Observations of the Rosette Nebula NGC 2237 at decametric wavelengths

Details Observations of the Rosette Nebula NGC 2237 at decametric wavelengths Observations of the Rosette Nebula NGC 2237 at decametric wavelengths

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ap%26ss..54..187k&link_type=abstract

Astrophysics and Space Science, vol. 54, no. 1, Mar. 1978, p. 187-197.

Astronomy and Astrophysics

Astronomy

11

Brightness Temperature, Decametric Waves, Hydrogen Clouds, Nebulae, Radio Astronomy, Radio Emission, Hydrogen Ions, Radio Telescopes, Thermal Emission

Scientific paper

Radio telescope observations at frequencies of 12.6, 14.7, 16.7, 20.0 and 25.0 MHz provide information on the area of ionized hydrogen of the Rosette Nebula. Radio brightness-temperature contours of the nebula are presented for the various frequencies. The observations indicate that the electron temperature of NGC 2237 is 3600 K, which confirms previous findings that the nebula is one of the coldest areas of H II. An optical depth of about 10 at 25 MHz, an electron density of eight per cu cm, and a mass of 16,600 solar masses are among the other characteristics assigned to the nebula.

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