Interferometric observations of M42 at 1.3 CM

Details Interferometric observations of M42 at 1.3 CM Interferometric observations of M42 at 1.3 CM

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97..458o&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 97, Feb. 1989, p. 458-461.

Astronomy and Astrophysics

Astronomy

4

Interferometry, Orion Nebula, Radio Sources (Astronomy), Continuous Radiation, Ionized Gases, Molecular Gases

Scientific paper

New interferometric observations of the central 4.5 deg of M42 have been made at 1.3 cm with the NRO Millimeter-Wave Array. Distribution of the radio source consists of two known components. One is centered on the Trapezium stars, and the other corresponds to the bright bar. The present map is compared with the distribution of the CS molecular gas (Hayashi et al., 1989), and it is found that the boundary of the ionized gas is well delineated by the CS ridge. This indicates that the ionized gas is distributed in a cavity of the molecular gas, as suggested by Sugitani et al. (1986). A comparison of the map with a 6-cm radio-continuum map (Johnston et al., 1983) indicates that the 6 cm distribution is more extended than the 1.3 cm distribution, except in the southern part of the bright bar.

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