Rotating gas disk around L1551 IRS-5

Details Rotating gas disk around L1551 IRS-5 Rotating gas disk around L1551 IRS-5

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...134....7k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 134, no. 1, May 1984, p. 7-12.

Astronomy and Astrophysics

Astrophysics

165

Interstellar Matter, Molecular Clouds, Protostars, Rotating Disks, Stellar Evolution, Astronomical Models, Magnetic Fields, Planetary Systems, Pre-Main Sequence Stars, Protoplanets

Scientific paper

A rotating molecular disk was found around IRS-5 in L1551 by CS (J = 1-0) observations with a 33arcsec beam. The plane of the disk is perpendicular to the extension of the compact ionized region which is nearly in the direction of the high-velocity flow. Estimated size, mass and rotation velocity of the disk are about 0.1 pc, 2 M_sun;, and 0.35 km s-1, respectively. Though the apparent disk shape is torus-like, some evidences suggest that the disk continues to its very central region. The authors discuss the characteristics of the disk, the collimation mechanism of high-velocity flow, and the possible formation of a planetary system in the central region of the disk. A scenario of disk formation in the L1551 dark cloud under the influence of a magnetic field is proposed.

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