SIMBAD references

2021AJ....161..155M - Astron. J., 161, 155-155 (2021/April-0)

Orbits and masses of binaries from Speckle interferometry at SOAR.

MENDEZ R.A., CLAVERIA R.M. and COSTA E.

Abstract (from CDS):

We present results from Speckle inteferometric observations of 15 visual binaries and one double-line spectroscopic binary, carried out with the HRCam Speckle camera of the SOAR 4.1 m telescope. These systems were observed as a part of an on-going survey to characterize the binary population in the solar vicinity, out to a distance of 250 pc. We obtained orbital elements and mass sums for our sample of visual binaries. The orbits were computed using a Markov Chain Monte Carlo algorithm that delivers maximum likelihood estimates of the parameters, as well as posterior probability density functions that allow us to evaluate their uncertainty. Their periods cover a range from 5 yr to more than 500 yr; and their spectral types go from early A to mid M, implying total system masses from slightly more than 4M☉ down to 0.2M☉. They are located at distances between approximately 12 and 200 pc, mostly at low Galactic latitude. For the double-line spectroscopic binary YSC8, we present the first combined astrometric/radial-velocity orbit resulting from a self-consistent fit, leading to individual component masses of 0.897 ± 0.027 M☉ and 0.857 ± 0.026 M☉; and an orbital parallax of 26.61 ± 0.29 mas, which compares very well with the Gaia DR2 trigonometric parallax (26.55 ± 0.27 mas). In combination with published photometry and trigonometric parallaxes, we place our objects on an H-R diagram and discuss their evolutionary status. We also present a thorough analysis of the precision and consistency of the photometry available for them.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Stellar masses - Visual binary stars - Speckle interferometry - Astrometry - Hertzsprung Russell diagram - Radial velocity - CCD photometry - Stellar luminosities - Sky surveys - Interferometric binary stars - Spectroscopic binary stars - Stellar evolutionary tracks

Simbad objects: 19

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2021AJ....161..155M and select 'bookmark this link' or equivalent in the popup menu