Detection Of Low-Mass-Ratio Stellar Binary Systems

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dc.contributor.utaustinauthorGullikson, Kevinen_US
dc.contributor.utaustinauthorDodson-Robinson, Sarahen_US
dc.creatorGullikson, Kevinen_US
dc.creatorDodson-Robinson, Sarahen_US
dc.date.accessioned2016-04-22T19:48:37Z
dc.date.available2016-04-22T19:48:37Z
dc.date.issued2013-01en
dc.description.abstractO- and B-type stars are often found in binary systems, but the low binary mass-ratio regime is relatively unexplored due to observational difficulties. Binary systems with low mass ratios may have formed through fragmentation of the circumstellar disk rather than molecular cloud core fragmentation. We describe a new technique sensitive to G-and K-type companions to early B stars, a mass ratio of roughly 0.1, using high-resolution, high signal-to-noise spectra. We apply this technique to a sample of archived VLT/CRIRES observations of nearby B stars in the CO bandhead near 2300 nm. While there are no unambiguous binary detections in our sample, we identify HIP 92855 and HIP 26713 as binary candidates warranting follow-up observations. We use our non-detections to determine upper limits to the frequency of FGK stars orbiting early B-type primaries.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipNational Science Foundation CAREER award ST-1055910en_US
dc.description.sponsorshipUniversity of Texas College of Natural Sciencesen_US
dc.identifierdoi:10.15781/T2G22V
dc.identifier.citationGullikson, Kevin, and Sarah Dodson-Robinson. >Detection of Low-Mass-ratio Stellar Binary Systems.> The Astronomical Journal, Vol. 145, No. 1 (Jan., 2013): 3.en_US
dc.identifier.doi10.1088/0004-6256/145/1/3en_US
dc.identifier.issn0004-6256en_US
dc.identifier.urihttp://hdl.handle.net/2152/34552
dc.language.isoEnglishen_US
dc.relation.ispartofserialAstronomical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectbinaries: spectroscopicen_US
dc.subjectstars: early-typeen_US
dc.subjectstars: formationen_US
dc.subjectradiation-hydrodynamic simulationsen_US
dc.subjectx-ray-emissionen_US
dc.subjectstar-formationen_US
dc.subjectprotobinary systemsen_US
dc.subjectfission theoryen_US
dc.subjectgiant planetsen_US
dc.subjectwide orbitsen_US
dc.subjectfragmentationen_US
dc.subjectevolutionen_US
dc.subjectmultiplicityen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleDetection Of Low-Mass-Ratio Stellar Binary Systemsen_US
dc.typeArticleen_US

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