G 35.2 - 0.74 - A molecular cloud with bipolar and monopolar outflow?

Details G 35.2 - 0.74 - A molecular cloud with bipolar and monopolar outflow? G 35.2 - 0.74 - A molecular cloud with bipolar and monopolar outflow?

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...136..282m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 136, no. 2, July 1984, p. 282-288.

Astronomy and Astrophysics

Astrophysics

14

Astronomical Spectroscopy, Interstellar Gas, Interstellar Radiation, Molecular Clouds, Stellar Evolution, Formyl Ions, Line Spectra, Water Masers

Scientific paper

Observations are described of the J = 1-0 and J = 3-2 HCO(+) emission from the molecular cloud G 35.2 - 0.74. Near the northern water maser, three components are evident in the spectra: low velocity (about 3 km/s) intermediate velocity material (about 10 km/s) and high velocity outflow, which is spatially asymmetric, having a total velocity extent greater than 40 km/s. Splitting of the HCO(+) lines near the southern nebulosity is similar to that observed in all other molecular transitions to date. Evidence is also presented for the existence of regions in both sources having molecular hydrogen densities of 10 to the 5th - 10 to the 6th per cu cm. It is suggested that in the northern source, outflow from a central object embedded in a flattened distribution of ambient material is channelled in directions of largest density gradient, leading to bipolarity. In the southern source, the ambient cloud possesses greater spherical symmetry and prevents a similar outflow from escaping, leading instead to line splitting.

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