期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 421, 期 4, 页码 2854-2860出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2966.2012.20512.x
关键词
accretion, accretion discs; black hole physics; binaries: close; stars: individual: MV Lyrae; novae, cataclysmic variables; stars: oscillations
资金
- NASA Science Mission directorate
- NWO [600.065.140.08N306]
- STFC
- European Community [ITN 215212]
- NASA [NNX11AB86G]
- STFC [ST/J001600/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J001600/1] Funding Source: researchfish
- NASA [149794, NNX11AB86G] Funding Source: Federal RePORTER
We report the discovery of a linear relationship between the root mean square (rms) variability amplitude and the mean flux in the accreting white dwarf binary system MV Lyrae. Our light curve, obtained with the Kepler satellite, spans 633 d with quasi-continuous 58.8-s cadence resolution. We show, for the first time, that how this cataclysmic variable displays linear rmsflux relations similar to those observed in many other black hole binaries, neutron star binaries and active galactic nuclei. The phenomenological similarity between the rmsflux relation observed here and in other X-ray binaries suggests a common physical origin for the broad-band variability, independent of source type, mass or size of the compact accretor. Furthermore, we infer the viscosity parameter, a, and disc scale height, H/R, using two independent methods. In both cases, both values are found to be uncomfortably high to be accommodated by the disc instability model.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据