The QUaD Galactic Plane Survey II: A Compact Source Catalog

Abstract

We present a catalog of compact sources derived from the QUaD Galactic Plane Survey. The survey covers ~800 square degrees of the inner galaxy (|b|<4 degrees) in Stokes I, Q and U parameters at 100 and 150 GHz, with angular resolution 5 and 3.5 arcminutes. 505 unique sources are identified in I, of which 239 are spatially matched between frequency bands, with 50 (216) detected at 100 (150) GHz alone; 182 sources are identified as ultracompact HII (UCHII) regions. Approximating the distribution of total intensity source fluxes as a power-law, we find a slope of ${\gamma }_{S,100}=-1.8\pm 0.4$ at 100 GHz, and ${\gamma }_{S,150}=-2.2\pm 0.4$ at 150 GHz. Similarly, the power-law index of the source two-point angular correlation function is ${\gamma }_{\theta ,100}=-1.21\pm 0.04$ and ${\gamma }_{\theta ,150}=-1.25\pm 0.04$. The total intensity spectral index distribution peaks at ${\alpha }_I\sim 0.25$, indicating that dust emission is not the only source of radiation produced by these objects between 100 and 150 GHz; free-free radiation is likely significant in the 100 GHz band. Four sources are detected in polarized intensity P, of which three have matching counterparts in I. Three of the polarized sources lie close to the galactic center, Sagittarius A*, Sagittarius B2 and the Galactic Radio Arc, while the fourth is RCW 49, a bright HII region. An extended polarized source, undetected by the source extraction algorithm on account of its $\sim 0.5^{\circ }$ size, is identified visually, and is an isolated example of large-scale polarized emission oriented distinctly from the bulk galactic dust polarization.

30 pages, 19 figures, two catalogs; submitted to ApJS; maps and catalogs downloadable from <http://find.spa.umn.edu/quad/quad_galactic>

References in corpus (13)

• Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
• From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt survey
• The Mass Distribution and Lifetime of Prestellar Cores in Perseus, Serpens, and Ophiuchus
• An Unambiguous Detection of Faraday Rotation in Sagittarius A*
• Bolocam Survey for 1.1 mm Dust Continuum Emission in the c2d Legacy Clouds. II. Ophiuchus
• Molecular clouds towards RCW 49 and Westerlund 2; Evidence for cluster formation triggered by cloud-cloud collision
• Submillimetre point sources from the Archeops experiment: Very Cold Clumps in the Galactic Plane
• The Rotation Measure and 3.5mm Polarization of Sgr A*
• GBT Multiwavelength Survey of the Galactic Center Region
• CBI limits on 31 GHz excess emission in southern HII regions
• A Catalog of 24um Sources Toward the Galactic Center
• Galaxy Clusters at z>=1: Gas Constraints from the Sunyaev-Zel'dovich Array
• Australia Telescope Compact Array Radio Continuum 1384 and 2368 Mhz Observations of Sagittarius B

Cited by in corpus (17)

• A population of eruptive variable protostars in VVV
• Refining the associations of the Fermi Large Area Telescope Source Catalogs
• The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center
• OGHReS: Large-scale filaments in the outer Galaxy
• Mining the VVV: star formation and embedded clusters
• The VVV Near-IR Galaxy Catalogue beyond the Galactic disk
• A 77-118 GHz Resonance-free Septum Polarizer
• Star formation activity in the southern Galactic HII region G351.63-1.25
• 2 mm GISMO Observations of the Galactic Center. II. A Nonthermal Filament in the Radio Arc and Compact Sources
• SOFIA/GREAT observations of OD and OH rotational lines towards high-mass star forming regions
• Multiwavelength study of the G345.5+1.5 region
• Physical Properties and Kinematics of Dense Cores Associated with Regions of Massive Star Formation from the Southern Sky
• Detections of massive stars in the cluster MCM2005b77, in the star-forming regions GRS G331.34$-$00.36 (S62) and GRS G337.92$-$00.48 (S36)
• Discovery of Luminous Star Formation in PMN1452-5910/IRAS14482-5857: the Pterodactyl Nebula
• Dust Temperature Profiles in Dense Cores Associated With Massive Star-Forming Regions
• Investigating star-formation activity towards the southern HII region RCW 42
• Properties of Contracting Massive Protostellar Cores