Dynamical Modeling Of SHIELD Galaxies: AGC 749237

Details Dynamical Modeling Of SHIELD Galaxies: AGC 749237 Dynamical Modeling Of SHIELD Galaxies: AGC 749237

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924403t&link_type=abstract

American Astronomical Society, AAS Meeting #219, #244.03

Astronomy and Astrophysics

Astronomy

Scientific paper

The "Survey of HI in Extremely Low-mass Dwarfs” is a systematic exploration of the neutral gas contents and dynamics of 12 ALFALFA-selected galaxies with HI masses between 106 and 107 solar masses. AGC 749237 is amenable to in-depth dynamical analysis using high spectral resolution (0.83 km s-1 ch-1) EVLA B and C configuration observations. Tilted ring analysis in GIPSY is performed at three spatial resolutions ( 81.5 pc, 163 pc, and 326 pc). While the small-scale kinematics indicate some non-circular motions, the extracted rotation curve flattens at 28±3 km s-1 at radii between 81.5 and 620.5 pc. From this we infer a total dynamical mass of (1.1±0.2)x108 solar masses.

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