CO(J=4-3) submillimeter map of M 17 SW

Details CO(J=4-3) submillimeter map of M 17 SW CO(J=4-3) submillimeter map of M 17 SW

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...171..297s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 171, no. 1-2, Jan. 1987, p. 297-304.

Astronomy and Astrophysics

Astrophysics

15

Astronomical Maps, Carbon Monoxide, Line Spectra, Molecular Clouds, Radio Spectra, Submillimeter Waves, Astronomical Spectroscopy, Charge Coupled Devices, Spectral Energy Distribution, Spectral Line Width

Scientific paper

The authors have obtained a map of twelve spectra in the centre of the molecular cloud M17 SW in the J = 4 - 3 submm transition of CO at 650 μm. The antenna temperature (≡40K) and the center velocity (≡20 km s-1) are fairly constant over the observed region. The spectra have gaussian cores and strong blue wings near the ionization front, whereas around IRc 1 they are symmetric and flat-topped. IRc 1 itself has symmetric high velocity wings. The authors present a method for solving the radiative transfer in the microturbulent approximation; an attempt is made to explain the CO lines within this code. A CCD image of IRc 1 reveals a star-like center and a surrounding small elongated nebulosity.

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