GD358: Three Decades of Observations for the In-depth Asteroseismology of a DBV Star
文献类型：期刊论文
| 作者 | Bischoff-Kim, Agnes2; Provencal, J. L.3,4; Bradley, P. A.5; Montgomery, M. H.4,6; Shipman, H. L.3,4; Harrold, Samuel T.6; Howard, B.4; Strickland, W.7,8; Chandler, D.7,8; Campbell, D.7,8 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2019-01-20 |
| 卷号 | 871期号:1页码:17 |
| 关键词 | stars: oscillations (including pulsations) stars: variables: general white dwarfs Supporting material: machine-readable tables |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aae2b1 |
| 英文摘要 | We report on the analysis of 34 years of photometric observations of the pulsating helium atmosphere white dwarf GD358. The complete data set includes archival data from 1982 to 2006, and 1195.2 hr of new observations from 2007 to 2016. From this data set, we extract 15 frequencies representing g-mode pulsation modes, adding 4 modes to the 11 modes known previously. We present evidence that these 15 modes are l = 1 modes, 13 of which belong to a consecutive sequence in radial overtone k. We perform a detailed asteroseismic analysis using models that include parameterized, complex, carbon and oxygen core composition profiles to fit the periods. Recent spectroscopic analyses place GD358 near the red edge of the DBV instability strip, at 24,000 +/- 500K and a log g of 7.8 +/- 0.08 dex. The surface gravity translates to a mass range of 0.455-0.540M(circle dot). Our best-fit model has a temperature of 23,650K and a mass of 0.5706M(circle dot). That is slightly more massive than what is suggested by the most recent spectroscopy. We find a pure helium layer mass of 10(-5.50), consistent with the result of previous studies and the outward diffusion of helium over time. |
| WOS关键词 | WHOLE EARTH TELESCOPE ; WHITE-DWARF STARS ; ZZ CETI STARS ; EVOLUTION ; HELIUM ; CONSTRAINTS ; C-12(ALPHA ; SPECTROSCOPY ; PULSATIONS ; SPECTRA |
| 资助项目 | NSF[AST-1312983] ; Hungarian NKFIH[K-115709] ; Hungarian NKFIH[PD-123910] ; TUBITAK[11BT100-192] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000456194900013 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | NSF ; NSF ; Hungarian NKFIH ; Hungarian NKFIH ; TUBITAK ; TUBITAK ; NSF ; NSF ; Hungarian NKFIH ; Hungarian NKFIH ; TUBITAK ; TUBITAK ; NSF ; NSF ; Hungarian NKFIH ; Hungarian NKFIH ; TUBITAK ; TUBITAK ; NSF ; NSF ; Hungarian NKFIH ; Hungarian NKFIH ; TUBITAK ; TUBITAK |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/24691]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Bischoff-Kim, Agnes |
| 作者单位 | 1.Acad Sci, Natl Astron Observ, Beijing 10012, Peoples R China 2.Penn State Worthington Scranton, Dunmore, PA 18512 USA 3.Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA 4.Delaware Asteroseism Res Ctr, Mt Cuba Observ, Greenville, DE 19807 USA 5.Los Alamos Natl Lab, Los Alamos, NM 87545 USA 6.Univ Texas Austin, Dept Astron, Austin, TX 78712 USA 7.Meyer Observ, 209 Paintbrush, Waco, TX 76705 USA 8.Cent Texas Astron Soc, 209 Paintbrush, Waco, TX 76705 USA 9.Korea Astron & Space Sci Inst, Daejeon 34055, South Korea 10.Fesenkov Astrophys Inst, Alma Ata 050020, Kazakhstan |
| 推荐引用方式 GB/T 7714 | Bischoff-Kim, Agnes,Provencal, J. L.,Bradley, P. A.,et al. GD358: Three Decades of Observations for the In-depth Asteroseismology of a DBV Star[J]. ASTROPHYSICAL JOURNAL,2019,871(1):17. |
| APA | Bischoff-Kim, Agnes.,Provencal, J. L..,Bradley, P. A..,Montgomery, M. H..,Shipman, H. L..,...&Erdem, A..(2019).GD358: Three Decades of Observations for the In-depth Asteroseismology of a DBV Star.ASTROPHYSICAL JOURNAL,871(1),17. |
| MLA | Bischoff-Kim, Agnes,et al."GD358: Three Decades of Observations for the In-depth Asteroseismology of a DBV Star".ASTROPHYSICAL JOURNAL 871.1(2019):17. |
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来源：国家天文台
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