J/A+A/575/A111 GAPS V: Global analysis of the XO-2 system (Damasso+, 2015)
The GAPS Programme with HARPS-N at TNG.
V. A comprehensive analysis of the XO-2 stellar and planetary systems.
Damasso M., Biazzo K., Bonomo A.S., Desidera S., Lanza A.F., Nascimbeni V.,
Esposito M., Scandariato G., Sozzetti A., Cosentino R., Gratton R.,
Malavolta L., Rainer M., Gandolfi D., Poretti E., Zanmar Sanchez R.,
Ribas I., Santos N., Affer L., Andreuzzi G., Barbieri M., Bedin L.R.,
Benatti S., Bernagozzi A., Bertolini E., Bonavita M., Borsa F., Borsato L.,
Boschin W., Calcidese P., Carbognani A., Cenadelli D., Christille J.M.,
Claudi R.U., Covino E., Cunial A., Giacobbe P., Granata V., Harutyunyan A.,
Lattanzi M.G., Leto G., Libralato M., Lodato G., Lorenzi V., Mancini L.,
Martinez Fiorenzano A.F., Marzari F., Masiero S., Micela G., Molinari E.,
Molinaro M., Munari U., Murabito S., Pagano I., Pedani M., Piotto G.,
Rosenberg A., Silvotti R., Southworth J.
<Astron. Astrophys. 575, A111 (2015)>
=2015A&A...575A.111D 2015A&A...575A.111D
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry ;
Radial velocities
Keywords: stars: individual: XO-2 - stars: fundamental parameters -
stars: abundances - planetary systems -
techniques: radial velocities - techniques: photometric
Abstract:
XO-2 is the first confirmed wide stellar binary system where the
almost twin components XO-2N and XO-2S have planets, and it is a
peculiar laboratory in which to investigate the diversity of planetary
systems. This stimulated a detailed characterization study of the
stellar and planetary components based on new observations.
We collected high-resolution spectra with the HARPS-N spectrograph and
multi-band light curves. Spectral analysis led to an accurate
determination of the stellar atmospheric parameters and
characterization of the stellar activity, and high-precision radial
velocities of XO-2N were measured. We collected 14 transit light
curves of XO-2Nb used to improve the transit parameters. Photometry
provided accurate magnitude differences between the stars and a
measure of their rotation periods.
Description:
Photometric data of the two companion stars in the XO-2 binary system,
and radial velocities of XO-2N used in our analysis.
Transit light curves of XO-2N and related to its hot Jupiter XO-2Nb
come from the TASTE project (Nasimbeni et al., 2011A&A...527A..85N 2011A&A...527A..85N,
Cat. J/A+A/527/A85). Light curves of both XO-2N and XO-2S were
collected by the APACHE survey (e.g. Sozzetti et al., Hot Planets and
Cool Stars, EPJ Web of Conferences, Volume 47, id.03006, 2013) and
were used in particular to determine the rotation period of the two
binary components.
Radial velocities of XO-2N were measured with the HARPS-N spectrograph
at the Telescopio Nazionale Galileo (TNG), based at La Palma, Canary
islands.
Objects:
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RA (2000) DE Designation(s)
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07 48 06.47 +50 13 33.0 WDS J07481+5013B = XO-2N = TYC 3413-5-1
07 48 07.48 +50 13 03.3 WDS J07481+5013A = XO-2S = TYC 3413-210-1
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
xo2ntra.dat 37 27401 Transit light curves of XO-2N collected in R-band,
in the framework of the TASTE project, with the
facilities described in Table 4 (Fig.8 of paper)
xo2napa.dat 27 41 *Light-curve of the star XO-2N collected by the
APACHE survey in I-band (Fig. 6 in the paper)
xo2sapa.dat 27 42 *Light-curve of the star XO-2S collected by the
APACHE survey in I-band (Fig. 7 in the paper)
table7.dat 26 43 Radial velocities of the star XO-2N as measured
by the HARPS-N spectrograph
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Note on xo2napa.dat and xo2sapa.dat: Each point refers to one night and
represents the average of the measurements collected during that night.
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See also:
J/A+A/527/A85 : Light curves of HAT-P-3b and HAT-P-14b (Nascimbeni+, 2011)
J/A+A/554/A28 : Qatar-1 differential light curve (Covino+, 2013)
Byte-by-byte Description of file: xo2ntra.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d BJD Barycentric Julian Date (UTC)
18- 26 F9.6 mag dmag Differential magnitude in R-band
30- 37 F8.6 mag e_dmag Uncertainty associated to differential magnitude
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Byte-by-byte Description of file: xo2napa.dat xo2sapa.dat
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Bytes Format Units Label Explanations
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1- 11 F11.6 d HJD Heliocentric Julian Date (HJD-2456000)
14- 19 F6.4 mag dmag Differential magnitude in I-band
22- 27 F6.4 mag e_dmag Uncertainty associated to differential magnitude
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 11 F11.6 d BJD Barycentric Julian Date (UTC) (BJD-2450000)
13- 19 F7.4 km/s RV Radial velocity
21- 26 F6.4 km/s e_RV Uncertainty associated to radial velocity
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Acknowledgements:
Mario Damasso, damasso(at)oato.inaf.it
References:
Covino et al., Paper I 2013A&A...554A..28C 2013A&A...554A..28C, Cat. J/A+A/554/A28
Desidera et al., Paper II 2013A&A...554A..29D 2013A&A...554A..29D
Esposito et al., Paper III 2014A&A...564L..13E 2014A&A...564L..13E
Desidera et al., Paper IV 2014A&A...567L...6D 2014A&A...567L...6D
Sozzetti et al., Paper VI 2015A&A...575L..15S 2015A&A...575L..15S
(End) Patricia Vannier [CDS] 05-Jan-2015