Journal article
BROAD COMPONENTS IN OPTICAL EMISSION LINES FROM THE ULTRA-LUMINOUS X-RAY SOURCE NGC 5408 X-1
Astrophysical journal. Letters, Vol.728(1), L5
02/10/2011
DOI: 10.1088/2041-8205/728/1/L5
Abstract
High-resolution optical spectra of the ultra-luminous X-ray source (ULX) NGC 5408 X-1 show a broad component with a width of {approx}750 km s{sup -1} in the He II and H{beta} lines in addition to the narrow component observed in these lines and [O III]. Reanalysis of moderate-resolution spectra shows a similar broad component in the He II line. The broad component likely originates in the ULX system itself, probably in the accretion disk. The central wavelength of the broad He II line is shifted by 252 {+-} 47 km s{sup -1} between the two observations. If this shift represents motion of the compact object, then its mass is less than {approx}1800 M{sub sun}.
Details
- Title: Subtitle
- BROAD COMPONENTS IN OPTICAL EMISSION LINES FROM THE ULTRA-LUMINOUS X-RAY SOURCE NGC 5408 X-1
- Creators
- D Cseh - Université Paris DiderotS Corbel - Université Paris DiderotF Grise - University of IowaP Kaaret - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Astrophysical journal. Letters, Vol.728(1), L5
- DOI
- 10.1088/2041-8205/728/1/L5
- ISSN
- 2041-8205
- eISSN
- 2041-8213
- Publisher
- The American Astronomical Society
- Language
- English
- Date published
- 02/10/2011
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199803202771
Metrics
22 Record Views