Search Publications
Missions
Journals
Publication Years
The Bright Ages Survey. II. Evolution of Luminosity, Dust Extinction, and Star Formation from z=0.5 to z=2.5
Rich, R. Michael; Malkan, Matthew A.; Colbert, James W.
The Bright Ages Survey is a K-band-selected redshift survey over six separate fields with UBVRIzJHK imaging covering a total of 75.6 arcmin 2 and reaching K=20-20.5. Two fields have deep HST imaging, while all are centered on possible overdensities in the z~2 range. Here we report photometric redshifts and spectroscopy for this sample, …
An Optical-Infrared Jet in 3C 133
O'Dea, Christopher P.; Baum, Stefi; Chiaberge, Marco +10 more
We report the discovery of a new optical-IR synchrotron jet in the radio galaxy 3C 133 from our HST NICMOS snapshot survey. The jet and eastern hot spot are well resolved and visible at both optical and IR wavelengths. The IR jet follows the morphology of the inner part of the radio jet, with three distinct knots identified with features in the ra…
Fourier Analysis of Hubble Space Telescope Fine Guidance Sensor Data of Binary Stars and Application to the Multiple System HD 157948
Wasserman, Lawrence H.; Horch, Elliott P.; Franz, Otto G. +1 more
A Fourier-based method is presented for the analysis of binary and multiple star data taken with the Hubble Space Telescope Fine Guidance Sensors (FGSs). Relative astrometry and magnitude differences are obtained as with standard FGS analysis techniques, and although the FGS system is essentially unfiltered, this method also permits the characteri…
Propagation pattern of low frequency waves in the terrestrial magnetosheath
Glassmeier, K. -H.; Narita, Y.
Propagation pattern (distribution of phase velocities) is determined in three dimensions in the terrestrial magnetosheath on a statistical basis using Cluster spacecraft observations. It is found that the anti-sunward propagation dominates and that the propagation direction is toward the magnetosheath flank at smaller zenith angles, while it is to…
High-resolution infrared spectroscopy of ethane in Titan's stratosphere in the Huygens epoch
Sonnabend, G.; Kostiuk, T.; Schieder, R. +7 more
High-resolution infrared spectroscopy of ethane (C2H6) emission features formed in the stratosphere of Titan was collected on disc center at 11.74 µm wavelength (851 cm-1) on 15 January 2005 UT. The observations were obtained at the Subaru 8.2 m telescope of the National Astronomical Observatory of Japan on M…
Restoring color-magnitude diagrams with the Richardson-Lucy algorithm
Cignoni, M.; Shore, S. N.
Aims.We present an application of the Richardson-Lucy algorithm to the analysis of color-magnitude diagrams by converting the CMD into an image and using a restoring point spread function function (psf) derived from the known, often complex, sources of error.
Methods: .We show numerical experiments that demonstrate good recovery of the origina…
INTEGRAL/IBIS search for e-e+ annihilation radiation from the galactic center region
Capitanio, F.; Ubertini, P.; Bazzano, A. +5 more
Electron positron annihilation radiation from the Galactic Center Region has been detected since the seventies, but its astrophysical origin is still a topic of a scientific debate. We have analyzed data of the gamma-ray imager IBIS/ISGRI onboard of ESA’s INTEGRAL platform in the e-e+ line. During the first year of the missio…
67P/Churyumov Gerasimenko nucleus model: Portrayal of the Rosetta target
Coradini, A.; De Sanctis, M. C.; Capria, M. T.
Rosetta is a cornerstone ESA mission dedicated to the detailed study of a comet nucleus before and after the onset of activity. Comet 67P/Churyumov-Gerasimenko is the new Rosetta target. At the moment, little is known about this comet, but the successful design of the ROSETTA mission requires some preliminary knowledge of the comet's physical para…
A Deprojection Analysis of Abell 1650 with XMM-Newton
Chen, Li; Jia, Shu-Mei; Chen, Yong
We revisit the XMM-Newton observation of the galaxy cluster Abell 1650 with a deprojection technique. We find that the radial deprojected spectra of Abell 1650 can be marginally fitted by a single-temperature model. In order to study the properties of the central gas, we fit the spectra of the central two regions with a two-temperature model. The …
On the Spiral Structure of NGC 5248: An Analytic Approach
Yuan, Chi; Yang, Chao-Chin
An improved nonlinear asymptotic theory of spiral density waves is developed. It extends the theory developed by Yuan & Kuo to a global theory, not just one limited to the vicinity of the resonance. It can then be applied to the recent high-resolution observations of CO and HST NICMOS of nearby spiral galaxies. As an example, we apply the theo…