Line profiles from hot star winds; absorption of X-rays from hot star winds.These models address two related problems in X-ray emission from hot star winds. The first group of models (windprof et al.) calculate the shape of emission lines from hot star winds, taking into account the distributed X-ray emission and the absorption by the cool component of the wind. These are additive models. The second group of models (windtabs et al.) calculate the broadband absorption of X-rays emitted from hot star winds. This in analogy with wabs or tbabs, but taking into account the wind geometry and ionization. These are multiplicative models. The line profile models implement physics described in Owocki & Cohen (2001), Owocki & Cohen (2006), Leutenegger et al. (2006), and Leutenegger et al. (2007). The wind absorption models are described in Leutenegger et al. (2010). The source code may obtained from GitHub with the command: git clone https://github.com/mauriceleutenegger/windprofileand updated with any changes using git pull
The wind absorption models require the user to supply two data files, an
opacity file, and a transmission file. These files are specified using
xset, as in the following example:
Summary of models:
Examples of typical parameters: 1 1 windprof q 0.0 frozen 2 1 windprof taustar 1.00000 frozen 3 1 windprof u0 0.500000 frozen 4 1 windprof h 0.0 frozen 5 1 windprof tau0star 0.0 frozen 6 1 windprof beta 1.00000 frozen 7 1 windprof betaSob 0.0 frozen 8 1 windprof numerica 0 frozen 9 1 windprof anisotro 0 frozen 10 1 windprof rosselan 0 frozen 11 1 windprof expansio 0 frozen 12 1 windprof thick 0 frozen 13 1 windprof waveleng A 24.7810 frozen 14 1 windprof shift mA 0.0 frozen 15 1 windprof velocity km/s 2485.00 frozen 16 1 windprof verbose 0 frozen 17 1 windprof norm 1.00000
1 1 hwind q 0.0 frozen 2 1 hwind taustar 1.00000 frozen 3 1 hwind u0 0.500000 frozen 4 1 hwind h 0.0 frozen 5 1 hwind tau0star 0.0 frozen 6 1 hwind beta 1.00000 frozen 7 1 hwind betaSob 0.0 frozen 8 1 hwind numerica 0 frozen 9 1 hwind anisotro 0 frozen 10 1 hwind rosselan 0 frozen 11 1 hwind expansio 0 frozen 12 1 hwind thick 0 frozen 13 1 hwind Z 8 frozen 14 1 hwind shift mA 0.0 frozen 15 1 hwind velocity km/s 2485.00 frozen 16 1 hwind verbose 0 frozen 17 1 hwind norm 1.00000Parameters are as for windprof; except
1 1 hewind q 0.0 frozen 2 1 hewind taustar 1.00000 frozen 3 1 hewind u0 0.500000 frozen 4 1 hewind h 0.0 frozen 5 1 hewind tau0star 0.0 frozen 6 1 hewind beta 1.00000 frozen 7 1 hewind betaSob 0.0 frozen 8 1 hewind G 0.700000 frozen 9 1 hewind numerica 0 frozen 10 1 hewind anisotro 0 frozen 11 1 hewind rosselan 0 frozen 12 1 hewind expansio 0 frozen 13 1 hewind thick 0 frozen 14 1 hewind Z 12 frozen 15 1 hewind shift mA 0.0 frozen 16 1 hewind velocity km/s 2485.00 frozen 17 1 hewind phiratio 131.000 frozen 18 1 hewind verbose 0 frozen 19 1 hewind norm 1.00000Parameters are as for hwind; except
1 1 windtabs Sigma* g/cm2 1.00000E-02 frozenThe only free parameter of windtabs is
GSLGSL is now included in HEASOFT, as of version 6.27. For versions prior to 6.27, the following instructions detail how to install the models with GSL. The models require the GNU scientific library (libgsl). GSL is available with most well-known GNU/Linux distributions and is also available on OS X using macports or fink. For some distributions the library and the development packages are separate, in which case both must be installed. The GSL library must be linked to the Xspec local models library. Xspec must be modified to enable this linking. The easiest way to do this is to make the modification during the HEASOFT installation process. To do this, run the script addGSL.py (included in the windprof local model source code distribution) from $HEADAS/../BUILD_DIR after ./configure and before make. For OS X, because the library is dynamically linked, it is also possible to upgrade an existing installation by running addGSL.py from $HEADAS/../BUILD_DIR, and then running rebuildinitpackage (also included in the windprof local model source code distribution). HEASOFT must be initialized for this to work. For Linux, the library is statically linked, so upgrading an existing installation is more time-consuming. This can be done by rebuilding the XSPEC binary (see the XSPEC FAQ #10). For further instructions on building XSPEC from source, please see the installation page. Keith Arnaud, Lab. for High Energy Astrophysics, NASA/Goddard Space Flight Center HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public Last modified: Tuesday, 07-Apr-2020 11:07:25 EDT The Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center (GSFC) seeks a creative, innovative individual with strong teamwork and leadership skills to serve as Director of the High Energy Astrophysics Science Archive Research Center (HEASARC). This will be a permanent civil servant position. + Learn more. |