A Morphological Method to Determine Co-Rotation Radii in Spiral Galaxies

Details A Morphological Method to Determine Co-Rotation Radii in Spiral Galaxies A Morphological Method to Determine Co-Rotation Radii in Spiral Galaxies

1996-11-20

arxiv.org/abs/astro-ph/9611150v1

Astronomy and Astrophysics

Astrophysics

9 pages, accepted for publication in ApJL, figures 4 and 6 avaliables at ftp://ftp.inaoep.mx/pub/salida/puerari, full paper al

Scientific paper

10.1086/310502

Shock induced star formation in a stellar density wave scenario produces an azimuthal gradient of ages across the spiral arms which has opposite signs on either side of the corotation resonance (CR). We present a method based on the Fourier analysis of azimuthal profiles, to locate the CR and determine the arm character (trailing or leading) in spiral galaxies. Basically, we compare the behavior of the phase angle of the two-armed spiral in blue and infrared colors which pick out respectively young and older disk stellar population. We illustrate the method using theoretical leading and trailing, spirals. We have also applied the method to the spiral galaxies NGC 7479, for which we confirm the reported leading arms, and NGC 1832. In these galaxies we find two and three CRs respectively.

Affiliated with

Also associated with

No associations

Rating

A Morphological Method to Determine Co-Rotation Radii in 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 A Morphological Method to Determine Co-Rotation Radii in Spiral Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Morphological Method to Determine Co-Rotation Radii in Spiral Galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-310189