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First Data Release of the COSMOS Lyman-Alpha Mapping And Tomography Observations: 3D Lyman- Forest Tomography at 2.05 < z < 2.55
Khee-Gan Lee, Alex Krolewski, Martin White +21
Faint star-forming galaxies at can be used as alternative background sources to probe the Lyman- forest in addition to quasars, yielding high sightline densities tha…
Shadow of a Colossus: A z=2.45 Galaxy Protocluster Detected in 3D Ly-a Forest Tomographic Mapping of the COSMOS Field
Khee-Gan Lee, Joseph F. Hennawi, Martin White +10
Using moderate-resolution optical spectra from 58 background Lyman-break galaxies and quasars at within a area of the COSMOS field ($\sim 1200\,\ma…
The masses of Local Group dwarf spheroidal galaxies: The death of the universal mass profile
Michelle L. M. Collins, Scott C. Chapman, R. M. Rich +12
We investigate the claim that all dwarf spheroidal galaxies (dSphs) reside within halos that share a common, universal mass profile as has been derived for dSphs of the Galaxy. By…
A kinematic study of the Andromeda dwarf spheroidal system
Michelle L. M. Collins, Scott C. Chapman, R. Michael Rich +12
We present a homogeneous kinematic analysis of red giant branch stars within 18 of the 28 Andromeda dwarf spheroidal (dSph) galaxies, obtained using the Keck I LRIS and Keck II DEI…
Galaxy-scale Star Formation on the Red Sequence: the Continued Growth of S0s and the Quiescence of Ellipticals
Samir Salim, Jerome J. Fang, R. Michael Rich +2
This paper examines star formation (SF) in relatively massive, primarily early-type galaxies (ETGs) at z~0.1. A sample is drawn from bulge-dominated GALEX/SDSS galaxies on the opti…
The Recent Stellar Archeology of M31 - The Nearest Red Disk Galaxy
T. J. Davidge, A. W. McConnachie, M. A. Fardal +5
We examine the star-forming history (SFH) of the M31 disk during the past few hundred Myr. The luminosity functions (LFs) of main sequence stars at distances R_GC > 21 kpc (i.e. >…
Andromeda and its satellites - a kinematic perspective
Michelle L. M. Collins, R. Michael Rich, Scott C. Chapman
Using spectroscopic data taken with Keck II DEIMOS by the Z-PAndAS team in the Andromeda-Triangulum region, I present a comparison of the disc and satellite systems of Andromeda wi…
The Space Density of Extended Ultraviolet (XUV) Disks in the Local Universe and Implications for Gas Accretion on to Galaxies
Jenna J. Lemonias, David Schiminovich, David Thilker +8
We present results of the first unbiased search for extended UV (XUV)-disk galaxies undertaken to determine the space density of such galaxies. Our sample contains 561 local (0.001…
Star cluster formation and evolution in Mrk 930: properties of a metal-poor starburst
A. Adamo, G. Ostlin, E. Zackrisson +4
We present a HST multiband analysis of the large population of star clusters in the blue compact galaxy (BCG) Mrk 930. We have reconstructed the spectral energy distributions of th…
Broad-Line Reverberation in the Kepler-Field Seyfert Galaxy Zw 229-015
A. J. Barth, M. L. Nguyen, M. A. Malkan +45
The Seyfert 1 galaxy Zw 229-015 is among the brightest active galaxies being monitored by the Kepler mission. In order to determine the black hole mass in Zw 229-015 from H-beta re…
The scatter about the "Universal" dwarf spheroidal mass profile: A kinematic study of the M31 satellites, And V and And VI
M. L. M. Collins, S. C. Chapman, R. M. Rich +9
While the satellites of the Milky Way (MW) have been shown to be largely consistent in terms of their mass contained within one half--light radius (M_{half}) with a "Universal" mas…
PAndAS' progeny: extending the M31 dwarf galaxy cabal
Jenny C. Richardson, Mike Irwin, Alan W. McConnachie +8
We present the discovery of five new dwarf galaxies, Andromeda XXIII-XXVII, located in the outer halo of M31. These galaxies were found in the second year of data from the Pan-Andr…
Dust Attenuation in UV-selected Starbursts at High Redshift and their Local Counterparts: Implications for the Cosmic Star Formation Rate Density
Roderik Overzier, Tim Heckman, Jing Wang +14
We present a new analysis of the dust obscuration in starburst galaxies at low and high redshift. This study is motivated by our unique sample of the most extreme UV-selected starb…
The kinematic identification of a thick stellar disc in M31
M. L. M. Collins, S. C. Chapman, R. A. Ibata +6
We present the first characterization of a thick disc component in the Andromeda galaxy (M31) using kinematic data from the DEIMOS multi-object spectrograph instrument on Keck II.…
The kinematics of ionized gas in Lyman-Break Analogs at z ~ 0.2
Thiago S. Gonçalves, Antara Basu-Zych, Roderik Overzier +7
We present results for 19 "Lyman Break Analogs" (LBAs) observed with Keck/OSIRIS with an AO-assisted spatial resolution of less than 200 pc. We detect satellites/companions, diffus…
Our Milky Way as a Pure-Disk Galaxy -- A Challenge for Galaxy Formation
Juntai Shen, R. Michael Rich, John Kormendy +3
Bulges are commonly believed to form in the dynamical violence of galaxy collisions and mergers. Here we model the stellar kinematics of the Bulge Radial Velocity Assay (BRAVA), an…
The UV-Optical Color Dependence of Galaxy Clustering in the Local Universe
Yeong-Shang Loh, R. Michael Rich, Sébastien Heinis +22
We measure the UV-optical color dependence of galaxy clustering in the local universe. Using the clean separation of the red and blue sequences made possible by the NUV - r color-m…
Star Formation Signatures in Optically Quiescent Early-type Galaxies
Samir Salim, R. Michael Rich
In recent years argument has been made that a high fraction of early-type galaxies in the local universe experience low levels (< 1 M_sun/yr) of star formation (SF) that causes str…
A statistical analysis of the late-type stellar content in the Andromeda halo
Andreas Koch, R. Michael Rich
We present a statistical characterization of the carbon-star to M-giant (C/M) ratio in the halo of M31. Based on application of pseudo-filter band passes to our Keck/DEIMOS spectra…
Morphologies of local Lyman break galaxy analogs II: A Comparison with galaxies at z=2-4 in ACS and WFC3 images of the Hubble Ultra Deep Field
R. A. Overzier, T. M. Heckman, D. Schiminovich +4
Lyman break galaxies (LBGs) display a range in structures (from single/compact to clumpy/extended) that is different from typical local star-forming galaxies. Recently, we have int…
The Local Hosts of Type Ia Supernovae
James D. Neill, Mark Sullivan, D. Andy Howell +18
We use multi-wavelength, matched aperture, integrated photometry from GALEX, SDSS and the RC3 to estimate the physical properties of 166 nearby galaxies hosting 168 well-observed T…
Probing the Intermediate-Age Globular Clusters in NGC 5128 from Ultraviolet Observations
Soo-Chang Rey, Sangmo T. Sohn, Michael A. Beasley +23
We explore the age distribution of the globular cluster (GC) system of the nearby elliptical galaxy NGC 5128 using ultraviolet (UV) photometry from Galaxy Evolution Explorer (GALEX…