Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...179...23a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 179, no. 1-2, June 1987, p. 23-40.
Astronomy and Astrophysics
Astrophysics
169
Galactic Evolution, Galactic Structure, Mass To Light Ratios, Spiral Galaxies, Astronomical Models, Dark Matter, Galactic Rotation, Mass Distribution
Scientific paper
The present analysis of rotation curves for a sample of spiral galaxies whose photometric and kinematical data are available obtains the photometric radial luminosity, in order to calculate a rotation curve due to the luminous mass in a galaxy. The range of possible M/L values is narrowed by introducing spiral structure constraints, thereby restricting the allowed values for the disk to a range of 0.3 dex. The gas fraction in the luminous mass of the models is calculated on the basis of available (C-12)O data, in order to estimate the contribution of molecular hydrogen. It is suggested that all galaxies need a halo in order to fit their rotation curve, and that cases to the contrary are due to the artificially short radius range of the rotation data. The central density of the isothermal sphere correlates with the central disk surface density divided by disk characteristic length.
Athanassoula Evangelia
Bosma Albert
Papaioannou S.
No associations
LandOfFree
Halo parameters of spiral galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Halo parameters of spiral galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Halo parameters of spiral galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1813236