170 citations · 561 across the 13 of their papers we have counts for
13 papers
The Building of Galactic Disks: Insights from the Triangulum Spiral Galaxy Messier 33
D. L. Block, I. Puerari, G. G. Fazio +10
The Triangulum Spiral Galaxy Messier 33 offers unique insights into the building of a galactic disk. We identify spectacular arcs of intermediate age (0.6 Gyr - 2 Gyr) stars in the…
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…
How Barred is the NIR Nearby Universe? An analysis using 2MASS
K. Menendez-Delmestre, K. Sheth, N. Scoville +4
We determine a firm lower limit to the bar fraction of 0.58 in the nearby universe using J+H+Ks-band images for 134 spirals from 2MASS. With a mean deprojected semi-major axis of 5…
Using Bars As Signposts of Galaxy Evolution at High and Low Redshifts
K. Sheth, K. Menendez-Delmestre, N. Scoville +5
An analysis of the NICMOS Deep Field shows that there is no evidence of a decline in the bar fraction beyond z~0.7, as previously claimed; both bandshifting and spatial resolution…
Dust penetrated arm classes: insight from rising and falling rotation curves
Marc S. Seigar, David L. Block, Ivanio Puerari
We present near-infrared K-band images of 15 galaxies. We have performed a Fourier analysis on the spiral structure of these galaxies in order to determine their pitch angles and d…
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…