1999A&A...351..619F


Query : 1999A&A...351..619F

1999A&A...351..619F - Astronomy and Astrophysics, volume 351, 619-626 (1999/11-2)

Accurate masses of very low mass stars. I. Gl 570BC (0.6M+0.4M).

FORVEILLE T., BEUZIT J.-L., DELFOSSE X., SEGRANSAN D., BECK F., MAYOR M., PERRIER C., TOKOVININ A. and UDRY S.

Abstract (from CDS):

We present very accurate individual masses (1.2% relative accuracy) for the two components of Gl 570BC, an interferometric and double-lined spectroscopic binary system. They were obtained from new high accuracy radial velocity and angular separation measurements, analysed together with previously published measurements. From those data we determine a much improved orbit through a simultaneous least square fit to the radial velocity, visual, and parallax information. The derived masses and absolute magnitudes generally validate the theoretical and empirical mass-luminosity relations around 0.5M, but point towards some low level discrepancies at the 0.1 to 0.15 magnitude level. Forthcoming results of this observing program will extend the comparison to much lower masses with similar accuracy.

Abstract Copyright:

Journal keyword(s): stars: binaries: general - stars: binaries: spectroscopic - stars: binaries: visual - stars: low-mass, brown dwarfs

Simbad objects: 5

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Number of rows : 5
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* YY Gem BY* 07 34 37.4474327544 +31 52 10.179641496 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 840 0
2 V* CU Cnc SB* 08 31 37.5741841080 +19 23 39.398029332   12.83 11.809 11.592   M5Ve 210 0
3 HD 131976 SB* 14 57 26.53330 -21 24 41.5778 10.759 9.559 8.065 7.075 9.02 M1.5V 234 1
4 HD 131977 BY* 14 57 28.0007918772 -21 24 55.727265310 7.89 6.83 5.72 4.74 4.19 K4V 466 0
5 V* CM Dra BY* 16 34 20.3302660573 +57 09 44.368918696   14.50 12.87 10.85 9.26 M4.5V 425 0

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2022.05.24-09:04:57

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