The lag and duration-luminosity relations of gamma-ray burst pulses

Details The lag and duration-luminosity relations of gamma-ray burst pulses The lag and duration-luminosity relations of gamma-ray burst pulses

2011-09-21

arxiv.org/abs/1109.4581v1

A&A 519, 76 (2010)

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

8 pages, 5 figures, 1 table

Scientific paper

Relations linking the temporal or/and spectral properties of the prompt emission of gamma-ray bursts (hereafter GRBs) to the absolute luminosity are of great importance as they both constrain the radiation mechanisms and represent potential distance indicators. Here we discuss two such relations: the lag-luminosity relation and the newly discovered duration-luminosity relation of GRB pulses. We aim to extend our previous work on the origin of spectral lags, using the duration-luminosity relation recently discovered by Hakkila et al. to connect lags and luminosity. We also present a way to test this relation which has originally been established with a limited sample of only 12 pulses. We relate lags to the spectral evolution and shape of the pulses with a linear expansion of the pulse properties around maximum. We then couple this first result to the duration-luminosity relation to obtain the lag-luminosity and lag-duration relations. We finally use a Monte-Carlo method to generate a population of synthetic GRB pulses which is then used to check the validity of the duration-luminosity relation. Our theoretical results for the lag and duration-luminosity relations are in good agreement with the data. They are rather insensitive to the assumptions regarding the burst spectral parameters. Our Monte Carlo analysis of a population of synthetic pulses confirms that the duration-luminosity relation must be satisfied to reproduce the observational duration-peak flux diagram of BATSE GRB pulses. The newly discovered duration-luminosity relation offers the possibility to link all three quantities: lag, duration and luminosity of GRB pulses in a consistent way. Some evidence for its validity have been presented but its origin is not easy to explain in the context of the internal shock model.

Affiliated with

Also associated with

No associations

Rating

The lag and duration-luminosity relations of gamma-ray burst pulses 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 The lag and duration-luminosity relations of gamma-ray burst pulses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The lag and duration-luminosity relations of gamma-ray burst pulses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-258036