Two new EC14026 stars: PG 0048+091 and PG 0154+182

Details Two new EC14026 stars: PG 0048+091 and PG 0154+182 Two new EC14026 stars: PG 0048+091 and PG 0154+182

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004newa....9..565k&link_type=abstract

New Astronomy, Volume 9, Issue 7, p. 565-572.

Other

8

Stars: Variables: Other, Stars: Oscillations (Including Pulsations), Stars: Individual: Pg 0048+091, Stars: Individual: Pg 0154+182

Scientific paper

We present new time-resolved photometry for two sdB stars, PG 0048+091 and PG 0154+182, which clearly shows them to be rapidly pulsating stars of the ``EC14026'' class. In PG 0048+091 we detect, with some confidence, seven frequencies between 5252 and 9368 μHz corresponding to periods between 190 and 107 s. In PG 0154+182, for which our data are much sparser, we identify only a single frequency near 6090 μHz (164 s). New spectroscopy, combined with archival (2MASS) infrared photometry, indicates that PG 0048+091 has a companion of spectral type near G0V-G2V, whilst PG 0154+182 has a companion of later spectral type, probably in the range G5V-K5V.

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