Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...265..643h&link_type=abstract
Astrophysical Journal, Part 1, vol. 265, Feb. 15, 1983, p. 643-647.
Astronomy and Astrophysics
Astronomy
56
Astronomical Photometry, Galactic Structure, Infrared Astronomy, Spiral Galaxies, Ubv Spectra, Astronomical Maps, Brightness, Ultraviolet Photometry, Visual Photometry
Scientific paper
J, H, and K IR maps, U, B, and I photographs, and photoelectric UBVRiJHK measurements, are presented for 15 areas in the central part of NGC 1566. Although the IR bar shown by the H (1.6 micron) map is invisible in the UV and only slightly visible in the blue, it is found to produce azimuthal brightness variations (of up to + or - 25% around the mean level) in H which may reflect similar variations in the surface mass density. The exceptionally red color of the bar approximately matches that of an empirical galaxy of M(V) = about -20. The strong spiral pattern also seen in H is presumably related to the presence of the IR bar.
Hackwell John A.
Schweizer Francois
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