The HgMn Binary Star Phi Herculis: Detection and Properties of the Secondary and Revision of the Elemental Abundances of the Primary

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dc.creatorZavala, R. T.
dc.creatorAdelman, S. J.
dc.creatorHummel, C. A.
dc.creatorGulliver, A. F.
dc.creatorCaliskan, H.
dc.creatorArmstrong, J. T.
dc.creatorHutter, D. J.
dc.creatorJohnston, K. J.
dc.creatorPauls, T. A.
dc.date2006-10-26
dc.date.accessioned2026-07-07T10:40:39Z
dc.date.available2026-07-07T10:40:39Z
dc.descriptionObservations of the Mercury-Manganese star Phi Herculis with the Navy Prototype Optical Interferometer (NPOI) conclusively reveal the previously unseen companion in this single-lined binary system. The NPOI data were used to predict a spectral type of A8V for the secondary star Phi Her B. This prediction was subsequently confirmed by spectroscopic observations obtained at the Dominion Astrophysical Observatory. Phi Her B is rotating at 50 +/-3 km/sec, in contrast to the 8 km/sec lines of Phi Her A. Recognizing the lines from the secondary permits one to separate them from those of the primary. The abundance analysis of Phi Her A shows an abundance pattern similar to those of other HgMn stars with Al being very underabundant and Sc, Cr, Mn, Zn, Ga, Sr, Y, Zr, Ba, Ce, and Hg being very overabundant.
dc.descriptionAccepted to ApJ, 45 pages, 11 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0610811
dc.identifierhttp://arxiv.org/abs/astro-ph/0610811
dc.identifierAstrophys.J.655:1046-1057,2007
dc.identifierdoi:10.1086/510108
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/181394
dc.subjectAstrophysics
dc.titleThe HgMn Binary Star Phi Herculis: Detection and Properties of the Secondary and Revision of the Elemental Abundances of the Primary
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