2010A&A...523A..91G


Query : 2010A&A...523A..91G

2010A&A...523A..91G - Astronomy and Astrophysics, volume 523, A91-91 (2010/11-2)

Stellar characterization of CoRoT/Exoplanet fields with MATISSE.

GAZZANO J.-C., DE LAVERNY P., DELEUIL M., RECIO-BLANCO A., BOUCHY F., MOUTOU C., BIJAOUI A., ORDENOVIC C., GANDOLFI D. and LOEILLET B.

Abstract (from CDS):

The homogeneous spectroscopic determination of the stellar parameters is a mandatory step for transit detections from space. Knowledge of which population the planet hosting stars belong to places constraints on the formation and evolution of exoplanetary systems. We used the FLAMES/GIRAFFE multi-fiber instrument at ESO to spectroscopically observe samples of stars in three CoRoT/Exoplanet fields, namely the LRa01, LRc01, and SRc01 fields, and characterize their stellar populations. We present accurate atmospheric parameters, Teff, log g, [M/H], and [α/Fe] derived for 1227 stars in these fields using the MATISSE algorithm. The latter is based on the spectral synthesis methodology and automatically provides stellar parameters for large samples of observed spectra. We trained and applied this algorithm to FLAMES observations covering the MgI b spectral range. It was calibrated on reference stars and tested on spectroscopic samples from other studies in the literature. The barycentric radial velocities and an estimate of the Vsini values were measured using cross-correlation techniques. We corrected our samples in the LRc01 and LRa01 CoRoT fields for selection effects to characterize their FGK dwarf stars population, and compiled the first unbiased reference sample for the in-depth study of planet metallicity relationship in these CoRoT fields. We conclude that the FGK dwarf population in these fields mainly exhibit solar metallicity. We show that for transiting planet finding missions, the probability of finding planets as a function of metallicity could explain the number of planets found in the LRa01 and LRc01 CoRoT fields. This study demonstrates the potential of multi-fiber observations combined with an automated classifier such as MATISSE for massive star spectral classification.

Abstract Copyright:

Journal keyword(s): techniques: spectroscopic - stars: fundamental parameters - planetary systems - stars: general

VizieR on-line data: <Available at CDS (J/A+A/523/A91): table4.dat table9.dat table9.fits table10.dat table11.dat table13.dat>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 25

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Number of rows : 25
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 HD 400 PM* 00 08 40.9385785968 +36 37 37.652234016       5.9   F8IV 158 0
2 * 9 Cet BY* 00 22 51.7884553555 -12 12 33.969921319 7.29 7.05 6.39     G2.5V 467 0
3 * eps Eri BY* 03 32 55.8444911587 -09 27 29.739493865 5.19 4.61 3.73 3.00 2.54 K2V 1808 1
4 * 10 Tau PM* 03 36 52.3837044168 +00 24 05.992097829 5.23 5.15 4.30 4.09 3.77 F9IV-V 543 0
5 HD 30562 PM* 04 48 36.3850851388 -05 40 26.557737782   6.40 5.77     G2IV 238 1
6 NAME Gal Anticenter reg 05 46 +28.9           ~ 823 0
7 * alf CMi SB* 07 39 18.11950 +05 13 29.9552 0.82 0.79 0.37 -0.05 -0.28 F5IV-V+DQZ 1825 0
8 HD 76932 PM* 08 58 43.9327642391 -16 07 57.817644364 6.47 6.39 5.86     G2VFe-1.8CH-1 381 0
9 IC 2714 110 * 11 17 30.5748059376 -62 42 27.318268728   12.73 11.73     ~ 13 0
10 IC 2714 87 * 11 17 46.8476688864 -62 36 49.492415592   12.602 11.395     ~ 17 0
11 * e Vir PM* 13 16 46.5148594512 +09 25 26.960139646   5.81   4.8   G0V 529 1
12 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2232 0
13 * sig Boo PM* 14 34 40.8173867232 +29 44 42.457673940 4.76 4.84 4.47 4.13 3.94 F4VkF2mF1 588 0
14 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13094 0
15 CoRoT 100565715 * 19 23 15.1780362624 +01 21 19.381852260       15.537   ~ 1 0
16 CoRoT 100567221 V* 19 23 15.7083740184 +01 26 28.526071704   15.078 14.090 13.826   ~ 2 0
17 CoRoT 100576988 * 19 23 19.2228819288 +01 21 52.717356756           ~ 2 0
18 CoRoT 100577769 * 19 23 19.4981589912 +01 22 48.481763880       16.105   ~ 1 0
19 CoRoT 100583300 Ro* 19 23 21.4770891120 +01 27 36.467391276   15.118 14.109 13.932   ~ 2 0
20 CoRoT 100588558 EB* 19 23 23.3755654608 +01 22 39.243846684   16.666 15.528 15.329 14.268 ~ 3 0
21 CoRoT 100603128 V* 19 23 28.6128489600 +01 25 51.458061756     16.428     ~ 4 0
22 CoRoT 100604545 * 19 23 29.0855848660 +01 24 42.700016388       15.83   ~ 1 0
23 CoRoT 100634976 * 19 23 39.2155014792 +01 25 04.991509992       16.169   ~ 1 0
24 CoRoT 100636016 * 19 23 39.5472921096 +01 27 06.371551116   17.136 15.897 16.154   ~ 1 0
25 CoRoT 100637229 SB* 19 23 39.9623122560 +01 27 51.914670012   14.597 13.8 13.561   ~ 2 0

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2022.08.15-15:53:36

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