The Host Galaxies of Long-Duration GRBs

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#87120 by @ 18.05.2006 00:00 - nach oben -
The Host Galaxies of Long-Duration GRBs

What causes the powerful explosions known as gamma-ray bursts?

Astrophysicists still aren't sure, but the longest duration
gamma-ray bursts
(GRBs) seem to involve very massive stars.

A new clue indicating this was uncovered recently by a series of images taken by the
orbiting Hubble Space Telescope.

These images,
shown above, indicate that
long duration GRBs typically appear to come from galaxies and
regions of galaxies with bright regions rich with
star formation and bright, massive stars.

Long GRBs are therefore different than many types of
which occur more uniformly distributed in their host galaxies.

Since such active star forming regions are
relatively rare in our
Milky Way Galaxy, the chances of a
nearby GRB affecting life on Earth are
relatively slight.

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