Culverhouse, T. and Ade, P. and Bock, J. and Bowden, M. and Brown, M.L. and Cahill, G. and Castro, P.G. and Church, S. and Friedman, R. and Ganga, K. and Gear, W.K. and Gupta, S. and Hinderks, J. and Kovac, J. and Lange, A.E. and Leitch, E. and Melhuish, S.J. and Memari, Y. and Murphy, J.A. and Orlando, A. and Pryke, C. and Schwarz, R. and O'Sullivan, C. and Piccirillo, L. and Rajguru, N. and Rusholme, B. and Taylor, A.N. and Thompson, K.L. and Turner, A.H. and Wu, E.Y.S. and Zemcov, M.
The QUAD Galactic Plane Survey II: A Compact Source Catalog.
Astrophysical Journal Supplement, 195 (8).
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) in Stokes I, Q, and U parameters at 100 and 150 GHz,
with angular resolution 5 and 3.5 arcminutes respectively. 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 H II (UCH II) regions. Approximating the distribution of total intensity source
fluxes as a power-law, we find a slope of γς,100
= -1:80:4 at 100 GHz, and γς,150 = -2:20:4 at 150 GHz.
Similarly, the power-law index of the source two-point angular correlation function is
γθ,100 = -1:210:04 and
γθ,150 = -1:250:04. The total intensity spectral index distribution peaks at αI - 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 H II region. An extended
polarized source, undetected by the source extraction algorithm on account of its - 0:5 size, is identified
visually, and is an isolated example of large-scale polarized emission oriented distinctly from the bulk galactic
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