Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..393..267s&link_type=abstract
New Horizons in Astronomy: Frank N. Bash Symposium 2007 ASP Conference Series, Vol. 393, proceedings of the conference held 14-1
Astronomy and Astrophysics
Astronomy
Scientific paper
We present an unusual S0 galaxy with narrow, luminous, very blue inner and outer resonance rings along with a strong bar. Its dwarf companion at ΔX ˜ 30 kpc and ΔV ≲30 km/s is also bright blue. We perform stellar population analysis of UGRIZ photometry to test the hypothesis of coeval interaction-triggered starbursts in both systems across a wide range of scales. We also investigate the possibility of nuclear activity. The rare combination of resonances in the primary galaxy may reflect a short-lived evolutionary state that is key to understanding coordinated bulge and disk growth, possibly as part of a transformation from a classical S0 to an S0 with a pseudobulge, or a later type galaxy.
Kannappan Sheila J.
Scarborough T. A.
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