An Alma Constraint on the GSC 6214-210 B Circum-Substellar Accretion Disk Mass

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dc.contributor.utaustinauthorKraus, Adam L.en_US
dc.creatorBowler, Brendan P.en_US
dc.creatorAndrews, Sean M.en_US
dc.creatorKraus, Adam L.en_US
dc.creatorIreland, Michael J.en_US
dc.creatorHerczeg, Gregoryen_US
dc.creatorRicci, Lucaen_US
dc.creatorCarpenter, Johnen_US
dc.creatorBrown, Michael E.en_US
dc.date.accessioned2016-10-28T19:38:25Z
dc.date.available2016-10-28T19:38:25Z
dc.date.issued2015-06en_US
dc.description.abstractWe present Atacama Large Millimeter/submillimeter Array (ALMA) observations of GSC 6214-210 A and B, a solar-mass member of the 5-10 Myr Upper Scorpius association with a 15 +/- 2 M-Jup companion orbiting at approximate to 330 AU (2 ''.2). Previous photometry and spectroscopy spanning 0.3-5 mu m revealed optical and thermal excess as well as strong H alpha and Pa beta emission originating from a circum-substellar accretion disk around GSC 6214-210 B, making it the lowest-mass companion with unambiguous evidence of a subdisk. Despite ALMA's unprecedented sensitivity and angular resolution, neither component was detected in our 880 mu m (341 GHz) continuum observations down to a 3 sigma limit of 0.22 mJy/beam. The corresponding constraints on the dust mass and total mass are <0.15M(circle plus) and <0.05 M-Jup, respectively, or <0.003% and <0.3% of the mass of GSC 6214-210 B itself assuming a 100:1 gas-to-dust ratio and characteristic dust temperature of 10-20 K. If the host star possesses a putative circum-stellar disk then at most it is a meager 0.0015% of the primary mass, implying that giant planet Formation has certainly ceased in this system. Considering these limits and its current accretion rate, GSC 6214210 B appears to be at the end stages of assembly and is not expected to gain any appreciable mass over the next few megayears.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipNational Aeronautics and Space Administrationen_US
dc.description.sponsorshipNational Science Foundationen_US
dc.identifierdoi:10.15781/T2930NX8Q
dc.identifier.citationBowler, Brendan P., Sean M. Andrews, Adam L. Kraus, Michael J. Ireland, Gregory Herczeg, Luca Ricci, John Carpenter, and Michael E. Brown. "An ALMA Constraint on the GSC 6214-210 B Circum-Substellar Accretion Disk Mass." The Astrophysical Journal Letters, Vol. 805, No. 2 (Jun., 2015): L17.en_US
dc.identifier.doi10.1088/2041-8205/805/2/l17en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/2152/43112
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journal Lettersen_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.rights.restrictionOpenen_US
dc.subjectaccretion, accretion disksen_US
dc.subjectbrown dwarfsen_US
dc.subjectstars: individual (gscen_US
dc.subject6214-210)en_US
dc.subjectscorpius ob associationen_US
dc.subjectgiant planet Formationen_US
dc.subjectsun-like staren_US
dc.subjectcircumplanetary disksen_US
dc.subjectwide orbitsen_US
dc.subjectcircumstellar disksen_US
dc.subjecthr 8799en_US
dc.subjectcompanionsen_US
dc.subjectevolutionen_US
dc.subjectsystemsen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleAn Alma Constraint on the GSC 6214-210 B Circum-Substellar Accretion Disk Massen_US
dc.typeArticleen_US

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