Detection of synchrotron emission from a unique HH-like object in Orion

F. Yusef-Zadeh*, T. J. Cornwell, Bo Reipurth, M. Roth

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

VLA observations of an HH-like object, known as the Orion "streamers" in the L1641 cloud, have been carried out at λ2, 6, and 20 cm. This object is located several arcminutes to the north of HH 34 and exhibits a unique morphology which consists of a long and narrow structure with approximate dimensions of 10″ × 300″ in optical photographs. We have detected a significant linearly polarized emission at λ6 cm arising from near the core of the streamers, indicating uniform magnetic field geometry. This result suggests that the source responsible for producing the nebulosity is a nonthermal-emitting radio source. Because of the presence of a number of newly born low-mass stars in the vicinity of the streamers and because of the detection of a faint highly reddened 2 μm source coincident with the polarized radio emission, we believe that the source at the core of the streamers is a low-luminosity young star responsible for both the synchrotron emission and the shock nebulosity. The large-scale linearly polarized stellar emission implies that the magnetic field is highly ordered surrounding the star and that a rotating magnetosphere may be responsible for global acceleration of particles as a result of the reconnection of the field lines in the outer magnetosphere along the equatorial region.

Original languageEnglish (US)
Pages (from-to)L61-L64
JournalAstrophysical Journal
Volume348
Issue number2 PART 2
DOIs
StatePublished - Jan 10 1990

Keywords

  • Infrared: sources
  • Magnetic fields
  • Radiation mechanisms

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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