Search Publications
Old galaxies in the young Universe
Cimatti, A.; Daddi, E.; Rodighiero, G. +8 more
More than half of all stars in the local Universe are found in massive spheroidal galaxies, which are characterized by old stellar populations with little or no current star formation. In present models, such galaxies appear rather late in the history of the Universe as the culmination of a hierarchical merging process, in which larger galaxies ar…
Magnetosphere Imaging Instrument (MIMI) on the Cassini Mission to Saturn/Titan
Livi, S.; Hsieh, K. C.; Krupp, N. +22 more
The magnetospheric imaging instrument (MIMI) is a neutral and charged particle detection system on the Cassini orbiter spacecraft designed to perform both global imaging and in-situ measurements to study the overall configuration and dynamics of Saturn’s magnetosphere and its interactions with the solar wind, Saturn’s atmosphere, Titan, and the ic…
S4N: A spectroscopic survey of stars in the solar neighborhood. The Nearest 15 pc
Allende Prieto, C.; Lambert, D. L.; Barklem, P. S. +1 more
We report the results of a high-resolution spectroscopic survey of all the stars more luminous than M_V = 6.5 mag within 14.5 pc from the Sun. The Hipparcos catalog's completeness limits guarantee that our survey is comprehensive and free from some of the selection effects in other samples of nearby stars. The resulting spectroscopic database, whi…
The 24 Micron Source Counts in Deep Spitzer Space Telescope Surveys
Rigby, J. R.; Le Floc'h, E.; Dole, H. +20 more
Galaxy source counts in the infrared provide strong constraints on the evolution of the bolometric energy output from distant galaxy populations. We present the results from deep 24 µm imaging from Spitzer surveys, which include ~5×104 sources to an 80% completeness of ~=60 µJy. The 24 µm counts rapidly rise at near-Eu…
The Helium Abundances of ω Centauri
Norris, John E.
Recent Hubble Space Telescope color magnitude diagrams (CMDs) of ω Centauri, which clearly show three sequences in the region of the main-sequence turnoff together with a double lower main sequence, are explained in terms of three populations having canonical heavy-element abundances ([Fe/H]=-1.7, -1.2, and -0.6), reasonable proportions and ages, …
Torsional Oscillation, Meridional Flows, and Vorticity Inferred in the Upper Convection Zone of the Sun by Time-Distance Helioseismology
Zhao, Junwei; Kosovichev, Alexander G.
By applying time-distance helioseismology measurements and inversions to Solar and Heliospheric Observatory (SOHO) Michelson Doppler Imager (MDI) dynamics campaign data, we obtain synoptic maps of subsurface plasma-flow fields at a depth of 0-12 Mm for seven solar Carrington rotations, covering the years 1996-2002, from solar-activity minimum to m…
Cassini Imaging Science: Instrument Characteristics And Anticipated Scientific Investigations At Saturn
Dones, Luke; West, Robert A.; Porco, Carolyn C. +17 more
The Cassini Imaging Science Subsystem (ISS) is the highest-resolution two-dimensional imaging device on the Cassini Orbiter and has been designed for investigations of the bodies and phenomena found within the Saturnian planetary system. It consists of two framing cameras: a narrow angle, reflecting telescope with a 2-m focal length and a square f…
The VIMOS VLT Deep Survey. Public release of 1599 redshifts to IAB≤24 across the Chandra Deep Field South
Bondi, M.; Maccagni, D.; Ilbert, O. +47 more
This paper presents the VIMOS VLT Deep Survey around the Chandra Deep Field South (CDFS). We have measured 1599 new redshifts with VIMOS on the European Observatory Very Large Telescope - UT3, in an area 21 × 21.6 arcmin2, including 784 redshifts in the Hubble Space Telescope - Advanced Camera for Surveys GOODS area. 30% of all objects …
A Deep Wide-Field, Optical, and Near-Infrared Catalog of a Large Area around the Hubble Deep Field North
Stern, D.; Dickinson, M.; Giavalisco, M. +10 more
We have conducted a deep multicolor imaging survey of 0.2 deg2 centered on the Hubble Deep Field North (HDF-N). We shall refer to this region as the Hawaii HDF-N. Deep data were collected in U, B, V, R, I, and z' bands over the central 0.2 deg2 and in HK' over a smaller region covering the Chandra Deep Field North. The data w…
On the three-dimensional configuration of coronal mass ejections
Bothmer, V.; Cremades, H.
Coronal mass ejections (CMEs) are a direct consequence of the dynamic nature of the solar atmosphere. They represent fundamental processes in which energy is transferred from the Sun into interplanetary space, including geospace. Their origin, 3D structure and internal magnetic field configuration are to date not well understood. The SOHO spacecra…