Other
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...388..489g&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 388, April 1, 1992, p. 489-494.
Other
30
H Ii Regions, Interstellar Matter, Star Formation, Stellar Winds, Ammonia, Imaging Techniques, Radiant Flux Density, Spatial Resolution, Stellar Mass Ejection
Scientific paper
The NGC 2024 star-forming region has been imaged in the (J, K) = (1, 1) and (2, 2) inversion lines of NH3 and the radio continuum at a wavelength of 1.3 cm with a spatial resolution of 3 arcsec. The continuum image shows one pointlike and two extended features found in previous, lower resolution studies. The unresolved source (in a 2.4-arcsec beam) has a 1.3-cm flux density of 19 mJy and coincides with the position of IRS 2. Using the 6 cm data of Snell and Bally (1984), this source has a spectral index 1.2 +/- 0.2. The radio continuum emission is likely due to an ionized stellar wind. The mass-loss rate is about 3.6 x 10 exp -7 solar mass/yr. The southern extended ionized feature coincides with the sharp southern boundary of the H II region: an interface where the H II region is expanding into the northern edge of a group of high density molecular regions. The central part of the extended northern region (NCP) is at the southeast boundary of another group of molecular regions.
Gaume Ralph A.
Johnston Ken J.
Wilson Thomas L.
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