文章基本信息

标题：Hubble Space Telescope STIS Spectroscopy of Nova T Aurigae 1891
本地全文：下载
作者：Conor Larsen ; Patrick Godon ; Edward M.Sion 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2022
卷号：163
期号：6
页码：1-6
DOI：10.3847/1538-3881/ac5db7
语种：English
出版社：American Institute of Physics
摘要：T Aurigae is an eclipsing old nova that exploded in 1891. At a Gaia EDR3 distance of 815–871 pc, it is a relatively nearby old nova. Through ultraviolet spectral modeling and using the new precise Gaia distance, we find that the HST/STIS spectrum of T Aurigae is consistent with an accretion disk with a mass-transfer rate of the order of 10−8 M⊙ yr−1, for a white-dwarf mass of Mwd ≈ 0.7 ± 0.2M⊙, an inclination of i ∼ 60°, and a Gaia distance of of pc. The sharp absorption lines of metals cannot form in the disk and are likely forming in material above the disk (e.g., due stream disk overflow), in circumbinary material, and/or in material associated with the ejected shell from the 1891 nova explosion. The saturated hydrogen Lyα absorption feature is attributed to a large interstellar-medium hydrogen-column density of the order of 1021cm−2 toward T Aur, as corroborated by the value of its reddening E(B − V) = 0.42 ± 0.08.