Model Atmospheres for Hot Evolved Stars: Revising the Treatment of Continuous Opacities

Details Model Atmospheres for Hot Evolved Stars: Revising the Treatment of Continuous Opacities Model Atmospheres for Hot Evolved Stars: Revising the Treatment of Continuous Opacities

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..334..253b&link_type=abstract

14th European Workshop on White Dwarfs, ASP Conference Series, Vol. 334 Proceedings of a meeting held at Kiel, July 19-23, 2004

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The model atmosphere code Sterne, first developed in the 1970s to study hydrogen-deficient stars, has evolved considerably over the years. Most recently, attention has turned to revising the treatment of both continuous and line opacities. We have introduced continuous opacities from the Opacity Project and an opacity sampling technique is being investigated to account for contributions of up to 106 atomic lines. Changes due to the improvements in the continuous opacities are examined. The principal discovery is that additional C+ opacity around 1000 Å substantially modifies the flux distribution of hydrogen-deficient atmospheres.

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