Tytuł pozycji:
Protecting Life in the Milky Way: Metals Keep the GRBs Away
- Tytuł:
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Protecting Life in the Milky Way: Metals Keep the GRBs Away
- Autorzy:
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Stanek, K. Z.
Gnedin, O. Y.
Beacom, J. F.
Gould, A. P.
Johnson, J. A.
Kollmeier, J. A.
Modjaz, M.
Pinsonneault, M. H.
Pogge, R.
Weinberg, D. H.
- Data publikacji:
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2006
- Słowa kluczowe:
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Gamma rays: bursts
- Język:
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angielski
- Dostawca treści:
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BazTech
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Przejdź do źródła Link otwiera się w nowym oknie
The host galaxies of the five local, z≤0.25, long-duration gamma-ray bursts (GRBs 980425, 020903, 030329, 031203 and 060218), each of which had a well-documented associated supernova, are all faint and metal-poor compared to the population of local star-forming galaxies. We quantify this statement by using a previous analysis of star-forming galaxies (0.005iso, steeply decreases with increasing host oxygen abundance. This might further indicate that (low) metallicity plays a fundamental physical role in the GRB phenomenon, and suggesting an upper metallicity limit for "cosmological" GRBs at ≈0.15 Zsolar.
