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dc.contributor.authorZhao, Jingkun
dc.contributor.authorOswalt, T. D.
dc.contributor.authorWillson, Lee Anne
dc.contributor.authorWang, Qian
dc.contributor.authorZhao, Gang
dc.date.accessioned2017-01-24T19:23:09Z
dc.date.available2017-01-24T19:23:09Z
dc.date.issued2012-02-20
dc.identifier.citationZhao, J. K., Oswalt, T. D., Willson, L. A., Wang, Q., & Zhao, G. (2012). The initial-final mass relation among white dwarfs in wide binaries. Astrophysical Journal, 746(2) doi:10.1088/0004-637X/746/2/144en_US
dc.identifier.urihttp://hdl.handle.net/11141/1152
dc.description.abstractWe present the initial–final mass relation derived from 10 white dwarfs in wide binaries that consist of a main-sequence star and a white dwarf. The temperature and gravity of each white dwarf were measured by fitting theoretical model atmospheres to the observed spectrum using a χ2 fitting algorithm. The cooling time and mass were obtained using theoretical cooling tracks. The total age of each binary was estimated from the chromospheric activity of its main-sequence component to an uncertainty of about 0.17 dex in log t. The difference between the total age and white dwarf cooling time is taken as the main-sequence lifetime of each white dwarf. The initial mass of each white dwarf was then determined using stellar evolution tracks with a corresponding metallicity derived from spectra of their main-sequence companions, thus yielding the initial–final mass relation. Most of the initial masses of the white dwarf components are between 1 and 2 Mʘ. Our results suggest a correlation between the metallicity of a white dwarf’s progenitor and the amount of post-main-sequence mass loss it experiences—at least among progenitors with masses in the range of 1–2 Mʘ. A comparison of our observations to theoretical models suggests that low-mass stars preferentially lose mass on the red giant branch.en_US
dc.language.isoen_USen_US
dc.rightsThis published article is made available in accordance with the publisher’s policy. It may be subject to U.S. copyright law.en_US
dc.rights.urihttps://aas.org/publications/aas-copyright-policyen_US
dc.titleThe initial-final mass relation among white dwarfs in wide binariesen_US
dc.typeArticleen_US
dc.identifier.doi10.1088/0004-637X/746/2/144


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