SUBMILLIMETER POLARIZATION SPECTRUM IN THE VELA C MOLECULAR CLOUD

ABSTRACT Polarization maps of the Vela C molecular cloud were obtained at 250, 350, and 500 m during the 2012 flight of the balloon-borne telescope BLASTPol. These measurements are used in conjunction with 850 m data from Planck to study the submillimeter spectrum of the polarization fraction for th...

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Bibliographic Details
Published in:	The Astrophysical journal 2016-06, Vol.824 (2), p.84-84
Main Authors:	Gandilo, Natalie N., Ade, Peter A. R., Angilè, Francesco E., Ashton, Peter, Benton, Steven J., Devlin, Mark J., Dober, Bradley, Fissel, Laura M., Fukui, Yasuo, Galitzki, Nicholas, Klein, Jeffrey, Korotkov, Andrei L., Li, Zhi-Yun, Martin, Peter G., Matthews, Tristan G., Moncelsi, Lorenzo, Nakamura, Fumitaka, Netterfield, Calvin B., Novak, Giles, Pascale, Enzo, Poidevin, Frédérick, Santos, Fabio P., Savini, Giorgio, Scott, Douglas, Shariff, Jamil A., Soler, Juan Diego, Thomas, Nicholas E., Tucker, Carole E., Tucker, Gregory S., Ward-Thompson, Derek
Format:	Article
Language:	eng
Subjects:	ASTROPHYSICS, COSMOLOGY AND ASTRONOMY Clouds COSMIC DUST COSMIC GASES DENSITY Dust dust, extinction instrumentation: polarimeters Interstellar radiation INTERSTELLAR SPACE ISM: individual objects (Vela C) ISM: magnetic fields MAGNETIC FIELDS Molecular clouds POLARIMETERS POLARIZATION POROUS MATERIALS SPECTRA STARS submillimeter: ISM techniques: polarimetric TELESCOPES
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Summary:	ABSTRACT Polarization maps of the Vela C molecular cloud were obtained at 250, 350, and 500 m during the 2012 flight of the balloon-borne telescope BLASTPol. These measurements are used in conjunction with 850 m data from Planck to study the submillimeter spectrum of the polarization fraction for this cloud. The spectrum is relatively flat and does not exhibit a pronounced minimum at λ ∼ 350 m as suggested by previous measurements of other molecular clouds. The shape of the spectrum does not depend strongly on the radiative environment of the dust, as quantified by the column density or the dust temperature obtained from Herschel data. The polarization ratios observed in Vela C are consistent with a model of a porous clumpy molecular cloud being uniformly heated by the interstellar radiation field.
ISSN:	0004-637X 1538-4357