Open AccessRadial velocity study of the pulsating subdwarf B star and possible Type Ia supernova progenitor KPD 1930+2752
Author(s) -
Woolf Vincent M.,
Jeffery C. Simon,
Pollacco Donald L.
Publication year - 2002
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2002.05264.x
Subject(s) - physics , zeeman effect , white dwarf , helium , astrophysics , magnetic field , spectral line , dipole , field (mathematics) , atomic physics , astronomy , stars , quantum mechanics , mathematics , pure mathematics
We report the results of a high‐time‐resolution radial velocity study of the subdwarf B star and possible Type Ia supernova progenitor KPD 1930+2752. There were no significant peaks in the power spectrum of the velocity curve above our detection limit, about 4 km s −1 , at the frequencies where peaks arising from pulsation were present in the photometric data of previous researchers. We report an orbital velocity amplitude, 348.5±1 km s ‐1 , in agreement with that reported by previous investigators. We find an orbital period of P =0.095 093 08±0.000 000 15 d based on our data and the ephemeris of Maxted et al.