The peak luminosity-peak energy correlation in gamma-ray bursts (CROSBI ID 260431)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Ghirlanda, G. ; Ghisellini, G. ; Firmani, C. ; Celotti, A. ; Bošnjak, Željka
engleski
The peak luminosity-peak energy correlation in gamma-ray bursts
We derive the correlation between the peak luminosity Liso and the peak energy of the νFν spectrum Epeak using 25 long gamma-ray bursts (GRBs) with firm redshift measurements. We find that its slope is similar to that of the correlation between the time-integrated isotropic emitted energy Eiso and Epeak. For the 16 GRBs in our sample with estimated jet opening angle, we compute the collimation-corrected peak luminosity Lγ, and find that it correlates with Epeak. This correlation has, however, a scatter larger than that of the correlation between Epeak and Eγ (the time-integrated emitted energy, corrected for collimation), which we ascribe to the fact that the opening angle is estimated through the global energetics. We have then selected a large sample of 442 GRBs with pseudo- redshifts, derived through the lag-luminosity relation, to test the existence of the Liso-Epeak correlation. With this sample we also explore the possibility of a correlation between time-resolved quantities, namely Lpiso and the peak energy at the peak of emission Eppeak.
cosmology: observations, gamma-rays: bursts
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Podaci o izdanju
360 (1)
2005.
L45-L49
objavljeno
1745-3925
10.1111/j.1745-3933.2005.00043.x