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Source evolution function of cosmological gamma-ray bursts

Title
Source evolution function of cosmological gamma-ray bursts
Authors
Kim C.Yang J.Yi I.
Ewha Authors
양종만
SCOPUS Author ID
양종만scopus
Issue Date
1999
Journal Title
Journal of the Korean Physical Society
ISSN
0374-4884JCR Link
Citation
vol. 34, no. 5, pp. 459 - 462
Indexed
SCI; SCIE; SCOPUS; KCI WOS scopus
Abstract
We test several possible source evolution functions of gamma-ray bursts (GRBs) by using the 〈V/V max〉 statistic. Based on the star-formation-rate (SFR)-related source evolution function and the standard candle assumption, we consider an exponential function and compare it with two other source evolutionary scenarios, a constant number density (no evolution) and a broken power-law function evolution. Although the observed GRBs are well accounted for by using the standard model with a constant number density, we show that when the widths are sufficiently broad (Δz > 2.0), the assumed Gaussian-like functions can also fit the observed 〈V/V max〉 within a 3σ significance level. We conclude that sharply peaked source evolution functions are ruled out.
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자연과학대학 > 물리학전공 > Journal papers
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