Bonn 2010 – scientific programme

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T: Fachverband Teilchenphysik

T 95: Gammaastronomie IV

T 95.2: Talk

Thursday, March 18, 2010, 17:00–17:15, JUR F

Spectral modelling of 1 ES 1218+30.4 — •Michael Rüger and Felix Spanier — Instititut für Theoretische Physik und Astrophysik, Universität Würzburg

We employ a time-dependent synchrotron-self-Compton code for modeling 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.