Search Publications
Type Ia Supernova Discoveries at z > 1 from the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
Dickinson, Mark; Ferguson, Henry C.; Giavalisco, Mauro +16 more
We have discovered 16 Type Ia supernovae (SNe Ia) with the Hubble Space Telescope (HST) and have used them to provide the first conclusive evidence for cosmic deceleration that preceded the current epoch of cosmic acceleration. These objects, discovered during the course of the GOODS ACS Treasury program, include 6 of the 7 highest redshift SNe Ia…
Secular Evolution and the Formation of Pseudobulges in Disk Galaxies
Kormendy, John; Kennicutt, Robert C., Jr.
The Universe is in transition. At early times, galactic evolution was dominated by hierarchical clustering and merging, processes that are violent and rapid. In the far future, evolution will mostly be secular the slow rearrangement of energy and mass that results from interactions involving collective phenomena such as bars, oval disks, spiral st…
The Great Observatories Origins Deep Survey: Initial Results from Optical and Near-Infrared Imaging
Cesarsky, C.; Wolf, C.; Jogee, S. +54 more
This special issue of the Astrophysical Journal Letters is dedicated to presenting initial results from the Great Observatories Origins Deep Survey (GOODS) that are primarily, but not exclusively, based on multiband imaging data obtained with the Hubble Space Telescope and the Advanced Camera for Surveys (ACS). The survey covers roughly 320 arcmin…
The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ∼14 000 F and G dwarfs
Pont, F.; Holmberg, J.; Nordström, B. +6 more
We present and discuss new determinations of metallicity, rotation, age, kinematics, and Galactic orbits for a complete, magnitude-limited, and kinematically unbiased sample of 16 682 nearby F and G dwarf stars. Our ∼63 000 new, accurate radial-velocity observations for nearly 13 500 stars allow identification of most of the binary stars in the sa…
A Large Stellar Evolution Database for Population Synthesis Studies. I. Scaled Solar Models and Isochrones
Salaris, Maurizio; Cassisi, Santi; Pietrinferni, Adriano +1 more
We present a large and updated stellar evolution database for low-, intermediate-, and high-mass stars in a wide metallicity range, suitable for studying Galactic and extragalactic simple and composite stellar populations using population synthesis techniques. The stellar mass range is between ~0.5 and 10 Msolar with a fine mass spacing…
A catalog of white light coronal mass ejections observed by the SOHO spacecraft
St. Cyr, O. C.; Plunkett, S. P.; Howard, R. A. +4 more
The Solar and Heliospheric Observatory (SOHO) mission's white light coronagraphs have observed nearly 7000 coronal mass ejections (CMEs) between 1996 and 2002. We have documented the measured properties of all these CMEs in an online catalog. We describe this catalog and present a summary of the statistical properties of the CMEs. The primary meas…
Spectroscopic [Fe/H] for 98 extra-solar planet-host stars. Exploring the probability of planet formation
Santos, N. C.; Mayor, M.; Israelian, G.
We present stellar parameters and metallicities, obtained from a detailed spectroscopic analysis, for a large sample of 98 stars known to be orbited by planetary mass companions (almost all known targets), as well as for a volume-limited sample of 41 stars not known to host any planet. For most of the stars the stellar parameters are revised versi…
A New Nonparametric Approach to Galaxy Morphological Classification
Lotz, Jennifer M.; Primack, Joel; Madau, Piero
We present two new nonparametric methods for quantifying galaxy morphology: the relative distribution of the galaxy pixel flux values (the Gini coefficient or G) and the second-order moment of the brightest 20% of the galaxy's flux (M20). We test the robustness of G and M20 to decreasing signal-to-noise ratio (S/N) and spatia…
A Catalog of Neighboring Galaxies
Karachentsev, Igor D.; Makarov, Dmitry I.; Karachentseva, Valentina E. +1 more
We present an all-sky catalog of 451 nearby galaxies, each having an individual distance estimate D<~10 Mpc or a radial velocity VLG<550 km s-1. The catalog contains data on basic optical and H I properties of the galaxies, in particular, their diameters, absolute magnitudes, morphological types, circumnuclear region ty…
Interstellar Ice: The Infrared Space Observatory Legacy
Whittet, D. C. B.; Tielens, A. G. G. M.; Boogert, A. C. A. +1 more
We present 2.5-30 µm spectra from the Short-Wavelength Spectrometer of the Infrared Space Observatory for a total of 23 sources. The sources include embedded young stellar objects spanning a wide range of mass and luminosity, together with field stars sampling quiescent dark clouds and the diffuse interstellar medium. Expanding on results of…