Discovery of Beryllium in White Dwarfs Polluted by Planetesimal Accretion

Autor: Klein, Beth, Doyle, Alexandra E., Zuckerman, B., Dufour, P., Blouin, Simon, Melis, Carl, Weinberger, Alycia J., Young, Edward D.
Rok vydání: 2021
Předmět:
Druh dokumentu: Working Paper
DOI: 10.3847/1538-4357/abe40b
Popis: The element beryllium is detected for the first time in white dwarf stars. This discovery in the spectra of two helium-atmosphere white dwarfs was made possible only because of the remarkable overabundance of Be relative to all other elements, heavier than He, observed in these stars. The measured Be abundances, relative to chondritic, are by far the largest ever seen in any astronomical object. We anticipate that the Be in these accreted planetary bodies was produced by spallation of one or more of O, C, and N in a region of high fluence of particles of MeV or greater energy.
Comment: 23 pages, 11 figures, 9 tables, v2: revised, accepted for publication in ApJ
Databáze: arXiv
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