Abstract
view Abstract Citations (44) References (11) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A new pulsating white dwarf: GD 154. Robinson, E. L. ; Stover, R. J. ; Nather, R. E. ; McGraw, J. T. Abstract Additional results are reported for a survey of luminosity variations in white dwarfs. GD 154, a DA white dwarf with B-V = +0.18, is found to vary at either of two dominant periods, 1186 or 780 s. For nine nights the 1186-s period dominated and the light curve was strictly periodic, so that an ephemeris could be constructed which predicted the time of arrival of pulse peaks to + or - 30 s. On a 10th night the 780-s period dominated. The variations are probably caused by nonradial g-mode pulsations, but the extreme length of the 1186-s pulsation period strongly suggests that the white dwarf is pulsating in a very high overtone (k of approximately 10-30). The change in the period on the last night is attributed to transfer of pulsation energy from the 1186-s pulsation mode to the 780-s pulsation mode. Publication: The Astrophysical Journal Pub Date: March 1978 DOI: 10.1086/155944 Bibcode: 1978ApJ...220..614R Keywords: Astronomical Photometry; Stellar Luminosity; Variable Stars; White Dwarf Stars; Ephemerides; Light Curve; Periodic Variations; Power Spectra; Astronomy; Pulsations:White Dwarfs full text sources ADS | data products SIMBAD (18)
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
