A survey of formaldehyde in the Orion dust cloud L1641

Details A survey of formaldehyde in the Orion dust cloud L1641 A survey of formaldehyde in the Orion dust cloud L1641

Jul 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.188..181f&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 188, July 1979, p. 181-190.

Astronomy and Astrophysics

Astronomy

13

Absorption Spectra, Cosmic Dust, Formaldehyde, Hydrogen Clouds, Line Spectra, Molecular Gases, Orion Nebula, Astronomical Maps, Carbon Monoxide, Condensation, Dynamic Stability, Gas Density, Hydroxyl Emission, Interstellar Extinction, Microwave Spectra

Scientific paper

Results are presented for an extensive survey of the 6-cm formaldehyde absorption in the northern cloud L1641. The results indicate two main condensations of molecules having masses of about 1 and 2 times 10 to the 4th solar masses. They are probably collapsing. A comparison with a CO survey of the same region shows poor detailed agreement, although the HCHO column density would appear to be related to the extinction. Better extinction measurements are planned in order to investigate this relationship, since it may be that formaldehyde is a better tracer of molecular hydrogen density than CO.

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