Search Publications
Hubble Space Telescope/Advanced Camera for Surveys Observations of Europa's Atmospheric Ultraviolet Emission at Eastern Elongation
Nimmo, Francis; Saur, Joachim; Roth, Lorenz +7 more
We report results of a Hubble Space Telescope (HST) campaign with the Advanced Camera for Surveys to observe Europa at eastern elongation, i.e., Europa's leading side, on 2008 June 29. With five consecutive HST orbits, we constrain Europa's atmospheric O I 1304 Å and O I 1356 Å emissions using the prism PR130L. The total emissions of both oxygen m…
Identification of Super- and Subcritical Regions in Shocks Driven by Coronal Mass Ejections
Bemporad, A.; Mancuso, S.
In this work, we focus on the analysis of a coronal mass ejection (CME) driven shock observed by the Solar and Heliospheric Observatory/Large Angle and Spectrometric Coronagraph Experiment. We show that white-light coronagraphic images can be employed to estimate the compression ratio X = ρ d /ρ u all along the front of CME-…
Observations of EUV and soft X-ray recurring jets in an active region
Bi, Yi; Yang, Li-Heng; Jiang, Yun-Chun +3 more
We present simultaneous observations of three recurring jets in EUV and soft X-ray (SXR), which occurred in an active region on 2007 June 5. By comparing their morphological and kinematic characteristics in these two different wavelengths, we found that EUV and SXR jets had similar locations, directions, sizes and velocities. We also analyzed thei…
Galactic distributions of carbon- and oxygen-rich AGB stars revealed by the AKARI mid-infrared all-sky survey
Matsunaga, N.; Onaka, T.; Kaneda, H. +3 more
Context. The environmental conditions for asympotic giant branch (AGB) stars to reach the carbon-rich (C-rich) phase are important to understand the evolutionary process of AGB stars. The difference between the spatial distributions of C-rich and oxygen-rich (O-rich) AGB stars is essential for the study of the Galactic structure and the chemical e…
Strong-lensing analysis of MS 1358.4+6245: New multiple images and implications for the well-resolved z= 4.92 galaxy
Broadhurst, Tom; Zitrin, Adi; Coe, Dan +5 more
We present a strong-lensing analysis of the galaxy cluster MS 1358.4+6245 (z= 0.33), in deep six-band HST/ACS imaging. In addition to the well-studied system at z= 4.92, our modelling method uncovers 19 new multiply lensed images belonging to seven background sources, so that a total of 23 images and their redshifts are used to accurately constrai…
Wave constraints for Titan’s Jingpo Lacus and Kraken Mare from VIMS specular reflection lightcurves
Nicholson, Philip D.; Sotin, Christophe; Barnes, Jason W. +10 more
Stephan et al. (Stephan, K. et al. [2010]. Geophys. Res. Lett. 37, 7104-+.) first saw the glint of sunlight specularly reflected off of Titan's lakes. We develop a quantitative model for analyzing the photometric lightcurve generated during a flyby in which the specularly reflected light flux depends on the fraction of the solar specular footprint…
The scatter in the radial profiles of X-ray luminous galaxy clusters as diagnostic of the thermodynamical state of the ICM
Ettori, S.; Roncarelli, M.; Vazza, F. +1 more
We study the azimuthal scatter in the radial profiles of X-ray luminous galaxy clusters with two sets of high-resolution cosmological re-simulations obtained with the codes ENZO and GADGET2. The average gas profiles are computed for different angular sectors of the cluster projected volume and compared with the mean cluster profiles at each radius…
Soft and Hard X-Ray Emissions from the Anomalous X-Ray Pulsar 4U 0142+61 Observed with Suzaku
Enoto, Teruaki; Kokubun, Motohide; Makishima, Kazuo +4 more
The anomalous X-ray pulsar 4U 0142
Half-widths, their temperature dependence, and line shifts for the HDO-CO 2 collision system for applications to CO 2-rich planetary atmospheres
Gamache, Robert R.; Laraia, Anne L.; Lamouroux, Julien
Measurements of water vapor in the atmospheres of Venus or Mars by spectroscopic techniques in the infrared range are being made routinely by instruments onboard the Venus Express and the Mars Reconnaissance Orbiter. The interpretation of these measurements in the 2250-4450 cm -1 region is being complicated by the presence of HDO lines …
Obscured GOODS Active Galactic Nuclei and Their Host Galaxies at z < 1.25: The Slow Black Hole Growth Phase
Treister, E.; Koekemoer, A. M.; Grogin, N. A. +4 more
We compute black hole masses and bolometric luminosities for 87 obscured active galactic nuclei (AGNs) in the redshift range 0.25 <= z <= 1.25, selected from the GOODS deep multi-wavelength survey fields via their X-ray emission. We fit the optical images and obtain morphological parameters for the host galaxy, separating the galaxy from its…