A survey of formaldehyde in the Cepheus OB3 molecular cloud

Details A survey of formaldehyde in the Cepheus OB3 molecular cloud A survey of formaldehyde in the Cepheus OB3 molecular cloud

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.203..853f&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 203, May 1983, p. 853-859.

Astronomy and Astrophysics

Astronomy

6

Absorption Spectra, Astronomical Spectroscopy, Formaldehyde, Line Spectra, Molecular Clouds, Radio Astronomy, Abundance, Brightness Temperature, Carbon Dioxide, Centimeter Waves, Linear Polarization, Velocity Distribution

Scientific paper

The 1(11)-1(10) absorption line of formaldehyde at 6-cm wavelength has been surveyed over the region of the Cepheus QB3 molecular cloud, using the Jodrell Bank Mk II radio telescope (beamwidth 9 x 10 arcmin square). The measurements have a velocity resolution of 0.27 km/s and an rms noise level of about 0.01 K. The formaldehyde has a very clumpy distribution which is broadly similar to the CO distribution found by Sargent. A total molecular mass of 19,000 solar masses is implied by the formaldehyde measurements. Cepheus A is not the dominant concentration in the formaldehyde map. The most massive formaldehyde concentration is Cepheus C, which has a mass of 3600 solar masses. It appears to be stabilized by rotation.

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