High resolution observations of extended radio sources near L = 94 degrees

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Spectroscopy, High Resolution, Linear Polarization, Radio Sources (Astronomy), Supernova Remnants, Astronomical Maps, Continuous Spectra, Extragalactic Radio Sources, H Ii Regions, Nebulae

Scientific paper

Radio continuum observations of a low galactic latitude region near l = 94° are presented at 608.5 MHz and 4.75 GHz. At 4.75 GHz both total power and linear polarization measurements were made. The non-thermal source 3C434.1 is shown to be a shell-type SNR with a non-uniform distribution of emission. The nearby source NRAO 655 has a flat spectrum above 600 MHz and is unpolarized. A thermal nature seems more likely, although it cannot yet be ruled out that the source is an unusually flat spectrum SNR. Three other probable thermal sources are identified, two of which are candidate compact H II regions. Linear polarization has been detected from the extended extragalactic source 4C50.55.

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