Structure of S0 galaxies in the central regions of the Fornax cluster

Details Structure of S0 galaxies in the central regions of the Fornax cluster Structure of S0 galaxies in the central regions of the Fornax cluster

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...149..449d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 149, no. 2, Aug. 1985, p. 449-458.

Astronomy and Astrophysics

Astronomy

7

Astronomical Photometry, Disk Galaxies, Galactic Clusters, Galactic Structure, Astronomical Photography, Brightness Distribution, Isophotes, Lenticular Bodies, Luminosity, Sky Surveys (Astronomy)

Scientific paper

Surface photometry observations are presented of S0 galaxies located in the central regions of the nearby Fornax cluster of galaxies. The two-dimensional brightness distribution of the program galaxies were obtained using high-resolution plates, taken at the 60-in. telescope of the Observatorio Nacional (ON), to observe the details of the light distribution near the center, and were extended to low surface brightness values using the ESO(B) and ESO/SRC (J) Sky Surveys on film. Comparison with published photoelectric observations suggests that the procedure is sufficiently accurate to justify its use in more extensive surface photometry programs. Standard decomposition techniques have been applied to analyse the major-axis profiles of the sample galaxies, deriving the structural parameters for each separate component. An important result of this analysis was to find examples of galaxies with very faint and diffuse disks. It is suggested that this may be a general characteristic of disks in high galactic density regions and it is perhaps the primary cause for the correlation between the bulge-to-disk luminosity ratio and galactic density observed by Dressler (1980) for disk galaxies.

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