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venerdì 11 dicembre 2015

# rmx-s-astrophys: a blue straggler star

<< Birth of a blue straggler star. (..) A normal star in a binary system pulls in matter from an aging companion star that has swelled to a bloated red giant. (..) After a couple hundred million years, the red giant star has burned out and collapsed to the white dwarf that shines intensely in ultraviolet wavelengths. The companion star has become much hotter, brighter and bluer >>

http://news.wisc.edu/24229

Natalie M. Gosnell, Robert D. Mathieu, et al.  Implications for the formation of blue straggler stars from HST ultraviolet observations of NGC 188. The Astrophysical Journal, 2015; 814 (2): 163 DOI: 10.1088/0004-637X/814/2/163

http://m.iopscience.iop.org/article/10.1088/0004-637X/814/2/163/meta;jsessionid=8F0AA9F8377E8DC24A3ADA3C36A0B028.c2.iopscience.cld.iop.org

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