Dynamical parallax of sigma Ori AB: mass, distance and age

Details Dynamical parallax of sigma Ori AB: mass, distance and age Dynamical parallax of sigma Ori AB: mass, distance and age

2007-10-18

arxiv.org/abs/0710.3541v1

Astronomy and Astrophysics

Astrophysics

MNRAS, accepted

Scientific paper

10.1111/j.1365-2966.2007.12614.x

The massive OB-type binary sigma Ori AB is in the centre of the very young sigma Orionis cluster. I have computed the most probable distances and masses of the binary for several ages using a dynamical parallax-like method. It incorporates the BVRIH-band apparent magnitudes of both components, precise orbital parameters, interstellar extinction and a widely used grid of stellar models from the literature, the Kepler's third law and a chi^2 minimisation. The derived distance is 334^(+25)_(-22) pc for an age of 3+/-2 Ma; larger ages and distances are unlikely. The masses of the primary and the secondary lie on the approximate intervals 16-20 and 10-12 Msol, respectively. I also discuss the possibility of sigma Ori AB being a triple system at ~385 pc. These results will help to constrain the properties of young stars and substellar objects in the sigma Orionis cluster.

Affiliated with

Also associated with

No associations

Rating

Dynamical parallax of sigma Ori AB: mass, distance and age does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dynamical parallax of sigma Ori AB: mass, distance and age, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical parallax of sigma Ori AB: mass, distance and age will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-461440