The continuous star formation history of a giant HII region in M101

Details The continuous star formation history of a giant HII region in M101 The continuous star formation history of a giant HII region in M101

2007-02-08

arxiv.org/abs/astro-ph/0702238v1

Astronomy and Astrophysics

Astrophysics

2 pages, 2 figures. Proceeding of the conference From Stars to Galaxies: Building the pieces to build up the Universe (Venice,

Scientific paper

We present results about the star formation process in the giant HII region NGC 5471 in the outskirts of M101. From resolved HST/WPFC2 photometry we find that star formation has been going for the last 70 Myr. We further compare previous results from integrated infrared-optical photometry with the stellar resolved CMD and we discuss the star formation properties of this region and its individual knots, as well as characterizing the different stellar content. This result has very important consequences in our understanding of the burst versus continuous star formation activity in spiral galaxies.

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