- Author
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Raiteri CM, Villata M, Acosta-Pulido JA, Agudo I, Arkharov AA, Bachev R, Baida GV, Benítez E, Borman GA, Boschin W, Bozhilov V, Butuzova MS, Calcidese P, Carnerero MI, Carosati D, Casadio C, Castro-Segura N, Chen WP, Damljanovic G, D'Ammando F, Di Paola A, Echevarría J, Efimova NV, Ehgamberdiev SA, Espinosa C, Fuentes A, Giunta A, Gómez JL, Grishina TS, Gurwell MA, Hiriart D, Jermak H, Jordan B, Jorstad SG, Joshi M, Kopatskaya EN, Kuratov K, Kurtanidze OM, Kurtanidze SO, Lähteenmäki A, Larionov VM, Larionova EG, Larionova LV, Lázaro C, Lin CS, Malmrose MP, Marscher AP, Matsumoto K, McBreen B, Michel R, Mihov B, Minev M, Mirzaqulov DO, Mokrushina AA, Molina SN, Moody JW, Morozova DA, Nazarov SV, Nikolashvili MG, Ohlert JM, Okhmat DN, Ovcharov E, Pinna F, Polakis TA, Protasio C, Pursimo T, Redondo-Lorenzo FJ, Rizzi N, Rodriguez-Coira G, Sadakane K, Sadun AC, Samal MR, Savchenko SS, Semkov E, Skiff BA, Slavcheva-Mihova L, Smith PS, Steele IA, Strigachev A, Tammi J, Thum C, Tornikoski M, Troitskaya YV, Troitsky IS, Vasilyev AA, and Vince O
- Abstract
Blazars are active galactic nuclei, which are powerful sources of radiation whose central engine is located in the core of the host galaxy. Blazar emission is dominated by non-thermal radiation from a jet that moves relativistically towards us, and therefore undergoes Doppler beaming. This beaming causes flux enhancement and contraction of the variability timescales, so that most blazars appear as luminous sources characterized by noticeable and fast changes in brightness at all frequencies. The mechanism that produces this unpredictable variability is under debate, but proposed mechanisms include injection, acceleration and cooling of particles, with possible intervention of shock waves or turbulence. Changes in the viewing angle of the observed emitting knots or jet regions have also been suggested as an explanation of flaring events and can also explain specific properties of blazar emission, such as intra-day variability, quasi-periodicity and the delay of radio flux variations relative to optical changes. Such a geometric interpretation, however, is not universally accepted because alternative explanations based on changes in physical conditions-such as the size and speed of the emitting zone, the magnetic field, the number of emitting particles and their energy distribution-can explain snapshots of the spectral behaviour of blazars in many cases. Here we report the results of optical-to-radio-wavelength monitoring of the blazar CTA 102 and show that the observed long-term trends of the flux and spectral variability are best explained by an inhomogeneous, curved jet that undergoes changes in orientation over time. We propose that magnetohydrodynamic instabilities or rotation of the twisted jet cause different jet regions to change their orientation and hence their relative Doppler factors. In particular, the extreme optical outburst of 2016-2017 (brightness increase of six magnitudes) occurred when the corresponding emitting region had a small viewing angle. The agreement between observations and theoretical predictions can be seen as further validation of the relativistic beaming theory.
- Published
- 2017
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15. Morphological and molecular characterization of a new cyprinid gall bladder-infecting Chloromyxum species, Chloromyxum peleci sp. n. (Myxozoa: Chloromyxidae), from Pelecus cultratus (L.) in Russia.
- Author
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Liu XH, Voronin VN, Dudin AS, Morozova DA, and Zhang JY
- Subjects
- Animals, Cyprinidae genetics, DNA, Ribosomal genetics, Gallbladder parasitology, Myxozoa isolation & purification, Phylogeny, Russia, Spores, Cyprinidae parasitology, Fish Diseases parasitology, Myxozoa classification
- Abstract
Extensive sampling to get rich data is very important to resolve the current taxonomic problem of Chloromyxum genus and elucidate the nature phylogenetic relationships among congeneric species. During the parasitological survey of cyprinid fish in Gulf of Finland off the coast of St. Petersburg, a new Chloromyxum species, named as Chloromyxum peleci sp. n., was found to infect the gall bladder of sichel, Pelecus cultratus (L.). Here, we provided the morphological, ultrastructural, and molecular features to describe it. Infection was represented by mono- or disporic plasmodia and mature free-floating spores in the gall bladder. Mature spores are typical of freshwater Chloromyxum species, spherical or subspherical in lateral view, measuring 8.8 ± 0.5 μm (7.4-9.5) in length, 7.8 ± 0.3 μm (7.0-8.8) in width, and 7.5 ± 0.4 μm (6.8-8.2) in thickness. Spores have a cog-like appearance in apical view for sutural ridge, and eight to ten widely spaced extrasutural ridges per valve protrude from the spore valve margin. The surface ridge patterns of the new species are similar with those of Chloromyxum auratum and Chloromyxum cristatum, with some branching. Four polar capsules of slightly unequal in two pairs were oval in apical view and pyriform in side view, locating at the anterior end of the spores. Polar filaments coil with four to five turns. The obtained almost full length of 18S ribosomal DNA (rDNA) of Ch. peleci sp. n. does not match any sequences available in GenBank but was most closely related to that of Chloromyxum fluviatile (97.9%). Phylogenetic analysis indicated that Ch. peleci sp. n. clustered in a Chloromyxum subclade infecting the gall bladder of freshwater teleost, with robust nodal support. However, Chloromyxum sensu lato infecting gall bladder of freshwater teleost was again proved to be polyphyletic. The possible evolutionary history of Chloromyxum morphotype of Chloromyxum sensu lato was discussed based on the rDNA-referred phylogeny. This is the second Chloromyxum species from sichel.
- Published
- 2017
- Full Text
- View/download PDF
16. [FINDING OF PARALECITHODENDRIUM CHILOSTOMUM (TREMATODA: LECITHODENDRIIDAE) IN A ROUNDLEAF BAT AND IN THE AFRICAN SHARPTOOTH CATFISH FROM ETHIOPIA].
- Author
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Morozova DA and Zhokhov AE
- Subjects
- Animals, Ethiopia, Catfishes parasitology, Chiroptera parasitology, Trematoda classification, Trematoda isolation & purification, Trematoda physiology
- Abstract
Adult trematodes Paralecithodendrium chilostomum (Mehlis, 1831) were detected in the roundleaf bat Hipposideros sp. and in the African sharptooth catfish Clarias gariepinus from Tana Lake, Ethiopia. The catfish is an accidental host for P. chilostomum. This is the first record of P. chilostomum from Ethiopia. The description and figures of P. chilostomum from both host species, Hipposideros sp. and Clarias gariepinus are given.
- Published
- 2016
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