A First Look at White Dwarf - M Dwarf Pairs in the Sloan Digital Sky Survey (SDSS)

Details A First Look at White Dwarf - M Dwarf Pairs in the Sloan Digital Sky Survey (SDSS) A First Look at White Dwarf - M Dwarf Pairs in the Sloan Digital Sky Survey (SDSS)

2003-02-19

arxiv.org/abs/astro-ph/0302405v1

Astron.J. 125 (2003) 2621

Astronomy and Astrophysics

Astrophysics

23 pages with 10 figures. Accepted by AJ, to appear in May 2003 issue

Scientific paper

10.1086/374762

We have identified 109 White Dwarf (WD) - M dwarf pairs in the Sloan Digital Sky Survey (SDSS) with g < 20th magnitude. For each system we determined the temperature of the WD primary and the spectral type of the M dwarf secondary. Using H-alpha emission as a proxy for the chromospheric activity level of the M dwarf, we investigated correlations between the activity level and properties of the system. Compared with field M dwarfs (Hawley et al. 1996), we see a slightly higher active fraction of early-type stars, with activity levels similar to the field. We have conducted followup observations at the ARC 3.5m telescope to obtain radial velocity information and to search for short period binaries, which may be on the verge of interacting. We report on one system with a 4.1 hour period, and several additional systems with significant velocity variations.

Affiliated with

Also associated with

No associations

Rating

A First Look at White Dwarf - M Dwarf Pairs in the Sloan Digital Sky Survey (SDSS) 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 A First Look at White Dwarf - M Dwarf Pairs in the Sloan Digital Sky Survey (SDSS), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A First Look at White Dwarf - M Dwarf Pairs in the Sloan Digital Sky Survey (SDSS) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-723628