Open AccessA multisite campaign on the pulsating subdwarf B star PG 1047+003
Author(s) -
Kilkenny D.,
Billères M.,
Stobie R. S.,
Fontaine G.,
Shobbrook R. R.,
O'Donoghue D.,
Brassard P.,
Sullivan D. J.,
Burleigh M. R.,
Barstow M. A.
Publication year - 2002
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 - 10.1046/j.1365-8711.2002.05198.x
Subject(s) - physics , subdwarf , astrophysics , light curve , amplitude , duty cycle , star (game theory) , stars , astronomy , optics , white dwarf , power (physics) , quantum mechanics
Results are presented from a multisite photometric campaign on the pulsating subdwarf B star, PG 1047+003. Approximately 98 h of data were obtained from three sites, with a duty cycle of ∼30 per cent. The light curve of PG 1047+003 is dominated by several frequencies in the range ∼6880–7500 μHz (periods 133–145 s) . We identify, with some confidence, 18 frequencies between 5700 and 9605 μHz (104–175 s) down to an amplitude of 0.0004 in fractional intensity (0.04 per cent), thus doubling the number of published pulsation frequencies for this star. These pulsations correspond to low‐order and low‐degree acoustic modes. Several frequency spacings near 1.05 μHz suggest a rotation period for the star of 11.0 d.