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dc.creatorSchlingman, Wayne M.en_US
dc.creatorShirley, Yancy L.en_US
dc.creatorSchenk, David E.en_US
dc.creatorRosolowsky, Eriken_US
dc.creatorBally, Johnen_US
dc.creatorBattersby, Caraen_US
dc.creatorDunham, Miranda K.en_US
dc.creatorEllsworth-Bowers, Timothy P.en_US
dc.creatorEvans, Neal J., IIen_US
dc.creatorGinsburg, Adamen_US
dc.creatorStringfellow, Guyen_US
dc.date.accessioned2016-10-28T19:35:29Z
dc.date.available2016-10-28T19:35:29Z
dc.date.issued2011-08en_US
dc.identifierdoi:10.15781/T20C4SN4B
dc.identifier.citationSchlingman, Wayne M., Yancy L. Shirley, David E. Schenk, Erik Rosolowsky, John Bally, Cara Battersby, Miranda K. Dunham et al. "The Bolocam Galactic plane survey. V. HCO+ and N2H+ spectroscopy of 1.1 mm dust continuum sources." The Astrophysical Journal Supplement Series, Vol. 195, No. 2 (Aug., 2011): 14.en_US
dc.identifier.issn0067-0049en_US
dc.identifier.urihttp://hdl.handle.net/2152/42975
dc.description.abstractWe present the results of observations of 1882 sources in the Bolocam Galactic Plane Survey (BGPS) at 1.1 mm with the 10 m Henrich Hertz Telescope simultaneously in HCO+ J = 3-2 and N2H+ J = 3-2. We detect 77% of these sources in HCO+ and 51% in N2H+ at greater than 3 sigma. We find a strong correlation between the integrated intensity of both dense gas tracers and the 1.1 mm dust emission of BGPS sources. We determine kinematic distances for 529 sources (440 in the first quadrant breaking the distance ambiguity and 89 in the second quadrant). We derive the size, mass, and average density for this subset of clumps. The median size of BGPS clumps is 0.75 pc with a median mass of 330M(circle dot) (assuming T-Dust = 20 K). The median HCO+ linewidth is 2.9 km s(-1) indicating that BGPS clumps are dominated by supersonic turbulence or unresolved kinematic motions. We find no evidence for a size-linewidth relationship for BGPS clumps. We analyze the effects of the assumed dust temperature on the derived clump properties with a Monte Carlo simulation and find that changing the temperature distribution will change the median source properties (mass, volume-averaged number density, surface density) by factors of a few. The observed differential mass distribution has a power-law slope that is intermediate between that observed for diffuse CO clouds and the stellar initial mass function. BGPS clumps represent a wide range of objects (from dense cores to more diffuse clumps) and are typically characterized by larger sizes and lower densities than previously published surveys of high-mass star-forming regions. This collection of objects is a less-biased sample of star-forming regions in the Milky Way that likely span a wide range of evolutionary states.en_US
dc.description.sponsorshipNSF AST-1008577en_US
dc.language.isoEnglishen_US
dc.relation.ispartofen_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.subjectgalaxy: kinematics and dynamicsen_US
dc.subjectgalaxy: structureen_US
dc.subjectism: cloudsen_US
dc.subjectism:en_US
dc.subjectkinematics and dynamicsen_US
dc.subjectstars: Formationen_US
dc.subjectsubmillimeter: ismen_US
dc.subjectsurveysen_US
dc.subjectmass star-Formationen_US
dc.subjectinfrared dark cloudsen_US
dc.subjectmolecular cloudsen_US
dc.subjectphysical-propertiesen_US
dc.subjectmethanol masersen_US
dc.subjectwater masersen_US
dc.subjecttrigonometricen_US
dc.subjectparallaxesen_US
dc.subjectforming regionsen_US
dc.subjectinner galaxyen_US
dc.subjectii regionsen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleThe Bolocam Galactic Plane Survey. V. HCO+ and N2H+ Spectroscopy of 1.1 mm Dust Continuum Sourcesen_US
dc.typeArticleen_US
dc.description.departmentAstronomyen_US
dc.rights.restrictionOpenen_US
dc.identifier.doi10.1088/0067-0049/195/2/14en_US
dc.contributor.utaustinauthorEvans, Neal J., IIen_US
dc.relation.ispartofserialAstrophysical Journal Supplement Seriesen_US


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