Abstract
We have mapped the 3 mm rotational transition of HCO+ toward S106 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 × 1017 cm, and its mass is ≤ 10 M⊙. The ring is expanding with a velocity of about 2 km s-1. The ring cannot be supported by rotation; magnetic fields and gas pressure may be important in determining the kinematics of the region. We also observe clumps of high-velocity material which may have been ablated from the ring and entrained in the ionized bipolar outflow.
Original language | English (US) |
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Pages (from-to) | L67-L69 |
Journal | Astrophysical Journal |
Volume | 362 |
Issue number | 2 PART 2 |
DOIs | |
State | Published - Oct 20 1990 |
Keywords
- Interstellar: matter
- Nebulae: individual (S106)
- Stars: formation
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science