7 papers
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…
Three Types of Galaxy Disks
M. Pohlen, P. Erwin, I. Trujillo +1
We present our new scheme for the classification of radial stellar surface brightness profiles for disk galaxies. We summarize the current theoretical attempts to understand their…
The Outer Structure of Galactic Disks: Connections Between Bars, Disks, and Environments
Peter Erwin, Michael Pohlen, John E. Beckman +2
Surface-brightness profiles for early-type (S0-Sb) disks exhibit three main classes (Type I, II, and III). Type II profiles are more common in barred galaxies, and most of the time…