Mass-loss rate estimation for the massive binary 4U 1538-52/QV Nor
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Title: | Mass-loss rate estimation for the massive binary 4U 1538-52/QV Nor |
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Authors: | Rodes Roca, José Joaquín | Torrejon, Jose M. | Bernabeu, Guillermo |
Research Group/s: | Astronomía y Astrofísica |
Center, Department or Service: | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías |
Keywords: | X-ray binaries | 4U 1538-52 | Mass-loss |
Knowledge Area: | Física Aplicada | Astronomía y Astrofísica |
Issue Date: | Jul-2008 |
Series/Report no.: | 2008xru..confE..56R |
Abstract: | We present an analysis of archival RXTE data of the X- ray binary source 4U 1538−52/QV Nor. The RXTE ob- servatory made one complete binary cycle observation on January 1997 and 2001, respectively. The X-ray con- tinuum data are well described by an absorbed Nega- tive Positive power laws Exponentials (NPEX) compo- nent modified by an iron emission line at 6.4 keV and a cyclotron absorption line at 20 keV. Using a simple spher- ically symmetric wind model to describe the X-ray ab- sorption variations as a function of orbital phase, we in- ferred a wind mass-loss rate from the companion star of (1.3 − 2.5) × 10−6 M⊙/yr. Our results are consistent with those obtained by the Ginga X-ray observatory. We have also analyzed X-ray flux variations over the binary orbit and we have found a sharp increase at orbital phase 0.34 in both set of data. However, the increase at orbital phase 0.66 is significantly different in the two observa- tions. |
Description: | "The X-ray Universe 2008" Symposium held in Granada, Spain, 27-30 May, 2008; Published online at https://www.cosmos.esa.int/web/xmm-newton/2008-symposium, id.56. |
URI: | http://hdl.handle.net/10045/109372 |
Language: | eng |
Type: | info:eu-repo/semantics/conferenceObject |
Rights: | Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License |
Peer Review: | no |
Publisher version: | https://www.cosmos.esa.int/documents/332006/1107598/rodes_josej.pdf | https://ui.adsabs.harvard.edu/abs/2008xru..confE..56R/abstract |
Appears in Collections: | INV - Astronomía y Astrofísica - Comunicaciones a Congresos, Conferencias, etc. |
Files in This Item:
File | Description | Size | Format | |
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rodes_josej.pdf | Poster contribution XRU2008 | 108,97 kB | Adobe PDF | Open Preview |
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