2013A&A...556A..75G


C.D.S. - SIMBAD4 rel 1.7 - 2019.09.16CEST17:14:07

2013A&A...556A..75G - Astronomy and Astrophysics, volume 556A, 75-75 (2013/8-1)

High angular resolution imaging and infrared spectroscopy of CoRoT candidates.

GUENTHER E.W., FRIDLUND M., ALONSO R., CARPANO S., DEEG H.J., DELEUIL M., DREIZLER S., ENDL M., GANDOLFI D., GILLON M., GUILLOT T., JEHIN E., LEGER A., MOUTOU C., NORTMANN L., ROUAN D., SAMUEL B., SCHNEIDER J. and TINGLEY B.

Abstract (from CDS):

Studies of transiting extrasolar planets are of key importance for understanding the nature of planets outside our solar system because their masses, diameters, and bulk densities can be measured. An important part of transit-search programmes is the removal of false-positives. In the case of the CoRoT space mission, the majority of the false-positives are removed by a detailed analysis of the light curves and by seeing-limited imaging in- and out-of-transit. However, the critical question is how many of the candidates that passed all these tests are false-positives. Such false-positives can be caused by eclipsing binaries, which are either related or unrelated to the targets. For our study we selected 25 CoRoT candidates that have already been screened against false-positives using detailed analysis of the light curves and seeing-limited imaging, which has transits that are between 0.7 and 0.05% deep. Our aim is to search for companion candidates that had not been recognized in previous observations. We observed 20 candidates with the adaptive optics imager NaCo and 18 with the high-resolution infrared spectrograph CRIRES. We found previously unknown stars within 2" of the targets in seven of the candidates. All of these are too faint and too close to the targets to have been previously detected with seeing-limited telescopes in the optical. Our study thus leads to the surprising results that if we remove all candidates excluded by the sophisticated analysis of the light-curve, as well as carrying out deep imaging with seeing-limited telescopes, still 28-35% of the remaining candidates are found to possess companions that are bright enough to be false-positives. Given that the companion candidates cluster around the targets and that the J-K colours are consistent with physical companions, we conclude that the companion candidates are more likely to be physical companions rather than unrelated field stars.

Abstract Copyright:

Journal keyword(s): planetary systems - binaries: visual - binaries: eclipsing - binaries: general

CDS comments: Table B.1 stars not in Simbad (except 2MASS)

Simbad objects: 31

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Number of rows : 31

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 CoRoT 604178318 * 06 08 34.4981933361 +06 35 17.006230975           ~ 1 0
2 CoRoT 102296945 * 06 09 33.1533971742 +04 41 12.323272243           G8III 2 0
3 CoRoT 102352354 * 06 12 10.9897355177 +05 02 26.984783915           G8V 1 0
4 CoRoT 102387834 * 06 13 50.7631720951 +05 18 08.670385460           G0III 2 0
5 TYC 4792-1886-1 * 06 19 12.3836206436 -04 38 15.399299007   11.91 11.59 11.52 11.04 G0V 3 1
6 2MASS J06270624+0432238 * 06 27 06.2481158006 +04 32 23.852497268           B9V 1 0
7 CoRoT 221699621 * 06 29 30.1511968800 +06 16 30.661204460           K0V 1 0
8 CoRoT 315219144 * 06 29 48.5951505942 +00 03 51.116517392           G5V 1 0
9 CoRoT 315230397 * 06 31 23.7973564731 +00 09 23.909103128           K5III 1 0
10 CoRoT 102568803 * 06 40 33.1408190085 +00 16 58.890390131           K6III 2 0
11 CoRoT-32 gD* 06 40 46.8401086571 +09 15 26.693623106   14.40 13.72 13.82   K0V 3 0
12 CoRoT 102588881 * 06 41 07.7994378105 +00 34 15.093406313           K2V 3 0
13 CoRoT 102698887 * 06 43 37.3533861554 +00 16 51.411466918           G4IV 2 0
14 2MASS J06434244+0049473 * 06 43 42.440 +00 49 47.38           G2V 2 0
15 CoRoT-7 * 06 43 49.4690410679 -01 03 46.825797768   12.78 11.73 11.36 10.87 K0V 166 1
16 CoRoT-7b Pl 06 43 49.4690410679 -01 03 46.825797768           ~ 328 1
17 2MASS J06443588+0000283 RG* 06 44 35.8878451312 +00 00 28.306059240   14.415 13.295 12.807 12.178 K6III 6 0
18 CoRoT 102770212 * 06 45 13.7775942197 -00 53 26.649734796           K3III 2 0
19 CoRoT-24 * 06 47 41.4116571586 -03 43 09.483794512       15.60 14.30 ~ 12 1
20 CoRoT 110838244 * 06 50 50.2643999820 -05 00 35.752176482           F8IV 1 0
21 CoRoT 110752102 V* 06 51 18.0473934620 -03 22 15.205773009     14.842     G8V 2 0
22 2MASS J06512856-0348468 IR 06 51 28.5494697130 -03 48 46.629908848           ~ 1 0
23 UCAC4 431-022970 V* 06 51 29.0064954641 -03 49 03.464309606   14.69 14.19 14.15   A5V 3 0
24 CoRoT 110847700 * 06 51 48.6342158972 -05 27 35.425855435           G2IV 1 0
25 CoRoT 110676555 * 06 51 59.0892248966 -05 36 48.873557448     13.953     G8V 2 0
26 2MASS J06515971-0536425 IR 06 51 59.7217495289 -05 36 42.641886980           ~ 1 0
27 CoRoT 631423929 * 18 34 29.8722425158 +06 52 46.500076389           F8IV 1 0
28 2MASS J18423960+0613053 IR 18 42 39.6078835842 +06 13 05.443482156           ~ 1 0
29 2MASS J18423986+0613198 IR 18 42 39.8610515744 +06 13 20.192100169           ~ 1 0
30 CoRoT-22 * 18 42 40.1113034633 +06 13 08.983433472   14.740 13.944 14.03   G8V 5 1
31 2MASS J18424088+0613117 IR 18 42 40.8940957525 +06 13 11.817314156           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2019.09.16-17:14:07

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