Search Publications
A Catalog of Broad Absorption Line Quasars in Sloan Digital Sky Survey Data Release 5
Brandt, W. N.; Shen, Yue; Hall, Patrick B. +9 more
We present a catalog of 5039 broad absorption line (BAL) quasars (QSOs) in the Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5) QSO catalog that have absorption troughs covering a continuous velocity range >=2000 km s-1. We have fitted ultraviolet (UV) continua and line emission in each case, enabling us to report common diagnost…
GOALS: The Great Observatories All-Sky LIRG Survey
Sturm, E.; Veilleux, S.; Sanders, D. B. +31 more
The Great Observatories All-Sky LIRG Survey (GOALS20 ) combines data from NASA’s Spitzer Space Telescope, Chandra X-Ray Observatory, Hubble Space Telescope (HST), and Galaxy Evolution Explorer (GALEX) observatories, together with ground-based data, into a comprehensive imaging and spectroscopic survey of over 200 low-redshift (z < 0.088), Lumin…
Resolving the mid-infrared cores of local Seyferts
Vignali, C.; Gilli, R.; Comastri, A. +5 more
We present new photometry of 16 local Seyferts including 6 Compton-thick sources in N-band filters around 12-µm, obtained with the VISIR instrument on the 8-m Very Large Telescope. The near-diffraction-limited imaging provides the least-contaminated core fluxes for these sources to date. Augmenting these with our previous observations and wi…
The High Angular Resolution Multiplicity of Massive Stars
Gies, Douglas R.; Henry, Todd J.; Mason, Brian D. +2 more
We present the results of a speckle interferometric survey of Galactic massive stars that complements and expands upon a similar survey made over a decade ago. The speckle observations were made with the Kitt Peak National Observatory and Cerro Tololo Inter-American Observatory 4 m telescopes and USNO speckle camera, and they are sensitive to the …
The Evolutionary History of Lyman Break Galaxies Between Redshift 4 and 6: Observing Successive Generations of Massive Galaxies in Formation
Stark, Daniel P.; Ellis, Richard S.; Bunker, Andrew +4 more
We present new measurements of the evolution in the Lyman break galaxy (LBG) population between z sime 4 and z sime 6. By utilizing the extensive multiwavelength data sets available in the GOODS fields, we identify 2443 B, 506 V, and 137 i'-band dropout galaxies likely to be at z ≈ 4, 5, and 6. For the subset of dropouts for which reliable Spitzer…
Supernova Feedback Efficiency and Mass Loading in the Starburst and Galactic Superwind Exemplar M82
Heckman, Timothy M.; Strickland, David K.
We measure the net energy efficiency of supernova (SN) and stellar wind feedback in the starburst galaxy M82 and the degree of mass loading of the hot gas piston driving its superwind by comparing a large suite of one and two-dimensional hydrodynamical models to a set of observational constraints derived from hard X-ray observations of the starbur…
The Peculiar Solar Composition and Its Possible Relation to Planet Formation
Gustafsson, B.; Yong, D.; Asplund, M. +1 more
We have conducted a differential elemental abundance analysis of unprecedented accuracy (~0.01 dex) of the Sun relative to 11 solar twins from the Hipparcos catalog and 10 solar analogs from planet searches. We find that the Sun shows a characteristic signature with a ≈20% depletion of refractory elements relative to the volatile elements in compa…
Two Bright Submillimeter Galaxies in a z = 4.05 Protocluster in Goods-North, and Accurate Radio-Infrared Photometric Redshifts
Daddi, E.; Elbaz, D.; Morrison, G. +7 more
We present the serendipitous discovery of molecular gas CO emission lines with the IRAM Plateau de Bure interferometer coincident with two luminous submillimeter galaxies (SMGs) in the Great Observatories Origins Deep Survey North (GOODS-N) field. The identification of the millimeter emission lines as CO[4-3] at z = 4.05 is based on the optical an…
A Critical Assessment of Nonlinear Force-Free Field Modeling of the Solar Corona for Active Region 10953
Leka, K. D.; Cheung, Mark C. M.; Lites, Bruce W. +16 more
Nonlinear force-free field (NLFFF) models are thought to be viable tools for investigating the structure, dynamics, and evolution of the coronae of solar active regions. In a series of NLFFF modeling studies, we have found that NLFFF models are successful in application to analytic test cases, and relatively successful when applied to numerically …
Photometric Redshift and Classification for the XMM-COSMOS Sources
Aussel, H.; Le Floc'h, E.; Sanders, D. B. +40 more
We present photometric redshifts and spectral energy distribution (SED) classifications for a sample of 1542 optically identified sources detected with XMM in the COSMOS field. Our template fitting classifies 46 sources as stars and 464 as nonactive galaxies, while the remaining 1032 require templates with an active galactic nucleus (AGN) contribu…