A kinematical study of the Giant H II Regions in NGC 4449

Bibcode
2001RMxAC..10...34F
Fuentes-Masip, O.; Muñoz-Tuñon, C.; Castañeda, H. O.; Tenorio-Tagle, G.
Referencia bibliográfica

The Seventh Texas-Mexico Conference on Astrophysics: Flows, Blows and Glows (Eds. William H. Lee and Silvia Torres-Peimbert) Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias) Vol. 10, pp. 34-37 (2001)

Fecha de publicación:
3
2001
Número de autores
4
Número de autores del IAC
0
Número de citas
0
Número de citas referidas
0
Descripción
We present the results of a kinematical study of the H II regions in the central area of the giant irregular galaxy NGC 4449. A new method is defined to determine the sizes of the regions. We obtained the integrated parameters of the H II regions: radius, luminosity, radial velocity and velocity dispersion. We define the size and luminosity vs. velocity dispersion empirical correlations for the giant H II regions in the galaxy, and show that the correlations only hold for nebulae with surface brightness higher than 2×1035 erg s-1 pc-2 in H α and with a supersonic single line Gaussian profile. The exponent of the fits are consistent with virial mechanisms.
Tipo
Sin árbitro
Galaxias

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