Interferometric observations of 1.4 millimeter continuum sources

Details Interferometric observations of 1.4 millimeter continuum sources Interferometric observations of 1.4 millimeter continuum sources

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...337l..41w&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 337, Feb. 1, 1989, p. L41-L44.

Astronomy and Astrophysics

Astronomy

116

Continuous Radiation, Interferometry, Interstellar Matter, Millimeter Waves, Radio Sources (Astronomy), Carbon, Cosmic Dust, Emission Spectra, Mass Distribution, Star Formation

Scientific paper

A set of 1.4-mm continuum measurements for a sample of 15 Galactic and extragalactic sources obtained with a millimeter-wave interferometer are presented. Maps at 3 arcsec resolution reveal compact dust emission regions in L1551 IRS 5, HH 7-11, NGC 7538 IRS 1, DR 21(OH) and Arp 220. In Arp 220 about 50 percent of the total 1.4-mm flux originates from a compact source less than 650 pc in radius centered on the NIR nucleus. The mass of interstellar matter in the central source of Arp 220 is approximately 3 X 10 to the 9th solar masses. Comparison of the 1.4 and 2.7-mm dust emission in 10 Galactic sources indicates a spectra index of 3.0 + or - 0.2 for the frequency dependence of the observed small-scale flux.

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