Confirmation of an End-On Bar in NGC-6503

Details Confirmation of an End-On Bar in NGC-6503 Confirmation of an End-On Bar in NGC-6503

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010noao.prop..408f&link_type=abstract

NOAO Proposal ID #2010A-0408

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The nearby isolated galaxy NGC 6503 features several characteristics that suggest the possible presence of a strong bar. These include a star-forming inner ring, circumnuclear disk, central stellar velocity dispersion decrease (σ-drop), and a surface brightness profile with a quasi-exponential central peak followed by a plateau at moderate radii. In Freeland et al. (2009, submitted) we propose the existence of a strong end-on bar in NGC 6503 as an explanation for these observables. Bureau & Athanassoula (2005) demonstrate through simulations that a strong end-on bar in a highly inclined galaxy such as NGC 6503 (incl. 74 degrees) would be hidden from view morphologically (appearing as a round bulge), but should show a strong ``double-humped'' signature in its stellar rotation curve. We propose long-slit spectroscopic observations along the major axis of the NGC 6503 to determine stellar kinematics and search for the signature of a strong end-on bar.

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