Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.192..377c&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 192, Aug. 1980, p. 377-388.
Astronomy and Astrophysics
Astronomy
6
Galactic Structure, Radio Astronomy, Radio Sources (Astronomy), Radio Spectra, Astronomical Maps, Astronomical Photography, Continuous Radiation, H Ii Regions, Interstellar Extinction, Light Emission, Radiant Flux Density, Stellar Magnitude, Stellar Models, Stellar Radiation
Scientific paper
Observations of the galactic H II region DR15 have been made at frequencies of 408 and 1407 MHz with the Cambridge One-Mile telescope. Adjacent to the main source DR15, several previously unknown weak radio sources were found, some of them being correlated with optical emission present on the PSS E print. The source has also been observed at 2695 MHz using the Cambridge 5-km telescope with a resolution of 3.7 x 5.7 arcsec. The brightest source shows considerable internal detail, comprising ionization ridges and individual H II regions. One radio source, component B, is probably excited by two stars visible on the PSS prints and of spectral type O9.5 - B0. This source appears to be well described by the Blister model and has an estimated extinction in the visual of 6.4 mag.
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