Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.9714s&link_type=abstract
American Astronomical Society, AAS Meeting #211, #97.14; Bulletin of the American Astronomical Society, Vol. 39, p.906
Astronomy and Astrophysics
Astrophysics
Scientific paper
We present an unusual S0 galaxy with narrow, luminous, very blue inner and outer resonance rings along with a strong bar and likely intrinsic outer-disk elongation. Its dwarf companion at DeltaX=30 kpc and DeltaV<=30 km/sec is also bright blue. We investigate the possibility of nested nuclear resonance structure and/or LLAGN activity. We perform stellar population analysis of ugriz photometry and VIRUS IFU spectroscopy to test the hypothesis of coeval interaction-triggered starbursts in both systems across a wide range of scales. 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 a pseudobulge S0 or later type galaxy.
This research was partially supported by an NSF Astronomy & Astrophysics Postdoctoral Fellowship to S.J.K. under award AST-0401547.
Kannappan Sheila J.
Scarborough Tara
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