SIMBAD references

2013MNRAS.430...50C - Mon. Not. R. Astron. Soc., 430, 50-59 (2013/March-3)

Discovery of five new massive pulsating white dwarf stars.

CASTANHEIRA B.G., KEPLER S.O., KLEINMAN S.J., NITTA A. and FRAGA L.

Abstract (from CDS):

Using the SOuthern Astrophysical Research telescope (SOAR) Optical Imager at the SOAR 4.1 m telescope, we report on the discovery of five new massive pulsating white dwarf stars. Our results represent an increase of about 20 per cent in the number of massive pulsators. We have detected both short and long periods, low and high amplitude pulsation modes, covering the whole range of the ZZ Ceti instability strip.

In this paper, we present a first seismological study of the new massive pulsators based on the few frequencies detected. Our analysis indicates that these stars have masses higher than average, in agreement with the spectroscopic determinations. In addition, we study for the first time the ensemble properties of the pulsating white dwarf stars with masses above 0.8 M☉. We found a bimodal distribution of the main pulsation period with the effective temperature for the massive DAVs, which indicates mode selection mechanisms.


Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): white dwarfs

CDS comments: In table 4 : WD J0855+0653 is a misprint for WD J0855+0635, WD J0940+0050 is a misprint for WD J0940+0052.

Simbad objects: 26

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