133 citations · 133 across the 1 of their papers we have counts for
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An almost head-on collision as the origin of two off-centre rings in the Andromeda galaxy
D. L. Block, F. Bournaud, F. Combes +6
The unusual morphology of the Andromeda Spiral (Messier 31, the closest spiral galaxy to the Milky Way) has long been an enigma. Although regarded for decades as showing little evi…
Gravitational bar and spiral arm torques from K_s-band observations and implications for the pattern speeds
D. L. Block, R. Buta, J. H. Knapen +3
We have obtained deep near-infrared K_s-band William Herschel Telescope observations of a sample of 15 nearby spiral galaxies having a range of Hubble types and apparent bar streng…
A Technique for Separating the Gravitational Torques of Bars and Spirals in Disk Galaxies
R. Buta, D. L. Block, J. H. Knapen
We describe a Fourier-based method of separating bars from spirals in near-infrared images. The method takes advantage of the fact that a bar is typically a feature with a relative…
The detection of spiral arm modulation in the mass distribution of an optically flocculent galaxy
Ivanio Puerari, David L. Block, Bruce G. Elmegreen +2
Spiral arm modulation in NGC 4062 (an optical flocculent) is detected for the first time; the Fourier spectra of NGC 4062 and NGC 5248 (a classic grand design in optical images) ar…