The Cygnus X region: XXIII. Is 18P87 galactic or extragalactic?
✍ Scribed by O.P. Behre; H.J. Wendker; L.A. Higgs; T.L. Landecker
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 186 KB
- Volume
- 331
- Category
- Article
- ISSN
- 0004-6337
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✦ Synopsis
Abstract
The radio source 18P87, previously thought to be a point source, has been serendipitously found to be resolved into a core‐jet geometry in VLA maps. H I absorption of continuum emission (in data from the Canadian Galactic Plane Survey) appears in gas with radial velocities >+2 km/s but not in brightly emitting gas at lower radial velocity. Examination of further archival observations at radio, infrared and optical wavelengths suggests that the “obvious” interpretation as a radio galaxy requires a rather unusual object of this kind and a highly unusual local line of sight. We argue that 18P87 may be a Galactic object, a local astrophysical jet. If this is correct it could have arisen from outbursts of a microquasar (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)