Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...359..125m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 359, Aug. 10, 1990, p. 125-130.
Astronomy and Astrophysics
Astrophysics
21
Ammonia, Herbig-Haro Objects, Molecular Clouds, Orion Nebula, Pre-Main Sequence Stars, Rotational Spectra, Astronomical Maps, Hydrogen, Stellar Winds, Synthetic Apertures
Scientific paper
Aperture synthesis observations of the Orion molecular cloud 1 (OMC-1) have been made in NH3 (1, 1) and (2, 2) emission at 23.7 GHz, using the Nobeyama Millimeter Array (NMA), and obtained 16 arcsec resolution maps for OMC-1 and 8 arcsec resolution maps for the Orion-KL region. Filamentary structures extending over 0.5 pc from the Orion-KL region to the north and northwest directions were found. These structures are associated with the H2 finger structures and Herbig-Haro objects which are located at the blue-shifted side of the bipolar molecular outflow. The results suggest that these filaments are ambient molecular cloudlets with shocked surfaces caused by the strong stellar wind from the Orion-KL region. The 8 arcsec resolution NH3 (2, 2) maps show the extended features around the hot core of Orion-KL. These extended features correspond to the rotating disk and shocked shell associated with the bipolar molecular outflow.
Hasegawa Tetsuo
Ishiguro Masato
Kasuga Takashi
Kawabe Ryohei
Morita Koh-Ichiro
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