Search Results for author: A. Zurlo

Found 5 papers, 0 papers with code

A High-Contrast Search for Variability in HR 8799bc with VLT-SPHERE

no code implementations21 Jan 2021 B. A. Biller, D. Apai, M. Bonnefoy, S. Desidera, R. Gratton, M. Kasper, M. Kenworthy, A. M. Lagrange, C. Lazzoni, D. Mesa, A. Vigan, K. Wagner, J. M. Vos, A. Zurlo

To quantify our sensitivity to variability, we simulate variable lightcurves by inserting and retrieving a suite of simulated planets at similar radii from the star as HR 8799bc, but offset in position angle.

Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics

A survey of the linear polarization of directly imaged exoplanets and brown dwarf companions with SPHERE-IRDIS. First polarimetric detections revealing disks around DH Tau B and GSC 6214-210 B

no code implementations11 Jan 2021 R. G. van Holstein, T. Stolker, R. Jensen-Clem, C. Ginski, J. Milli, J. de Boer, J. H. Girard, Z. Wahhaj, A. J. Bohn, M. A. Millar-Blanchaer, M. Benisty, M. Bonnefoy, G. Chauvin, C. Dominik, S. Hinkley, C. U. Keller, M. Keppler, M. Langlois, S. Marino, F. Ménard, C. Perrot, T. O. B. Schmidt, A. Vigan, A. Zurlo, F. Snik

The presence of these disks as well as the misalignment of the disk of DH Tau B with the disk around its primary star suggest in situ formation of the companions.

Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics Solar and Stellar Astrophysics

Investigating three Sirius-like systems with SPHERE

no code implementations10 Dec 2020 R. Gratton, V. D'Orazi, T. A. Pacheco, A. Zurlo, S. Desidera, J. Melendez, D. Mesa, R. Claudi, M. Janson, M. Langlois, E. Rickman, M. Samland, T. Moulin, C. Soenke, E. Cascone, J. Ramos, F. Rigal, H. Avenhaus, J. L. Beuzit, B. Biller, A. Boccaletti, M. Bonavita, M. Bonnefoy, W. Brandner, G. Chauvin, M. Cudel, S. Daemgen, P. Delorme, C. Desgrange, N. Engler, M. Feldt, C. Fontanive, R. Galicher, A. Garufi, D. Gasparri, C. Ginski, J. Girard, J. Hagelberg, S. Hunziker, M. Kasper, M. Keppler, A. -M. Lagrange, J. Lannier, C. Lazzoni, H. Le Coroller, R. Ligi, M. Lombart, A. -L. Maire, M. R. Mayer, S. Mazevet, F. Menard, D. Mouillet, C. Perrot, S. Peretti, S. Petrus, A. Potier, D. Rouan, H. M. Schmid, T. O. B. Schmidt, E. Sissa, T. Stolker, G. Salter, A. Vigan, F. Wildi

The composition of the MS stars agrees fairly well with expectations from pollution by the AGB progenitors of the WDs: HD2133A has a small enrichment of n-capture elements, which is as expected for pollution by an AGB star with a mass <1. 5 Mo; CD-56 7708A is a previously unrecognized mild Ba-star, which is expected due to pollution by an AGB star with a mass in the range of 1. 5-3. 0 Mo; and HD114174 has a very moderate excess of n-capture elements, which is in agreement with the expectation for a massive AGB star to have a mass >3. 0 Mo.

Solar and Stellar Astrophysics

Insights into the planetary dynamics of HD 206893 with ALMA

no code implementations23 Oct 2020 S. Marino, A. Zurlo, V. Faramaz, J. Milli, Th. Henning, G. M. Kennedy, L. Matrà, S. Pérez, P. Delorme, L. A. Cieza, A. M. Hughes

The gap width suggests the presence of a 0. 9 M$_\mathrm{Jup}$ planet at 74 au, which would be the third companion in this system.

Earth and Planetary Astrophysics

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