2015A&A...575A..36M


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.21CEST00:52:57

2015A&A...575A..36M - Astronomy and Astrophysics, volume 575A, 36-36 (2015/3-1)

Bayesian mass and age estimates for transiting exoplanet host stars.

MAXTED P.F.L., SERENELLI A.M. and SOUTHWORTH J.

Abstract (from CDS):

The mean density of a star transited by a planet, brown dwarf or low mass star can be accurately measured from its light curve. This measurement can be combined with other observations to estimate its mass and age by comparison with stellar models. Our aim is to calculate the posterior probability distributions for the mass and age of a star given its density, effective temperature, metallicity and luminosity. We computed a large grid of stellar models that densely sample the appropriate mass and metallicity range. The posterior probability distributions are calculated using a Markov-chain Monte-Carlo method. The method has been validated by comparison to the results of other stellar models and by applying the method to stars in eclipsing binary systems with accurately measured masses and radii. We have explored the sensitivity of our results to the assumed values of the mixing-length parameter, αMLT, and initial helium mass fraction, Y. For a star with a mass of 0.9M and an age of 4Gyr our method recovers the mass of the star with a precision of 2% and the age to within 25% based on the density, effective temperature and metallicity predicted by a range of different stellar models. The masses of stars in eclipsing binaries are recovered to within the calculated uncertainties (typically 5%) in about 90% of cases. There is a tendency for the masses to be underestimated by about 0.1M for some stars with rotation periods Prot < 7 d. Our method makes it straightforward to determine accurately the joint posterior probability distribution for the mass and age of a star eclipsed by a planet or other dark body based on its observed properties and a state-of-the art set of stellar models.

Abstract Copyright:

Journal keyword(s): stars: solar-type - binaries: eclipsing - planetary systems

VizieR on-line data: <Available at CDS (J/A+A/575/A36): bagemass.tgz>

Simbad objects: 33

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Number of rows : 33

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 WASP-32 * 00 15 50.8077849942 +01 12 01.586829951   12.06 11.26 11.63 10.89 ~ 31 1
2 * 21 Cas Al* 00 45 39.0741754240 +74 59 17.056290402   5.717 5.652     A2IV 198 0
3 V* V785 Cep WU* 00 52 37.6792486449 +85 10 34.659827178 15.549 15.432 14.759 14.318 13.945 ~ 28 0
4 V* AI Phe Al* 01 09 34.1924817079 -46 15 56.074292976   9.26 8.60     G3V 117 0
5 V* CO And Al* 01 11 24.8498100707 +46 57 49.454259348   11.25 10.77 10.500   F8 38 0
6 V* CD Tau Al* 05 17 31.1528698885 +20 07 54.627827550 7.27 7.25 6.76     A5:IapHIwk: 152 0
7 V* EW Ori Al* 05 20 09.1432211267 +02 02 40.005405115   10.47 9.78     F8 83 0
8 V* UX Men Al* 05 30 03.1866927465 -76 14 55.350072672   8.80 8.24   7.608 F8V 105 0
9 V* GX Gem bL* 06 46 09.1273976754 +34 24 52.796451864   11.99 11.71     G5 51 0
10 CoRoT 102918586 EB* 06 48 54.3084 -00 52 22.875   12.74 12.32 12.34   A5IV 20 0
11 HAT-P-13 * 08 39 31.8073600797 +47 21 07.275628863   11.15 10.42 10.40   G4 107 2
12 V* KX Cnc Al* 08 42 46.2119814917 +31 51 45.364550430   7.76 7.19   6.51 F8 40 0
13 HD 80606 PM* 09 22 37.5769478105 +50 36 13.434928660   9.78 9.00     G5 281 2
14 Qatar 2 * 13 50 37.4100427817 -06 48 14.419877691   14.0   13.45   K5V 41 1
15 V* V636 Cen Al* 14 16 57.9116991617 -49 56 42.366293617   9.70 9.09     G0V 78 0
16 V* WZ Oph Al* 17 06 39.0448308226 +07 46 57.800270428   9.66 9.12     F8 111 0
17 V* LV Her Al* 17 35 32.4058769882 +23 10 30.504139569   11.67 10.97     G5 37 0
18 TYC 459-892-1 Al* 18 43 16.9525916455 +05 58 00.217779963   12.68 12.21 11.83   ~ 16 0
19 TYC 3130-2385-1 Al* 18 48 38.0889273281 +44 29 09.853475372   12.18 11.33     ~ 39 0
20 V* V565 Lyr Al* 19 20 49.10 +37 46 09.3   18.612 17.658 17.197   ~ 20 0
21 V* V568 Lyr Al* 19 20 57.3348146938 +37 45 36.743272555   18.295   16.823   ~ 36 0
22 KOI-6667 Al* 19 37 06.9701122978 +41 26 12.800099012           G5V 26 0
23 KOI-2937.02 Pl 19 37 59.2726236478 +46 41 22.952068619           ~ 70 1
24 KOI-2937 Al* 19 37 59.2726236478 +46 41 22.952068619           ~ 99 1
25 NGC 6819 OpC 19 41 18 +40 11.2   8.21 7.3     ~ 440 0
26 NGC 6819 259 Al* 19 41 33.9266701033 +40 13 00.248112786   16.356 15.651   14.774 ~ 26 1
27 KOI-2459 Al* 19 45 44.5975310719 +44 38 29.612454271           ~ 114 1
28 HD 189733 BY* 20 00 43.7130382888 +22 42 39.071811263 9.241 8.578 7.648 7.126 6.68 K0V+M4V 689 1
29 V* EK Cep Al* 21 41 21.5039950844 +69 41 34.108387051   7.95 7.89     A0V 197 0
30 V* V376 Peg EP* 22 03 10.7729598762 +18 53 03.548248479   8.21 7.63     F9V 968 1
31 V* BW Aqr Al* 22 23 15.9304389455 -15 19 56.201677729   10.8 10.3     F7 88 0
32 WASP-52 * 23 13 58.7575814237 +08 45 40.571306719   12.9 12.0 12.03   K2V 36 1
33 V* BK Peg Al* 23 47 08.4666003233 +26 33 59.968086314   10.46 10.04     F8 62 0

    Equat.    Gal    SGal    Ecl

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2019.10.21-00:52:57

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