Estimation of the Star Formation Rate Using Long-Gamma Ray Bursts Observed by Swift
Abstract
In this work we estimate the star formation rate (SFR) through 333 long-GRBs detected by Swift. This investigation is based on the empirical model proposed by Yüksel et al. (2008). Basically, the SFR is estimated using long-GRBs considering that they have a stellar origin based on the collapsar model or the collapse of massive stars (hypernovae) M > 20M⊙. The analysis starts with the study of ɛ(z) which accounts for the long-GRBs production rate and is parameterized by ɛ(z)=ɛ0(1 + z)δ, where ɛ0 includes the SFR absolute conversion to GRBs rate in a luminosity range already defined and δ is a dynamical parameter which changes at different regions of redshift; it accounts for the SFR slope which is obtained by an analysis of linear regression over our long-GRBs sample. The results obtained provide evidence that supports our proposal to use Long-GRBs as tracers of SFR.
- Publication:
-
Revista Mexicana de Astronomia y Astrofisica
- Pub Date:
- October 2018
- DOI:
- 10.48550/arXiv.2006.03367
- arXiv:
- arXiv:2006.03367
- Bibcode:
- 2018RMxAA..54..309E
- Keywords:
-
- galaxies: star formation;
- gamma-ray burst: general;
- stars: massive;
- Astrophysics - Astrophysics of Galaxies;
- Astrophysics - Cosmology and Nongalactic Astrophysics;
- 85-11 (Primary) 85A35;
- 85-10 (Secondary)
- E-Print:
- 10 pages, 6 figures