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The eleventh and twelfth data releases of the Sloan Digital Sky Survey: final data from SDSS-III
- S. Alam, F. D. Albareti, Key Laboratory of Optical Astronomy
- Physics
- 5 January 2015
The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using the original SDSS wide-field imager, the original and an upgraded multi-object fiber-fed optical…
Evolution of the Solar Activity over Time and Effects on Planetary Atmospheres. I. High-Energy Irradiances (1-1700 Å)
- I. Ribas, E. Guinan, U. Columbia
- Physics, Geology
- 10 December 2004
We report on the results of the Sun in Time multiwavelength program (X-rays to UV) of solar analogs with ages covering ~0.1-7 Gyr. The chief science goals are to study the solar magnetic dynamo and…
The chemical composition of metal-poor emission-line galaxies in the Data Release 3 of the Sloan Digital Sky Survey
- Y. Izotov, G. Stasińska, Usa
- Physics
- 22 November 2005
We have re-evaluated empirical expressions for the abundance determination of N, O, Ne, S, Cl, Ar and Fe taking into account the latest atomic data and constructing an appropriate grid of…
Nucleosynthesis in massive stars with improved nuclear and stellar physics
- T. Rauscher, A. Heger, Llnl
- Physics
- 20 December 2001
We present the first calculations to follow the evolution of all stable nuclei and their radioactive progeni- tors in stellar models computed from the onset of central hydrogen burning through…
alpha-, r-, and s-process element trends in the Galactic thin and thick disks
- T. Bensby, S. Feltzing, H Germany
- Physics
- 6 December 2004
From a detailed elemental abundance analysis of 102 F and G dwarf starswe present abundance trends in the Galactic thin and thick disks for 14elements (O, Na, Mg, Al, Si, Ca, Ti, Cr, Fe, Ni, Zn, Y,…
Spitzer view on the evolution of star-forming galaxies from z = 0 to z ∼ 3
- P. Pérez-González, G. Rieke, Usa
- Physics
- 5 May 2005
We use a 24 ?m-selected sample containing more than 8000 sources to study the evolution of star-forming galaxies in the redshift range from z = 0 to z ~ 3. We obtain photometric redshifts for most of…
Galaxies in the Hubble Ultra Deep Field. I. Detection, Multiband Photometry, Photometric Redshifts, and Morphology
- D. Coe, N. Benı́tez, Santa Cruz
- Physics
- 10 May 2006
We present aperture-matched point-spread function (PSF)-corrected BVi'z'JH photometry and Bayesian photometric redshifts (BPZ) for objects detected in the Hubble Ultra Deep Field (UDF), 8042 of which…
SELF-CONSISTENT MODELS OF THE AGN AND BLACK HOLE POPULATIONS: DUTY CYCLES, ACCRETION RATES, AND THE MEAN RADIATIVE EFFICIENCY
- F. Shankar, D. Weinberg, Jordi Miralda-Escude Yale University, Usa, -Institut de Ciencies de l'Espai Icrea, Spain.
- Physics
- 24 October 2007
We construct evolutionary models of the populations of active galactic nuclei (AGNs) and supermassive black holes, in which the black hole mass function grows at the rate implied by the observed…
Bulge n and B/T in High Mass Galaxies: Constraints on the Origin of Bulges in Hierarchical Models
- T. Weinzirl, S. Jogee, Universitatssternwarte Munchen
- Physics
- 1 July 2008
We use the bulge Sersic index n and bulge-to-total mass ratio (B/T) to explore the fundamental question of how bulges form. We perform two-dimensional bulge-disk-bar decomposition on H-band images of…
In hot pursuit of the hidden companion of Carinae: An X-ray determination of the wind parameters
- J. Pittard, M. Leeds, UK., Gsfc, Usa
- Physics, Geology
- 8 January 2002
We present X-ray spectral ts to a recently obtained Chandra grating spectrum of Carinae, one of the most massive and powerful stars in the Galaxy and which is strongly suspected to be a colliding…
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