Search Publications
The zCOSMOS redshift survey: the role of environment and stellar mass in shaping the rise of the morphology-density relation from z ~ 1
Kneib, J. -P.; Maccagni, D.; Cimatti, A. +57 more
Context: For more than two decades we have known that galaxy morphological segregation is present in the Local Universe. It is important to see how this relation evolves with cosmic time.
Aims: To investigate how galaxy assembly took place with cosmic time, we explore the evolution of the morphology-density relation up to redshift z ~ 1 using …
Cassini imaging of Titan's high-latitude lakes, clouds, and south-polar surface changes
West, R. A.; Porco, C. C.; McEwen, A. S. +5 more
Cassini's Imaging Science Subsystem (ISS) has been observing Titan since April 2004, compiling a nearly global surface map and monitoring the surface and atmosphere for activity. Early images of the south-polar region revealed numerous dark surface features and contemporaneous convective cloud systems, suggesting the presence of hydrocarbon lakes …
The Golden Standard Type Ia Supernova 2005cf: Observations from the Ultraviolet to the Near-Infrared Wavebands
Cenko, S. B.; Malkan, M. A.; Gal-Yam, A. +32 more
We present extensive photometry at ultraviolet (UV), optical, and near-infrared (NIR) wavelengths, as well as dense sampling of optical spectra, for the normal Type Ia supernova (SN Ia) 2005cf. The optical photometry, performed at eight different telescopes, shows a 1σ scatter of lsim0.03 mag after proper corrections for the instrument responses. …
Relation Between Type II Bursts and CMEs Inferred from STEREO Observations
Kaiser, M. L.; Howard, R. A.; Gopalswamy, N. +6 more
The inner coronagraph (COR1) of the Solar Terrestrial Relations Observatory (STEREO) mission has made it possible to observe CMEs in the spatial domain overlapping with that of the metric type II radio bursts. The type II bursts were associated with generally weak flares (mostly B and C class soft X-ray flares), but the CMEs were quite energetic. …
Phosphine on Jupiter and Saturn from Cassini/CIRS
Fletcher, L. N.; Irwin, P. G. J.; Teanby, N. A. +1 more
The global distribution of phosphine (PH 3) on Jupiter and Saturn is derived using 2.5 cm -1 spectral resolution Cassini/CIRS observations. We extend the preliminary PH 3 analyses on the gas giants [Irwin, P.G.J., and 6 colleagues, 2004. Icarus 172, 37-49; Fletcher, L.N., and 9 colleagues, 2007a. Icarus 188, 72-88]…
The ACS Virgo Cluster Survey XVI. Selection Procedure and Catalogs of Globular Cluster Candidates
Jordán, Andrés; Eyheramendy, Susana; Tonry, John L. +6 more
We present catalogs of globular cluster candidates for the 100 galaxies of the Advanced Camera for Surveys Virgo Cluster Survey, a large program to carry out imaging of early-type members of the Virgo Cluster using the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope. We describe the procedure used to select bona fide globular clust…
Deriving the radial distances of wide coronal mass ejections from elongation measurements in the heliosphere - application to CME-CME interaction
Vourlidas, A.; Lugaz, N.; Roussev, I. I.
We present general considerations regarding the derivation of the radial distances of coronal mass ejections (CMEs) from elongation angle measurements such as those provided by SECCHI and SMEI, focusing on measurements in the Heliospheric Imager 2 (HI-2) field of view (i.e. past 0.3 AU). This study is based on a three-dimensional (3-D) magneto-hyd…
The evolution of the high-energy cut-off in the X-ray spectrum of GX 339-4 across a hard-to-soft transition
Belloni, T.; Homan, J.; Motta, S.
We report on X-ray observations of the black hole candidate GX 339-4 during its 2006/2007 outburst. The hardness-intensity diagram (HID) of all RXTE/Proportional Counter Array data combined shows a q-shaped track similar to that observed in previous outbursts. The evolution through the HID suggests that in the early phase of the outburst the sourc…
Transit spectrophotometry of the exoplanet HD 189733b. I. Searching for water but finding haze with HST NICMOS
Vidal-Madjar, A.; Sing, D. K.; Ballester, G. E. +5 more
We present Hubble Space Telescope near-infrared transit photometry of the nearby hot-Jupiter
Lyman Alpha Galaxies: Primitive, Dusty, or Evolved?
Finkelstein, Steven L.; Malhotra, Sangeeta; Grogin, Norman +1 more
We present stellar population modeling results for ten newly discovered Lyman alpha emitting galaxies (LAEs), as well as four previously known LAEs at z ~ 4.5 in the Chandra Deep Field-South. We fit stellar population models to these objects in order to specifically learn if there exists more than one class of LAE. Past observational and theoretic…