2014A&A...562A..50G


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.20CEST20:06:06

2014A&A...562A..50G - Astronomy and Astrophysics, volume 562A, 50-50 (2014/2-1)

CoRoT 223992193: A new, low-mass, pre-main sequence eclipsing binary with evidence of a circumbinary disk.

GILLEN E., AIGRAIN S., McQUILLAN A., BOUVIER J., HODGKIN S., ALENCAR S.H.P., TERQUEM C., SOUTHWORTH J., GIBSON N.P., CODY A., LENDL M., MORALES-CALDERON M., FAVATA F., STAUFFER J. and MICELA G.

Abstract (from CDS):

We present the discovery of CoRoT 223992193, a double-lined, detached eclipsing binary, comprising two pre-main sequence M dwarfs, discovered by the CoRoT space mission during a 23-day observation of the 3Myr old NGC 2264 star-forming region. Using multi-epoch optical and near-IR follow-up spectroscopy with FLAMES on the Very Large Telescope and ISIS on the William Herschel Telescope we obtain a full orbital solution and derive the fundamental parameters of both stars by modelling the light curve and radial velocity data. The orbit is circular and has a period of 3.8745745±0.0000014 days. The masses and radii of the two stars are 0.67±0.01 and 0.495±0.007M and 1.30±0.04 and 1.11+0.04–0.05R, respectively. This system is a useful test of evolutionary models of young low-mass stars, as it lies in a region of parameter space where observational constraints are scarce; comparison with these models indicates an apparent age of ∼3.5-6Myr. The systemic velocity is within 1σ of the cluster value which, along with the presence of lithium absorption, strongly indicates cluster membership. The CoRoT light curve also contains large-amplitude, rapidly evolving out-of-eclipse variations, which are difficult to explain using starspots alone. The system's spectral energy distribution reveals a mid-infrared excess, which we model as thermal emission from a small amount of dust located in the inner cavity of a circumbinary disk. In turn, this opens up the possibility that some of the out-of-eclipse variability could be due to occultations of the central stars by material located at the inner edge or in the central cavity of the circumbinary disk.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - stars: pre-main sequence - binaries: spectroscopic - stars: individual: CoRoT 223992193 - open clusters and associations: individual: NGC 2264 - protoplanetary disks

Simbad objects: 23

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Number of rows : 23

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 V* AA Tau TT* 04 34 55.4222683130 +24 28 53.038273587 13.14 13.34 12.20     K5Ve 599 0
2 ASAS J052821+0338.5 EB* 05 28 20.8305520540 +03 38 32.608040911           ~ 19 0
3 V* V1642 Ori A * 05 29 20.6218092175 +00 41 27.941912748           K1V 14 0
4 V* V1174 Ori Or* 05 34 27.8535605060 -05 41 37.876152541 16.506 15.070 14.305   12.367 M0 48 0
5 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1906 1
6 V* V2212 Ori Al* 05 35 11.1412127665 -05 36 51.210193000 18.461 16.619 15.379   12.444 M2 47 0
7 2MASS J05351214-0531388 Y*O 05 35 12.1463732749 -05 31 38.821108760 19.716 18.292 17.169 15.68 13.554 M5 50 0
8 Ass Ori OB 1c As* 05 35 21 -05 20.5           ~ 127 1
9 V* V2384 Ori Al* 05 35 21.8463185314 -05 46 08.560286991       19.21 17.28 M7 86 1
10 Brun 691 *iN 05 35 26.8852040661 -04 47 30.734076005   13.3 12.29   11.08 K0-K2 19 0
11 NAME Mon I MoC 06 35 +10.1           ~ 200 0
12 NGC 2264 OpC 06 40 58 +09 53.7     3.9     ~ 1544 1
13 2MASS J06414422+0925024 TT* 06 41 44.2252915940 +09 25 02.432834591   18.21 16.81 15.74 14.50 M 27 0
14 Feige 34 HS* 10 39 36.7377085527 +43 06 09.209752646 9.613 10.91 11.14 11.319 11.464 sdOp 588 0
15 CD-35 9931 TT* 14 58 37.6885363563 -35 40 30.390196098   11.92 10.75   9.85 K2.5IV 27 0
16 NAME Upper Centaurus Lupus As* 15 24 -41.9           ~ 342 1
17 KOI-1740 Al* 19 07 19.2813795966 +42 16 45.120332899           ~ 70 1
18 Kepler-16 Al* 19 16 18.1759181246 +51 45 26.777781114   12.1   11.90   K7V 184 1
19 KOI-2937 Al* 19 37 59.2726236478 +46 41 22.952068619           ~ 99 1
20 Kepler-47 Al* 19 41 11.4984891255 +46 55 13.705101341           ~ 113 1
21 KOI-2459 Al* 19 45 44.5975310719 +44 38 29.612454271           ~ 114 1
22 Kepler-64 Al* 19 52 51.6169691968 +39 57 18.370395541           ~ 69 1
23 Ass Ori OB 1a As* ~ ~           ~ 185 0

    Equat.    Gal    SGal    Ecl

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2019.10.20-20:06:06

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