2020A&A...638A...5C


Query : 2020A&A...638A...5C

2020A&A...638A...5C - Astronomy and Astrophysics, volume 638A, 5-5 (2020/6-1)

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.

CARLEO I., MALAVOLTA L., LANZA A.F., DAMASSO M., DESIDERA S., BORSA F., MALLONN M., PINAMONTI M., GRATTON R., ALEI E., BENATTI S., MANCINI L., MALDONADO J., BIAZZO K., ESPOSITO M., FRUSTAGLI G., GONZALEZ-ALVAREZ E., MICELA G., SCANDARIATO G., SOZZETTI A., AFFER L., BIGNAMINI A., BONOMO A.S., CLAUDI R., COSENTINO R., COVINO E., FIORENZANO A.F.M., GIACOBBE P., HARUTYUNYAN A., LETO G., MAGGIO A., MOLINARI E., NASCIMBENI V., PAGANO I., PEDANI M., PIOTTO G., PORETTI E., RAINER M., REDFIELD S., BAFFA C., BARUFFOLO A., BUCHSCHACHER N., BILLOTTI V., CECCONI M., FALCINI G., FANTINEL D., FINI L., GALLI A., GHEDINA A., GHINASSI F., GIANI E., GONZALEZ C., GONZALEZ M., GUERRA J., HERNANDEZ DIAZ M., HERNANDEZ N., IUZZOLINO M., LODI M., OLIVA E., ORIGLIA L., PEREZ VENTURA H., PUGLISI A., RIVEROL C., RIVEROL L., SAN JUAN J., SANNA N., SCUDERI S., SEEMANN U., SOZZI M. and TOZZI A.

Abstract (from CDS):


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.
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.
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.
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.

Abstract Copyright: © ESO 2020

Journal keyword(s): instrumentation: spectrographs - planetary systems - techniques: spectroscopic - stars: activity - techniques: radial velocities

VizieR on-line data: <Available at CDS (J/A+A/638/A5): hd2855-h.dat hd2855-g.dat adleo-h1.dat adleo-h2.dat adleo-g1.dat adleo-g2.dat adleo-sv.dat adleo-si.dat>

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 EPIC 210818897 b Pl 04 05 19.5912137335 +20 09 25.563534185           ~ 18 0
2 HD 285507b Pl 04 07 01.2254128574 +15 20 06.108426912           ~ 13 0
3 HD 285507 PM* 04 07 01.2255871032 +15 20 06.105707556   11.670 10.473     K4 71 0
4 V* V1069 Tau Or* 04 18 51.7036254480 +17 23 16.582694856   13.32 12.22 12.22 10.944 K7e 117 0
5 Cl Melotte 25 OpC 04 29 47 +16 56.9           ~ 2861 0
6 NAME V830 Tau b Pl 04 33 10.0299730541 +24 33 43.255853678           ~ 30 0
7 NAME CI Tau b Pl 04 33 52.0144455735 +22 50 30.093741884           ~ 22 0
8 CVSO 30 TT* 05 25 07.5568292771 +01 34 24.357042405     16.26 15.88 13.70 M3 53 1
9 BD+20 1790 BY* 07 23 43.5893479416 +20 24 58.650645816   11.08 10.001 9.43 8.522 K5e 85 0
10 BD+20 2465 Er* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1232 0
11 K2-33b Pl 16 10 14.7378782154 -19 19 09.407200797           ~ 49 0
12 * 51 Peg b Pl 22 57 27.9804167474 +20 46 07.782240714           ~ 595 1
13 HD 222259A RS* 23 39 39.4808078664 -69 11 44.707735104   9.161 8.226 9.28 7.352 G6V 113 0

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2022.08.10-19:46:26

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