Astronomy and Astrophysics – Astronomy
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.8806g&link_type=abstract
American Astronomical Society, AAS Meeting #212, #88.06; Bulletin of the American Astronomical Society, Vol. 40, p.268
Astronomy and Astrophysics
Astronomy
Scientific paper
The dwarf irregular galaxy NGC 1569 is the closest and strongest starburst galaxy to the Milky Way, and contains three of the most massive super star clusters ever discovered. Using the ACS/WFC on the Hubble Space Telescope we have obtained the deepest optical photometry of this galaxy to date, yielding a V,I color-magnitude diagram (CMD) with some 450,000 stars. These data have allowed us, for the first time, to unequivocally measure the brightness of the tip of the red giant branch and thereby determine the distance to NGC 1569. We find that this galaxy lies 40% farther away than what is typically assumed. The longer distance makes NGC 1569 an even more extreme starburst galaxy; previous estimates of the star formation shift to younger epochs and the rate of star formation becomes stronger by a factor of 2. In addition, with the new distance the dynamical masses of the super star clusters increase by 40% while their luminosities double. Preliminary results on the star formation history of NGC 1569 as inferred from the observed CMD will also be presented.
Aloisi Alessandra
Angeretti L.
Annibali Francesca
Greggio Laura
Grocholski Aaron J.
No associations
LandOfFree
Distance to NGC 1569 via Deep HST/ACS Photometry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Distance to NGC 1569 via Deep HST/ACS Photometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distance to NGC 1569 via Deep HST/ACS Photometry will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1397391