RR Lyrae Variables in M32 and the Disk of M31 (2010)
Fiorentino, Giuliana, Monachesi, Antonela, Trager, Scott C., Lauer, Tod R., Saha, Abhijit, Mighell, Kenneth J., ...
We observed two fields near M32 with the Advanced Camera for Surveys/High Resolution Channel (ACS/HRC) on board the Hubble Space Telescope. The main field, F1, is 1.'8 from the center of M32; the...
RR Lyrae variables in M32 and the disk of M31 (2009)
Fiorentino, Giuliana, Monachesi, Antonela, Trager, Scott C., Lauer, Tod R., Saha, Abhijit, Mighell, Kenneth J., ...
We observed two fields near M32 with the Advanced Camera for Surveys/High Resolution Channel (ACS/HRC) on board the Hubble Space Telescope (HST). The main field, F1, is 1.8 arcmin from the center of...
Arrigoni, Matías, Trager, Scott C., Somerville, Rachel S., Gibson, Brad K.
We study the metallicities and abundance ratios of early-type galaxies in cosmological semi-analytic models (SAMs) within the hierarchical galaxy formation paradigm. To achieve this we implemented a...
Stellar populations, neutral hydrogen and ionised gas in field early-type galaxies (2007)
Serra, Paolo, Trager, Scott C., Oosterloo, Tom A., Morganti, Raffaella
We present a study of the stellar populations of a sample of 39 local, field early-type galaxies whose HI properties are known from interferometric data. Our aim is to understand whether stellar age...
The New Standard Stellar Population Models (NSSPM) -- The Prologue (2007)
Lee, Hyun-chul, Worthey, Guy, Trager, Scott C., Dotter, Aaron, Chaboyer, Brian, Ferguson, Jason W., ...
We are developing a brand new stellar population models with flexible chemistry (isochrones plus stellar colors and spectra) in order to set a new standard of completeness and excellence. Here we...
Serra, Paolo, Trager, Scott C.
We study the simple-stellar-population-equivalent (SSP-equivalent) age and chemical composition measured from the Lick/IDS line-strength indices of composite stellar populations (CSP). We build two...
Lee, Hyun-chul, Worthey, Guy, Trager, Scott C., Faber, Sandra M.
In integrated-light, some color-color diagrams that use optical and near-infrared photometry show surprisingly orthogonal grids as age and metallicity are varied, and they are coming into common...
An Unexpectedly High AGN Fraction in Red Cluster Galaxies (2002)
Martini, Paul, Kelson, Daniel D., Mulchaey, John S., Trager, Scott C.
As part of a program to study the evolution of active galactic nuclei (AGN) in clusters of galaxies, we present our results for Abell 2104. A deep Chandra observation of this massive, z = 0.154...