White dwarfs with metallic line spectra

Details White dwarfs with metallic line spectra White dwarfs with metallic line spectra

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...175..173l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 175, no. 1-2, March 1987, p. 173-178.

Astronomy and Astrophysics

Astrophysics

18

Metallicity, Spectrum Analysis, Stellar Mass Accretion, Stellar Spectra, White Dwarf Stars, Abundance, Line Spectra, Stellar Spectrophotometry, Stellar Temperature

Scientific paper

Four new white dwarfs showing metallic absorption features are analyzed using optical spectrophotometry, and compared with the previously known stars Ross 640 and vMa 2. The temperatures range from ≡12,000K for PG 2322+119 to 6000K for G 157-35. PG 1225-079 has a detected hydrogen and other abundances quite similar to Ross 640, and is some 900K hotter. GD 95 is a similar object at 8000K. The results suggest first of all that traces of hydrogen are prevalent among DZ stars with Teff < 12,000K and that an empirical lower temperature boundary at Teff = 11,000±1000K exists for the mechanism which inhibits the accretion of hydrogen. Secondly, there appear to be large variations in the Mg/Ca ratio, from star to star.

Affiliated with

Also associated with

No associations

Rating

White dwarfs with metallic line spectra 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 White dwarfs with metallic line spectra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and White dwarfs with metallic line spectra will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1451542