Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....94.1519c&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 94, Dec. 1987, p. 1519-1537. Research supported by the Universita di Padova, CNRS, a
Astronomy and Astrophysics
Astronomy
64
Astronomical Maps, Astronomical Photography, Astronomical Photometry, Charge Coupled Devices, Galactic Structure, Data Reduction, Disk Galaxies, Elliptical Galaxies
Scientific paper
Photographic and CCD images in B light are used to map the edge-on S0 galaxy NGC 3115, and photometric and geometric standard parameters are derived, including a value for the total magnitude of 9.75. The galaxy image is decomposed into a spheroid and a disk, with the spheroid being modeled using the minor-axis light profile and assuming purely elliptical isophotes. The disk image shows some structure similar to that of a spiral arm system and a certain degree of asymmetry suggesting an inclinaton of 86 deg. Unlike spirals, the cross sections perpendicular to the disk have parabolic light profiles with an apparent scale height increasing with distance from the galaxy center. A ratio of the disk luminosity to the total luminosity of the galaxy of only 0.06 is found.
Capaccioli Massimo
Held Enrico V.
Nieto Jean-Luc
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