Misalignment of magnetic fields and outflows in protostellar cores

Charles L.H. Hull; Richard L. Plambeck; Alberto D. Bolatto; Geoffrey C. Bower; John M. Carpenter; Richard M. Crutcher; Jason D. Fiege; Erica Franzmann; Nicholas S. Hakobian; Carl Heiles; Martin Houde; A. Meredith Hughes; Katherine Jameson; Woojin Kwon; James W. Lamb; Leslie W. Looney; Brenda C. Matthews; Lee Mundy; Thushara Pillai; Marc W. Pound; Ian W. Stephens; John J. Tobin; John E. Vaillancourt; N. H. Volgenau; Melvyn C.H. Wright

doi:10.1088/0004-637X/768/2/159

Misalignment of magnetic fields and outflows in protostellar cores

Charles L.H. Hull, Richard L. Plambeck, Alberto D. Bolatto, Geoffrey C. Bower, John M. Carpenter, Richard M. Crutcher, Jason D. Fiege, Erica Franzmann, Nicholas S. Hakobian, Carl Heiles, Martin Houde, A. Meredith Hughes, Katherine Jameson, Woojin Kwon, James W. Lamb, Leslie W. Looney, Brenda C. Matthews, Lee Mundy, Thushara Pillai, Marc W. PoundIan W. Stephens, John J. Tobin, John E. Vaillancourt, N. H. Volgenau, Melvyn C.H. Wright

Astronomy

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Abstract

We present results of λ1.3 mm dust-polarization observations toward 16 nearby, low-mass protostars, mapped with ∼2.″5 resolution at CARMA. The results show that magnetic fields in protostellar cores on scales of ∼1000 AU are not tightly aligned with outflows from the protostars. Rather, the data are consistent with scenarios where outflows and magnetic fields are preferentially misaligned (perpendicular), or where they are randomly aligned. If one assumes that outflows emerge along the rotation axes of circumstellar disks, and that the outflows have not disrupted the fields in the surrounding material, then our results imply that the disks are not aligned with the fields in the cores from which they formed.

Original language	English (US)
Article number	159
Journal	Astrophysical Journal
Volume	768
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/768/2/159
State	Published - May 10 2013

Keywords

SM: magnetic fields
magnetic fields
polarization
stars: formation
stars: magnetic field
stars: protostars

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/0004-637X/768/2/159

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Hull, C. L. H., Plambeck, R. L., Bolatto, A. D., Bower, G. C., Carpenter, J. M., Crutcher, R. M., Fiege, J. D., Franzmann, E., Hakobian, N. S., Heiles, C., Houde, M., Meredith Hughes, A., Jameson, K., Kwon, W., Lamb, J. W., Looney, L. W., Matthews, B. C., Mundy, L., Pillai, T., ... Wright, M. C. H. (2013). Misalignment of magnetic fields and outflows in protostellar cores. Astrophysical Journal, 768(2), Article 159. https://doi.org/10.1088/0004-637X/768/2/159

Hull, CLH, Plambeck, RL, Bolatto, AD, Bower, GC, Carpenter, JM, Crutcher, RM, Fiege, JD, Franzmann, E, Hakobian, NS, Heiles, C, Houde, M, Meredith Hughes, A, Jameson, K, Kwon, W, Lamb, JW, Looney, LW, Matthews, BC, Mundy, L, Pillai, T, Pound, MW, Stephens, IW, Tobin, JJ, Vaillancourt, JE, Volgenau, NH & Wright, MCH 2013, 'Misalignment of magnetic fields and outflows in protostellar cores', Astrophysical Journal, vol. 768, no. 2, 159. https://doi.org/10.1088/0004-637X/768/2/159

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title = "Misalignment of magnetic fields and outflows in protostellar cores",

abstract = "We present results of λ1.3 mm dust-polarization observations toward 16 nearby, low-mass protostars, mapped with ∼2.″5 resolution at CARMA. The results show that magnetic fields in protostellar cores on scales of ∼1000 AU are not tightly aligned with outflows from the protostars. Rather, the data are consistent with scenarios where outflows and magnetic fields are preferentially misaligned (perpendicular), or where they are randomly aligned. If one assumes that outflows emerge along the rotation axes of circumstellar disks, and that the outflows have not disrupted the fields in the surrounding material, then our results imply that the disks are not aligned with the fields in the cores from which they formed.",

keywords = "SM: magnetic fields, magnetic fields, polarization, stars: formation, stars: magnetic field, stars: protostars",

author = "Hull, {Charles L.H.} and Plambeck, {Richard L.} and Bolatto, {Alberto D.} and Bower, {Geoffrey C.} and Carpenter, {John M.} and Crutcher, {Richard M.} and Fiege, {Jason D.} and Erica Franzmann and Hakobian, {Nicholas S.} and Carl Heiles and Martin Houde and {Meredith Hughes}, A. and Katherine Jameson and Woojin Kwon and Lamb, {James W.} and Looney, {Leslie W.} and Matthews, {Brenda C.} and Lee Mundy and Thushara Pillai and Pound, {Marc W.} and Stephens, {Ian W.} and Tobin, {John J.} and Vaillancourt, {John E.} and Volgenau, {N. H.} and Wright, {Melvyn C.H.}",

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T1 - Misalignment of magnetic fields and outflows in protostellar cores

AU - Hull, Charles L.H.

AU - Plambeck, Richard L.

AU - Bolatto, Alberto D.

AU - Bower, Geoffrey C.

AU - Carpenter, John M.

AU - Crutcher, Richard M.

AU - Fiege, Jason D.

AU - Franzmann, Erica

AU - Hakobian, Nicholas S.

AU - Heiles, Carl

AU - Houde, Martin

AU - Meredith Hughes, A.

AU - Jameson, Katherine

AU - Kwon, Woojin

AU - Lamb, James W.

AU - Looney, Leslie W.

AU - Matthews, Brenda C.

AU - Mundy, Lee

AU - Pillai, Thushara

AU - Pound, Marc W.

AU - Stephens, Ian W.

AU - Tobin, John J.

AU - Vaillancourt, John E.

AU - Volgenau, N. H.

AU - Wright, Melvyn C.H.

PY - 2013/5/10

Y1 - 2013/5/10

N2 - We present results of λ1.3 mm dust-polarization observations toward 16 nearby, low-mass protostars, mapped with ∼2.″5 resolution at CARMA. The results show that magnetic fields in protostellar cores on scales of ∼1000 AU are not tightly aligned with outflows from the protostars. Rather, the data are consistent with scenarios where outflows and magnetic fields are preferentially misaligned (perpendicular), or where they are randomly aligned. If one assumes that outflows emerge along the rotation axes of circumstellar disks, and that the outflows have not disrupted the fields in the surrounding material, then our results imply that the disks are not aligned with the fields in the cores from which they formed.

AB - We present results of λ1.3 mm dust-polarization observations toward 16 nearby, low-mass protostars, mapped with ∼2.″5 resolution at CARMA. The results show that magnetic fields in protostellar cores on scales of ∼1000 AU are not tightly aligned with outflows from the protostars. Rather, the data are consistent with scenarios where outflows and magnetic fields are preferentially misaligned (perpendicular), or where they are randomly aligned. If one assumes that outflows emerge along the rotation axes of circumstellar disks, and that the outflows have not disrupted the fields in the surrounding material, then our results imply that the disks are not aligned with the fields in the cores from which they formed.

KW - SM: magnetic fields

KW - magnetic fields

KW - polarization

KW - stars: formation

KW - stars: magnetic field

KW - stars: protostars

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JF - Astrophysical Journal

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ER -

Misalignment of magnetic fields and outflows in protostellar cores

Abstract

Keywords

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