Branduardi Raymont, G;
Petrucci, PO;
Paltani, S;
Malzac, J;
Kaastra, J;
Cappi, M;
Ponti, G;
... Lubinski, P; + view all
(2012)
Multiwavelength campaign on Mrk 509: testing realistic comptonization models.
In:
Proceedings of 'An INTEGRAL view of the high-energy sky (the first 10 years)' - 9th INTEGRAL Workshop and celebration of the 10th anniversary of the launch (INTEGRAL 2012).
(pp. -).
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Abstract
Mrk 509 was observed by XMM-Newton and INTEGRAL in October/November 2009, with one observation every four days for a total of ten observations. Each observation has been fitted with a realistic thermal Comptonization model for the continuum emission. Prompted by the correlation between the UV and soft X-ray flux, we used a thermal Comptonization component for the soft X-ray excess. The UV to X-ray/gamma-ray emission of Mrk 509 can be well fitted by these components, pointing to the existence of a hot (kT ∼ 100 keV), optically-thin (τ ∼ 0.5) corona producing the primary continuum. In contrast, the soft X-ray component requires a warm (kT ∼ 1 keV), optically-thick (τ ∼ 10-20) plasma. Estimates of the amplification ratio for this warm plasma support a configuration relatively close to the “theoretical” configuration of a slab corona above a passive disk. This plasma could be the warm upper layer of the accretion disk. In contrast, the hot corona has a more photon-starved geometry. The high temperature (∼ 100 eV) of the soft-photon field entering and cooling it favors a localization of the hot corona in the inner flow. This soft-photon field could be part of the comptonized emission produced by the warm plasma.
| Type: | Proceedings paper |
|---|---|
| Title: | Multiwavelength campaign on Mrk 509: testing realistic comptonization models |
| Event: | Integral 2012: An INTEGRAL view of the high-energy sky (the first 10 years) - 9th INTEGRAL Workshop and celebration of the 10th anniversary of the launch |
| Location: | Paris, France |
| Dates: | 2012-10-15 - 2012-10-19 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | http://pos.sissa.it/cgi-bin/reader/conf.cgi?confid... |
| Language: | English |
| Additional information: | © 2012 The Authors. Publication available under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 licence (CC BY-NC-SA) described at http://creativecommons.org/licenses/by-nc-sa/3.0/. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1420273 |
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