Mass Determination in the Late-Type Spiral NGC 5457

Details Mass Determination in the Late-Type Spiral NGC 5457 Mass Determination in the Late-Type Spiral NGC 5457

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..220..321p&link_type=abstract

International Astronomical Union Symposium no. 220, held 21 - 25 July, 2003 in Sydney, Australia. Eds: S. D. Ryder, D. J. Pisano

Astronomy and Astrophysics

Astronomy

Scientific paper

We have performed a kinematical and dynamical analysis of the ionized gas content of the late-type spiral NGC 5457 (M101) by means of scanning Fabry-Perot interferometry. The purpose of this study is to gain insight into the dark matter content in this galaxy. A sample of 263 HII regions were catalogued. We calculated radial velocity and velocity dispersions. From the dynamics of the ionized gas we were able to infer a mass of 9.8×1010 M&sun; inside a radius of 4.8' (or 10 kpc).

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