HAWC+/SOFIA Multiwavelength Polarimetric Observations of OMC-1

David T. Chuss; B. G. Andersson; John Bally; Jessie L. Dotson; C. Darren Dowell; Jordan A. Guerra; Doyal A. Harper; Martin Houde; Terry Jay Jones; A. Lazarian; Enrique Lopez Rodriguez; Joseph M. Michail; Mark R. Morris; Giles Novak; Javad Siah; Johannes Staguhn; John E. Vaillancourt; C. G. Volpert; Michael Werner; Edward J. Wollack; Dominic J. Benford; Marc Berthoud; Erin G. Cox; Richard Crutcher; Daniel A. Dale; L. M. Fissel; Paul F. Goldsmith; Ryan T. Hamilton; Shaul Hanany; Thomas K. Henning; Leslie W. Looney; S. Harvey Moseley; Fabio P. Santos; Ian Stephens; Konstantinos Tassis; Christopher Q. Trinh; Eric Van Camp; Derek Ward-Thompson

doi:10.3847/1538-4357/aafd37

HAWC+/SOFIA Multiwavelength Polarimetric Observations of OMC-1

David T. Chuss, B. G. Andersson, John Bally, Jessie L. Dotson, C. Darren Dowell, Jordan A. Guerra, Doyal A. Harper, Martin Houde, Terry Jay Jones, A. Lazarian, Enrique Lopez Rodriguez, Joseph M. Michail, Mark R. Morris, Giles Novak, Javad Siah, Johannes Staguhn, John E. Vaillancourt, C. G. Volpert, Michael Werner, Edward J. WollackDominic J. Benford, Marc Berthoud, Erin G. Cox, Richard Crutcher, Daniel A. Dale, L. M. Fissel, Paul F. Goldsmith, Ryan T. Hamilton, Shaul Hanany, Thomas K. Henning, Leslie W. Looney, S. Harvey Moseley, Fabio P. Santos, Ian Stephens, Konstantinos Tassis, Christopher Q. Trinh, Eric Van Camp, Derek Ward-Thompson

Physics and Astronomy (Twin Cities)

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64 Scopus citations

Abstract

We report new polarimetric and photometric maps of the massive star-forming region OMC-1 using the HAWC+ instrument on the Stratospheric Observatory for Infrared Astronomy. We present continuum polarimetric and photometric measurements of this region at 53, 89, 154, and 214 μm at angular resolutions of 5″, 8″, 14″, and 19″ for the four bands, respectively. The photometric maps enable the computation of improved spectral energy distributions for the region. We find that at the longer wavelengths, the inferred magnetic field configuration matches the "hourglass" configuration seen in previous studies, indicating magnetically regulated star formation. The field morphology differs at the shorter wavelengths. The magnetic field inferred at these wavelengths traces the bipolar structure of the explosive Becklin-Neugebauer/Kleinman-Low outflow emerging from OMC-1 behind the Orion Nebula. Using statistical methods to estimate the field strength in the region, we find that the explosion dominates the magnetic field near the center of the feature. Farther out, the magnetic field is close to energetic equilibrium with the ejecta and may be providing confinement to the explosion. The correlation between polarization fraction and the local polarization angle dispersion indicates that the depolarization as a function of unpolarized intensity is a result of intrinsic field geometry as opposed to decreases in grain alignment efficiency in denser regions.

Original language	English (US)
Article number	187
Journal	Astrophysical Journal
Volume	872
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/aafd37
State	Published - 2019

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© 2019. The American Astronomical Society. All rights reserved..

Keywords

ISM: clouds
ISM: magnetic fields
stars: formation

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Chuss, D. T., Andersson, B. G., Bally, J., Dotson, J. L., Darren Dowell, C., Guerra, J. A., Harper, D. A., Houde, M., Jay Jones, T., Lazarian, A., Lopez Rodriguez, E., Michail, J. M., Morris, M. R., Novak, G., Siah, J., Staguhn, J., Vaillancourt, J. E., Volpert, C. G., Werner, M., ... Ward-Thompson, D. (2019). HAWC+/SOFIA Multiwavelength Polarimetric Observations of OMC-1. Astrophysical Journal, 872(2), Article 187. https://doi.org/10.3847/1538-4357/aafd37

Chuss, DT, Andersson, BG, Bally, J, Dotson, JL, Darren Dowell, C, Guerra, JA, Harper, DA, Houde, M, Jay Jones, T, Lazarian, A, Lopez Rodriguez, E, Michail, JM, Morris, MR, Novak, G, Siah, J, Staguhn, J, Vaillancourt, JE, Volpert, CG, Werner, M, Wollack, EJ, Benford, DJ, Berthoud, M, Cox, EG, Crutcher, R, Dale, DA, Fissel, LM, Goldsmith, PF, Hamilton, RT, Hanany, S, Henning, TK, Looney, LW, Harvey Moseley, S, Santos, FP, Stephens, I, Tassis, K, Trinh, CQ, Van Camp, E & Ward-Thompson, D 2019, 'HAWC+/SOFIA Multiwavelength Polarimetric Observations of OMC-1', Astrophysical Journal, vol. 872, no. 2, 187. https://doi.org/10.3847/1538-4357/aafd37

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abstract = "We report new polarimetric and photometric maps of the massive star-forming region OMC-1 using the HAWC+ instrument on the Stratospheric Observatory for Infrared Astronomy. We present continuum polarimetric and photometric measurements of this region at 53, 89, 154, and 214 μm at angular resolutions of 5″, 8″, 14″, and 19″ for the four bands, respectively. The photometric maps enable the computation of improved spectral energy distributions for the region. We find that at the longer wavelengths, the inferred magnetic field configuration matches the {"}hourglass{"} configuration seen in previous studies, indicating magnetically regulated star formation. The field morphology differs at the shorter wavelengths. The magnetic field inferred at these wavelengths traces the bipolar structure of the explosive Becklin-Neugebauer/Kleinman-Low outflow emerging from OMC-1 behind the Orion Nebula. Using statistical methods to estimate the field strength in the region, we find that the explosion dominates the magnetic field near the center of the feature. Farther out, the magnetic field is close to energetic equilibrium with the ejecta and may be providing confinement to the explosion. The correlation between polarization fraction and the local polarization angle dispersion indicates that the depolarization as a function of unpolarized intensity is a result of intrinsic field geometry as opposed to decreases in grain alignment efficiency in denser regions.",

keywords = "ISM: clouds, ISM: magnetic fields, stars: formation",

author = "Chuss, {David T.} and Andersson, {B. G.} and John Bally and Dotson, {Jessie L.} and {Darren Dowell}, C. and Guerra, {Jordan A.} and Harper, {Doyal A.} and Martin Houde and {Jay Jones}, Terry and A. Lazarian and {Lopez Rodriguez}, Enrique and Michail, {Joseph M.} and Morris, {Mark R.} and Giles Novak and Javad Siah and Johannes Staguhn and Vaillancourt, {John E.} and Volpert, {C. G.} and Michael Werner and Wollack, {Edward J.} and Benford, {Dominic J.} and Marc Berthoud and Cox, {Erin G.} and Richard Crutcher and Dale, {Daniel A.} and Fissel, {L. M.} and Goldsmith, {Paul F.} and Hamilton, {Ryan T.} and Shaul Hanany and Henning, {Thomas K.} and Looney, {Leslie W.} and {Harvey Moseley}, S. and Santos, {Fabio P.} and Ian Stephens and Konstantinos Tassis and Trinh, {Christopher Q.} and {Van Camp}, Eric and Derek Ward-Thompson",

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language = "English (US)",

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T1 - HAWC+/SOFIA Multiwavelength Polarimetric Observations of OMC-1

AU - Chuss, David T.

AU - Andersson, B. G.

AU - Bally, John

AU - Dotson, Jessie L.

AU - Darren Dowell, C.

AU - Guerra, Jordan A.

AU - Harper, Doyal A.

AU - Houde, Martin

AU - Jay Jones, Terry

AU - Lazarian, A.

AU - Lopez Rodriguez, Enrique

AU - Michail, Joseph M.

AU - Morris, Mark R.

AU - Novak, Giles

AU - Siah, Javad

AU - Staguhn, Johannes

AU - Vaillancourt, John E.

AU - Volpert, C. G.

AU - Werner, Michael

AU - Wollack, Edward J.

AU - Benford, Dominic J.

AU - Berthoud, Marc

AU - Cox, Erin G.

AU - Crutcher, Richard

AU - Dale, Daniel A.

AU - Fissel, L. M.

AU - Goldsmith, Paul F.

AU - Hamilton, Ryan T.

AU - Hanany, Shaul

AU - Henning, Thomas K.

AU - Looney, Leslie W.

AU - Harvey Moseley, S.

AU - Santos, Fabio P.

AU - Stephens, Ian

AU - Tassis, Konstantinos

AU - Trinh, Christopher Q.

AU - Van Camp, Eric

AU - Ward-Thompson, Derek

PY - 2019

Y1 - 2019

N2 - We report new polarimetric and photometric maps of the massive star-forming region OMC-1 using the HAWC+ instrument on the Stratospheric Observatory for Infrared Astronomy. We present continuum polarimetric and photometric measurements of this region at 53, 89, 154, and 214 μm at angular resolutions of 5″, 8″, 14″, and 19″ for the four bands, respectively. The photometric maps enable the computation of improved spectral energy distributions for the region. We find that at the longer wavelengths, the inferred magnetic field configuration matches the "hourglass" configuration seen in previous studies, indicating magnetically regulated star formation. The field morphology differs at the shorter wavelengths. The magnetic field inferred at these wavelengths traces the bipolar structure of the explosive Becklin-Neugebauer/Kleinman-Low outflow emerging from OMC-1 behind the Orion Nebula. Using statistical methods to estimate the field strength in the region, we find that the explosion dominates the magnetic field near the center of the feature. Farther out, the magnetic field is close to energetic equilibrium with the ejecta and may be providing confinement to the explosion. The correlation between polarization fraction and the local polarization angle dispersion indicates that the depolarization as a function of unpolarized intensity is a result of intrinsic field geometry as opposed to decreases in grain alignment efficiency in denser regions.

AB - We report new polarimetric and photometric maps of the massive star-forming region OMC-1 using the HAWC+ instrument on the Stratospheric Observatory for Infrared Astronomy. We present continuum polarimetric and photometric measurements of this region at 53, 89, 154, and 214 μm at angular resolutions of 5″, 8″, 14″, and 19″ for the four bands, respectively. The photometric maps enable the computation of improved spectral energy distributions for the region. We find that at the longer wavelengths, the inferred magnetic field configuration matches the "hourglass" configuration seen in previous studies, indicating magnetically regulated star formation. The field morphology differs at the shorter wavelengths. The magnetic field inferred at these wavelengths traces the bipolar structure of the explosive Becklin-Neugebauer/Kleinman-Low outflow emerging from OMC-1 behind the Orion Nebula. Using statistical methods to estimate the field strength in the region, we find that the explosion dominates the magnetic field near the center of the feature. Farther out, the magnetic field is close to energetic equilibrium with the ejecta and may be providing confinement to the explosion. The correlation between polarization fraction and the local polarization angle dispersion indicates that the depolarization as a function of unpolarized intensity is a result of intrinsic field geometry as opposed to decreases in grain alignment efficiency in denser regions.

KW - ISM: clouds

KW - ISM: magnetic fields

KW - stars: formation

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UR - http://www.scopus.com/inward/citedby.url?scp=85063439056&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/aafd37

DO - 10.3847/1538-4357/aafd37

M3 - Article

AN - SCOPUS:85063439056

SN - 0004-637X

VL - 872

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 187

ER -

HAWC+/SOFIA Multiwavelength Polarimetric Observations of OMC-1

Abstract

Bibliographical note

Keywords

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