Spectroscopic observations of superthin galaxies

Details Spectroscopic observations of superthin galaxies Spectroscopic observations of superthin galaxies

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...250...79g&link_type=abstract

Astrophysical Journal, Part 1, vol. 250, Nov. 1, 1981, p. 79-86.

Astronomy and Astrophysics

Astrophysics

68

Abundance, Astronomical Spectroscopy, Disk Galaxies, Galactic Structure, Spiral Galaxies, Galactic Rotation, Hydrogen Atoms, Luminous Intensity, Nitrogen, Shock Waves

Scientific paper

Spectroscopic observations of the superthin galaxies UGC 4278, 7170, 7321, and 9242 with 4 and 2.1 m telescopes, are reported to demonstrate how the morphology, kinematics and line ratios of a superthin galaxy may be interrelated. Comparisons are also made with two related edge-on systems. The superthin galaxies are characterized by modest central velocity gradients, an underabundance of nitrogen, and very thin disks with little evidence of a central luminosity concentration. The mean H I content is roughly 10% of the estimated match, which is a value close to the mean for late-type Sd spirals, and large-scale galactic shocks may be nonexistent in the disks due to the modest central concentration of mass.

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