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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31662
Title: The GAPS Programme at TNG. XXI. A GIARPS case study of known young planetary candidates: confirmation of HD 285507 b and refutation of AD Leonis b
Authors: Carleo, I.
Malavolta, L. 
LANZA, Antonino Francesco 
Damasso, Mario 
DESIDERA, Silvano 
BORSA, Francesco 
Mallonn, M.
Pinamonti, Matteo 
GRATTON, Raffaele 
Alei, E.
BENATTI, SERENA 
Mancini, L.
MALDONADO PRADO, Jesus 
BIAZZO, Katia 
Esposito, M.
FRUSTAGLI, GIUSEPPE 
González-Álvarez, E.
MICELA, Giuseppina 
SCANDARIATO, GAETANO 
SOZZETTI, Alessandro 
AFFER, Laura 
BIGNAMINI, ANDREA 
BONOMO, ALDO STEFANO 
CLAUDI, Riccardo 
COSENTINO, Rosario 
COVINO, Elvira 
Fiorenzano, A. F. M.
GIACOBBE, Paolo 
Harutyunyan, A.
LETO, Giuseppe 
MAGGIO, Antonio 
MOLINARI, Emilio Carlo 
NASCIMBENI, VALERIO 
PAGANO, Isabella 
Pedani, M.
Piotto, G.
PORETTI, Ennio 
RAINER, Monica 
Redfield, S.
BAFFA, Carlo 
BARUFFOLO, Andrea 
Buchschacher, N.
Billotti, V.
Cecconi, M.
FALCINI, Gilberto 
FANTINEL, Daniela 
Fini, L.
Galli, A.
Ghedina, A.
Ghinassi, F.
GIANI, Elisabetta 
Gonzalez, C.
Gonzalez, M.
Guerra, J.
Hernandez Diaz, M.
Hernandez, N.
Iuzzolino, M.
Lodi, M.
OLIVA, Ernesto 
ORIGLIA, Livia 
Perez Ventura, H.
PUGLISI, Alfio Timothy 
Riverol, C.
Riverol, L.
San Juan, J.
SANNA, Nicoletta 
SCUDERI, Salvatore 
Seemann, U.
Sozzi, M.
TOZZI, Andrea 
Issue Date: 2020
Journal: ASTRONOMY & ASTROPHYSICS 
Number: 638
First Page: A5
Abstract: Context. The existence of hot Jupiters is still not well understood. Two main channels are thought to be responsible for their current location: a smooth planet migration through the protoplanetary disk or the circularization of an initial highly eccentric orbit by tidal dissipation leading to a strong decrease in the semimajor axis. Different formation scenarios result in different observable effects, such as orbital parameters (obliquity and eccentricity) or frequency of planets at different stellar ages. <BR /> Aims: In the context of the GAPS Young Objects project, we are carrying out a radial velocity survey with the aim of searching and characterizing young hot-Jupiter planets. Our purpose is to put constraints on evolutionary models and establish statistical properties, such as the frequency of these planets from a homogeneous sample. <BR /> Methods: Since young stars are in general magnetically very active, we performed multi-band (visible and near-infrared) spectroscopy with simultaneous GIANO-B + HARPS-N (GIARPS) observing mode at TNG. This helps in dealing with stellar activity and distinguishing the nature of radial velocity variations: stellar activity will introduce a wavelength-dependent radial velocity amplitude, whereas a Keplerian signal is achromatic. As a pilot study, we present here the cases of two known hot Jupiters orbiting young stars: HD 285507 b and AD Leo b. <BR /> Results: Our analysis of simultaneous high-precision GIARPS spectroscopic data confirms the Keplerian nature of the variation in the HD 285507 radial velocities and refines the orbital parameters of the hot Jupiter, obtaining an eccentricity consistent with a circular orbit. Instead, our analysis does not confirm the signal previously attributed to a planet orbiting AD Leo. This demonstrates the power of the multi-band spectroscopic technique when observing active stars. <P />Photometry, RV, and time series are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/638/A5">http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/638/A5</A> <P />Based on observations made with the Italian Telescopio Nazionale Galileo (TNG) operated by the Fundación Galileo Galilei (FGG) of the Istituto Nazionale di Astrofisica (INAF) at the Observatorio del Roque de los Muchachos (La Palma, Canary Islands, Spain). Partly based on data obtained with the STELLA robotic telescopes in Tenerife, an AIP facility jointly operated by AIP and IAC.
URI: http://hdl.handle.net/20.500.12386/31662
URL: https://www.aanda.org/articles/aa/full_html/2020/06/aa37369-19/aa37369-19.html
http://arxiv.org/abs/2002.10562v1
ISSN: 0004-6361
DOI: 10.1051/0004-6361/201937369
Bibcode ADS: 2020A&A...638A...5C
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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