The accretion-diffusion scenario for metals in cool white dwarfs

Details The accretion-diffusion scenario for metals in cool white dwarfs The accretion-diffusion scenario for metals in cool white dwarfs

2006-03-08

arxiv.org/abs/astro-ph/0603185v1

Astronomy and Astrophysics

Astrophysics

To be published in A&A

Scientific paper

10.1051/0004-6361:20064843

We calculated diffusion timescales for Ca, Mg, Fe in hydrogen atmosphere white dwarfs with temperatures between 5000 and 25000 K. With these timescales we determined accretion rates for a sample of 38 DAZ white dwarfs from the recent studies of Zuckerman et al. (2003) and Koester et al. (2005). Assuming that the accretion rates can be calculated with the Bondi-Hoyle formula for hydrodynamic accretion, we obtained estimates for the interstellar matter density around the accreting objects. These densities are in good agreement with new data about the warm, partially ionized phase of the ISM in the solar neighborhood.

Affiliated with

Also associated with

No associations

Rating

The accretion-diffusion scenario for metals in cool white dwarfs 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 The accretion-diffusion scenario for metals in cool white dwarfs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The accretion-diffusion scenario for metals in cool white dwarfs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-446420