Abstract
The authors report on first results from an ongoing program to measure and analyze proper motions for hot subdwarf and white dwarf stars, with the aim of determining to which stellar population sdB stars (in the V magnitude range 10.5 to 14.5) belong. Their sample is the largest sample of hot subdwarf proper motions measured to date. Their kinematic analysis suggests that the parent population of these hydrogen-rich sdB stars is as old or older than the old disk. The authors measure the absolute magnitude of the sdB in the field as M v = 4.5, providing independent confirmation of absolute V magnitude estimates for these stars from clusters and spectroscopic analyses. Provided it can be shown that the sdO stars evolve from the sdB, then the sdO absolute V magnitude distribution is about 1 mag brighter than for the sdB, and 1 mag wider. (16 Ref.)
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Editor information
Rights and permissions
Copyright information
© 1998 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Burkhardt, G. et al. (1998). Stars. In: Burkhardt, G., et al. Literature 1997, Part 1. Astronomy and Astrophysics Abstracts, vol 67. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-51758-7_12
Download citation
DOI: https://doi.org/10.1007/978-3-642-51758-7_12
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-51760-0
Online ISBN: 978-3-642-51758-7
eBook Packages: Springer Book Archive