The stellar velocity dispersion in the disk of the spiral galaxy NGC 5170

Details The stellar velocity dispersion in the disk of the spiral galaxy NGC 5170 The stellar velocity dispersion in the disk of the spiral galaxy NGC 5170

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...178...77b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 178, no. 1-2, May 1987, p. 77-90.

Astronomy and Astrophysics

Astrophysics

35

Radial Velocity, Spiral Galaxies, Stellar Motions, Velocity Distribution, Absorption Spectra, Astronomical Maps, Hydrogen Atoms, Line Spectra, Mass To Light Ratios

Scientific paper

Optical long-slit absorption-line spectra together with H I synthesis observations of the edge-on spiral galaxy NGC 5170 are presented. From these data the optical and radio rotation curves are determined as well as the stellar velocity dispersion as function of radius for the inner parts of the galaxy. Two methods are used to determine the actual stellar velocity disperion in this galaxy: one is to compare both rotation curves; the resulting asymmetrical drift can be used to calculate the dispersion. The second is a direct comparison between the observed and an assumed velocity dispersion for a model galaxy. The resulting velocity dispersion in the radial direction is 75 + or - 13 km/s at a radius of 0.8 times the photometric scale-length. This is about 35 percent of the value of the rational velocity at that radius. Preliminary photometry suggests an M/L ratio for the old disk population of 12 + or - 4 for Q = 2, or Q = 4 + or - 1.5 for M/L = 6.

Affiliated with

Also associated with

No associations

Rating

The stellar velocity dispersion in the disk of the spiral galaxy NGC 5170 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 stellar velocity dispersion in the disk of the spiral galaxy NGC 5170, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The stellar velocity dispersion in the disk of the spiral galaxy NGC 5170 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-856137