Comparing Submillimeter Polarized Emission with Near-infrared Polarization of Background Stars for the Vela C Molecular Cloud
We present a large-scale combination of near-infrared (near-IR) interstellar polarization data from background starlight with polarized emission data at submillimeter wavelengths for the Vela C molecular cloud. The near-IR data consist of more than 6700 detections probing a range of visual extinctio...
Published in: | The Astrophysical Journal |
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American Astronomical Society (AAS)
2017
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Online Access: | https://clok.uclan.ac.uk/21682/ https://clok.uclan.ac.uk/21682/1/pdf.pdf https://doi.org/10.3847/1538-4357/aa62a7 |
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ftunivclancas:oai:clok.uclan.ac.uk:21682 2024-05-12T07:53:19+00:00 Comparing Submillimeter Polarized Emission with Near-infrared Polarization of Background Stars for the Vela C Molecular Cloud Santos, Fabio P. Ade, Peter A. R. Angilè, Francesco E. Ashton, Peter Benton, Steven J. Devlin, Mark J. Dober, Bradley Fissel, Laura M. Fukui, Yasuo Galitzki, Nicholas Gandilo, Natalie N. 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 Savini, Giorgio Scott, Douglas Shariff, Jamil A. Soler, Juan Diego Thomas, Nicholas E. Tucker, Carole E. Tucker, Gregory S. Ward-Thompson, Derek 2017-03-15 application/pdf https://clok.uclan.ac.uk/21682/ https://clok.uclan.ac.uk/21682/1/pdf.pdf https://doi.org/10.3847/1538-4357/aa62a7 en eng American Astronomical Society (AAS) https://clok.uclan.ac.uk/21682/1/pdf.pdf Santos, Fabio P., Ade, Peter A. R., Angilè, Francesco E., Ashton, Peter, Benton, Steven J., Devlin, Mark J., Dober, Bradley, Fissel, Laura M., Fukui, Yasuo et al (2017) Comparing Submillimeter Polarized Emission with Near-infrared Polarization of Background Stars for the Vela C Molecular Cloud. The Astrophysical Journal, 837 (2). p. 161. ISSN 0004-637X doi:10.3847/1538-4357/aa62a7 cc_by_nc_nd_4 F500 - Astronomy Article PeerReviewed 2017 ftunivclancas https://doi.org/10.3847/1538-4357/aa62a7 2024-04-17T14:23:14Z We present a large-scale combination of near-infrared (near-IR) interstellar polarization data from background starlight with polarized emission data at submillimeter wavelengths for the Vela C molecular cloud. The near-IR data consist of more than 6700 detections probing a range of visual extinctions between 2 and 20 mag in and around the cloud. The submillimeter data were collected in Antarctica by the Balloon-borne Large Aperture Submillimeter Telescope for Polarimetry. This is the first direct combination of near-IR and submillimeter polarization data for a molecular cloud aimed at measuring the “polarization efficiency ratio” (Reff ), a quantity that is expected to depend only on grainintrinsic physical properties. It is defined as p500 (pI tV ), where p500 and pI are polarization fractions at 500 mm and the I band, respectively, and tV is the optical depth. To ensure that the same column density of material is producing both polarization from emission and from extinction, we conducted a careful selection of near-background stars using 2MASS, Herschel, and Planck data. This selection excludes objects contaminated by the Galactic diffuse background material as well as objects located in the foreground. Accounting for statistical and systematic uncertainties, we estimate an average Reff value of 2.4±0.8, which can be used to test the predictions of dust grain models designed for molecular clouds when such predictions become available. The ratio Reff appears to be relatively flat as a function of the cloud depth for the range of visual extinctions probed. Article in Journal/Newspaper Antarc* Antarctica University of Central Lancashire: CLOK - Central Lancashire Online Knowledge Starlight ENVELOPE(64.483,64.483,-70.200,-70.200) The Astrophysical Journal 837 2 161 |
institution |
Open Polar |
collection |
University of Central Lancashire: CLOK - Central Lancashire Online Knowledge |
op_collection_id |
ftunivclancas |
language |
English |
topic |
F500 - Astronomy |
spellingShingle |
F500 - Astronomy Santos, Fabio P. Ade, Peter A. R. Angilè, Francesco E. Ashton, Peter Benton, Steven J. Devlin, Mark J. Dober, Bradley Fissel, Laura M. Fukui, Yasuo Galitzki, Nicholas Gandilo, Natalie N. 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 Savini, Giorgio Scott, Douglas Shariff, Jamil A. Soler, Juan Diego Thomas, Nicholas E. Tucker, Carole E. Tucker, Gregory S. Ward-Thompson, Derek Comparing Submillimeter Polarized Emission with Near-infrared Polarization of Background Stars for the Vela C Molecular Cloud |
topic_facet |
F500 - Astronomy |
description |
We present a large-scale combination of near-infrared (near-IR) interstellar polarization data from background starlight with polarized emission data at submillimeter wavelengths for the Vela C molecular cloud. The near-IR data consist of more than 6700 detections probing a range of visual extinctions between 2 and 20 mag in and around the cloud. The submillimeter data were collected in Antarctica by the Balloon-borne Large Aperture Submillimeter Telescope for Polarimetry. This is the first direct combination of near-IR and submillimeter polarization data for a molecular cloud aimed at measuring the “polarization efficiency ratio” (Reff ), a quantity that is expected to depend only on grainintrinsic physical properties. It is defined as p500 (pI tV ), where p500 and pI are polarization fractions at 500 mm and the I band, respectively, and tV is the optical depth. To ensure that the same column density of material is producing both polarization from emission and from extinction, we conducted a careful selection of near-background stars using 2MASS, Herschel, and Planck data. This selection excludes objects contaminated by the Galactic diffuse background material as well as objects located in the foreground. Accounting for statistical and systematic uncertainties, we estimate an average Reff value of 2.4±0.8, which can be used to test the predictions of dust grain models designed for molecular clouds when such predictions become available. The ratio Reff appears to be relatively flat as a function of the cloud depth for the range of visual extinctions probed. |
format |
Article in Journal/Newspaper |
author |
Santos, Fabio P. Ade, Peter A. R. Angilè, Francesco E. Ashton, Peter Benton, Steven J. Devlin, Mark J. Dober, Bradley Fissel, Laura M. Fukui, Yasuo Galitzki, Nicholas Gandilo, Natalie N. 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 Savini, Giorgio Scott, Douglas Shariff, Jamil A. Soler, Juan Diego Thomas, Nicholas E. Tucker, Carole E. Tucker, Gregory S. Ward-Thompson, Derek |
author_facet |
Santos, Fabio P. Ade, Peter A. R. Angilè, Francesco E. Ashton, Peter Benton, Steven J. Devlin, Mark J. Dober, Bradley Fissel, Laura M. Fukui, Yasuo Galitzki, Nicholas Gandilo, Natalie N. 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 Savini, Giorgio Scott, Douglas Shariff, Jamil A. Soler, Juan Diego Thomas, Nicholas E. Tucker, Carole E. Tucker, Gregory S. Ward-Thompson, Derek |
author_sort |
Santos, Fabio P. |
title |
Comparing Submillimeter Polarized Emission with Near-infrared Polarization of Background Stars for the Vela C Molecular Cloud |
title_short |
Comparing Submillimeter Polarized Emission with Near-infrared Polarization of Background Stars for the Vela C Molecular Cloud |
title_full |
Comparing Submillimeter Polarized Emission with Near-infrared Polarization of Background Stars for the Vela C Molecular Cloud |
title_fullStr |
Comparing Submillimeter Polarized Emission with Near-infrared Polarization of Background Stars for the Vela C Molecular Cloud |
title_full_unstemmed |
Comparing Submillimeter Polarized Emission with Near-infrared Polarization of Background Stars for the Vela C Molecular Cloud |
title_sort |
comparing submillimeter polarized emission with near-infrared polarization of background stars for the vela c molecular cloud |
publisher |
American Astronomical Society (AAS) |
publishDate |
2017 |
url |
https://clok.uclan.ac.uk/21682/ https://clok.uclan.ac.uk/21682/1/pdf.pdf https://doi.org/10.3847/1538-4357/aa62a7 |
long_lat |
ENVELOPE(64.483,64.483,-70.200,-70.200) |
geographic |
Starlight |
geographic_facet |
Starlight |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://clok.uclan.ac.uk/21682/1/pdf.pdf Santos, Fabio P., Ade, Peter A. R., Angilè, Francesco E., Ashton, Peter, Benton, Steven J., Devlin, Mark J., Dober, Bradley, Fissel, Laura M., Fukui, Yasuo et al (2017) Comparing Submillimeter Polarized Emission with Near-infrared Polarization of Background Stars for the Vela C Molecular Cloud. The Astrophysical Journal, 837 (2). p. 161. ISSN 0004-637X doi:10.3847/1538-4357/aa62a7 |
op_rights |
cc_by_nc_nd_4 |
op_doi |
https://doi.org/10.3847/1538-4357/aa62a7 |
container_title |
The Astrophysical Journal |
container_volume |
837 |
container_issue |
2 |
container_start_page |
161 |
_version_ |
1798842101037793280 |