J/A+A/554/A28 Qatar-1 differential light curve (Covino+, 2013)
The GAPS programme with HARPS-N at TNG.
I: Observations of the Rossiter-McLaughlin effect and characterisation of the
transiting system Qatar-1.
Covino E., Esposito M., Barbieri M., Mancini L., Nascimbeni V.,
Claudi R., Desidera S., Gratton R., Lanza A. F., Sozzetti A., Biazzo K.,
Affer L., Gandolfi D., Munari U., Pagano I., BonomoA. S., Collier
Cameron A., Hebrard G., Maggio A., Messina S., Micela G., Molinari E.,
Pepe F., Piotto G., Ribas I.,Santos N. C., Southworth J., Shkolnik E.,
Triaud A.H.M.J., Bedin L., Benatti S., Boccato C., Bonavita M.,
Borsa F., Borsato L., Brown D., Carolo E., Ciceri S., Cosentino R.,
Damasso M., Faedi F., Martinez Fiorenzano A. F., Latham D.W., Lovis C.,
Mordasini C., Nikolov N., Poretti E., Rainer M., Rebolo Lopez R.,
Scandariato G., Silvotti R., Smareglia R., Alcala J.M., Cunial A.,
Di Fabrizio L., Di Mauro M.P., Giacobbe P., Granata V., Harutyunyan A.,
Knapic C., Lattanzi M., Leto G., Lodato G., Malavolta L., Marzari F.,
Molinaro M., Nardiello D., Pedani M., Prisinzano L., Turrini D.
<Astron. Astrophys. 554, A28 (2013)>
=2013A&A...554A..28C 2013A&A...554A..28C
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry
Keywords: techniques: radial velocities - stars: late-type -
stars: fundamental parameters - stars: individual: Qatar-1
Abstract:
A long-term multi-purpose observational programme has started with
HARPS-N@TNG aimed to characterise the global architectural properties
of exoplanetary systems. In this first paper we fully characterise the
transiting system Qatar-1.
We exploit HARPS-N high-precision radial velocity measurements
obtained during a transit to measure the Rossiter-McLaughlin effect in
the Qatar-1 system, and out-of-transit measurements to redetermine the
spectroscopic orbit. New photometric transit light-curves are analysed
and a spectroscopic characterisation of the host star atmospheric
parameters is performed based on various methods (line equivalent
widths ratios, spectral synthesis, spectral energy distribution).
We achieved a significant improvement in the accuracy of the orbital
parameters and derived the spin-orbit alignment of the system; this
information, combined with the spectroscopic determination of the host
star properties, allows us to derive the fundamental physical
parameters for star and planet (masses and radii). The orbital
solution for the Qatar-1 system is consistent with a circular orbit
and the system presents a sky-projected obliquity of
lambda=-8.4±7.1°.
The planet, with a mass of 1.33±0.05MJ, is found to be
significantly more massive than previously reported. The host star is
confirmed to be metal-rich ([Fe/H]=0.20±0.10) and slowly rotating
(vsini=1.7±0.3km/s), though moderately active, as indicated by
strong chromospheric emission in the Ca II H&K line cores (logR'HK
about -4.60). The system is well aligned and fits well within the
general lambda vs Teff trend. We definitely rule out any significant
orbital eccentricity.
The evolutionary status of the system is inferred based on
gyrochronology, and the present orbital configuration and timescale
for orbital decay are discussed in terms of star-planet tidal
interactions.
Description:
R-band light curves of Qatar-1b transits obtained with the Asiago
1.82m and Calar Alto 1.23m telescopes.
Objects:
---------------------------------------------------------------------
RA (2000) DE Designation(s) (Period)
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20 13 31.62 +65 09 43.5 Qatar 1 = GSC 04240-00470 (P=1.42002504)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 54 646 Photometric data
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See also:
J/A+A/552/A119 : Planet-star and moon-planet interaction (Saur+, 2013)
J/MNRAS/422/2024 : X-ray-age relation & exoplanet evaporation (Jackson+, 2012)
J/PASP/123/412 : Exoplanet Orbit Database (Wright+, 2011)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Tel/LC Observing site and light-curve number
(Asiago or CA=Calar Alto)
16- 29 F14.8 d BJD [55711/56182] Barycentric Coordinate Time (TCB)
scale (SI units) (BJD-2400000)
32- 42 F11.8 mag dmag Differential magnitude (R-band)
45- 54 F10.8 mag e_dmag Error on Differential magnitude
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Acknowledgements:
Elvira Covino, covino(at)oacn.inaf.it
References:
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
Damasso et al., Paper V 2015A&A...575A.111D 2015A&A...575A.111D, Cat. J/A+A/575/A111
Sozzetti et al., Paper VI 2015A&A...575L..15S 2015A&A...575L..15S
(End) Elvira Covino [INAF-OAC Napoli, Italy], Patricia Vannier [CDS] 03-Apr-2013