2003A&A...397L...5S


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.20CEST21:38:42

2003A&A...397L...5S - Astronomy and Astrophysics, volume 397, L5-8 (2003/1-3)

First radius measurements of very low mass stars with the VLTI.

SEGRANSAN D., KERVELLA P., FORVEILLE T. and QUELOZ D.

Abstract (from CDS):

We present 4 very low mass stars radii measured with the VLTI using the 2.2µm VINCI test instrument. The observations were carried out during the commissioning of the 104-meter-baseline with two 8-meter-telescopes. We measure angular diameters of 0.7-1.5mas with accuracies of 0.04-0.11mas, and for spectral type ranging from M0V to M5.5V. We determine an empirical mass-radius relation for M dwarfs based on all available radius measurements. The observed relation agrees well with theoretical models at the present accuracy level, with possible discrepancy around 0.5-0.8M that needs to be confirmed. In the near future, dozens of M dwarfs radii will be measured with 0.1-1% accuracy, with the VLTI, thanks to the improvements expected from the near infrared instrument AMBER. This will bring strong observational constraints on both atmosphere and interior physics.

Abstract Copyright:

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

Simbad objects: 17

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Number of rows : 17

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 V* GX And Er* 00 18 22.8849667932 +44 01 22.637271919   10.120   7.3   M2V 469 0
2 HD 16160 PM* 02 36 04.9023844802 +06 53 12.431588708   6.81   5.2   K3V 496 1
3 * 39 Eri PM* 04 14 23.6883920999 -10 15 22.617787948 7.18 6.07 4.90 4.01 3.44 K2III 103 0
4 HD 27130 EB* 04 17 38.9458416476 +16 56 52.210019080   9.075 8.315 8.79   G8V 234 0
5 HD 33793 Ro* 05 11 40.5893175460 -45 01 06.353955874 11.624 10.433 8.853 7.9 6.899 M1VIp 293 0
6 * 31 Ori V* 05 29 43.9814689897 -01 05 32.058230061   6.28 4.71     K4III 88 0
7 HD 36395 PM* 05 31 27.3958475290 -03 40 38.021551815 10.626 9.443 7.968 6.996 5.913 M1.5Ve 444 0
8 * gam02 Vol PM* 07 08 44.8636348625 -70 29 56.123442258   4.774 3.746     K0III 65 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-2 827 0
10 HD 88230 Er* 10 11 22.1400209197 +49 27 15.249158750 9.23 7.94 6.61 5.36 4.56 K6VeFe-1 432 0
11 HD 95735 Er* 11 03 20.19400 +35 58 11.5682 10.030 8.960 7.520 5.99 4.79 M2+V 644 0
12 * w Cen PM* 12 42 35.4514345 -48 48 47.189811 6.77 5.76 4.66 3.91 3.34 K0III 66 0
13 NAME Proxima Centauri Er* 14 29 42.9451234609 -62 40 46.170818907 14.21 12.95 11.13 9.45 7.41 M5.5Ve 1029 0
14 NAME Barnard's star BY* 17 57 48.4997994034 +04 41 36.111354228 12.497 11.24 9.511 8.298 6.741 M4V 687 2
15 HD 216149 * 22 51 02.1592317599 -39 09 24.607417936   6.851 5.400     K3III 53 0
16 * alf PsA ** 22 57 39.04625 -29 37 20.0533 1.31 1.25 1.16 1.11 1.09 A4V 1139 3
17 HD 217987 PM* 23 05 52.0354545522 -35 51 11.058757520   8.82 7.34     M2V 227 0

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2021.04.20-21:38:42

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