A Gravitational Redshift Determination of the Mean Mass of DBA White Dwarfs

Details A Gravitational Redshift Determination of the Mean Mass of DBA White Dwarfs A Gravitational Redshift Determination of the Mean Mass of DBA White Dwarfs

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1273...13f&link_type=abstract

17TH EUROPEAN WHITE DWARF WORKSHOP. AIP Conference Proceedings, Volume 1273, pp. 13-18 (2010).

Astronomy and Astrophysics

Astronomy

Redshift, White Dwarfs, Astronomical Observatories, Monte Carlo Methods, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae, Observatories And Site Testing, Quantum Monte Carlo Methods

Scientific paper

We measure apparent velocities (νapp) of the Hα and Hβ Balmer line cores for 16 helium-dominated white dwarfs (WDs) using optical spectra taken for the European Southern Observatory SN Ia progenitor survey (SPY). Following the gravitational redshift method employed by Falcon et al. [1], we find a mean apparent velocity of <νapp> = 39.58+/-4.41 km s-1 and use it to derive a mean mass of = 0.701-0.046+0.042Msolar. Though the sample is small, the mean mass appears to be larger than the mean mass of DAs derived using the same method [0.647-0.014+0.013Msolar,1].

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