Surface photometry and mass distributions of the interacting spiral galaxies NGC 5426 and 5427

Details Surface photometry and mass distributions of the interacting spiral galaxies NGC 5426 and 5427 Surface photometry and mass distributions of the interacting spiral galaxies NGC 5426 and 5427

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.200..407b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 200, Aug. 1982, p. 407-429.

Astronomy and Astrophysics

Astronomy

30

Astronomical Photometry, Galactic Rotation, Interacting Galaxies, Mass Distribution, Spiral Galaxies, Angular Velocity, Data Reduction, Emission Spectra, Galactic Nuclei, Galactic Structure, Line Spectra, Luminosity

Scientific paper

A series of long slit (45-180 arcsec) spectrograms of NGC 5426 and 5427 were obtained using various telescopes and spectrographs. Both galaxies have flat rotation curves outside the nucleus and neither has any large scale circular motions. The masses are 3.5 x 10 to the 10th solar masses for NGC 5426 (radius of less than 8 kpc) and 2.9 x 10 to the 10th solar masses for NGC 5427 (radius of less than 9 kpc) for a distance of 26 Mpc. Total B and V magnitudes are 12.5, 11.9 and 12.1, 11.6 for NGC 5426 and 5427, respectively. The luminosity profile of NGC 5426 contains a distinct inner exponential component which is associated with the spiral arms; NGC 5427 has a 'Freeman type II' profile which is also caused by the spiral arms. It is demonstrated that the gross properties of NGC 5426 and 5427 are indistinguishable from those of isolated spirals. In particular, the existence of an inner exponential component in the luminosity profile of NHC 5426 is similar to the findings for the isolated galaxies NGC 157, 972, 1084, 5005, and 7331.

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