Open AccessDetection of an increasing orbital period in the subdwarf B eclipsing system NSVS 14256825
Author(s) -
Kilkenny D.,
Koen C.
Publication year - 2012
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2012.20547.x
Subject(s) - subdwarf , physics , astrophysics , orbital period , binary number , period (music) , astronomy , stars , white dwarf , acoustics , arithmetic , mathematics
ABSTRACT New timings of eclipses made in 2010 and 2011 are presented for the hot subdwarf B (sdB) eclipsing binary NSVS 14256825. Composed of an sdB star and a much cooler companion, with a period near 0.1104 days, this system is very similar to the prototype sdB eclipsing binary HW Vir. The new observations show that the binary period of NSVS 14256825 is rapidly increasing at a rate of about 12 × 10 −12 days orbit −1 .