2005A&A...431..707G


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.01CET07:09:15

2005A&A...431..707G - Astronomy and Astrophysics, volume 431, 707-720 (2005/2-4)

Characterisation of extrasolar planetary transit candidates.

GALLARDO J., MINNITI D., VALLS-GABAUD D. and REJKUBA M.

Abstract (from CDS):

The detection of transits is an efficient technique to uncover faint companions around stars. The full characterisation of the companions (M-type stars, brown dwarfs or exoplanets) requires high-resolution spectroscopy to measure properly masses and radii. With the advent of massive variability surveys over wide fields, the large number of possible candidates makes such a full characterisation for all of them impractical. We explore here a fast technique to pre-select the most promising candidates using either near-IR photometry or low resolution spectroscopy. We develop a new method based on the well-calibrated surface brightness relation along with the correlation between mass and luminosity for main sequence stars, so that not only can giant stars be excluded but also accurate effective temperatures and radii measured. The main source of uncertainty arises from the unknown dispersion of extinction at a given distance. We apply this technique to our observations of a sample of 34 stars extracted from the 62 low-depth transits identified by OGLE during their survey of some 105 stars in the Carina fields of the Galactic disc. We infer that at least 78% of the companions of the stars which are well characterised in this sample are not exoplanets. Stars OGLE-TR-105, OGLE-TR-109 and OGLE-TR-111 are the likeliest to host exoplanets and deserve high-resolution follow-up studies. Most recently, OGLE-TR-111 was confirmed as an exoplanet with Mplanet≃0.53 ±0.11MJup (Pont et al., 2004A&A...426L..15P), confirming the efficiency of our method in pre-selecting reliable planetary transit candidates.

Abstract Copyright:

Journal keyword(s): stars: planetary systems - stars: binaries: eclipsing - planets and satellites: general - techniques: photometric - Galaxy: structure - instrumentation: spectrographs

Simbad objects: 36

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Number of rows : 36

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* V741 Car Al* 10 50 24.6723048909 -61 26 12.412142476     15.529   14.90 ~ 6 0
2 V* V746 Car Al* 10 51 09.2122498467 -61 43 11.616228563     17.276   16.23 ~ 10 0
3 2MASS J10513197-6148087 * 10 51 31.97 -61 48 08.7         17.07 ~ 7 0
4 V* V748 Car Al* 10 51 40.37 -61 34 16.0     17.901   16.71 ~ 5 0
5 V* V749 Car Al* 10 51 58.6337722207 -61 41 20.840227713     14.701   14.29 ~ 6 0
6 V* V751 Car Al* 10 52 23.965 -61 31 09.49     16.93   15.99 ~ 10 0
7 V* V753 Car Al* 10 52 28.2560950409 -61 29 32.158437332     17.29   16.15 ~ 8 0
8 V* V754 Car Al* 10 52 46.3516146938 -61 23 17.966672316     14.466   13.64 ~ 7 0
9 V* V756 Car Al* 10 52 56.7982805689 -61 50 55.225616008     15.829   14.88 ~ 6 0
10 V* V757 Car Al* 10 52 58.4693166620 -61 51 43.440313942     17.665   16.69 ~ 5 0
11 V* V758 Car Al* 10 53 12.54 -61 30 19.1     18.683   17.28 ~ 8 0
12 OGLE-TR 111 V* 10 53 17.8066842748 -61 24 20.606379347     16.96 16.05 15.55 G 90 1
13 NAME OGLE-TR-111b Pl 10 53 17.8066842748 -61 24 20.606379347           ~ 109 1
14 V* V760 Car Al* 10 53 26.9194608125 -61 43 20.666686064     18.424   17.10 ~ 5 0
15 V* V761 Car Al* 10 53 29.5321864387 -61 47 37.545195727     15.183   13.84 ~ 6 0
16 V* V763 Car EB* 10 53 40.6211139327 -61 25 15.109446443     15.80   14.99 F0V 13 1
17 V* V764 Car Al* 10 53 51.1161914559 -61 34 13.651180974     17.71   16.53 ~ 21 0
18 V* V765 Car Al* 10 54 23.4790202745 -61 37 21.607182878     17.594   16.66 ~ 6 0
19 V* V768 Car Al* 10 55 12.67 -61 54 55.3     17.641   16.47 ~ 6 0
20 V* V770 Car Al* 10 55 19.2626464473 -61 32 12.336416649     17.618   16.36 ~ 6 0
21 V* V774 Car Al* 10 56 11.27 -61 29 55.4         15.78 ~ 7 0
22 V* V776 Car Al* 10 56 36.5142919225 -61 28 46.823950874     17.844   16.44 ~ 6 0
23 V* V778 Car Al* 10 56 51.6641488683 -61 56 15.433722480     17.549   16.64 ~ 7 0
24 V* V779 Car Al* 10 57 23.33 -61 26 45.8     17.703   16.50 ~ 5 0
25 V* V781 Car Al* 10 57 42.3722584433 -61 36 23.897300828     15.412   14.87 ~ 7 0
26 V* V784 Car Al* 10 57 54.2526052564 -61 42 03.022466508     17.489   16.50 ~ 5 0
27 V* V785 Car Al* 10 58 01.9229017364 -61 49 51.498371838     17.346   16.12 ~ 5 0
28 V* V788 Car Al* 10 58 41.7906666677 -61 53 12.877505649     14.261   13.76 ~ 7 0
29 V* V789 Car Al* 10 58 59.90 -61 34 43.5     17.774   16.69 ~ 7 0
30 V* V790 Car Al* 10 59 00.08 -61 37 41.7     16.611   15.45 ~ 7 0
31 V* V794 Car Al* 10 59 35.4392166397 -61 56 59.829554675     15.974   15.28 ~ 5 0
32 V* V795 Car Al* 10 59 39.2213335078 -61 24 07.811999481     17.603   16.32 ~ 6 0
33 V* V796 Car Al* 10 59 41.5132422969 -61 55 15.606390984     16.24   15.45 ~ 15 0
34 V* V5128 Sgr EB* 17 52 08.66 -29 56 12.1     15.900   14.79 ~ 17 0
35 V* V5129 Sgr EB* 17 52 18.58 -29 56 25.0     16.848   15.64 F9V 12 1
36 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1549 1

    Equat.    Gal    SGal    Ecl

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2021.03.01-07:09:15

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