High-resolution radio maps of three H II regions in the Perseus arm

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Maps, Galactic Structure, H Ii Regions, High Resolution, Milky Way Galaxy, Radio Astronomy, Flux Density, Interstellar Matter, Planetary Nebulae, Radiation Pressure, Radio Emission, Stellar Luminosity

Scientific paper

The Cambridge 5-km telescope has been used to make high-resolution radio maps of Sh 156 (IC 1470) and Sh 159 at 5 and 15 GHz, and Sh 157 at 5 GHz. Bright compact regions are found inside the optical nebulae, asymmetrically placed about the exciting stars. Radiation pressure from these star dominates the dynamics of the nebulae and may produce the radio-emission minima near their centers.

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