The Nature of Inner-truncated Spiral Galaxy Disks

Details The Nature of Inner-truncated Spiral Galaxy Disks The Nature of Inner-truncated Spiral Galaxy Disks

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...180.4902b&link_type=abstract

American Astronomical Society, 180th AAS Meeting, #49.02; Bulletin of the American Astronomical Society, Vol. 24, p.808

Astronomy and Astrophysics

Astronomy

Scientific paper

Freeman (1970, Ap.J., 160, p. 811) defined a Type II spiral galaxy brightness profile as one in which the inward extrapolation of the disk brightness distribution at some point becomes brighter than the observed brightness profile; this indicates a lack of disk light at small radii. There are three possible mechanisms to explain such behavior: 1) no stars were formed near the center of the disk, 2) stars have been removed from the center of the disk, or 3) the stars are present but cannot be seen. As a first step toward sorting between these hypotheses, we have collected an inhomogeneous sample of 167 brightness profiles from the literature and used it to determine how frequently these disk types occur. We classified each brightness profile as to the disk type based on a visual inspection of the published profile, except those from Freeman (1970), whose classifications were accepted without question. The initial results of our study will be presented, with some interpretation as to the relationship with the three hypotheses on the origin of such disks. Our study will be continued by the specification of a better-defined galaxy sample and a homogeneous source of brightness profiles. In addition, we are locating rotation curves for as many galaxies as possible to check for correlations with rotation curve characteristics.

Affiliated with

Also associated with

No associations

Rating

The Nature of Inner-truncated Spiral Galaxy Disks 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 Nature of Inner-truncated Spiral Galaxy Disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Nature of Inner-truncated Spiral Galaxy Disks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1513313