Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-12-15
Mon.Not.Roy.Astron.Soc.377:507-515,2007
Astronomy and Astrophysics
Astrophysics
22 pages, 12 figures
Scientific paper
10.1111/j.1365-2966.2007.11637.x
We find a new Tully-Fisher-like relation for spiral galaxies holding at different galactocentric radii. This Radial Tully-Fisher (RTF) relation allows us to investigate the distribution of matter in the optical regions of spiral galaxies. This relation, applied to three different samples of rotation curves of spiral galaxies, directly proves that: 1) the rotation velocity of spirals is a good measure of their gravitational potential and both the RC's amplitudes and profiles are well predicted by galaxy luminosity 2) the existence of a dark component, less concentrated than the luminous one, and 3) a scaling law, according to which, inside the disk optical size: $ M_{dark}/M_{lum} = 0.5 (L_B/10^{11}L_{B\odot})^{-0.7}$.
Salucci Paolo
Yegorova Irina A.
No associations
LandOfFree
The Radial Tully-Fisher relation for spiral galaxies I 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 The Radial Tully-Fisher relation for spiral galaxies I, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Radial Tully-Fisher relation for spiral galaxies I will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-132237