High-resolution mapping of the bipolar outflow in NGC 2071 - Evidence for a wind-driven molecular outflow

Journal Article · Wed Oct 31 23:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169328· OSTI ID:6315649

Kitamura, Yoshimi; Kawabe, Ryohei; Yamashita, Takuya; Hayashi, Masahiko ^[1]

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1. Nobeyama Radio Observatory, Minamimaki (Japan) Tokyo Univ. (Japan)

The bipolar outflow in NGC 2071 has been mapped in the CS (J = 2-1), CS (J = 1-0), HCO(+) (J = 1-0), and HCN (J = 1-0) lines, using the 45-m telescope of Nobeyama Radio Observatory with the narrow beams of HPBW = 20 arcsec and 40 arcsec. It is found that the rest components of the CS (J = 2-1) and CS (J = 1-0) lines have cavities at the centers of the red and blue lobes of the CO high-velocity emission, and that a single peak of the CS spectra outside the CO red lobe splits into two peaks inside the lobe. These features of the CS emission strongly suggest that the bipolar outflow in NGC 2071 consists of two expanding dense bubbles which are driven by a stellar wind from the IR cluster. The high-resolution mapping also reveals the fact that the CS bubbles have a clumpy structure. Two of the clumps are located at the place where the shocked H2 emission was detected. This fact indicates that formation of the strong shock results from the collision between the high-velocity wind from the IR cluster and the clumps in the ambient cloud. In addition, around the IR cluster this observation shows a disklike condensation, whose size is smaller than the width of the CO high-velocity outflow. 35 refs.

• OSTI ID: 6315649
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 363; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASTRONOMY
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBON SULFIDES
CHALCOGENIDES
FLUID FLOW
GAS FLOW
INTERSTELLAR SPACE
MAPS
MASS TRANSFER
NEBULAE
OXIDES
OXYGEN COMPOUNDS
PROTOSTARS
RADIOASTRONOMY
SPACE
SPECTRA
STELLAR ACTIVITY
STELLAR WINDS
SULFIDES
SULFUR COMPOUNDS