SIMBAD references

2002AJ....124.2853K - Astron. J., 124, 2853-2867 (2002/November-0)

Optical observations and orbital parameters of the close DA plus dMe binaries BPM 71214, EUVE J0720-31.7, BPM 6502, and EC 13471-1258.


Abstract (from CDS):

We have obtained photometric and spectroscopic observations of the close DA plus dMe binaries BPM 6502 and EC 13471-1258, and spectroscopic observations of the close binaries BPM 71214 and EUVE J0720-31.7. We have updated the ephemerides of BPM 6502 and EUVE J0720-31.7 with the spectroscopic measurements and obtained periods of 0.20162 and 0.15074 days for BPM 71214 and EC 13471-1258, respectively, by measuring the shift in Hα emission. Photometric variations in R and I due to reprocessing of incoming radiation from the hot white dwarf were observed in BPM 6502. We have also observed eclipses and ellipsoidal variations in B and R for EC 13471-1258, suggesting that the secondary is nearly filling its Roche lobe.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Close - stars: individual (BPM 71214) - stars: individual (EUVE J0720-31.7) - Stars: Individual: Alphanumeric: BPM 6502 - stars: individual (EC 13471-1258) - Stars: White Dwarfs

Simbad objects: 10

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