Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21341906j&link_type=abstract
American Astronomical Society, AAS Meeting #213, #419.06; Bulletin of the American Astronomical Society, Vol. 41, p.234
Astronomy and Astrophysics
Astronomy
Scientific paper
The intrinsic shape of dwarf irregular (dIm) galaxies remains controversial. Projected minor-to-major axis ratios provide insufficient data to determine the shapes of dIm galaxies. However, the stellar velocity dispersion coupled with the maximum rotational velocity derived from HI observations gives a measure of how kinematically hot a system is, and, therefore, indicates its structure. We present, for the first time, the stellar kinematics of NGC 1569 obtained using the KPNO 4-m+Echelle spectrograph. These data are combined with the HI rotation velocity obtained from VLA observations acquired by the THINGS group. NGC 1569 is the first of four dIm galaxies for which optical spectroscopic observations have been completed. The PI's dissertation thesis project will be based on the completion of observations obtained using the KPNO 4-m+Echelle spectrograph for a total sample of 4 dIm galaxies, including NGC 1569.
We would like to thank the NSF for the funding necessary for the VLA observations as well as the Lowell Observatory Pre-doctoral Program which has made it possible for the PI to complete her Ph. D. thesis project.
Hunter Deidre Ann
Jackson Megan C.
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