Journal article
A radio nebula surrounding the ultraluminous x-ray source in NGC 5408
The Astrophysical journal, Vol.666(1), pp.79-85
09/01/2007
DOI: 10.1086/519553
Abstract
New radio observations of the counterpart of the ultraluminous X-ray source in NGC 5408 show for the first time that the radio emission is resolved with an angular size of 1.5"-2,0". This corresponds to a physical size of 35-46 pc, and rules out interpretation of the radio emission as beamed emission from a relativistic jet. In addition, the radio spectral index of the counterpart is well determined from three frequencies and found to be α = -0.8 ±0.2. The radio emission is likely to be optically thin synchrotron emission from a nebula surrounding the X-ray source. The radio luminosity of the counterpart is 3.8 × 1034 erg s-1 and the minimum energy required to power the nebula is ∼ 1 × 1049 erg. These values are 2 orders of magnitude larger than in any Galactic nebula powered by an accreting compact object. © 2007. The American Astronomical Society. All rights reserved.
Details
- Title: Subtitle
- A radio nebula surrounding the ultraluminous x-ray source in NGC 5408
- Creators
- Cornelia C Lang - University of IowaPhilip Kaaret - University of IowaStéphane Corbel - CEA Paris-SaclayAllison Mercer - University of Iowa
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.666(1), pp.79-85
- DOI
- 10.1086/519553
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Publisher
- University of Chicago Press
- Language
- English
- Date published
- 09/01/2007
- Academic Unit
- Liberal Arts and Science Admin; Physics and Astronomy
- Record Identifier
- 9984429048902771
Metrics
11 Record Views