Constraining the evolution of ZZ Ceti
文献类型：期刊论文
| 作者 | Mukadam, AS; Kepler, SO; Winget, DE; Nather, RE; Kilic, M; Mullally, F; von Hippel, T; Kleinman, SJ; Nitta, A; Guzik, JA |
| 刊名 | BALTIC ASTRONOMY
 |
| 出版日期 | 2003 |
| 卷号 | 12期号:1页码:71-103 |
| 关键词 | stars : white dwarfs : individual : ZZ Cet, R 548 stars : pulsations, evolution |
| 英文摘要 | We report our analysis of the stability of pulsation periods in the DAV star (pulsating hydrogen atmosphere white dwarf) ZZ Ceti, also called R 548. Based on observations that span 31 years, we conclude that the period 213.132605 s observed in ZZ Ceti drifts at a rate dP/dtless than or equal to (5.5+/-1.9) X 10(-15) s/s, after correcting for proper motion. Our results are consistent with previous (P) over dot values for this mode and an improvement over them due to the larger time-base. The characteristic stability timescale implied for the pulsation period is \P/(P) over dot\greater than or equal to1. 2 Gyr, comparable to the theoretical cooling timescale for the star. Our current stability limit for the period 213.132605 s is only slightly less than the present measurement for G 117-B15A for the period 215.2 s, another DAV, establishing this mode in ZZ Ceti as the second most stable optical clock known, more stable than atomic clocks and most pulsars. |
| 收录类别 | SCI ; ISTP |
| 语种 | 英语 |
| WOS记录号 | WOS:000184698800010 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8452]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Univ Texas, Austin, TX 78712 USA 2.McDonald Observ, Ft Davis, TX 79734 USA 3.Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil 4.Apache Point Observ, Sunspot, NM 88349 USA 5.Los Alamos Natl Lab, Los Alamos, NM 87545 USA 6.Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z4, Canada 7.Natl Astron Observ, Hilo, HI 96720 USA 8.Victoria Univ Wellington, Sch Chem & Phys Sci, Wellington, New Zealand 9.Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia 10.Perth Observ Walnut, Bickley, WA 6076, Australia |
| 推荐引用方式 GB/T 7714 | Mukadam, AS,Kepler, SO,Winget, DE,et al. Constraining the evolution of ZZ Ceti[J]. BALTIC ASTRONOMY,2003,12(1):71-103. |
| APA | Mukadam, AS.,Kepler, SO.,Winget, DE.,Nather, RE.,Kilic, M.,...&Watson, TK.(2003).Constraining the evolution of ZZ Ceti.BALTIC ASTRONOMY,12(1),71-103. |
| MLA | Mukadam, AS,et al."Constraining the evolution of ZZ Ceti".BALTIC ASTRONOMY 12.1(2003):71-103. |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。