Open issues with the gamma-ray burst redshift distribution
نویسندگان
چکیده
منابع مشابه
Open issues with the gamma-ray burst redshift distribution
Cosmological gamma ray bursts (GRBs) are the brightest explosions in the Universe. Satellite detectors, such as Beppo-SAX, HETE2 and more recently Swift, have provided a wealth of data, including the localization and redshifts of subsets of GRBs. The redshift distribution has been utilized in several studies in attempts to constrain the evolving star formation rate and to probe GRB rate evoluti...
متن کاملSelection effects shaping the Gamma Ray Burst redshift distributions
Aims. Long Gamma Ray Bursts (GRBs) are associated to the death of massive stars and have been discovered, so far, up to z=6.29. Therefore, they hold the promise of probing star-formation and metal enrichment up to very high redshifts. However, the present GRB samples with redshift determinations are largely incomplete, and therefore a careful analysis of selection effects plaguing these samples...
متن کاملThe Swift Gamma-ray Burst Host Galaxy Legacy Survey. I. Sample Selection and Redshift Distribution
We introduce the Swift Gamma-Ray Burst Host Galaxy Legacy Survey (“SHOALS”), a multiobservatory high-redshift galaxy survey targeting the largest unbiased sample of long-duration gammaray burst hosts yet assembled (119 in total). We describe the motivations of the survey and the development of our selection criteria, including an assessment of the impact of various observability metrics on the ...
متن کاملGRB 050904 : A very high redshift gamma ray burst
We report near simultaneous multi-color (RIY JHK) observations made with the MAGNUM 2m telescope of the gamma ray burst GRB 050904 detected by the SWIFT satellite. The spectral energy distribution shows a very large break between the I and J bands. Using intergalactic transmissions measured from high redshift quasars we show that the observations place a 95% confidence lower limit of z = 6.18 o...
متن کاملGamma-ray Burst Selected High Redshift Galaxies: Comparison to Field
We study the internal structural properties of 37 long duration gamma-ray burst (GRB) host galaxies imaged with the Hubble Space Telescope. Our goal is to gain insights in the type of galaxies that gives rise to GRBs, and the relationship of GRB hosts to high-redshift galaxies selected through more traditional photometric methods. We measure structural properties of our sample from Hubble Space...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: New Astronomy Reviews
سال: 2007
ISSN: 1387-6473
DOI: 10.1016/j.newar.2007.03.003