Benjamin J Weiner

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We analyze star formation (SF) as a function of stellar mass (M ⋆) and redshift z in the All Wavelength Extended Groth Strip International Survey (AEGIS). For 2905 field galaxies, complete to 10 10 (10 10.8)M ⊙ at z < 0.7(1), with Keck spectroscopic redshifts out to z = 1.1, we compile SF rates (SFR) from emission lines, GALEX, and Spitzer MIPS 24µm(More)
The quantitative morphological classification of distant galaxies is essential to the understanding of the evolution of galaxies over the history of the Universe. This paper presents Hubble Space Telescope WFPC2 F 606W and F 814W photometric structural parameters for 7450 galaxies in the " Groth Strip. " These parameters are based on a two-dimensional(More)
  • Christopher P Ahn, Rachael Alexandroff, Carlos Allende Prieto, Friedrich Anders, Scott F Anderson, Timothy Anderton +85 others
  • 2014
The Sloan Digital Sky Survey (SDSS) has been in operation since 2000 April. This paper presents the tenth public data release (DR10) from its current incarnation, SDSS-III. This data release includes the first spectroscopic data from the Apache Point Observatory Galaxy Evolution Experiment (APOGEE), along with spectroscopic data from the Baryon Oscillation(More)
We present a Principal Component Analysis (PCA)-based spectral classification, η, for the first 5600 galaxies observed in the DEEP2 Redshift Survey. This parameter provides a very pronounced separation between absorption and emission dominated galaxy spectra – corresponding to passively evolving and actively star-forming galaxies in the survey respectively.(More)
Stars form from cold molecular interstellar gas. As this is relatively rare in the local Universe, galaxies like the Milky Way form only a few new stars per year. Typical massive galaxies in the distant Universe formed stars an order of magnitude more rapidly. Unless star formation was significantly more efficient, this difference suggests that young(More)
We characterize the mass-dependent evolution in a large sample of more than 8,000 galaxies using spectroscopic redshifts drawn from the DEEP2 Galaxy Redshift Survey in the range 0.4 < z < 1.4 and stellar masses calculated from K-band photometry obtained at Palomar Observatory. This sample spans more than 1.5 square degrees in four independent fields. Using(More)
We have detected faint Hα emission from several points along the Magellanic Stream, using the Rutgers Fabry–Perot Interferometer at the CTIO 1.5-m telescope. The sources of the emission are diffuse; at each observed position, there is no variation in intensity over the 7 ′ field of the Fabry–Perot. At points on the leading edges of the H I clouds MS II, MS(More)
1 Summary Astronomical software is now a fact of daily life for all hands-on members of the astronomy and astrophysics community. Purpose-built software to assist in and automate data reduction and modeling tasks becomes ever more critical as we handle larger amounts of data and simulations and doing steps " by hand " becomes less practical. However, the(More)
The DEEP2 and COMBO-17 surveys are used to study the evolution of the luminosity function of red and blue galaxies to z ∼ 1. Schechter function fits show that, since z = 1, M * B dims by ∼ 1.3 mag per unit redshift for both color classes, φ * of blue galaxies shows little change, while φ * for red galaxies has formally nearly quadrupled. At face value, the(More)
1 Based on observations obtained at the W. M. Keck Observatory, which is operated jointly by the University of California and the California Institute of Technology and on observations made with the NASA/ESA Hubble Space Telescope (HST) obtained from the data Archive at the Space Telescope Science Institute (STScI), which is operated by the Association of(More)