229 citations · 232 across the 9 of their papers we have counts for
15 papers · 1 filter
Using the Tremaine-Weinberg method to measure pattern speeds from Hαvelocity maps
John Beckman, Kambiz Fathi, Nuria Piñol +3
The Tremaine-Weinberg method is a well-known model independent technique for measuring density wave pattern speeds in spiral galaxies. Here we show how it can be applied to the dat…
Where have all the bulges gone?
Leonel Gutierrez, Antti Tamm, John Beckman +3
Several recent studies indicate that bulges are more complex than merely structureless relaxed stellar systems. We study the HST images of a sample of 130 nearby early type (S0-Sab…
Evolution of stellar disk truncations since z=1
Ignacio Trujillo, Ruyman Azzollini, Judit Bakos +2
We present our recent results on the cosmic evolution of the outskirst of disk galaxies. In particular we focus on disk-like galaxies with stellar disk truncations. Using UDF, GOOD…
GH FaS : Galaxy H-alpha Fabry-Perot System for the WHT
O. Hernandez, K. Fathi, C. Carignan +11
GHFaS a new Fabry-Perot system, is now available at the William Herschel Telescope. It was mounted, for the first time, at the Nasmyth focus of the 4.2 meter WHT on La Palma in…
Trends for Outer Disk Profiles
Peter Erwin, Michael Pohlen, Leonel Gutierrez +1
The surface-brightness profiles of galaxy disks fall into three main classes, based on whether they are simple exponentials (Type I), bend down at large radii (Type II, "truncation…
The Outer Disks of Early-Type Galaxies. I. Surface-Brightness Profiles of Barred Galaxies
Peter Erwin, Michael Pohlen, John E. Beckman
We present a study of 66 barred, early-type (S0-Sb) disk galaxies, focused on the disk surface brightness profile outside the bar region and the nature of Freeman Type I and II pro…