2012MNRAS.426.1507B


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.28CET10:59:28

2012MNRAS.426.1507B - Mon. Not. R. Astron. Soc., 426, 1507-1532 (2012/October-3)

Discovery and characterization of detached M dwarf eclipsing binaries in the WFCAM Transit Survey.

BIRKBY J., NEFS B., HODGKIN S., KOVACS G., SIPOCZ B., PINFIELD D., SNELLEN I., MISLIS D., MURGAS F., LODIEU N., DE MOOIJ E., GOULDING N., CRUZ P., STOEV H., CAPPETTA M., PALLE E., BARRADO D., SAGLIA R., MARTIN E. and PAVLENKO Y.

Abstract (from CDS):

We report the discovery of 16 detached M dwarf eclipsing binaries with J < 16mag and provide a detailed characterization of three of them, using high-precision infrared light curves from the WFCAM Transit Survey (WTS). Such systems provide the most accurate and model-independent method for measuring the fundamental parameters of these poorly understood yet numerous stars, which currently lack sufficient observations to precisely calibrate stellar evolution models. We fully solve for the masses and radii of three of the systems, finding orbital periods in the range 1.5 < P < 4.9d, with masses spanning 0.35-0.50M and radii between 0.38 and 0.50R, with uncertainties of ∼ 3.5-6.4 per cent in mass and ∼ 2.7-5.5 per cent in radius. Close companions in short-period binaries are expected to be tidally locked into fast rotational velocities, resulting in high levels of magnetic activity. This is predicted to inflate their radii by inhibiting convective flow and increasing starspot coverage. The radii of the WTS systems are inflated above model predictions by ∼ 3-12 per cent, in agreement with the observed trend, despite an expected lower systematic contribution from starspot signals at infrared wavelengths. We searched for correlation between the orbital period and radius inflation by combining our results with all existing M dwarf radius measurements of comparable precision, but we found no statistically significant evidence for a decrease in radius inflation for longer period, less active systems. Radius inflation continues to exists in non-synchronized systems, indicating that the problem remains even for very low activity M dwarfs. Resolving this issue is vital not only for understanding the most populous stars in the Universe, but also for characterizing their planetary companions, which hold the best prospects for finding Earth-like planets in the traditional habitable zone.

Abstract Copyright: © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS

Journal keyword(s): surveys - binaries: eclipsing - stars: fundamental parameters - stars: late-type - stars: magnetic field - stars: rotation

VizieR on-line data: <Available at CDS (J/MNRAS/426/1507): table6.dat tablea1.dat table1.dat table2.dat table3.dat tablea2.dat>

Nomenclature: Tables 1-2+A2: WTS HHa-N-NNNNN N=3+13.

CDS comments: Table A3: SDSS 0123 is SDSS J121258.25-012310.1.

Simbad objects: 56

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Number of rows : 56

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 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11159 1
2 [R78b] 115 LP* 02 10 13.5275664707 +11 31 59.637716863   14.34 12.64 12.17 9.85 M4 9 0
3 GSC 05288-01027 SB* 02 39 08.7519179408 -10 27 46.433443403     13.20     K7 21 0
4 2MASS J03262072+0312362 EB* 03 26 20.7332406184 +03 12 36.343249114           ~ 18 0
5 LP 54-19 SB* 03 37 14.0814772871 +69 10 49.778858465   15.5   13.991   M3.8+M4.4 49 0
6 2MASS J04480963+0317480 EB* 04 48 09.6324631038 +03 17 48.087625072     15.06 15.76   ~ 18 0
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15129 1
8 V* V404 CMa Al* 06 15 55.4281243258 -18 44 51.808489266     17.45 16.81   ~ 16 0
9 V* YY Gem BY* 07 34 37.4475372002 +31 52 10.181030942 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 825 0
10 2MASS J07431157+0316220 EB* 07 43 11.5725336659 +03 16 22.102198067       16.02   ~ 16 0
11 NGC 2516 OpC 07 58 04 -60 45.2           ~ 602 0
12 V* CU Cnc Er* 08 31 37.5740891049 +19 23 39.398696822   12.83 11.809 11.592   M5Ve 203 0
13 HD 88230 Er* 10 11 22.1400209197 +49 27 15.249158750 9.23 7.94 6.61 5.36 4.56 K6VeFe-1 428 0
14 2MASS J10305521+0334265 EB* 10 30 55.2108959165 +03 34 26.721961126           ~ 18 0
15 HD 95735 Er* 11 03 20.19400 +35 58 11.5682 10.030 8.960 7.520 5.99 4.79 M2+V 636 0
16 FBS 1109+767 EB* 11 12 42.3412918233 +76 26 56.388992336   16.1   14.8   M4V 49 0
17 G 148-36 ** 12 10 10.2457546338 +33 47 24.124872655   16.9   15.6   DAZ+M 36 0
18 SDSS J121258.25-012310.1 ** 12 12 58.2524209402 -01 23 10.195304974           DA+dMe 36 0
19 V* IM Vir EB* 12 49 38.6983641947 -06 04 44.864909873   10.34 9.69   8.834 G5/6V 67 0
20 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1045 0
21 FBS 1345+796 EB* 13 45 34.8704916235 +79 23 48.292679335     13.363 13.074   M4/5 40 0
22 LP 133-373 EB* 14 04 08.8831591084 +50 20 38.639643937   16.3   15.2   ~ 19 0
23 V* GK Vir ** 14 15 36.4126864388 +01 17 18.227940327   17.0       DAe+M 96 0
24 V* GU Boo EB* 15 21 54.8242649848 +33 56 09.067728168     13.11     M0/M1.5 89 0
25 G 179-55 PM* 15 47 27.4120889015 +45 07 51.348182943   15.20 13.61 13.246   M4Ve 38 0
26 V* NN Ser No* 15 52 56.1202658103 +12 54 44.432043501     16.51     DAO1+M4 238 0
27 V* CM Dra BY* 16 34 20.3299130309 +57 09 44.365524588   14.50 12.87 10.85 9.26 M4.5V 408 0
28 G 139-21 PM* 17 15 18.9337265994 +04 57 50.064695682       14.394   M4.5V 253 1
29 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11938 0
30 Kepler-16 EB* 19 16 18.1759181246 +51 45 26.777781114   12.1   11.90   K7V 205 1
31 2MASS J19305106+3618458 EB* 19 30 51.0596886202 +36 18 45.828614651           ~ 1 0
32 2MASS J19311500+3635259 EB* 19 31 15.0082668255 +36 35 25.905886358           ~ 3 0
33 2MASS J19313458+3608376 EB* 19 31 34.5858575621 +36 08 37.639984558           ~ 2 0
34 2MASS J19324321+3636534 EB* 19 32 43.2159724128 +36 36 53.423648970           M2.3 10 0
35 2MASS J19331876+3614287 EB* 19 33 18.7559020853 +36 14 28.749395610           ~ 1 0
36 2MASS J19341550+3628271 EB* 19 34 15.5139584148 +36 28 27.164541066           M2.7 12 0
37 2MASS J19343277+3614562 EB* 19 34 32.7727457060 +36 14 56.266228294           ~ 1 0
38 2MASS J19350355+3631165 EB* 19 35 03.5531554562 +36 31 16.533398981           M 12 0
39 WTS 19c-4-11480 EB* 19 35 14.7465890902 +36 54 10.362234326           ~ 1 0
40 2MASS J19364062+3609457 EB* 19 36 40.6281050157 +36 09 45.705779027           ~ 3 0
41 2MASS J19364065+3642460 EB* 19 36 40.656 +36 42 46.04           M2.8 10 0
42 Smethells 41 LM* 19 37 08.7868773751 -51 34 00.886230752   13.84 11.56 11.348 9.891 M1Ve 23 0
43 2MASS J19371357+3648541 EB* 19 37 13.5732327496 +36 48 54.175932950           ~ 3 0
44 2MASS J19380059+3621548 EB* 19 38 00.5917534525 +36 21 54.806800501           ~ 1 0
45 2MASS J19382069+3623113 EB* 19 38 20.6872642373 +36 23 11.257177795           ~ 1 0
46 2MASS J19382904+3615442 EB* 19 38 29.0487523534 +36 15 44.469495282           ~ 1 0
47 2MASS J19383951+3616222 EB* 19 38 39.5212943748 +36 16 22.410556331           ~ 1 0
48 KOI-126 EB* 19 49 54.2016304154 +41 06 51.427612209           ~ 84 1
49 NAME Ori-Cyg Arm reg 20 00 +35.0           ~ 42 0
50 2MASS J20115132+0337194 EB* 20 11 51.3220588809 +03 37 19.424113626       16.02   ~ 16 0
51 HD 340611 WD* 20 34 21.8849808924 +25 03 49.749569866 10.687 11.471 11.546 11.648 11.728 DA2.4 287 0
52 RX J2130.6+4710 XB* 21 30 18.4670095810 +47 10 07.402855249           DA+M3.5/4Ve 31 0
53 BD+25 4655 HS* 21 59 41.9751489837 +26 25 57.398356446 8.27 9.39 9.68     sdO6 103 0
54 HD 217987 PM* 23 05 52.0354545522 -35 51 11.058757520   8.82 7.34     M2V 224 0
55 2MASS J23143816+0339493 EB* 23 14 38.1602146762 +03 39 49.365064698       16.67   ~ 21 0
56 NAME Local Group GrG ~ ~           ~ 7145 0

    Equat.    Gal    SGal    Ecl

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2021.01.28-10:59:28

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