Revealing the Stellar Populations Underlying the Dust in NGC 0959

Details Revealing the Stellar Populations Underlying the Dust in NGC 0959 Revealing the Stellar Populations Underlying the Dust in NGC 0959

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543212t&link_type=abstract

American Astronomical Society, AAS Meeting #215, #432.12; Bulletin of the American Astronomical Society, Vol. 42, p.368

Astronomy and Astrophysics

Astronomy

Scientific paper

Combining optical V-band and mid-IR 3.6 micron images, with a pixel-to-pixel analysis, we measured the two-dimensional distribution of dust extinction in the nearby late-type spiral. We present a panchromatic study of stellar populations in the form of a pixel Color-Color Diagram (pCCD) of (B-3.6 micron) vs (FUV-U) colors. After the application of our extinction correction (Tamura et al. 2009), we select and color-code groups of pixels with distinct distribution patterns in this pCCD. These groups are traced in the same pCCD prior to extinction correction, and in the pixel-coordinate map of the galaxy. We find that the pixel-based (two-dimensional) dust-extinction correction is critical to reveal the properties of the dominant stellar population on the scale of individual pixels, as well as on both intermediate- and large-spatial scales. Galaxy structures, such as a previously unseen bar, and different types of stellar populations, become readily discernible in the extinction-corrected pCCD and pixel-coordinate map.
Funding for this project is provided through NASA/ADP grant NNX07AH50G and JWST grant NAG 5-12460.

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