1. THE MAGNETIC FIELD MORPHOLOGY OF THE CLASS 0 PROTOSTAR L1157-mm
- Author
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Richard M. Crutcher, Giles Novak, Nicholas Chapman, Leslie W. Looney, Jacqueline A. Davidson, Tristan G. Matthews, Ian W. Stephens, Hiroko Shinnaga, John E. Vaillancourt, Charles L. H. Hull, Richard L. Plambeck, and Woojin Kwon
- Subjects
010504 meteorology & atmospheric sciences ,350 MU-M ,Polarimetry ,FOS: Physical sciences ,DUST ,Astrophysics ,magnetic fields ,POLARIMETRY ,01 natural sciences ,law.invention ,STAR-FORMATION ,law ,0103 physical sciences ,Protostar ,OUTFLOW ,010303 astronomy & astrophysics ,Solar and Stellar Astrophysics (astro-ph.SR) ,0105 earth and related environmental sciences ,Physics ,ENVELOPE ,polarization ,SUBMILLIMETER POLARIZATION ,stars: protostars ,CORES ,Astronomy and Astrophysics ,Polarimeter ,IRAS 4A ,Polarization (waves) ,Magnetic field ,Wavelength ,Astrophysics - Solar and Stellar Astrophysics ,Space and Planetary Science ,galaxies: star formation ,MOLECULAR CLOUDS ,Outflow ,Hourglass - 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.
- Published
- 2013