High precision with the Whole Earth Telescope: Lessons and some results from XCoV20 for the roAp star HR 1217
文献类型：期刊论文
| 作者 | Kurtz, DW; Kawaler, SD; Riddle, RL; Reed, MD; Cunha, MS; Wood, M; Silvestri, N; Watson, TK; Dolez, N; Moskalik, P |
| 刊名 | BALTIC ASTRONOMY
 |
| 出版日期 | 2003 |
| 卷号 | 12期号:1页码:105-117 |
| 关键词 | stars : roAp stars stars : individual : HR 1217 |
| 英文摘要 | HR 1217 is a prototypical rapidly oscillating Ap star that has presented a test to the theory of nonradial stellar pulsation. Prior observations showed a clear pattern of five modes with alternating frequency spacings of 33.3 muHz and 34.6 muHz, with a sixth mode at a problematic spacing of 50.0 muHz (which equals 1.5 X 33.3 muHz) to the high-frequency side. Asymptotic pulsation theory allowed for a frequency spacing of 34 muHz, but HIPPARCOS observations rule out such a spacing. Theoretical calculations of magnetoacoustic modes in Ap stars by Cunha (2001) predicted that there should be a previously undetected mode 34 muHz higher than the main group, with a smaller spacing between it and the highest one. The 20th extended coverage campaign of the Whole Earth Telescope (XCov20) has discovered this frequency as predicted by Cunha (2001). Amplitude modulation of several of the pulsation modes between the 1986 and 2000 data sets has also been discovered, while important parameters for modelling the geometry of the pulsation modes have been shown to be unchanged. With stringent selection of the best data from the WET network the amplitude spectrum shows highest peaks at only 50 mumag and formal errors on the determined amplitudes are 14 mumag. Some lessons for future use of WET for the highest precision photometry on bright stars are discussed. |
| 收录类别 | ISTP ; SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000184698800011 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8439]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Univ Cent Lancashire, Ctr Astrophys, Preston PR1 2HE, Lancs, England 2.Observ Midi Pyrenees, CNRS, UMR5572, F-31400 Toulouse, France 3.Univ Cape Town, Dept Astron, ZA-7701 Rondebosch, South Africa 4.Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA 5.Univ Porto, Ctr Astrofis, P-4150762 Oporto, Portugal 6.Inst Super Maia, P-4470 Castela Da Maia, Portugal 7.Florida Inst Technol, Dept Phys & Space Sci, Melbourne, FL USA 8.Florida Inst Technol, SARA Observ, Melbourne, FL USA 9.Georgetown Univ SW, Georgetown, TX USA 10.Nicholas Copernicus Astron Ctr, PL-00716 Warsaw, Poland |
| 推荐引用方式 GB/T 7714 | Kurtz, DW,Kawaler, SD,Riddle, RL,et al. High precision with the Whole Earth Telescope: Lessons and some results from XCoV20 for the roAp star HR 1217[J]. BALTIC ASTRONOMY,2003,12(1):105-117. |
| APA | Kurtz, DW.,Kawaler, SD.,Riddle, RL.,Reed, MD.,Cunha, MS.,...&Kleinman, SJ.(2003).High precision with the Whole Earth Telescope: Lessons and some results from XCoV20 for the roAp star HR 1217.BALTIC ASTRONOMY,12(1),105-117. |
| MLA | Kurtz, DW,et al."High precision with the Whole Earth Telescope: Lessons and some results from XCoV20 for the roAp star HR 1217".BALTIC ASTRONOMY 12.1(2003):105-117. |
入库方式： OAI收割
来源：国家天文台
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