Properties of molecular clouds containing Herbig-Haro objects

Details Properties of molecular clouds containing Herbig-Haro objects Properties of molecular clouds containing Herbig-Haro objects

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...234..932l&link_type=abstract

Astrophysical Journal, Part 1, vol. 234, Dec. 15, 1979, p. 932-948.

Astronomy and Astrophysics

Astrophysics

94

Herbig-Haro Objects, Interstellar Gas, Main Sequence Stars, Nebulae, Stellar Evolution, Cores, Emission Spectra, Formaldehyde, Infrared Spectra, Stellar Luminosity

Scientific paper

In the present paper, the physical conditions in the molecular clouds associated with a large number of Herbig-Haro and related objects are investigated. H2CO emission at 2 mm was detected in the direction of 15 out of 30 objects observed. From a H2CO analysis, it is found that the molecular clouds associated with Herbig-Haro objects have the following properties: the dense core of a cloud is more likely to coincide with nearby embedded infrared sources than with the surrounding Herbig-Haro objects. Densities of the clouds surrounding some Herbig-Haro sources are low, or the core regions are very small, in order to account for the nondetections. Core masses range from 18 to 1200 solar masses, while density and temperature are not well correlated.

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