AAS 207th Meeting, 8-12 January 2006
Session 69 Stellar Evolution
Poster, Tuesday, 9:20am-6:30pm, January 10, 2006, Exhibit Hall

Previous   |   Session 69   |   Next  |   Author Index   |   Block Schedule

[69.08] Color-Color Analysis of GLIMPSE Point Sources

D. Capellupo (University of Rochester), E. Churchwell (UW-Madison)

For my summer REU project at the University of Wisconsin-Madison, I analyzed color-color diagrams of point sources from the GLIMPSE survey. The Galactic Legacy Infrared Mid-Plane Survey Extraordinaire used the Spitzer space telescope to cover the longitude range l = +/-10 to 65 degrees and latitude b = -1 to 1 degree in four mid-infrared wavelength bands (3.6, 4.5, 5.8, and 8.0 microns). Out of the 30 million point sources in the GLIMPSE catalog, 44,464 have a [K]-[8.0] color of at least 3. These objects were plotted in a logarithmic contour plot on a [3.6]-[8.0] versus [3.6]-[4.5] color-color diagram. Two distinct peaks appear on this plot, one (upper peak) centered around (x=0.54,y=1.78) and the other (lower peak) centered around (x=0.41,y=0.95). It turns out that the objects in the upper peak are fairly evenly distributed throughout the GLIMPSE survey region, while the lower peak objects tend to cluster in dense star-forming regions. After doing a SIMBAD search on these objects, only one object in the SIMBAD database could be determined a match to a lower peak object: a YSO. For the upper peak, there were 23 matches, including 6 YSOs, 4 H-alpha emission stars, and 9 high-amplitude variables. This research was supported by the NSF through an Astronomy and Astrophysics REU site grant (AST-0453442) at UW-Madison.

If you would like more information about this abstract, please follow the link to http://www.astro.wisc.edu/~daniel/. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

Previous   |   Session 69   |   Next

Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.