UNSPECIFIED (2006) High-speed ultracam colorimetry of the subdwarf B star SDSS J171722.08+58055.8. In: 2nd Meeting on Hot Subdwarf Stars and Related Objects, JUN 06-10, 2005, Santa Cruz de la Palma, SPAIN.

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Abstract

We present high-speed multicolour photometry of the faint subdwarf B star SDSS J171722.08+58055.8 (m(B) = 16.7mag), which was recently discovered to be pulsating. The data were obtained during two consecutive nights in 2004 August using the three-channel photometer ULTRACAM attached to the 4.2 m William Herschel Telescope. We confirm the star to be oscillating and we refine the dominant frequency to 6.960 mHz. A second new frequency of 7.267 mHz was discovered. Both frequencies are significant in all three colors at level > 5 sigma and vary in phase in the three colors. We attempted mode identification for the strongest mode from its amplitude ratios but did not succeed.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	Q Science > QB Astronomy
Journal or Publication Title:	BALTIC ASTRONOMY
Publisher:	INST THEORETICAL PHYSICS ASTRONOMY
ISSN:	1392-0049
Date:	2006
Volume:	15
Number:	2
Number of Pages:	4
Page Range:	pp. 275-278
Publication Status:	Published
Title of Event:	2nd Meeting on Hot Subdwarf Stars and Related Objects
Location of Event:	Santa Cruz de la Palma, SPAIN
Date(s) of Event:	JUN 06-10, 2005
URI:	http://wrap.warwick.ac.uk/id/eprint/33639

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