2006ApJ...644..475B

Query : 2006ApJ...644..475B

2006ApJ...644..475B - Astrophys. J., 644, 475-483 (2006/June-2)

First results from the CHARA array. IV. The interferometric radii of low-mass stars.

BERGER D.H., GIES D.R., McALISTER H.A., TEN BRUMMELAAR T.A., HENRY T.J., STURMANN J., STURMANN L., TURNER N.H., RIDGWAY S.T., AUFDENBERG J.P. and MERAND A.

Abstract (from CDS):

We have measured the angular diameters of six M dwarfs with the CHARA Array, a long-baseline optical interferometer located at Mount Wilson Observatory. Spectral types range from M1.0 V to M3.0 V and linear radii from 0.38 to 0.69 R☉. These results are consistent with the seven other M dwarf radii measurements from optical interferometry and with those for 14 stars in eclipsing binary systems. We compare all directly measured M dwarf radii to model predictions and find that current models underestimate the true stellar radii by up to 15%-20%. The differences are small among the metal-poor stars but become significantly larger with increasing metallicity. This suggests that theoretical models for low-mass stars may be missing some opacity source that alters the computed stellar radii.

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Journal keyword(s): Infrared: Stars - Instrumentation: High Angular Resolution - Instrumentation: Interferometers - stars: individual (GJ 15A) - stars: individual (GJ 514) - stars: individual (GJ 526) - stars: individual (GJ 687) - stars: individual (GJ 752A) - stars: individual (GJ 880) - Stars: Late-Type

Simbad objects: 25

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Number of rows : 25
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 1326 PM* 00 18 22.8849799680 +44 01 22.637951588   9.61 8.14 7.3   M2V 602 0
2 HD 2952 PM* 00 33 10.3944926208 +54 53 41.949623868   6.959 5.922     K0III 70 1
3 HD 27130 SB* 04 17 38.9458465152 +16 56 52.187419068   9.075 8.315 8.79   G3 274 0
4 HD 33793 PM* 05 11 40.5898395497 -45 01 06.361734876 11.624 10.433 8.853 7.9 6.899 M1VIp 367 0
5 HD 36395 PM* 05 31 27.3957852161 -03 40 38.024004501 10.626 9.443 7.968 6.996 5.913 M1.5Ve 574 0
6 V* YY Gem SB* 07 34 37.4474327544 +31 52 10.179641496 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 882 0
7 V* CU Cnc SB* 08 31 37.5741841080 +19 23 39.398029332   12.83 11.809 11.592   M5Ve 237 0
8 HD 95735 PM* 11 03 20.1948195942 +35 58 11.576182057 10.030 8.960 7.520 5.99 4.79 M2+V 795 0
9 BD+11 2576 PM* 13 29 59.7858994351 +10 22 37.784532575 11.728 10.524 9.029 8.07 7.013 M1.0V 313 0
10 HD 119550 PM* 13 43 35.6994238125 +14 21 56.183577981   7.57   6.5   G2V 78 0
11 HD 119850 PM* 13 45 43.7755597223 +14 53 29.471707437 10.989 9.894 8.50 7.465 6.363 M2V 402 0
12 NAME Proxima Centauri PM* 14 29 42.9461331854 -62 40 46.164680672 14.21 12.95 11.13 9.45 7.41 M5.5Ve 1483 0
13 V* GU Boo EB* 15 21 54.8243257728 +33 56 09.067285032     13.11     M0/M1.5 99 0
14 V* CM Dra BY* 16 34 20.3302660573 +57 09 44.368918696   14.50 12.87 10.85 9.26 M4.5V 467 0
15 HD 151541 PM* 16 42 38.5765856163 +68 06 07.791412449   8.32   7.1   K1 148 0
16 NAME TrES-Her0-07621 EB* 16 50 20.7262037184 +46 39 01.369643976     15.51     ~ 24 0
17 BD+68 946 PM* 17 36 25.8993094605 +68 20 20.909627174 11.73 10.65   8.3   M3.0V 345 0
18 NAME Barnard's star BY* 17 57 48.4984700685 +04 41 36.113879676 12.497 11.24 9.511 8.298 6.741 M4V 907 2
19 OGLE BW3 V38 EB* 18 04 44.2025491872 -30 09 05.497738668     18.300   16.3335 ~ 43 0
20 HD 180617 PM* 19 16 55.2565688720 +05 10 08.040554168 11.768 10.63 9.115 8.076 6.782 M3-V 475 0
21 HD 182101 PM* 19 22 48.3509531208 +09 54 47.340798372   6.789 6.346     F6V 127 0
22 RX J2130.6+4710 XB* 21 30 18.4670033976 +47 10 07.403693592           DA+M3.5/4Ve 32 0
23 HD 216899 PM* 22 56 34.8046530863 +16 33 12.355636588 11.323 10.143 8.638 7.657 6.542 M1.5V 335 0
24 HD 217987 PM* 23 05 52.0357857091 -35 51 11.055185039   8.83 7.39     M2V 320 0
25 HD 218261 PM* 23 06 31.8853045584 +19 54 39.072222792   6.79   6.1   F6V 112 0

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