Discovery of high proper motion ancient white dwarfs: nearby massive compact halo objects?

Details Discovery of high proper motion ancient white dwarfs: nearby massive compact halo objects? Discovery of high proper motion ancient white dwarfs: nearby massive compact halo objects?

2000-02-07

arxiv.org/abs/astro-ph/0002138v2

Astronomy and Astrophysics

Astrophysics

8 pages, 2 figures, accepted for publication in ApJL; references added

Scientific paper

10.1086/312566

We present the discovery and spectroscopic identification of two very high proper motion ancient white dwarf stars, found in a systematic proper motion survey. Their kinematics and apparent magnitude clearly indicate that they are halo members, while their optical spectra are almost identical to the recently identified cool Halo white dwarf WD0346+246. Canonical stellar halo models predict a white dwarf volume density of two orders of magnitude less than the approx 7*10^{-4} Solar masses per pc^{-3} inferred from this survey. With the caveat that the sample size is very small, it appears that a significant fraction, about 10%, of the local dark matter halo is in the form of very old, cool, white dwarfs.

Affiliated with

Also associated with

No associations

Rating

Discovery of high proper motion ancient white dwarfs: nearby massive compact halo objects? 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 Discovery of high proper motion ancient white dwarfs: nearby massive compact halo objects?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discovery of high proper motion ancient white dwarfs: nearby massive compact halo objects? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-608560