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Your search keyword '"Esposito, S."' showing total 19 results
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19 results on '"Esposito, S."'

1. Near-infrared observations of outflows and young stellar objects in the massive star-forming region AFGL 5180

Author

Crowe, S., primary, Fedriani, R., additional, Tan, J. C., additional, Whittle, M., additional, Zhang, Y., additional, Caratti o Garatti, A., additional, Farias, J. P., additional, Gautam, A., additional, Telkamp, Z., additional, Rothberg, B., additional, Grudić, M., additional, Andersen, M., additional, Cosentino, G., additional, Garcia-Lopez, R., additional, Rosero, V., additional, Tanaka, K., additional, Pinna, E., additional, Rossi, F., additional, Miller, D., additional, Agapito, G., additional, Plantet, C., additional, Ghose, E., additional, Christou, J., additional, Power, J., additional, Puglisi, A., additional, Briguglio, R., additional, Brusa, G., additional, Taylor, G., additional, Zhang, X., additional, Mazzoni, T., additional, Bonaglia, M., additional, Esposito, S., additional, and Veillet, C., additional

Published
2024
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2. GMP-selected dual and lensed AGNs: Selection function and classification based on near-IR colors and resolved spectra from VLT/ERIS, Keck/OSIRIS, and LBT/LUCI

Author

Mannucci, F., primary, Scialpi, M., additional, Ciurlo, A., additional, Yeh, S., additional, Marconcini, C., additional, Tozzi, G., additional, Cresci, G., additional, Marconi, A., additional, Amiri, A., additional, Belfiore, F., additional, Carniani, S., additional, Cicone, C., additional, Nardini, E., additional, Pancino, E., additional, Rubinur, K., additional, Severgnini, P., additional, Ulivi, L., additional, Venturi, G., additional, Vignali, C., additional, Volonteri, M., additional, Pinna, E., additional, Rossi, F., additional, Puglisi, A., additional, Agapito, G., additional, Plantet, C., additional, Ghose, E., additional, Carbonaro, L., additional, Xompero, M., additional, Grani, P., additional, Esposito, S., additional, Power, J., additional, Guerra Ramon, J. C., additional, Lefebvre, M., additional, Cavallaro, A., additional, Davies, R., additional, Riccardi, A., additional, Macintosh, M., additional, Taylor, W., additional, Dolci, M., additional, Baruffolo, A., additional, Feuchtgruber, H., additional, Kravchenko, K., additional, Rau, C., additional, Sturm, E., additional, Wiezorrek, E., additional, Dallilar, Y., additional, and Kenworthy, M., additional

Published
2023
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4. The Enhanced Resolution Imager and Spectrograph for the VLT

Author

Davies, R., primary, Absil, O., additional, Agapito, G., additional, Agudo Berbel, A., additional, Baruffolo, A., additional, Biliotti, V., additional, Black, M., additional, Bonaglia, M., additional, Bonse, M., additional, Briguglio, R., additional, Campana, P., additional, Cao, Y., additional, Carbonaro, L., additional, Cortes, A., additional, Cresci, G., additional, Dallilar, Y., additional, Dannert, F., additional, De Rosa, R. J., additional, Deysenroth, M., additional, Di Antonio, I., additional, Di Cianno, A., additional, Di Rico, G., additional, Doelman, D., additional, Dolci, M., additional, Dorn, R., additional, Eisenhauer, F., additional, Esposito, S., additional, Fantinel, D., additional, Ferruzzi, D., additional, Feuchtgruber, H., additional, Finger, G., additional, Förster Schreiber, N. M., additional, Gao, X., additional, Gemperlein, H., additional, Genzel, R., additional, Gillessen, S., additional, Ginski, C., additional, Glauser, A. M., additional, Glindemann, A., additional, Grani, P., additional, Hartl, M., additional, Hayoz, J., additional, Heida, M., additional, Henry, D., additional, Hofmann, R., additional, Huber, H., additional, Kasper, M., additional, Keller, C., additional, Kenworthy, M., additional, Kravchenko, K., additional, Kuntschner, H., additional, Lacour, S., additional, Lightfoot, J., additional, Lunney, D., additional, Lutz, D., additional, Macintosh, M., additional, Mannucci, F., additional, Marsset, M., additional, Modigliani, A., additional, Neeser, M., additional, Orban de Xivry, G., additional, Ott, T., additional, Pallanca, L., additional, Patapis, P., additional, Pearson, D., additional, Peña, E., additional, Percheron, I., additional, Puglisi, A., additional, Quanz, S. P., additional, Rabien, S., additional, Rau, C., additional, Riccardi, A., additional, Salasnich, B., additional, Schmid, H.-M., additional, Schubert, J., additional, Serra, B., additional, Shimizu, T., additional, Snik, F., additional, Sturm, E., additional, Tacconi, L., additional, Taylor, W., additional, Valentini, A., additional, Waring, C., additional, Wiezorrek, E., additional, and Xompero, M., additional

Published
2023
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5. The SOUL view of IRAS 20126+4104

Author

Massi, F., primary, Caratti o Garatti, A., additional, Cesaroni, R., additional, Sridharan, T. K., additional, Ghose, E., additional, Pinna, E., additional, Beltrán, M. T., additional, Leurini, S., additional, Moscadelli, L., additional, Sanna, A., additional, Agapito, G., additional, Briguglio, R., additional, Christou, J., additional, Esposito, S., additional, Mazzoni, T., additional, Miller, D., additional, Plantet, C., additional, Power, J., additional, Puglisi, A., additional, Rossi, F., additional, Rothberg, B., additional, Taylor, G., additional, and Veillet, C., additional

Published
2023
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6. The SOUL view of IRAS 20126+4104: Kinematics and variability of the H2 jet from a massive protostar.

Author

Massi, F., Garatti, A. Caratti, Cesaroni, R., Sridharan, T. K., Ghose, E., Pinna, E., Beltrán, M. T., Leurini, S., Moscadelli, L., Sanna, A., Agapito, G., Briguglio, R., Christou, J., Esposito, S., Mazzoni, T., Miller, D., Plantet, C., Power, J., Puglisi, A., and Rossi, F.

Subjects
KINEMATICS, SOUL, RANGE of motion of joints, MASERS, PROTOSTARS, INFRARED imaging, STELLAR rotation
Abstract

Context. We exploit the increased sensitivity of the recently installed adaptive optics SOUL at the LBT to obtain new high-spatialresolution near-infrared images of the massive young stellar object IRAS20126+4104 and its outflow. Aims. We aim to derive the jet proper motions and kinematics, as well as to study its photometric variability by combining the novel performances of SOUL together with previous near-infrared images. Methods. We used both broad-band (Ks, K') and narrow-band (Br H2) observations from a number of near-infrared cameras (UKIRT/UFTI, SUBARU/CIAO, TNG/NICS, LBT/PISCES, and LBT/LUCI1) to derive maps of the continuum and the H2 emission in the 2.12 µm line. Three sets of images, obtained with adaptive optics (AO) systems (CIAO, in 2003; FLAO, in 2012; SOUL, in 2020), allowed us to derive the proper motions of a large number of H2 knots along the jet. Photometry from all images was used to study the jet variability. Results. We derived knot proper motions in the range of 1.7-20.3 mas yr-1 (i.e. 13-158 km s-1 at 1.64 kpc), implying an average outflow tangential velocity of ~80 km s-1. The derived knot dynamical age spans a ~200-4000 yr interval. A ring-like H2 feature near the protostar location exhibits peculiar kinematics and may represent the outcome of a wide-angle wind impinging on the outflow cavity. Both H2 geometry and velocities agree with those inferred from proper motions of the H2O masers, located at a smaller distance from the protostar. Although the total H2 line emission from the knots does not exhibit time variations at a >~0.3 mag level, we have found a clear continuum flux variation (radiation scattered by the dust in the cavity opened by the jet) which is anti-correlated between the blue-shifted and red-shifted lobes and may be periodic (with a period of ~12-18 yr). We suggest that the continuum variability might be related to inner-disc oscillations which have also caused the jet precession. Conclusions. Our analysis shows that multi-epoch high-spatial-resolution imaging in the near-infrared is a powerful tool to unveil the physical properties of highly embedded massive protostars. [ABSTRACT FROM AUTHOR]

Published
2023
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9. ARGOS at the LBT

Author

Rabien, S., primary, Angel, R., additional, Barl, L., additional, Beckmann, U., additional, Busoni, L., additional, Belli, S., additional, Bonaglia, M., additional, Borelli, J., additional, Brynnel, J., additional, Buschkamp, P., additional, Cardwell, A., additional, Contursi, A., additional, Connot, C., additional, Davies, R., additional, Deysenroth, M., additional, Durney, O., additional, Eisenhauer, F., additional, Elberich, M., additional, Esposito, S., additional, Frye, B., additional, Gaessler, W., additional, Gasho, V., additional, Gemperlein, H., additional, Genzel, R., additional, Georgiev, I. Y., additional, Green, R., additional, Hart, M., additional, Kohlmann, C., additional, Kulas, M., additional, Lefebvre, M., additional, Mazzoni, T., additional, Noenickx, J., additional, Orban de Xivry, G., additional, Ott, T., additional, Peter, D., additional, Puglisi, A., additional, Qin, Y., additional, Quirrenbach, A., additional, Raab, W., additional, Rademacher, M., additional, Rahmer, G., additional, Rosensteiner, M., additional, Rix, H. W., additional, Salinari, P., additional, Schwab, C., additional, Sivitilli, A., additional, Steinmetz, M., additional, Storm, J., additional, Veillet, C., additional, Weigelt, G., additional, and Ziegleder, J., additional

Published
2018
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10. LBT/ARGOS adaptive optics observations of z ∼ 2 lensed galaxies

Author

Perna, M., primary, Curti, M., additional, Cresci, G., additional, Mannucci, F., additional, Rabien, S., additional, Grillo, C., additional, Belli, S., additional, Bonaglia, M., additional, Busoni, L., additional, Contursi, A., additional, Esposito, S., additional, Georgiev, I., additional, Lutz, D., additional, Orban de Xivry, G., additional, Zibetti, S., additional, Gaessler, W., additional, Mazzoni, T., additional, Borelli, J., additional, Rosensteiner, M., additional, Ziegleder, J., additional, Buschkamp, P., additional, Rahmer, G., additional, Kulas, M., additional, Peter, D., additional, Raab, W., additional, Deysenroth, M., additional, and Gemperlein, H., additional

Published
2018
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11. ARGOS at the LBT: Binocular laser guided ground-layer adaptive optics.

Author

Rabien, S., Angel, R., Barl, L., Beckmann, U., Busoni, L., Belli, S., Bonaglia, M., Borelli, J., Brynnel, J., Buschkamp, P., Cardwell, A., Contursi, A., Connot, C., Davies, R., Deysenroth, M., Durney, O., Eisenhauer, F., Elberich, M., Esposito, S., and Frye, B.

Subjects
RAYLEIGH number, GALACTIC nuclei, SPECTRUM analysis, WAVEFRONTS (Optics)
Abstract

Having completed its commissioning phase, the Advanced Rayleigh guided Ground-layer adaptive Optics System (ARGOS) facility is coming online for scientific observations at the Large Binocular Telescope (LBT). With six Rayleigh laser guide stars in two constellations and the corresponding wavefront sensing, ARGOS corrects the ground-layer distortions for both LBT 8.4 m eyes with their adaptive secondary mirrors. Under regular observing conditions, this set-up delivers a point spread function (PSF) size reduction by a factor of 2–3 compared to a seeing-limited operation. With the two LUCI infrared imaging and multi-object spectroscopy instruments receiving the corrected images, observations in the near-infrared can be performed at high spatial and spectral resolution. We discuss the final ARGOS technical set-up and the adaptive optics performance. We show that imaging cases with ground-layer adaptive optics (GLAO) are enhancing several scientific programmes, from cluster colour magnitude diagrams and Milky Way embedded star formation, to nuclei of nearby galaxies or extragalactic lensing fields. In the unique combination of ARGOS with the multi-object near-infrared spectroscopy available in LUCI over a 4 × 4 arcmin field of view, the first scientific observations have been performed on local and high-z objects. Those high spatial and spectral resolution observations demonstrate the capabilities now at hand with ARGOS at the LBT. [ABSTRACT FROM AUTHOR]

Published
2019
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12. The LEECH Exoplanet Imaging Survey. Further constraints on the planet architecture of the HR 8799 system(Corrigendum)

Author

Maire, A.-L., primary, Skemer, A. J., additional, Hinz, P. M., additional, Desidera, S., additional, Esposito, S., additional, Gratton, R., additional, Marzari, F., additional, Skrutskie, M. F., additional, Biller, B. A., additional, Defrère, D., additional, Bailey, V. P., additional, Leisenring, J. M., additional, Apai, D., additional, Bonnefoy, M., additional, Brandner, W., additional, Buenzli, E., additional, Claudi, R. U., additional, Close, L. M., additional, Crepp, J. R., additional, De Rosa, R. J., additional, Eisner, J. A., additional, Fortney, J. J., additional, Henning, T., additional, Hofmann, K.-H., additional, Kopytova, T. G., additional, Males, J. R., additional, Mesa, D., additional, Morzinski, K. M., additional, Oza, A., additional, Patience, J., additional, Pinna, E., additional, Rajan, A., additional, Schertl, D., additional, Schlieder, J. E., additional, Su, K. Y. L., additional, Vaz, A., additional, Ward-Duong, K., additional, Weigelt, G., additional, and Woodward, C. E., additional

Published
2015
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13. LBT observations of the HR 8799 planetary system

Author

Esposito, S., primary, Mesa, D., additional, Skemer, A., additional, Arcidiacono, C., additional, Claudi, R. U., additional, Desidera, S., additional, Gratton, R., additional, Mannucci, F., additional, Marzari, F., additional, Masciadri, E., additional, Close, L., additional, Hinz, P., additional, Kulesa, C., additional, McCarthy, D., additional, Males, J., additional, Agapito, G., additional, Argomedo, J., additional, Boutsia, K., additional, Briguglio, R., additional, Brusa, G., additional, Busoni, L., additional, Cresci, G., additional, Fini, L., additional, Fontana, A., additional, Guerra, J. C., additional, Hill, J. M., additional, Miller, D., additional, Paris, D., additional, Pinna, E., additional, Puglisi, A., additional, Quiros-Pacheco, F., additional, Riccardi, A., additional, Stefanini, P., additional, Testa, V., additional, Xompero, M., additional, and Woodward, C., additional

Published
2012
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18. LBT observations of the HR8799 planetary system First detection of HR8799e in H band.

Author

Esposito, S., Mesa, D., Skemer, A., Arcidiacono, C., Claudi, R. U., Desidera, S., Gratton, R., Mannucci, F., Marzari, F., Masciadri, E., Close, L., Hinz, P., Kulesa, C., McCarthy, D., Males, J., Agapito, G., Argomedo, J., Boutsia, K., Briguglio, R., and Brusa, G.

Subjects
*PLANETS, *TELESCOPES, *ORBITS (Astronomy), *AGE of stars, *ASTRONOMY, *ASTROPHYSICS
Abstract

We have performed H and KS band observations of the planetary system around HR8799 using the new AO system at the Large Binocular Telescope and the PISCES Camera. The excellent instrument performance (Strehl ratios up to 80% in H band) enabled the detection of the innermost planet, HR 8799e, at H band for the first time. The H and KS magnitudes of HR8799e are similar to those of planets c and d, with planet e being slightly brighter. Therefore, HR8799e is likely slightly more massive than c and d. We also explored possible orbital configurations and their orbital stability. We confirm that the orbits of planets b, c and e are consistent with being circular and coplanar; planet d should have either an orbital eccentricity of about 0.1 or be non-coplanar with respect to b and c. Planet e can not be in circular and coplanar orbit in a 4:2:1 mean motion resonances with c and d, while coplanar and circular orbits are allowed for a 5:2 resonance. The analysis of dynamical stability shows that the system is highly unstable or chaotic when planetary masses of about 5 MJ for b and 7 MJ for the other planets are adopted. Significant regions of dynamical stability for timescales of tens of Myr are found when adopting planetary masses of about 3.5, 5, 5, and 5 MJ for HR8799b, c, d, and e respectively. These masses are below the current estimates based on the stellar age (30 Myr) and theoretical models of substellar objects. [ABSTRACT FROM AUTHOR]

Published
2013
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19. A new dielectric effect in viscous liquids

Author

Vittorio Capano, Salvatore Esposito, G. Salesi, Capano, V., Esposito, S., and Salesi, G.

Subjects
education, FOS: Physical sciences, Thermodynamics, Dielectric, Condensed Matter - Soft Condensed Matter, Viscous liquid, Physics::Fluid Dynamics, Dielectric properties of solids and liquids, Spurious relationship, Instrumentation, atomic and molecular clusters, metastable phases, liquid-liquid transitions, Physics, Settore FIS/01 - Fisica Sperimentale, Fluid Dynamics (physics.flu-dyn), Time evolution, Physics - Fluid Dynamics, Mechanics, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici, Soft Condensed Matter (cond-mat.soft), Maxima, Phenomenology (particle physics)
Abstract

An accurate experimental and theoretical study has been performed about a phenomenon, not previously reported in the literature, occurring in highly viscous liquids: the formation of a definite pipe structure induced by the passage of a heavy body, this structure lasting for quite a long time. A very rich phenomenology (including mechanical, optical and structural effects) associated with the formation of the pipe has been observed in different liquids. Actually, the peculiar dynamical evolution of that structure does not appear as a trivial manifestation of standard relaxation or spurious effects. In particular we have revealed different time scales during the evolution of the pipe and a non-monotonous decrease of the persistence time with decreasing viscosity (with the appearance of at least two different maxima). We put forward a microscopic model, consistent with the experimental data, where the pipe behaves as a "dielectric shell" whose time evolution is described through a simple thermodynamical approach, predicting several properties effectively observed., 14 pages, 6 figures. arXiv admin note: text overlap with arXiv:0812.4361

Published
2013

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