The structure and dynamics of ringed galaxies. III - Surface photometry and kinematics of the ringed nonbarred spiral NGC 7531

Details The structure and dynamics of ringed galaxies. III - Surface photometry and kinematics of the ringed nonbarred spiral NGC 7531 The structure and dynamics of ringed galaxies. III - Surface photometry and kinematics of the ringed nonbarred spiral NGC 7531

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apjs...64....1b&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 64, May 1987, p. 1-37.

Astronomy and Astrophysics

Astrophysics

32

Astronomical Photometry, Celestial Mechanics, Galactic Structure, Spiral Galaxies, Astronomical Models, Astronomical Spectroscopy, H Ii Regions, Kinematic Equations, Luminosity

Scientific paper

The photometric and kinematic properties of the southern galaxy NGC 7531, a large example of a nonbarred spiral possessing a very bright inner ring, are explored via UVBRI surface photometry and emission-line spectroscopy. The galaxy is a global, two-armed spiral galaxy possessing a bright inner ring with a radius of 2.3 kpc. The ring has an average surface brightness in blue light of four to six times higher than in NGC 1433, and is 2.5 times smaller in size. The ring is a zone of active star formation and H II region concentration. The light distribution within NGC 7531 cannot be modelled in terms of a simple combination of an r exp 1/4 spheroid, exponential disk, and ring. A Fourier analysis suggests that the 'intermediate zone' between the inner ring and the outer arms is intrinsically oval with a phase of about 100 deg with respect to the line of nodes in the galaxy plane.

Affiliated with

Also associated with

No associations

Rating

The structure and dynamics of ringed galaxies. III - Surface photometry and kinematics of the ringed nonbarred spiral NGC 7531 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 structure and dynamics of ringed galaxies. III - Surface photometry and kinematics of the ringed nonbarred spiral NGC 7531, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The structure and dynamics of ringed galaxies. III - Surface photometry and kinematics of the ringed nonbarred spiral NGC 7531 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-857175