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HR 710 (HD 15144): an ultra-Sr-rich, magnetic Ap star with a close companion ★
dc.contributor.authorCowley, C. R.en_US
dc.contributor.authorHubrig, S.en_US
dc.date.accessioned2010-06-01T20:44:01Z
dc.date.available2010-06-01T20:44:01Z
dc.date.issued2008-03-11en_US
dc.identifier.citationCowley, C. R.; Hubrig, S. (2008). "HR 710 (HD 15144): an ultra-Sr-rich, magnetic Ap star with a close companion ★ ." Monthly Notices of the Royal Astronomical Society 384(4): 1588-1596. <http://hdl.handle.net/2027.42/73836>en_US
dc.identifier.issn0035-8711en_US
dc.identifier.issn1365-2966en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/73836
dc.description.abstractThe magnetic, chemically peculiar A-star HR 710 (HD 15144, ADS 1849A, AB Cet) has a close companion in a nearly circular orbit. Its 3-d period is unusually short for such stars. The system emits moderately hard X-rays, which likely come from a white dwarf secondary (ADS 1849Ab). The Sr ii spectrum is very strong, and the resonance lines show similar core-nib structure to the stronger Ca K line. We place only loose constraints on a model. There are indications of a lower electron/gas pressure than expected from the star's parallax and brightness. Strong-line profiles and anomalous excitation/ionization indicate significant deviations from traditional models, fixed by T eff , log  g and abundances. Weak spectral-line profiles and wavelength shifts probably indicate abundance patches rather than the presence of a secondary (ADS 1849Ab) spectrum. Our UV–Visual Echelle Spectrograph (UVES) spectra are from only one epoch. Additional low-noise, high-resolution spectra are needed. We discuss the spectrum within the context of abundance stratification.en_US
dc.format.extent1197040 bytes
dc.format.extent3109 bytes
dc.format.mimetypeapplication/pdf
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dc.publisherBlackwell Publishing Ltden_US
dc.rightsJournal compilation © 2008 RASen_US
dc.subject.otherStars: Atmospheresen_US
dc.subject.otherStars: Chemically Peculiaren_US
dc.subject.otherStars: Individual: HR710en_US
dc.subject.otherStars: Magnetic Fieldsen_US
dc.titleHR 710 (HD 15144): an ultra-Sr-rich, magnetic Ap star with a close companion ★en_US
dc.typeArticleen_US
dc.subject.hlbsecondlevelAstronomyen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumDepartment of Astronomy, University of Michigan, Ann Arbor, MI 48109-1042, USAen_US
dc.contributor.affiliationotherEuropean Southern Observatory, Casilla 19001, Santiago 19, Chileen_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/73836/1/j.1365-2966.2007.12827.x.pdf
dc.identifier.doi10.1111/j.1365-2966.2007.12827.xen_US
dc.identifier.sourceMonthly Notices of the Royal Astronomical Societyen_US
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dc.owningcollnameInterdisciplinary and Peer-Reviewed


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