Spectral variability studies and acceleration scenarios in jets of blazars

Details Spectral variability studies and acceleration scenarios in jets of blazars Spectral variability studies and acceleration scenarios in jets of blazars

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009phdt.........8j&link_type=abstract

Proquest Dissertations And Theses 2009. Section 0167, Part 0606 172 pages; [Ph.D. dissertation].United States -- Ohio: Ohio Uni

Other

2

Jets, 3C 6A, Internal Shock Model, Multiple Zone Scheme, Spectral Modeling, Multiwavelength Campaign, Mdm Observatory, Blazars

Scientific paper

This work focuses on the study of spectral energy distributions (SEDs) and the spectral variability patterns of blazars, especially BL Lac objects. It also investigates the dominant mode of particle acceleration in the jets of blazars.
The first part of the work describes the BL Lac object 3C 66A, which was the target of an intensive multiwavelength campaign in 2003/2004. During the campaign, flux measurements from radio to X-ray frequencies and upper limits in the very high energy (VHE) g-ray regime were obtained. A time-dependent leptonic jet model has been used to obtain a detailed description of the physical processes in 3C 66A. This successful model results in the reproduction of the observed spectral energy distribution (SED) and the optical variability pattern. The model also predicts an intrinsic cutoff value for the VHE g-ray emission and the possibility of the object being observed by MAGIC, Fermi, and other future missions.
The second part of the work uses the internal shock model to explore the particle acceleration scenarios and the subsequent production of radiation via synchrotron and synchrotron self-Compton processes at sub-pc scales of a relativistic jet. A code has been developed to simulate the acceleration mechanism and to calculate the resulting spectrum after accounting for the inhomogeneity in the photon density throughout the acceleration region by dividing the region into multiple zones and considering the subsequent time- dependent radiation transfer within the zone and in between zones. An extensive study to understand the effects of varying shock and radiative parameters on the SED and spectral lightcurves of a generic blazar source has been carried out to aid in future theoretical analysis of such sources.
This dissertation also includes a brief description of the observations conducted with the 1.3 m McGraw-Hill telescope of the MDM observatory at Kitt Peak, Arizona. The observations were carried out as a part of an ongoing long- term project designed to monitor the optical variability of a sample of g-ray loud blazars on various time scales and carry out follow-up observations of the optical afterglows of gamma-ray bursts, should the occasion arise.

Affiliated with

Also associated with

No associations

Rating

Spectral variability studies and acceleration scenarios in jets of blazars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spectral variability studies and acceleration scenarios in jets of blazars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectral variability studies and acceleration scenarios in jets of blazars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1644620