Fluorine detection in hot extreme helium stars
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DOI: 10.1007/s12036-020-09659-2
Abstract: The origin and evolution of hydrogen-deficient stars are not yet adequately understood. Their chemical peculiarities, along with hydrogen-deficiency, makes them stand out from the rest and sheds light on their possible origin. Severe fluorine enrichment… read more here.
Keywords: hot extreme; detection hot; fluorine detection; extreme helium ... See more keywords
Quantitative spectroscopy of extreme helium stars Model atmospheres and a non-LTE abundance analysis of BD+10°2179
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx1541
Abstract: Extreme helium stars (EHe stars) are hydrogen-deficient supergiants of spectral type A and B. They are believed to result from mergers in double degenerate systems. In this paper, we present a detailed quantitative non-LTE spectral… read more here.
Keywords: non lte; analysis 2179; spectroscopy; extreme helium ... See more keywords
TESS photometry of extreme helium stars PV Tel and V821 Cen
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DOI: 10.1093/mnrasl/slaa075
Abstract: PV Tel variables are extreme helium (EHe) stars known to be intrinsic light and velocity variable on characteristic timescales 0.1 - 2 d. With two exceptions, they are best described as irregular. Light curves have… read more here.
Keywords: tess photometry; cen; v821 cen; extreme helium ... See more keywords