Color gradients in the disks of late-type spiral galaxies

Details Color gradients in the disks of late-type spiral galaxies Color gradients in the disks of late-type spiral galaxies

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005pabei..23..371l&link_type=abstract

Progress in Astronomy (ISSN 1000-8349), Vol. 23, No. 4, p. 371 - 378 (2005)

Astronomy and Astrophysics

Astrophysics

2

Astrophysics, Color Gradient, Spiral Galaxy, Disk

Scientific paper

Based on 395 late-type spiral galaxies brighter than 15 mag in r-band that selected from Data Release Two of Sloan Digital Sky Survey, we decompose their bulges and disks through one-dimensional fitting of the surface brightness profile, and statistically analyze the color gradients in their disks. We fit the color gradients by the forms of Δ c/Δ R and Δ c/Δ lg R separately. It can be found that the gradients in the colors of r-z and g-z are roughly constant in Δ c/Δ R, while g-r favors the form of Δ c/Δ lg R. The values of color gradients are: Δ (g-r)/Δ lg R = -0.152±0.010, Δ (r-z)/Δ lg R = -0.377±0.019, Δ (g-z)/Δ lg R = -0.590±0.026, which are in good agreement with previous results.

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