FINDING THE INSTABILITY STRIP FOR ACCRETING PULSATING WHITE DWARFS FROM HUBBLE SPACE TELESCOPE AND OPTICAL OBSERVATIONS
FINDING THE INSTABILITY STRIP FOR ACCRETING PULSATING WHITE DWARFS FROM HUBBLE SPACE TELESCOPE AND OPTICAL OBSERVATIONS
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从哈勃太空望远镜和光学观测中寻找用于吸积脉动白矮星的不稳定带
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
W. Dillon
中科院分区：
文献类型：
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作者：
P. Szkody;A. Mukadam;B. Gänsicke;A. Henden;M. Templeton;J. Holtzman;M. Montgomery;S. Howell;A. Nitta;E. Sion;R. Schwartz;W. Dillon
时间分辨低分辨率哈勃空间望远镜紫外光谱结合地面光学测光和光谱被用来约束包含脉动白矮星(WD)的六个激变变星的温度和脉动特性。我们对过去几年爆发的五个脉动WDS的温度测定与其他六个系统的过去结果相结合，表明吸积脉动WDS的不稳定带范围从10,500 K到15,000 K，比ZZ Ceti脉动体的不稳定带更宽。对紫外光/光脉动特性的分析揭示了一些令人费解的方面。虽然与光学系统相比，一半的系统在紫外光下显示出更高的脉动幅度，但另一些系统在任何一个波长区域显示的UV/光学幅度比都不到一个脉动或没有脉动。
Time-resolved low resolution Hubble Space Telescope ultraviolet spectra together with ground-based optical photometry and spectra are used to constrain the temperatures and pulsation properties of six cataclysmic variables containing pulsating white dwarfs (WDs). Combining our temperature determinations for the five pulsating WDs that are several years past outburst with past results on six other systems shows that the instability strip for accreting pulsating WDs ranges from 10,500 to 15,000 K, a wider range than evident for ZZ Ceti pulsators. Analysis of the UV/optical pulsation properties reveals some puzzling aspects. While half the systems show high pulsation amplitudes in the UV compared to their optical counterparts, others show UV/optical amplitude ratios that are less than one or no pulsations at either wavelength region.
两个吸积白矮星脉动星的 ULTRACAM 观测
DOI：
10.1111/j.1365-2966.2008.14163.x
发表时间：
2009
影响因子：
4.8
作者：
Copperwheat C
通讯作者：
Copperwheat C