X-ray spectrum of the superwind starburst galaxy NGC 253
Minimum credit line: Image courtesy of M. Bauer, Max-Planck Institute for extraterrestrial Physics, Germany and ESA. (for details, see Conditions of Use).
Credit: ESA/XMM-Newton, CC BY-SA 3.0 IGO
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| About this Image |
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XMM-Newton spectra of the superwind starburst galaxy NGC 253 were obtained with the RGS spectrometer in June 2000 and in June 2003. The figure shows fluxed RGS spectra with bright emission lines indicated. The different spectra were extracted from regions with different distance (z) perpendicular to the galactic plane following the emission from the superwind out of the starburst nucleus along the semi minor axis.
Investigator(s): M. Bauer, W. Pietsch, G. Trinchieri, D. Breitschwerdt, M. Ehle and A. Read
| For More Information |
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- Read the Journal article
- Detailed description of this image
- Query XSA archive for XMM-Newton data in the field of NGC 253
- Astronomical database entries for NGC 253;
- Query NED for more images about NGC 253
- Query SIMBAD for more NGC 253 data
- For unfamiliar terms, visit the XMM-Newton Astronomical Glossary
| Instrument | RGS | ||
| Observing Mode | Spectroscopy | ||
| Filter | N/A | ||
| Date of Observation | 2003-06-19 | ||
| Image size | 26.00 x 26.00 arcmin | ||
| Detailed Caption | The spectra are dominated by Ly emission lines of silicon, magnesium, neon, oxygen, nitrogen and carbon together with their helium-state emission lines. Additionally we see emission lines from iron. The line strength changes with distance from the galactic centre as the outflowing gas cools. Temperatures in the outflow are between 0.79 keV in the centre of the galaxy down to 0.21 keV furthest away from the starburst nucleus. The iron lines point at a primarily collisional ionized plasma. They also show features of a non-equilibrium plasma especially in region SE 1, where we see additional emission from delayed recombining Fe XVIII. | ||
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