THE MAGNETIC FIELD MORPHOLOGY OF THE CLASS 0 PROTOSTAR L1157-mm

Ian W. Stephens; Leslie W. Looney; Woojin Kwon; Charles L. H. Hull; Richard L. Plambeck; Richard M. Crutcher; Nicholas Chapman; Giles Novak; Jacqueline Davidson; John E. Vaillancourt; Hiroko Shinnaga; Tristan Matthews

doi:10.1088/2041-8205/769/1/L15

THE MAGNETIC FIELD MORPHOLOGY OF THE CLASS 0 PROTOSTAR L1157-mm

Ian W. Stephens^*, Leslie W. Looney, Woojin Kwon, Charles L. H. Hull, Richard L. Plambeck, Richard M. Crutcher, Nicholas Chapman, Giles Novak, Jacqueline Davidson, John E. Vaillancourt, Hiroko Shinnaga, Tristan Matthews

^*Corresponding author for this work

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Abstract

We present the first detection of polarization around the Class 0 low-mass protostar L1157-mm at two different wavelengths. We show polarimetric maps at large scales (10 '' resolution at 350 mu m) from the SHARC-II Polarimeter and at smaller scales (1.'' 2-4.'' 5 at 1.3 mm) from the Combined Array for Research in Millimeter-wave Astronomy (CARMA). The observations are consistent with each other and show inferred magnetic field lines aligned with the outflow. The CARMA observations suggest a full hourglass magnetic field morphology centered about the core; this is only the second well-defined hourglass detected around a low-mass protostar to date. We apply two different methods to CARMA polarimetric observations to estimate the plane-of-sky magnetic field magnitude, finding values of 1.4 and 3.4 mG.

Original language	English
Article number	15
Number of pages	6
Journal	Astrophysical Journal Letters
Volume	769
Issue number	1
DOIs	https://doi.org/10.1088/2041-8205/769/1/L15
Publication status	Published - 20-May-2013

Keywords

galaxies: star formation
magnetic fields
polarization
stars: protostars
350 MU-M
STAR-FORMATION
SUBMILLIMETER POLARIZATION
MOLECULAR CLOUDS
IRAS 4A
CORES
OUTFLOW
DUST
POLARIMETRY
ENVELOPE

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@article{8d435bfa22bf4431b830194d048df350,

title = "THE MAGNETIC FIELD MORPHOLOGY OF THE CLASS 0 PROTOSTAR L1157-mm",

abstract = "We present the first detection of polarization around the Class 0 low-mass protostar L1157-mm at two different wavelengths. We show polarimetric maps at large scales (10 '' resolution at 350 mu m) from the SHARC-II Polarimeter and at smaller scales (1.'' 2-4.'' 5 at 1.3 mm) from the Combined Array for Research in Millimeter-wave Astronomy (CARMA). The observations are consistent with each other and show inferred magnetic field lines aligned with the outflow. The CARMA observations suggest a full hourglass magnetic field morphology centered about the core; this is only the second well-defined hourglass detected around a low-mass protostar to date. We apply two different methods to CARMA polarimetric observations to estimate the plane-of-sky magnetic field magnitude, finding values of 1.4 and 3.4 mG.",

keywords = "galaxies: star formation, magnetic fields, polarization, stars: protostars, 350 MU-M, STAR-FORMATION, SUBMILLIMETER POLARIZATION, MOLECULAR CLOUDS, IRAS 4A, CORES, OUTFLOW, DUST, POLARIMETRY, ENVELOPE",

author = "Stephens, {Ian W.} and Looney, {Leslie W.} and Woojin Kwon and Hull, {Charles L. H.} and Plambeck, {Richard L.} and Crutcher, {Richard M.} and Nicholas Chapman and Giles Novak and Jacqueline Davidson and Vaillancourt, {John E.} and Hiroko Shinnaga and Tristan Matthews",

year = "2013",

month = may,

day = "20",

doi = "10.1088/2041-8205/769/1/L15",

language = "English",

volume = "769",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "IoP Publishing",

number = "1",

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TY - JOUR

T1 - THE MAGNETIC FIELD MORPHOLOGY OF THE CLASS 0 PROTOSTAR L1157-mm

AU - Stephens, Ian W.

AU - Looney, Leslie W.

AU - Kwon, Woojin

AU - Hull, Charles L. H.

AU - Plambeck, Richard L.

AU - Crutcher, Richard M.

AU - Chapman, Nicholas

AU - Novak, Giles

AU - Davidson, Jacqueline

AU - Vaillancourt, John E.

AU - Shinnaga, Hiroko

AU - Matthews, Tristan

PY - 2013/5/20

Y1 - 2013/5/20

N2 - We present the first detection of polarization around the Class 0 low-mass protostar L1157-mm at two different wavelengths. We show polarimetric maps at large scales (10 '' resolution at 350 mu m) from the SHARC-II Polarimeter and at smaller scales (1.'' 2-4.'' 5 at 1.3 mm) from the Combined Array for Research in Millimeter-wave Astronomy (CARMA). The observations are consistent with each other and show inferred magnetic field lines aligned with the outflow. The CARMA observations suggest a full hourglass magnetic field morphology centered about the core; this is only the second well-defined hourglass detected around a low-mass protostar to date. We apply two different methods to CARMA polarimetric observations to estimate the plane-of-sky magnetic field magnitude, finding values of 1.4 and 3.4 mG.

AB - We present the first detection of polarization around the Class 0 low-mass protostar L1157-mm at two different wavelengths. We show polarimetric maps at large scales (10 '' resolution at 350 mu m) from the SHARC-II Polarimeter and at smaller scales (1.'' 2-4.'' 5 at 1.3 mm) from the Combined Array for Research in Millimeter-wave Astronomy (CARMA). The observations are consistent with each other and show inferred magnetic field lines aligned with the outflow. The CARMA observations suggest a full hourglass magnetic field morphology centered about the core; this is only the second well-defined hourglass detected around a low-mass protostar to date. We apply two different methods to CARMA polarimetric observations to estimate the plane-of-sky magnetic field magnitude, finding values of 1.4 and 3.4 mG.

KW - galaxies: star formation

KW - magnetic fields

KW - polarization

KW - stars: protostars

KW - 350 MU-M

KW - STAR-FORMATION

KW - SUBMILLIMETER POLARIZATION

KW - MOLECULAR CLOUDS

KW - IRAS 4A

KW - CORES

KW - OUTFLOW

KW - DUST

KW - POLARIMETRY

KW - ENVELOPE

U2 - 10.1088/2041-8205/769/1/L15

DO - 10.1088/2041-8205/769/1/L15

M3 - Article

SN - 2041-8205

VL - 769

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - 15

ER -

THE MAGNETIC FIELD MORPHOLOGY OF THE CLASS 0 PROTOSTAR L1157-mm

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