کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10704625 | 1022013 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the nature of nearby GRB/SN host galaxies
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We present and discuss optical diagnostics of the low redshift (z < 0.2) galaxies that are known to have hosted supernovae associated with γ-ray bursts (GRBs). The three galaxies are all actively star forming sub-luminous (L < Lâ) galaxies with relatively low metallicities (Z â²Â Zâ). We find no evidence for substantial internal extinction within any of the galaxies. We derive star formation rates (SFR) based on Hα luminosities, as well as specific star formation rates (SSFR, star formation rate per unit luminosity). For GRB 980425 (SN 1998bw) we use photometry of the supernova environment to estimate the mass of the progentitor to â³30 Mâ. These three host galaxies have global properties (luminosities, SFR, SSFR, metallicity, colour, reddening) that resemble those of more distant GRB host galaxies. We also compare the host galaxies with a sample of Blue Compact Galaxies (BCGs) in the local universe, and show that these samples have similar properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy - Volume 11, Issue 2, November 2005, Pages 103-115
Journal: New Astronomy - Volume 11, Issue 2, November 2005, Pages 103-115
نویسندگان
J. Sollerman, G. Ãstlin, J.P.U. Fynbo, J. Hjorth, A. Fruchter, K. Pedersen,