Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aspc..423...69k&link_type=abstract
Galaxy Wars: Stellar Populations and Star Formation in Interacting Galaxies ASP Conference Series Vol. 423, proceedings of a con
Astronomy and Astrophysics
Astronomy
Scientific paper
We present broadband HST / WFPC2 images, ground-based Hα images, and VLA H I 21 cm emission maps of the nearby galaxy ESO 1327-2041, which is located 38″ west of the quasar PKS 1327-206. We find H I 21 cm absorption in the quasar spectrum at czabs = 5250 and 5500 km s-1, the same velocities that metal lines of Na I and Ca II were previously discovered. We attribute this absorption to disk gas from a disrupted spiral arm revealed by our HST images. Our optical spectra show Hα emission from several clumps of material along this disrupted spiral arm that are located ˜5″ from the quasar position (˜2 h70-1 kpc in projection). As shown clearly in our HST images, ESO 1327-2041 appears to be the result of a recent merger that ejected a galaxy nucleus from the system. Our ground-based Hα images reveal the presence of several H II regions in an inclined disk near the galaxy's center, which likely represent star formation triggered by the merger.
Carilli Chris
Keeney Brian A.
Stocke John T.
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