The Cygnus X region XXIII. Is 18P87 galactic or extragalactic?
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. HI 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.
Cite
@article{arxiv.1004.2473,
title = {The Cygnus X region XXIII. Is 18P87 galactic or extragalactic?},
author = {Otto P. Behre and Heinrich J. Wendker and Lloyd A. Higgs and Thomas L. Landecker},
journal= {arXiv preprint arXiv:1004.2473},
year = {2015}
}
Comments
Accepted for publication in Astronomische Nachrichten