no code implementations • 18 Feb 2021 • B. Toledo-Padrón, A. Suárez Mascareño, J. I. González Hernández, R. Rebolo, M. Pinamonti, M. Perger, G. Scandariato, M. Damasso, A. Sozzetti, J. Maldonado, S. Desidera, I. Ribas, G. Micela, L. Affer, E. González-Alvarez, G. Leto, I. Pagano, R. Zanmar Sánchez, P. Giacobbe, E. Herrero, J. C. Morales, P. J. Amado, J. A. Caballero, A. Quirrenbach, A. Reiners, M. Zechmeister
In this work, we perform a spectroscopic and photometric study of one of the program stars (GJ 740), which exhibits a short-period RV signal compatible with a planetary companion.
Time Series Analysis Earth and Planetary Astrophysics Solar and Stellar Astrophysics
no code implementations • 10 Feb 2021 • D. Mesa, S. Marino, M. Bonavita, C. Lazzoni, C. Fontanive, S. Perez, V. D'Orazi, S. Desidera, R. Gratton, N. Engler, T. Henning, M. Janson, Q. Kral, M. Langlois, S. Messina, J. Milli, N. Pawellek, C. Perrot, E. Rigliaco, E. Rickman, V. Squicciarini, A. Vigan, Z. Wahhaj, A. Zurlo, A. Boccaletti, M. Bonnefoy, G. Chauvin, V. De Caprio, M. Feldt, L. Gluck, J. Hagelberg, M. Keppler, A. -M. Lagrange, R. Launhardt, A. -L. Maire, M. Meyer, O. Moeller-Nilsson, A. Pavlov, M. Samland, T. Schmidt, L. Weber
We constrained the mass of possible companions responsible for the gap to 1-2 M Jup for planets located inside the gap and to less than 5 M Jup for separations down to 20 au from the host star.
Earth and Planetary Astrophysics Solar and Stellar Astrophysics
no code implementations • 21 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
no code implementations • 18 Dec 2020 • G. Scandariato, F. Borsa, D. Sicilia, L. Malavolta, K. Biazzo, A. S. Bonomo, G. Bruno, R. Claudi, E. Covino, P. Di Marcantonio, M. Esposito, G. Frustagli, A. F. Lanza, J. Maldonado, A. Maggio, L. Mancini, G. Micela, D. Nardiello, M. Rainer, V. Singh, A. Sozzetti, L. Affer, S. Benatti, A. Bignamini, V. Biliotti, R. Capuzzo-Dolcetta, I. Carleo, R. Cosentino, M. Damasso, S. Desidera, A. Garcia de Gurtubai, A. Ghedina, P. Giacobbe, E. Giani, A. Harutyunyan, N. Hernandez, M. Hernandez Diaz, C. Knapic, G. Leto, A. F. Martìnez Fiorenzano, E. Molinari, V. Nascimbeni, I. Pagano, M. Pedani, G. Piotto, E. Poretti, H. Stoev
To detect the light reflected by the planetary dayside we use optical HARPS and HARPS-N spectra taken near the superior conjunction of the planet, when the flux contrast between the planet and the star is maximum.
Earth and Planetary Astrophysics Solar and Stellar Astrophysics
no code implementations • 10 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