A sharper view of the outer Galaxy at 1420 and 408 MHz from the Canadian Galactic Plane Survey - I. Revisiting the KR catalogue and new Gigahertz Peaked Spectrum Sources

Abstract

Arcminute-resolution radio continuum images at 408 and 1420 MHz from the Canadian Galactic Plane Survey (CGPS) have been used to reexamine radio sources listed in the Kallas and Reich (1980) catalogue. This catalogue is of particular interest to Galactic studies as it lists both extended and compact radio sources found in the second Galactic quadrant. We have determined the nature (extended vs. compact, Galactic vs. extragalactic) of all of these bright radio sources. A number of large HII regions with no optical counterparts are highlighted along with a sample of large radio galaxies. Many sources previously thought to be extended Galactic objects are shown to be point sources. A sample of point sources with flat or rising spectra between 408 and 1420 MHz has been compiled, and within this sample likely Gigahertz Peaked Spectrum sources have been identified.

arXiv comment10 pages, 9 figures

References in corpus (7)

• The Synthesis Telescope at the Dominion Radio Astrophysical Observatory
• The High Resolution IRAS Galaxy Atlas
• Unveiling the nature of three INTEGRAL sources through optical spectroscopy
• Gigahertz Peaked Spectrum sources from the Jodrell Bank-VLA Astrometric Survey
• A Mid-Infrared Galaxy Atlas (MIGA)
• A method for determining radio continuum spectra, and its application to large surveys
• WN1626+5153: A Giant Radio Galaxy from the WENSS survey

Cited by in corpus (3)

• A sharper view of the outer Galaxy at 1420 and 408 MHz from the Canadian Galactic Plane Survey II: The catalogue of extended radio sources
• Diffuse radio emission in MACS J0025.4$-$1222: the effect of a major merger on bulk separation of ICM components
• Submillimeter and molecular views of three Galactic ring-like HII regions