Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725125j&link_type=abstract
American Astronomical Society, AAS Meeting #217, #251.25; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Extinction effects are ubiquitous in the interstellar medium of galaxies. In particular, extinction due to molecular clouds can significantly change the color and brightness of background or embedded objects. The structure of molecular clouds is an important observable, relevant for the initial conditions under which star formation takes place. Mapping the effects of extinction across a molecular cloud can be used to deduce its internal structure. We present such an analysis for Bok Globule CB188 which we observed with the 0.9m SARA telescope at Kitt Peak National Observatory. The geometry of CB188 is such that it can be approximated by a spherical model. We investigate several possible density structures (such as constant density and the Bonnor-Ebert model) and compare them to our observations of a changing apparent radius as a function of wavelength.
This project was funded by the National Science Foundation Research Experiences for Undergraduates (REU) program through grant NSF AST-1004872.
Hartmann Dieter H.
Johnson Andrew
Updike Adria C.
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