The pulsations of PG 1351+489

	The pulsations of PG 1351+489
	Redaelli, M.1; Kepler, S. O.1; Costa, J. E. S.1; Winget, D. E.2,3; Handler, G.4; Castanheira, B. G.1,2,3,4; Kanaan, A.5; Fraga, L.6; Henrique, P.5; Giovannini, O.7
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2011-08-01
卷号	415 期号:2 页码:1220-1227
关键词	stars: evolution stars: individual: PG 1351+489 stars: oscillations white dwarfs
英文摘要	PG 1351+489 is one of the 20 DBVs - pulsating helium-atmosphere white dwarf stars - known and has the simplest power spectrum for this class of star, making it a good candidate to study cooling rates. We report accurate period determinations for the main peak at 489.334 48 s and two other normal modes using data from the Whole Earth Telescope (WET) observations of 1995 and 2009. In 2009, we detected a new pulsation mode and the main pulsation mode exhibited substantial change in its amplitude compared to all previous observations. We were able to estimate the star's rotation period, of 8.9 h, and discuss a possible determination of the rate of period change of (2.0 +/- 0.9) x 10(-13) s s(-1), the first such estimate for a DBV.
收录类别	SCI
语种	英语
WOS记录号	WOS:000293756300018
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/8380]
专题	国家天文台_光学天文研究部
作者单位	1.Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil 2.Univ Texas Austin, Dept Astron, Austin, TX 78712 USA 3.Univ Texas Austin, McDonald Observ, Austin, TX 78712 USA 4.Univ Vienna, Inst Astron, A-1180 Vienna, Austria 5.Univ Fed Santa Catarina, Dept Fis, BR-88040900 Florianopolis, SC, Brazil 6.So Observ Astrophys Res, La Serena, Chile 7.Univ Caxias Sul, Dept Quim & Fis, BR-95070560 Caxias Do Sul, RS, Brazil 8.Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA 9.Mt Cuba Observ, Delaware Asteroseism Res Ctr, Greenville, DE 19807 USA 10.NASA, SETI Inst, Ames Res Ctr, Moffett Field, CA 94035 USA
推荐引用方式 GB/T 7714	Redaelli, M.,Kepler, S. O.,Costa, J. E. S.,et al. The pulsations of PG 1351+489[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,415(2):1220-1227.
APA	Redaelli, M..,Kepler, S. O..,Costa, J. E. S..,Winget, D. E..,Handler, G..,...&Clemens, J. C..(2011).The pulsations of PG 1351+489.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,415(2),1220-1227.
MLA	Redaelli, M.,et al."The pulsations of PG 1351+489".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 415.2(2011):1220-1227.