2009A&A...505..205D


Query : 2009A&A...505..205D

2009A&A...505..205D - Astronomy and Astrophysics, volume 505, 205-215 (2009/10-1)

Mass-radius relation of low and very low-mass stars revisited with the VLTI.

DEMORY B.-O., SEGRANSAN D., FORVEILLE T., QUELOZ D., BEUZIT J.-L., DELFOSSE X., DI FOLCO E., KERVELLA P., LE BOUQUIN J.-B., PERRIER C., BENISTY M., DUVERT G., HOFMANN K.-H., LOPEZ B. and PETROV R.

Abstract (from CDS):

We measured the radii of 7 low and very low-mass stars using long baseline interferometry with the VLTI interferometer and its VINCI and AMBER near-infrared recombiners. We use these new data, together with literature measurements, to examine the luminosity-radius and mass-radius relations for K and M dwarfs. The precision of the new interferometric radii now competes with what can be obtained for double-lined eclipsing binaries. Interferometry provides access to much less active stars, as well as to stars with much better measured distances and luminosities, and therefore complements the information obtained from eclipsing systems. The radii of magnetically quiet late-K to M dwarfs match the predictions of stellar evolution models very well, providing direct confirmation that magnetic activity explains the discrepancy that was recently found for magnetically active eclipsing systems. The radii of the early K dwarfs are reproduced well for a mixing length parameter that approaches the solar value, as qualitatively expected.

Abstract Copyright:

Journal keyword(s): stars: low-mass, brown dwarfs - stars: fundamental parameters - techniques: interferometric

Simbad objects: 38

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Number of rows : 38
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* GX And Er* 00 18 22.8849799680 +44 01 22.637951588   10.120   7.3   M2V 497 0
2 * del Phe PM* 01 31 15.1047497 -49 04 21.730837   4.918 3.935     G8.5IIIb 119 0
3 HD 10780 BY* 01 47 44.8344358038 +63 51 09.011001993 6.84 6.44 5.63 4.99 4.60 K0V 329 0
4 HD 16160 PM* 02 36 04.9013368983 +06 53 12.383654295   6.81   5.2   K3V 513 1
5 * eps Eri BY* 03 32 55.8444911587 -09 27 29.739493865 5.19 4.61 3.73 3.00 2.54 K2V 1798 1
6 HD 25700 PM* 04 04 08.7075707136 -16 35 19.421005812   7.648 6.364     K2/3III/IV 21 0
7 * omi02 Eri Er* 04 15 16.3196189945 -07 39 10.330779018 5.69 5.25 4.43 3.74 3.29 K0V 774 0
8 * omi02 Eri C Er* 04 15 21.5359980886 -07 39 20.694578096   12.85 11.17     M4.5V 203 0
9 HD 27508 * 04 19 53.3385486216 -17 27 50.828796612   9.05 7.52     K5III 11 0
10 HD 33793 PM* 05 11 40.5898395497 -45 01 06.361734876 11.624 10.433 8.853 7.9 6.899 M1VIp 308 0
11 HD 36395 PM* 05 31 27.3957852161 -03 40 38.024004501 10.626 9.443 7.968 6.996 5.913 M1.5Ve 472 0
12 V* CU Cnc SB* 08 31 37.5741841080 +19 23 39.398029332   12.83 11.809 11.592   M5Ve 210 0
13 HD 88230 Er* 10 11 22.1399492383 +49 27 15.251007087 9.23 7.94 6.61 5.36 4.56 K6VeFe-1 445 0
14 HD 95735 Er* 11 03 20.1948195942 +35 58 11.576182057 10.030 8.960 7.520 5.99 4.79 M2+V 670 0
15 NAME Proxima Centauri Er* 14 29 42.9461331854 -62 40 46.164680672 14.21 12.95 11.13 9.45 7.41 M5.5Ve 1128 0
16 HD 127897 * 14 35 41.7252432336 -52 28 24.496179492   9.39 7.78     K4III 10 0
17 HD 128713 * 14 40 32.7592620048 -56 26 26.751731028   7.470 6.296     K0/1II 21 0
18 HD 130157 * 14 47 13.6496561 -21 19 29.530100   7.677 6.034     K4/5III 25 0
19 HD 130227 PM* 14 49 07.0558283736 -56 40 04.185739416 8.39 7.33 6.21 5.42 4.84 K1III 32 0
20 HD 131977 BY* 14 57 28.0007918772 -21 24 55.727265310 7.89 6.83 5.72 4.74 4.19 K4V 466 0
21 HD 136289 PM* 15 24 48.5347214472 -71 19 23.193134940   8.49 7.07     K2/3IIICNIV 12 0
22 * chi Sco * 16 13 50.9062585128 -11 50 15.892301544   6.615 5.239     K3III 64 0
23 * 36 Oph A PM* 17 15 20.7836485323 -26 36 06.117207947   5.93 5.08     K2V 258 0
24 NAME Barnard's star BY* 17 57 48.4984700685 +04 41 36.113879676 12.497 11.24 9.511 8.298 6.741 M4V 739 2
25 OGLE BW3 V38 EB* 18 04 44.2025491872 -30 09 05.497738668     18.300   16.3335 ~ 42 0
26 * sig Dra PM* 19 32 21.5902098601 +69 39 40.235805206 5.860 5.460 4.680 4.04 3.63 K0V 601 0
27 * 61 Cyg A BY* 21 06 53.9395895022 +38 44 57.902349973 7.50 6.39 5.21 4.19 3.54 K5V 991 0
28 * 61 Cyg B Er* 21 06 55.2638444466 +38 44 31.358519864 8.63 7.40 6.03 4.86 3.55 K7V 694 1
29 HD 204609 * 21 30 26.0214729240 -25 11 35.802070080   8.94 7.33     K5/M0III 11 0
30 HD 205096 * 21 34 17.1574347048 -42 55 28.847037468   7.429 6.324     K1IIICNII 12 0
31 * eps Ind PM* 22 03 21.6536261624 -56 47 09.522795714   5.75 4.69     K5V 506 0
32 HD 215627 * 22 47 09.1150740648 -41 41 30.655442832   8.13 6.84     K2III 19 0
33 HD 216149 * 22 51 02.1589579824 -39 09 24.608634876   6.851 5.400     K3III 54 0
34 V* TW PsA BY* 22 56 24.0525564918 -31 33 56.030584767   7.58 6.48     K4Ve 282 0
35 HD 217987 PM* 23 05 52.0357857091 -35 51 11.055185039   8.83 7.39     M2V 242 0
36 HD 220440 V* 23 24 13.2607743528 -51 53 28.224034944   7.308 5.731     M0III 26 0
37 HD 221370 * 23 31 51.6564729144 -41 45 08.584521732   7.79 6.57     K2III 12 0
38 HD 223428 PM* 23 49 31.6092924456 -15 51 40.588815204   7.426 6.213     K2IIIbFe-0.5 23 0

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2022.05.22-01:28:34

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