Observations of an expanding molecular ring in S106

Details Observations of an expanding molecular ring in S106 Observations of an expanding molecular ring in S106

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...362l..67l&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 362, Oct. 20, 1990, p. L67-L69.

Astronomy and Astrophysics

Astrophysics

14

Formyl Ions, H Ii Regions, Interstellar Matter, Molecular Gases, Star Formation, Astronomical Maps, Molecular Flow, Velocity Distribution

Scientific paper

The 3 mm rotational transition of HCO(+) toward S106 has been mapped with the Berkeley-Illinois-Maryland Array and the NRAO 12 m telescope. The maps show evidence for an expanding molecular ring around IRS 4, the exciting star in S106. The radius of the ring is about 2 x 10 to the 17th cm, and its mass is 10 solar masses or less. The ring is expanding with a velocity of about 2 km/s. The ring cannot be supported by rotation; magnetic fields and gas pressure may be important in determining the kinematics of the region. Clumps of high-velocity material are observed which may have been ablated from the ring and entrained in the ionized bipolar outflow.

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