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Submillimeter Polarization Spectrum of the Carina Nebula

Shariff, Jamil A. and Moncelsi, Lorenzo (2019) Submillimeter Polarization Spectrum of the Carina Nebula. Astrophysical Journal, 872 (2). Art. No. 197. ISSN 1538-4357. http://resolver.caltech.edu/CaltechAUTHORS:20190225-101031654

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Abstract

Linear polarization maps of the Carina Nebula were obtained at 250, 350, and 500 μm during the 2012 flight of the Balloon-borne Large Aperture Submillimeter Telescope for Polarimetry (BLASTPol). These measurements are combined with Planck 850 μm data in order to produce a submillimeter spectrum of the polarization fraction of the dust emission, averaged over the cloud. This spectrum is flat to within ±15% (relative to the 350 μm polarization fraction). In particular, there is no evidence for a pronounced minimum of the spectrum near 350 μm, as suggested by previous ground-based measurements of other molecular clouds. This result of a flat polarization spectrum in Carina is consistent with recently published BLASTPol measurements of the Vela C molecular cloud and also agrees with a published model for an externally illuminated, dense molecular cloud by Bethell and collaborators. The shape of the spectrum in Carina does not show any dependence on the radiative environment of the dust, as quantified by the Planck-derived dust temperature or dust optical depth at 353 GHz.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.3847/1538-4357/aaff5fDOIArticle
https://arxiv.org/abs/1809.06375arXivDiscussion Paper
ORCID:
AuthorORCID
Moncelsi, Lorenzo0000-0002-4242-3015
Additional Information:© 2019 The American Astronomical Society. Received 2018 September 13; revised 2018 December 28; accepted 2019 January 15; published 2019 February 25. The BLASTPol collaboration acknowledges support from NASA (through grant Nos. NAG5-12785, NAG5-13301, NNGO-6GI11G, and NNX0-9AB98G, and the Illinois Space Grant Consortium), the Canadian Space Agency, the Leverhulme Trust through the Research Project Grant F/00 407/BN, Canada's Natural Sciences and Engineering Research Council, the Canada Foundation for Innovation, the Ontario Innovation Trust, and the US National Science Foundation Office of Polar Programs. This work was based in part on observations obtained with Planck (http://www.esa.int/Planck), an ESA science mission with instruments and contributions directly funded by ESA Member States, NASA, and Canada. C.B.N. also acknowledges support from the Canadian Institute for Advanced Research. F.P.S. is supported by CAPES grant 2397/13-7. F.P. acknowledges the European Union's Horizon 2020 research and innovation programme under grant agreement number 687312 (RADIOFOREGROUNDS). P.A. is supported through Reach for the Stars, a GK-12 program supported by the National Science Foundation under grant DGE-0948017. L.M.F. is a Jansky Fellow of the National Radio Astronomy Observatory (NRAO). NRAO is a facility of the National Science Foundation (NSF), operated under cooperative agreement by Associated Universities, Inc. Finally, we thank the Columbia Scientific Balloon Facility staff for their outstanding work.
Funders:
Funding AgencyGrant Number
NASANAG5-12785
NASANAG5-13301
NASANNGO-6GI11G
NASANNX0-9AB98G
Illinois Space Grant ConsortiumUNSPECIFIED
Canadian Space Agency (CSA)UNSPECIFIED
Leverhulme TrustF/00 407/BN
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Canada Foundation for InnovationUNSPECIFIED
Ontario Innovation TrustUNSPECIFIED
NSFUNSPECIFIED
ESA Member StatesUNSPECIFIED
Canadian Institute for Advanced Research (CIFAR)UNSPECIFIED
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)2397/13-7
European Research Council (ERC)687312
NSF Graduate Research FellowshipDGE-0948017
Jansky FellowshipUNSPECIFIED
National Radio Astronomy ObservatoryUNSPECIFIED
Associated Universities, Inc.UNSPECIFIED
Subject Keywords:dust, extinction – instrumentation: polarimeters – ISM: individual objects (Carina) – ISM: magnetic fields – polarization
Record Number:CaltechAUTHORS:20190225-101031654
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20190225-101031654
Official Citation:Jamil A. Shariff et al 2019 ApJ 872 197
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93219
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:25 Feb 2019 18:30
Last Modified:25 Feb 2019 18:30

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