Abstract
Helfand and Becker1 recently discussed the unusual filamentary appearance of the galactic radio sources G357.7–0.1 and G5.3–1.0, both of which had originally been classified as supernova remnants (SNRs)2,3, and proposed that these sources belong to a new class of non-thermal radio sources that originate in accreting binary systems containing a neutron star or a black hole. Becker and Helfand4 have pointed out that other galactic sources may be identified as members of this class; we report here our claim that a new non-thermal galactic object (G18.95–1.1), detected in the recently published 2.695-GHz galactic plane survey5, is a possible candidate. That the integrated flux density spectral index α = −0.4 (Sν ˜ να) and the polarization is ≍ 2.5% at 4.75 GHz, proves the non-thermal nature of the new source; morphologically, a classification of this object as a SNR seems impossible. G18.95–1.1 consists of various arcs all pointing towards a central radio peak; we suggest that the object is a binary system containing a compact component, located at or close to this radio peak, accelerating electrons to relativistic energies—observed in the arcs by the synchrotron emission of the accelerating electrons.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Helfand, D. J. & Becker, R. H. Nature 313, 118–119 (1985).
Milne, D. E. Aust. J. Phys. 32, 83–92 (1979).
Green, D. A. Mon. Not. R. astr. Soc. 209, 449–478 (1984).
Becker, R. H. & Helfand, D. J. Nature 313, 115–118 (1985).
Reich, W., Fürst, E., Steffen, P., Reif, K. fl, Haslam, C. G. T. Astr. Astrophys. Suppl. 58, 197–248 (1984).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Fürst, E., Reich, W., Reich, P. et al. A new non-thermal galactic radio source with a possible binary system. Nature 314, 720–721 (1985). https://doi.org/10.1038/314720a0
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1038/314720a0
This article is cited by
-
Is the G18.95–1.1 radio source a shell-type supernova remnant with a central object?
Nature (1988)
-
A revised reference catalogue of galactic supernova remnants
Astrophysics and Space Science (1988)
-
A wide low-mass binary model for the origin of axially symmetric non-thermal radio sources
Nature (1985)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.