086252
收藏DataCite Commons2023-04-21 更新2025-04-15 收录
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http://esdcdoi.esac.esa.int/doi/html/data/astronomy/xmm-newton/086252.html
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Our X-ray surveys of UV-emitting AGB stars show that 40% of objects with FUV emission and FUV-NUV flux ratios >virgul0.2 have variable X-ray emission characterized by very high temperatures openParTx virgul 35-160 MKclosePar and luminosities openParLx virgul 0.002-0.2 LsunclosePar comma indicating the presence of accretion associated with a close binary companion. However comma the UV-emitting AGB star population is dominated by objects with little or no FUV emission comma and we do not know whether the UV emission from these is intrinsic to the AGB star or extrinsic openPari.e. comma due to binarityclosePar. We propose a small X-ray survey of NUV-bright AGB stars with low openPar<0.1closePar FUV-NUV flux ratios to help distinguish between intrinsic and extrinsic models of the puzzling high-energy emission of cool AGB stars.
提供机构：
European Space Agency
创建时间：
2023-04-21
