Submillimeter Polarization Spectrum of the Carina Nebula

被引：15

作者：

Shariff, Jamil A. ^{[1
]}

Ade, Peter A. R. ^{[2
]}

Angile, Francesco E. ^{[3
]}

Ashton, Peter ^{[4
]}

Benton, Steven J. ^{[5
]}

Devlin, Mark J. ^{[3
]}

Dober, Bradley ^{[6
]}

Fissel, Laura M. ^{[7
]}

Fukui, Yasuo ^{[8
]}

Galitzki, Nicholas ^{[9
]}

Gandilo, Natalie N. ^{[10
,11
]}

Klein, Jeffrey ^{[3
]}

Korotkov, Andrei L. ^{[12
]}

Li, Zhi-Yun ^{[13
]}

Martin, Peter G. ^{[1
]}

Matthews, Tristan G. ^{[14
,15
]}

Moncelsi, Lorenzo ^{[16
]}

Nakamura, Fumitaka ^{[17
]}

Netterfield, Calvin B. ^{[18
,19
]}

Novak, Giles ^{[14
,15
]}

Pascale, Enzo ^{[20
]}

Poidevin, Frederick ^{[21
,22
]}

Santos, Fabio P. ^{[23
]}

Savini, Giorgio ^{[24
]}

Scott, Douglas ^{[25
]}

Diego Soler, Juan ^{[23
]}

Thomas, Nicholas E. ^{[11
]}

Tucker, Carole E. ^{[2
]}

Tucker, Gregory S. ^{[12
]}

Ward-Thompson, Derek ^{[26
]}

机构：

[1] Univ Toronto, CITA, 60 St George St, Toronto, ON M5S 3H8, Canada

[2] Cardiff Univ, Sch Phys & Astron, Queens Bldg, Cardiff CF24 3AA, S Glam, Wales

[3] Univ Penn, Dept Phys & Astron, 209 S 33rd St, Philadelphia, PA 19104 USA

[4] Univ Calif Berkeley, Dept Phys, 366 LeConte Hall, Berkeley, CA 94720 USA

[5] Princeton Univ, Dept Phys, Jadwin Hall, Princeton, NJ 08544 USA

[6] NIST, 325 Broadway, Boulder, CO 80305 USA

[7] Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA

[8] Nagoya Univ, Dept Phys & Astrophys, Nagoya, Aichi 4648602, Japan

[9] Univ Calif San Diego, Ctr Astrophys & Space Sci, 9500 Gilman Dr,0424, La Jolla, CA 92093 USA

[10] Johns Hopkins Univ, Henry A Rowland Dept Phys & Astron, 3701 San Martin Dr, Baltimore, MD 21218 USA

[11] NASA, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA

[12] Brown Univ, Dept Phys, 182 Hope St, Providence, RI 02912 USA

[13] Univ Virginia, Dept Astron, 530 McCormick Rd, Charlottesville, VA 22904 USA

[14] Northwestern Univ, CIERA, 2145 Sheridan Rd, Evanston, IL 60208 USA

[15] Northwestern Univ, Dept Phys & Astron, 2145 Sheridan Rd, Evanston, IL 60208 USA

[16] CALTECH, Div Phys Math & Astron, 1200 E Calif Blvd, Pasadena, CA 91125 USA

[17] Natl Astron Observ, Mitaka, Tokyo 1818588, Japan

[18] Univ Toronto, Dept Phys, 60 St George St, Toronto, ON M5S 1A7, Canada

[19] Univ Toronto, Dept Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada

[20] Univ Roma La Sapienza, Dept Phys, Piazzale Aldo Moro 2, I-00185 Rome, Italy

[21] Inst Astrofis Canarias, E-38205 San Cristobal la Laguna, Tenerife, Spain

[22] Univ La Laguna, Dept Astrofis, E-38206 San Cristobal la Laguna, Tenerife, Spain

[23] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[24] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England

[25] Univ British Columbia, Dept Phys & Astron, 6224 Agr Rd, Vancouver, BC V6T 1Z1, Canada

[26] Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, Lancs, England

来源：

ASTROPHYSICAL JOURNAL | 2019年 / 872卷 / 02期

基金：

加拿大创新基金会; 美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

dust; extinction; instrumentation: polarimeters; ISM: individual objects (Carina); ISM: magnetic fields; polarization; MOLECULAR CLOUDS; MAGNETIC-FIELDS; HOMUNCULUS; EMISSION; SHAPE; MAPS;

D O I：

10.3847/1538-4357/aaff5f

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Linear polarization maps of the Carina Nebula were obtained at 250, 350, and 500 mu m during the 2012 flight of the Balloon-borne Large Aperture Submillimeter Telescope for Polarimetry (BLASTPol). These measurements are combined with Planck 850 mu m 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 mu m polarization fraction). In particular, there is no evidence for a pronounced minimum of the spectrum near 350 mu m, 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.

引用

页数：14

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