SDSS J121606.5+280648.5: a helium-core white dwarf in an eclipsing binary system?

Details SDSS J121606.5+280648.5: a helium-core white dwarf in an eclipsing binary system? SDSS J121606.5+280648.5: a helium-core white dwarf in an eclipsing binary system?

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ap%26ss.329..273h&link_type=abstract

Astrophysics and Space Science, Volume 329, Issue 1-2, pp. 273-276

Astronomy and Astrophysics

Astrophysics

Stars: Binaries, Stars: White Dwarfs, Stars: Individual: Sdss J121606.5+280648.5

Scientific paper

A comparison of Palomar Observatory Sky Survey (POSS) and Sloan Digital Sky Survey (SDSS) images showed SDSS J121606.5+280648.5 to have increased in brightness by nearly two magnitudes since 1955. SDSS J121606.5+280648.5 turned out to be a low-mass white dwarf having a less luminous cool companion, probably a late-type Main Sequence dwarf. A possible explanation of brightening is that the companion eclipsed the white dwarf at the time the POSS plate was obtained. If SDSS J121606.5+280648.5 is an eclipsing binary, further study should help establish circumstances in which rapid mass loss occurs on the Red Giant Branch (RGB).

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