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2001MNRAS.326..543G - Mon. Not. R. Astron. Soc., 326, 543-552 (2001/September-2)
A K-band central disc surface brightness correlation with scalelength for early-type disc galaxies, and the inclination correction.
GRAHAM A.W.
Abstract (from CDS):
With a subsample of 59 low-inclination (i≤50°) and 29 high-inclination (i≥50°) galaxies having morphological types ranging from S0 to Sc, the need for an inclination correction to the K-band disc surface brightness is demonstrated. Certain selection criteria biases which have troubled previous surface brightness inclination tests (for example, whether the galaxies are selected from a magnitude- or diameter-limited sample) do not operate in the µ0,K-logh diagram. Measured central disc surface brightnesses are found to be significantly (>5σ) brighter for the high-inclination disc galaxies than for the low-inclination disc galaxies. With no surface brightness inclination correction or allowance for the trend between µ0,K and logh, the standard deviation to the distribution of µ0,K values is ∼1mag.arcsec–2, while the standard deviation about the mean µ0,K-logh relation decreases from 0.69mag.arcsec–2, when no inclination correction is applied, to 0.47mag.arcsec–2 when the inclination correction is applied. Possible changes to the disc scalelength with inclination, as a result of radial gradients in the disc opacity, have been explored. The maximum possible sizes for such corrections are too small to provide a valid explanation for the difference between the low- and high-inclination disc galaxies in the µ0,K-logh diagram.
Abstract Copyright: The Royal Astronomical Society
Journal keyword(s): dust, extinction - galaxies: fundamental parameters - galaxies: photometry - galaxies: spiral - galaxies: structure - infrared: galaxies
Simbad objects: 3
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