A detailed reflection grating spectrometer analysis of the outflow of NGC 253
- Author(s)
- M. Bauer, W Pietech, Dieter Breitschwerdt, Matthias Ehle, Michael J. Freyberg, Andrew J. Read, Ginevra Trinchieri
- Abstract
NGC 253 is an edge-on starburst galaxy in the Sculptor group. Observations in X-rays by ROSAT, XMM-Newton and Chandra show a mixture of extended and point source emission in disk and halo (Pietsch et al., 2000, 2001; Strickland et al., 2000; Vogler & Pietsch, 1999). Especially interesting is the connection between the starburst driven outflow from the nuclear region into the halo of the galaxy (plume). We analyzed XMM-Newton data, taken with the Reflection Grating Spectrometer (RGS) in 2000 and 2003 with a total low background exposure time of 127.8 ks. We extracted spectra of the outflow for different regions. Depending on the distance to the center along the south-east semi minor axis of NGC 253, the spectra show many individual emission lines with varying intensity. We used line ratios to characterize the temperature and the ionization mechanism in these regions. Furthermore we extracted narrow-band RGS images to map the spatial origin of the different emission lines.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Max-Planck-Institut für extraterrestrische Physik, European Space Astronomy Centre (ESA), Duke University, INAF Osservatorio Astronomico di Brera
- Pages
- 443-444
- No. of pages
- 2
- Publication date
- 2006
- Austrian Fields of Science 2012
- 103003 Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/748173a2-0159-428b-b62c-188eed3c4b73