Journal Article

Spectral modelling of 1 ES 1218+30.4

M. Rüger, F. Spanier and K. Mannheim

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 401, issue 2, pages 973-976
Published in print January 2010 | ISSN: 0035-8711
Published online January 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2009.15738.x
Spectral modelling of 1 ES 1218+30.4

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We employ a time-dependent synchrotron-self-Compton code for modelling contemporaneous multiwavelength data of the blazar 1 ES 1218+30.4. The input parameters of the model are used to infer physical parameters of the emitting region. An acceptable fit to the data is obtained by taking into account a stellar emission component in the optical regime due to the host galaxy. The physical parameters inferred from the fit are in line with particle acceleration due to the Fermi mechanism providing s= 2.1 spectra. From the properties of the host galaxy in the optical, we estimate the central black hole mass and thus confirm that the jet power injected into the emission region is in the sub-Eddington regime, as expected for BL Lacertae objects.

Keywords: radiation mechanisms: non-thermal; BL Lacertae objects: individual: 1 ES 1218+30.4; gamma-rays: theory

Journal Article.  2544 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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