Constraining the Luminosity Function of GRBs from Time Dilation, Brightness Distribution and Redshift Data

Details Constraining the Luminosity Function of GRBs from Time Dilation, Brightness Distribution and Redshift Data Constraining the Luminosity Function of GRBs from Time Dilation, Brightness Distribution and Redshift Data

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.2907d&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #29.07; Bulletin of the American Astronomical Society, Vol. 31, p.1413

Mathematics

Logic

Scientific paper

We constrain the luminosity function of gamma ray bursts (GRBs) by testing several cosmological models versus a combination of (1) observed time dilation in the peak-to-peak time scales of GRB light curves, (2) the Log N - Log P number counts relation, and (3) GRB luminosities directly determined from recent redshift measurements and apparent GRB brightness. A power law luminosity function φ (L) = C ṡ L-β (Lmin < L < Lmax) is examined within three cosmological models, with cosmological parameters (Ω 0, Ω Λ ) = (1.0, 0.0), (0.3, 0.0), or (0.3, 0.7). It is found that GRB models with constant comoving density rate do not fit the data while models with GRB density evolution tracing the observed star formation rate can accomodate all the observed data. The width K = Lmax / Lmin of the luminosity function is found to be K > 100 at the 1 σ level, while the average luminosity is found to be 4 +/- 2 x 1051 ergs ṡ s-1 at the 3 σ level, this implies that bursts at the BATSE 100 % efficiency threshold have typical red shifts of = 2.7 +/- 0.5.

Affiliated with

Also associated with

No associations

Rating

Constraining the Luminosity Function of GRBs from Time Dilation, Brightness Distribution and Redshift Data 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 Constraining the Luminosity Function of GRBs from Time Dilation, Brightness Distribution and Redshift Data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining the Luminosity Function of GRBs from Time Dilation, Brightness Distribution and Redshift Data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1737352