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KOI-3278: A self-lensing binary star system

by Ivan Adamin in March-April 2014 (#5)

More than 40% of stars are in pairs that orbit around each other, called binary star systems. KOI-3278 is a pair of stars consisting of a white dwarf and a main sequence G-star with an orbital period of 88.18 days. This system produces the first ever case of periodic microlensing signal, based on data collected by NASA's Kepler planet-hunting space observatory. Previously theorized, around forty years ago, this phenomenon has never actually been observed directly until now.
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March-April 2014

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In this issue:
KOI-3278: A self-lensing binary star system by Ivan Adamin

BL Bootis stars - anomalous Cepheids by Ivan Adamin

A revision of NSV 13538 = NSVS 17231162 by Alexandr Ditkovsky

NSVS 11075037 = Dauban V53:
updated elements of a Mira variable in Hercules
by Siarhey Hadon

Pulsating variable stars and the Hertzsprung-Russell diagram
by Siarhey Hadon, Ivan Adamin

RS Puppis: the light echoes calibrate standard candles for accurate distance measurements
by Ivan Adamin

SS Lacertae: The non-eclipsing eclipsing binary by Ivan Adamin

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