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Mass Determination in the Late-Type Spiral NGC 5457

Published online by Cambridge University Press:  26 May 2016

Ivânio Puerari ,
Margarita Valdez-Gutiérrez  and
Margarita Rosado
Ivânio Puerari
Affiliation:
INAOE, Calle Luis Enrique Erro #1, 72840 Tonantzintla, Pue, México
Margarita Valdez-Gutiérrez
Affiliation:
Departamento de Astronomía, Universidad de Guanajuato, Apartado Postal 144, 36000 Guanajuato, Gto, México
Margarita Rosado
Affiliation:
IA-UNAM, Apartado Postal 70-264, Ciudad Universitaria, 04510 México D.F., México

Abstract

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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⊙ inside a radius of 4'8 (or 10 kpc).

Type
Part 9: Disks
Information
Symposium - International Astronomical Union , Volume 220: Dark Matter in Galaxies , 2004 , pp. 321 - 322
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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