Mathematics – Logic
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.9713t&link_type=abstract
American Astronomical Society, AAS Meeting #211, #97.13; Bulletin of the American Astronomical Society, Vol. 39, p.906
Mathematics
Logic
Scientific paper
We present the preliminary results of a pixel-based analysis of nearby, mostly late-type galaxies using FUV (150 nm) and NUV (230 nm) imagery from GALEX, ground-based UBVR (VATT), 2MASS JHK, and mid-IR from Spitzer/IRAC (3.6-8.0 micron). More than half of the galaxies also have HST images from WFPC2 and/or ACS (mostly UBVI) allowing high-resolution analysis. Our sample consists of galaxies outside the Local Group and therefore we are not able to resolve individual stars within those galaxies. We have constructed from the above archival data a pan-chromatic database of matched-resolution images. We then analyzed each galaxies' stellar populations and spatial distribution of dust pixel-by-pixel through pixel color-magnitude and color-color diagrams. We find interesting features in these diagrams that correlate directly with spatial variations in mean stellar population ages and dust extinction, which no single wavelength regime alone can reveal. This approach surpasses simple one-dimensional radial profile analyses of galaxy structure. Late-type galaxies such as these are useful from a cosmological perspective, because they are descendents or analogs of the objects that may have finished reionization at z > 6.
Funding for this ADP project was provided through NASA/ADP grant NNX07AH50G.
Jansen Rolf A.
Tamura Kazuyuki
Windhorst Rogier A.
No associations
LandOfFree
Multi-Color Pixel-Based Analysis of Nearby Galaxies 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 Multi-Color Pixel-Based Analysis of Nearby Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-Color Pixel-Based Analysis of Nearby Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1480335