The tidal disruption of a star by a massive black hole
Nov, 19894 pages
Published in:
- Astrophys.J.Lett. 346 (1989) L13-L16
DOI:
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Abstract: (ADS)
Observations of the S140 molecular cloud have been obtained with the VLA at 6 and 2 cm and with the KPNO infrared camera at 1.2, 1.65, and 2.2 microns. Radio continuum emission is seen from all three mid-infrared sources, IRS 1, 2, and 3. The near-infrared images show IRS 1 and 3 very clearly, but IRS 2 is not detected. Two additional radio sources not associated with mid-infrared sources, but coincident with strong, scattered, near-infrared emission, are probably clumps of shock-ionized gas, whose associated dust is illuminated by photons escaping through holes in the dense material around IRS 1. The near-infrared emission from IRS 1 and 3 is too strong to come from the stellar photospheres; instead it must be emission from hot dust grains. The absence of IRS 2 from the near-infrared images implies that the extinction toward IRS 2 must be much larger than the average. A substantial number of weaker sources are seen at 2 microns in the vicinity of IRS 1, indicating that many lower mass stars are also forming in the region.References(0)
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