SMA observations of the magnetic fields around a low-mass protostellar system

J. M. Girart, R. Rao, Daniel P Marrone

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Observations of the submillimeter polarized dust emission is an important tool to study the role of the magnetic fields in the evolutions of molecular clouds and in the star formation processes. The Submillimeter Array (SMA) is the first imaging submillimeter interferometer. The installation of quarter wave plates in front of the 345 GHz receivers has allowed to carry out polarimetric observations. We present high angular resolution 345 GHz SMA observations of polarized dust emission towards the low-mass protostellar system NGC 1333 IRAS 4A. We show that in this system the observed magnetic field morphology is in agreement with the standard theoretical models of formation of low-mass stars in magnetized molecular clouds at scales of a few hundred AU; gravity has overcome magnetic support and the magnetic field traces a clear hourglass shape. The magnetic field is substantially more important than turbulence in the evolution of the system and the initial misalignment of the magnetic and spin axes may have been important in the formation of the binary system.

Original languageEnglish (US)
Pages (from-to)87-90
Number of pages4
JournalAstrophysics and Space Science
Volume313
Issue number1-3
DOIs
StatePublished - Jan 2008
Externally publishedYes

Fingerprint

magnetic field
molecular clouds
magnetic fields
dust
Infrared Astronomy Satellite
angular resolution
interferometer
misalignment
installing
star formation
interferometers
receivers
turbulence
gravity
gravitation
stars
high resolution

Keywords

  • ISM: clouds
  • ISM: magnetic fields
  • ISM: polarization
  • Stars: formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

SMA observations of the magnetic fields around a low-mass protostellar system. / Girart, J. M.; Rao, R.; Marrone, Daniel P.

In: Astrophysics and Space Science, Vol. 313, No. 1-3, 01.2008, p. 87-90.

Research output: Contribution to journalArticle

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