Metals in Cool DA White Dwarfs

Details Metals in Cool DA White Dwarfs Metals in Cool DA White Dwarfs

Oct 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...505l.143z&link_type=abstract

The Astrophysical Journal, Volume 505, Issue 2, pp. L143-L146.

Astronomy and Astrophysics

Astrophysics

53

Scientific paper

We used the HIRES echelle spectrograph on the Keck telescope to search for metals in the 3700-5200 Å spectra of white dwarfs with hydrogen-rich photospheres. The most popular models that account for the presence of metals are interstellar accretion and comet impact. The data are not easily reconciled with either model, but binarity might play a role. We comment on the implications for Oort-like comet clouds and certain types of planets around main-sequence stars. Based on observations at the W. M. Keck Observatory.

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