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High-speed ultracam colorimetry of the subdwarf B star SDSS J171722.08+58055.8
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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, Santa Cruz de la Palma, SPAIN, JUN 06-10, 2005. Published in: BALTIC ASTRONOMY, 15 (2). pp. 275-278. ISSN 1392-0049.
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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 | ||||
| Official Date: | 2006 | ||||
| Dates: |
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| 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 |
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