New results on the submillimeter polarization spectrum of the Orion Molecular Cloud

John E. Vaillancourt; C. Darren Dowell; Roger H. Hildebrand; Larry Kirby; Megan M. Krejny; Hua Bai Li; Giles Novak; Martin Houde; Hiroko Shinnaga; Michael Attard

doi:10.1086/589152

New results on the submillimeter polarization spectrum of the Orion Molecular Cloud

John E. Vaillancourt, C. Darren Dowell, Roger H. Hildebrand, Larry Kirby, Megan M. Krejny, Hua Bai Li, Giles Novak, Martin Houde, Hiroko Shinnaga, Michael Attard

Physics and Astronomy

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50 Scopus citations

Abstract

We have used the SHARP polarimeter at the Caltech Submillimeter Observatory to map the polarization at wavelengths of 350 and 450 μm m a ∼2′ × 3′ region of the Orion Molecular Cloud. The map covers the brightest region of the OMC-1 ridge including the Kleinmann-Low (KL) nebula and the submillimeter source Orion-south. The ratio of 450 to 350 μm polarization is ∼1.3 ± 0.3 in the outer parts of the cloud and drops by more than a factor of 2 toward KL. The outer cloud ratio is consistent with measurements in other clouds at similar wavelengths and confirms previous measurements placing the minimum of the polarization ratio in dusty molecular clouds at. λ ∼ 350 μm.

Original language	English (US)
Pages (from-to)	L25-L28
Journal	Astrophysical Journal
Volume	679
Issue number	1 PART 2
DOIs	https://doi.org/10.1086/589152
State	Published - 2008

Keywords

Dust, extinction
ISM: clouds
ISM: individual (OMC-1)
Polarization
Submillimeter

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/589152

Cite this

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title = "New results on the submillimeter polarization spectrum of the Orion Molecular Cloud",

abstract = "We have used the SHARP polarimeter at the Caltech Submillimeter Observatory to map the polarization at wavelengths of 350 and 450 μm m a ∼2′ × 3′ region of the Orion Molecular Cloud. The map covers the brightest region of the OMC-1 ridge including the Kleinmann-Low (KL) nebula and the submillimeter source Orion-south. The ratio of 450 to 350 μm polarization is ∼1.3 ± 0.3 in the outer parts of the cloud and drops by more than a factor of 2 toward KL. The outer cloud ratio is consistent with measurements in other clouds at similar wavelengths and confirms previous measurements placing the minimum of the polarization ratio in dusty molecular clouds at. λ ∼ 350 μm.",

keywords = "Dust, extinction, ISM: clouds, ISM: individual (OMC-1), Polarization, Submillimeter",

author = "Vaillancourt, {John E.} and Dowell, {C. Darren} and Hildebrand, {Roger H.} and Larry Kirby and Krejny, {Megan M.} and Li, {Hua Bai} and Giles Novak and Martin Houde and Hiroko Shinnaga and Michael Attard",

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volume = "679",

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TY - JOUR

T1 - New results on the submillimeter polarization spectrum of the Orion Molecular Cloud

AU - Vaillancourt, John E.

AU - Dowell, C. Darren

AU - Hildebrand, Roger H.

AU - Kirby, Larry

AU - Krejny, Megan M.

AU - Li, Hua Bai

AU - Novak, Giles

AU - Houde, Martin

AU - Shinnaga, Hiroko

AU - Attard, Michael

PY - 2008

Y1 - 2008

N2 - We have used the SHARP polarimeter at the Caltech Submillimeter Observatory to map the polarization at wavelengths of 350 and 450 μm m a ∼2′ × 3′ region of the Orion Molecular Cloud. The map covers the brightest region of the OMC-1 ridge including the Kleinmann-Low (KL) nebula and the submillimeter source Orion-south. The ratio of 450 to 350 μm polarization is ∼1.3 ± 0.3 in the outer parts of the cloud and drops by more than a factor of 2 toward KL. The outer cloud ratio is consistent with measurements in other clouds at similar wavelengths and confirms previous measurements placing the minimum of the polarization ratio in dusty molecular clouds at. λ ∼ 350 μm.

AB - We have used the SHARP polarimeter at the Caltech Submillimeter Observatory to map the polarization at wavelengths of 350 and 450 μm m a ∼2′ × 3′ region of the Orion Molecular Cloud. The map covers the brightest region of the OMC-1 ridge including the Kleinmann-Low (KL) nebula and the submillimeter source Orion-south. The ratio of 450 to 350 μm polarization is ∼1.3 ± 0.3 in the outer parts of the cloud and drops by more than a factor of 2 toward KL. The outer cloud ratio is consistent with measurements in other clouds at similar wavelengths and confirms previous measurements placing the minimum of the polarization ratio in dusty molecular clouds at. λ ∼ 350 μm.

KW - Dust, extinction

KW - ISM: clouds

KW - ISM: individual (OMC-1)

KW - Polarization

KW - Submillimeter

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DO - 10.1086/589152

M3 - Article

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SP - L25-L28

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART 2

ER -

New results on the submillimeter polarization spectrum of the Orion Molecular Cloud

Abstract

Keywords

ASJC Scopus subject areas

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