Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-05-16
Astrophys.J.659:958-975,2007
Astronomy and Astrophysics
Astrophysics
17 pages, 9 figures, ApJ, in press, v.660, May 1, 2007 (minor changes from previous version)
Scientific paper
10.1086/512533
A study of the statistics of cosmological black-hole jet sources is applied to EGRET blazar data, and predictions are made for GLAST. Black-hole jet sources are modeled as collimated relativistic plasma outflows with radiation beamed along the jet axis due to strong Doppler boosting. The comoving rate density of blazar flares is assumed to follow a blazar formation rate (BFR), modeled by analytic functions based on astronomical observations and fits to EGRET data. The redshift and size distributions of gamma-ray blazars observed with EGRET, separated into BL Lac object (BL) and flat spectrum radio quasar (FSRQ) distributions, are fit with monoparametric functions for the distributions of the jet Lorentz factor \Gamma, comoving directional power l'_e, and spectral slope. A BFR factor ~10 x greater at z ~ 1 than at present is found to fit the FSRQ data. A smaller comoving rate density and greater luminosity of BL flares at early times compared to the present epoch fits the BL data. Based on the EGRET observations, ~1000 blazars consisting of ~800 FSRQs and FR2 radio galaxies and ~200 BL Lacs and FR1 radio galaxies will be detected with GLAST during the first year of the mission. Additional AGN classes, such as hard-spectrum BL Lacs that were mostly missed with EGRET, could add more GLAST sources. The FSRQ and BL contributions to the EGRET gamma-ray background at 1 GeV are estimated at the level of ~10 - 15% and ~2 - 4%, respectively. EGRET and GLAST sensitivities to blazar flares are considered in the optimal case, and a GLAST analysis method for blazar detection is outlined.
No associations
LandOfFree
Statistics of Cosmological Black Hole Jet Sources: Blazar Predictions for GLAST 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 Statistics of Cosmological Black Hole Jet Sources: Blazar Predictions for GLAST, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Statistics of Cosmological Black Hole Jet Sources: Blazar Predictions for GLAST will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-490199