V-R diagram for spiral galaxies - New insights into the Hubble sequence

Bibcode
1989Ap&SS.157..321P
DOI
10.1007/BF00637348
Prieto, M.; Campos-Aguilar, A.; Garcia, C.
Referencia bibliográfica

Instituto de Astrofisica de Canarias and Comision Interministerial de Ciencia y Tecnologia, Summer School on Evolutionary Phenomena in Galaxies, Puerto de la Cruz, Spain, July 4-15, 1988 Astrophysics and Space Science (ISSN 0004-640X), vol. 157, no. 1-2, July 1989, p. 321-329.

Fecha de publicación:
7
1989
Número de autores
3
Número de autores del IAC
0
Número de citas
7
Número de citas referidas
6
Descripción
The present examination of the relation between the global parameters of spiral galaxies and their morphological type represents rotational velocity V at 25 mag/sq arcsec radius against this radius R for a 56-galaxy sample. Isolines of total mass, angular momentum, and mean surface density, plotted above the V-R diagram for isolated galaxies with circular motion in centrifugal equilibrium, indicate that morphological type is represented by mean surface density, V-squared/R. Taking V-squared/R as representative of morphological type, the empirical Tully-Fisher relation and the dependence of the slope and the zero point on the morphological type can be theoretically deduced. For every galaxy morphological type, there is a critical mass above which a dynamical behavior change occurs.
Tipo
Sin árbitro
Diagrama de Hubble
Galaxias espirales

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