Search Publications
Structure and Formation of Elliptical and Spheroidal Galaxies
Kormendy, John; Bender, Ralf; Fisher, David B. +1 more
New surface photometry of all known elliptical galaxies in the Virgo cluster is combined with published data to derive composite profiles of brightness, ellipticity, position angle, isophote shape, and color over large radius ranges. These provide enough leverage to show that Sérsic log I vprop r 1/n functions fit the brightness profil…
First-Year Sloan Digital Sky Survey-II Supernova Results: Hubble Diagram and Cosmological Parameters
Filippenko, Alexei V.; Pan, Kaike; Schneider, Donald P. +43 more
We present measurements of the Hubble diagram for 103 Type Ia supernovae (SNe) with redshifts 0.04 < z < 0.42, discovered during the first season (Fall 2005) of the Sloan Digital Sky Survey-II (SDSS-II) Supernova Survey. These data fill in the redshift "desert" between low- and high-redshift SN Ia surveys. Within the framework of the MLCS2K2…
The ACS Nearby Galaxy Survey Treasury
de Jong, Roelof S.; Skillman, Evan D.; Williams, Benjamin F. +24 more
The ACS Nearby Galaxy Survey Treasury (ANGST) is a systematic survey to establish a legacy of uniform multi-color photometry of resolved stars for a volume-limited sample of nearby galaxies (D < 4 Mpc). The survey volume encompasses 69 galaxies in diverse environments, including close pairs, small and large groups, filaments, and truly isolated…
Deep U Band and R Imaging of Goods-South: Observations, Data Reduction and First Results
Daddi, E.; Cesarsky, C.; Dickinson, M. +9 more
We present deep imaging in the U band covering an area of 630 arcmin2 centered on the southern field of the Great Observatories Origins Deep Survey (GOODS). The data were obtained with the VIMOS instrument at the European Southern Observatory (ESO) Very Large Telescope. The final images reach a magnitude limit U lim ≈ 29.8 (A…
The ACS Virgo Cluster Survey XVI. Selection Procedure and Catalogs of Globular Cluster Candidates
Jordán, Andrés; Eyheramendy, Susana; Tonry, John L. +6 more
We present catalogs of globular cluster candidates for the 100 galaxies of the Advanced Camera for Surveys Virgo Cluster Survey, a large program to carry out imaging of early-type members of the Virgo Cluster using the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope. We describe the procedure used to select bona fide globular clust…
Observations of Starburst Galaxies With Far-Ultraviolet Spectrographic Explorer: Galactic Feedback in the Local Universe
Leitherer, C.; Calzetti, D.; Meurer, G. +6 more
We have analyzed FUSE (905-1187 Å) spectra of a sample of 16 local starburst galaxies. These galaxies cover almost three orders of magnitude in star-formation rates and over two orders of magnitude in stellar mass. Absorption features from the stars and interstellar medium are observed in all the spectra. The strongest interstellar absorption feat…
Cepheid Calibrations of Modern Type Ia Supernovae: Implications for the Hubble Constant
Ferguson, Henry C.; Casertano, Stefano; Mutchler, Max +10 more
This is the first of two papers reporting measurements from a program to determine the Hubble constant to ~5% precision from a refurbished distance ladder. We present new observations of 110 Cepheid variables in the host galaxies of two recent Type Ia supernovae (SNe Ia), NGC 1309 and NGC 3021, using the Advanced Camera for Surveys on the Hubble S…
Biases and Uncertainties in Physical Parameter Estimates of Lyman Break Galaxies from Broadband Photometry
Ferguson, Henry C.; Giavalisco, Mauro; Somerville, Rachel S. +3 more
We investigate the biases and uncertainties in estimates of physical parameters of high-redshift Lyman break galaxies (LBGs), such as stellar mass, mean stellar population age, and star formation rate (SFR), obtained from broadband photometry. These biases arise from the simplifying assumptions often used in fitting the spectral energy distributio…
Magellan Spectroscopy of Low-Redshift Active Galactic Nuclei
Ho, Luis C.; Kim, Minjin
We present an atlas of moderate-resolution (R ≈ 1200-1600) optical spectra of 94 low-redshift (z lsim 0.5) active galactic nuclei taken with the Magellan 6.5 m Clay Telescope. The spectra mostly cover the rest-frame region ~3600-6000 Å. All the objects have pre-existing Hubble Space Telescope imaging, and they were chosen as part of an ongoing pro…
A Multi-color Optical Survey of the Orion Nebula Cluster. I. The Catalog
Panagia, N.; Robberto, M.; Da Rio, N. +4 more
We present U, B, V, I broadband, 6200 Å TiO mediumband, and Hα narrowband photometry of the Orion Nebula Cluster (ONC) obtained with the WFI imager at the ESO/MPI 2.2 telescope at La Silla Observatory. The nearly simultaneous observations cover the entire ONC in a field of about 34 × 34 arcmin. They enable us to determine stellar colors avoiding t…