Mathematics – Logic
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.1305a&link_type=abstract
American Astronomical Society, AAS Meeting #211, #13.05; Bulletin of the American Astronomical Society, Vol. 39, p.755
Mathematics
Logic
Scientific paper
UGC10043 is an edge-on Sbc spiral galaxy with several peculiar morphological characteristics that distinguish it from typical Sb-Sc galaxies, suggesting a complex formation history and evolution. Despite its thin, dynamically cold stellar disk, it shows a vertically elongated, triaxial bulge that is bisected on its SW quadrant by a dust lane perpendicular to its major axis. It also exhibits a large-scale galactic wind powered by a faint central starburst. Such features relate UGC10043 to families of relatively rare objects such as polar ring galaxies, orthogonally decoupled bulge systems, and minor-axis dust-lane ellipticals, suggesting that its evolution must have included a significant merger or accretion event. New HI spectral imaging observations carried out with the VLA in its C and D configurations have provided us with new insight into the complex evolutionary history of UGC10043. Our observations reveal that the galaxy is located in a small group, and we detect HI emission from four of its galaxies. We also have uncovered a kinematically continuous HI bridge parallel to the major axis of UGC10043 that connects it to a previously unknown companion, MGC+04-37-035, which is being dynamically heated by the interaction. We will discuss how the current interaction has likely affected the present morphological and kinematic peculiarities of UGC10043 and more generally how studies of this system can offer important insights into how the group environment affects the structure and evolution of typical disk galaxies.
Aguirre Paula
Matthews Lynn Diane
Uson Juan M.
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