The blue colors of Gamma-ray burst host galaxies

Details The blue colors of Gamma-ray burst host galaxies The blue colors of Gamma-ray burst host galaxies

2002-11-12

arxiv.org/abs/astro-ph/0211252v1

Astronomy and Astrophysics

Astrophysics

1 page, 1 figure, Conf. Proc., "Galaxy Evolution: Theory and Observations", Cozumel 2002, Eds. V. Avila-Reese, C. Firmani, C.

Scientific paper

There is now an increasing number of evidence supporting the idea that the cosmic Gamma-ray Bursts (GRBs) originate from the collapse of massive stars in distant star-forming galaxies. Because GRBs are likely detectable up to very high redshift, and because the gamma-rays are not attenuated by intervening columns of gas and dust, these phenomena thus offer a unique perspective to probe the star formation in the early Universe independently of the biases associated with dust extinction. We report on the R-K colors of the GRB host galaxies. We find that they are very blue sources, with colors comparable to those of the faint blue star-forming galaxies at high redshift.

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