Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.2503m&link_type=abstract
American Astronomical Society, 187th AAS Meeting, #25.03; Bulletin of the American Astronomical Society, Vol. 27, p.1322
Astronomy and Astrophysics
Astronomy
Scientific paper
The shocked molecular hydrogen observed at infrared wavelengths in the neighborhood of the BN-KL object in Orion has long been thought to be distributed in a thin layer. More recently, long fingers of shocked gas with clear bowshocks at the tips have been observed extending from the region of strongest emission. These fingers have been explained by Stone et al. (Nature, 1995, 377, 315) by invoking a stellar wind bubble fragmenting due to Rayleigh-Taylor instabilities caused by a sudden increase in its driving pressure, although such a bubble had not yet been observed. We used the MAGIC infrared camera/spectrometer on the Calar Alto 2.2m telescope to obtain a series of long-slit spectra covering the region, from which an accurately continuum-subtracted image in the 2.122-mu m line of shocked H_2 could be constructed. This image directly shows the fragmented stellar wind bubble invoked by Stone et al. We estimate the properties of the bubble based on this image and published observations of the velocity structure of the region.
Mac Low Mordecai-Mar
McCaughrean Mark J.
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