Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-02-10
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
Accepted for publication in ApJ, 14 pages, 12 figures
Scientific paper
We measure apparent velocities (v_app) of the Halpha and Hbeta Balmer line cores for 449 non-binary thin disk normal DA white dwarfs (WDs) using optical spectra taken for the ESO SN Ia Progenitor surveY (SPY; Napiwotzki et al. 2001). Assuming these WDs are nearby and co-moving, we correct our velocities to the Local Standard of Rest so that the remaining stellar motions are random. By averaging over the sample, we are left with the mean gravitational redshift,
Falcon Ross E.
Montgomery Michael H.
Williams Kurtis A.
Winget Don E.
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