Open AccessUpper Limits on the X-Ray Emission of “Uranium” Stars
Author(s) -
E. M. Schlegel
Publication year - 2003
Publication title -
the astronomical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.61
H-Index - 271
eISSN - 1538-3881
pISSN - 0004-6256
DOI - 10.1086/367597
Subject(s) - astrophysics , uranium , physics , compact star , stars , supernova , accretion (finance) , emission spectrum , spectral line , binary number , astronomy , absorption (acoustics) , optics , nuclear physics , arithmetic , mathematics
A paper by Qian & Wasserburg suggests the optical absorption lines of uraniumobserved in the spectra of ultra-metal-poor stars (defined as [Fe/H] $<$-3)arise from contamination from a supernova in a binary star system. Assuming thebinary survived the explosion, a collapsed compact object may be present andimplying potential accretion processes with accompanying X-ray emission. Upperlimits on X-ray emission from an accreting compact object are described here.Comment: accepted AJ, scheduled Marc
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