University of Leicester
Browse
MNRAS-2004-Page-57-67.pdf (434.52 kB)

XMM-Newton observations of 3C 273

Download (434.52 kB)
journal contribution
posted on 2012-10-24, 09:22 authored by Kim L. Page, Martin J. L. Turner, C. Done, Paul T. O'Brien, J. N. Reeves, S. Sembay, M. Stuhlinger
A series of nine XMM–Newton observations of the radio-loud quasar 3C 273 are presented, concentrating mainly on the soft excess. Although most of the individual observations do not show evidence for iron emission, co-adding them reveals a weak, broad line (EW ∼56 eV). The soft excess component is found to vary, confirming previous work, and can be well fitted with multiple blackbody components, with temperatures ranging between ∼40 and ∼330 eV, together with a power law. Alternatively, a Comptonization model also provides a good fit, with a mean electron temperature of ∼350 eV, although this value is higher when the soft excess is more luminous over the 0.5–10 keV energy band. In the reflection grating spectrometer spectrum of 3C 273, a strong detection of the O vii Heα absorption line at zero redshift is made; this may originate in warm gas in the local intergalactic medium, consistent with the findings of both Fang, Sembach & Canizares and Rasmussen, Kahn & Paerels.

History

Citation

Monthly Notices of the Royal Astronomical Society, 2004, 349 (1), pp. 57-67

Version

  • VoR (Version of Record)

Published in

Monthly Notices of the Royal Astronomical Society

Publisher

Oxford University Press (OUP) on behalf of the Royal Astronomical Society

issn

0035-8711

eissn

1365-2966

Copyright date

2004

Available date

2012-10-24

Publisher version

http://mnras.oxfordjournals.org/content/349/1/57.abstract

Language

English

Usage metrics

    University of Leicester Publications

    Categories

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC