Search Publications
3D Reconstruction of Interplanetary Scintillation (IPS) Remote-Sensing Data: Global Solar Wind Boundaries for Driving 3D-MHD Models
Odstrcil, D.; Davies, J. A.; Jackson, B. V. +6 more
The University of California, San Diego, time-dependent analyses of the heliosphere provide three-dimensional (3D) reconstructions of solar wind velocities and densities from observations of interplanetary scintillation (IPS). Using data from the Solar-Terrestrial Environment Laboratory, Japan, these reconstructions provide a real-time prediction …
Tracing cool molecular gas and star formation on ∼100 pc scales within a z ∼ 2.3 galaxy
Thomson, A. P.; Ivison, R. J.; Smail, Ian +3 more
We present new, high-angular resolution interferometric observations with the Karl G. Jansky Very Large Array of 12CO J = 1-0 line emission and 4-8 GHz continuum emission in the strongly lensed, z = 2.3 submillimetre galaxy, SMM J21352-0102. Using these data, we identify and probe the conditions in ∼100 pc clumps within this galaxy, whi…
Suzaku X-Ray Observations of the Fermi Bubbles: Northernmost Cap and Southeast Claw Discovered With MAXI-SSC
Hiraga, J. S.; Cheung, C. C.; Kataoka, J. +8 more
We report on Suzaku observations of large-scale X-ray structures possibly related to the Fermi Bubbles obtained in 2013 with a total duration of ≃80 ks. The observed regions were (1) the northern cap (N-cap; l ∼ 0°, 45°\lt b\lt 55°) seen in the mid-band (1.7-4.0 keV) map recently provided by Monitor of All-sky X-ray Image Solid-state Slit Camera (…
Negatively charged nano-grains at 67P/Churyumov-Gerasimenko
Gombosi, T. I.; Burch, J. L.; Horányi, M.
Shortly after the Rosetta mission's rendezvous with 67P/Churyumov-Gerasimenko the RPC/IES instrument intermittently detected negative particles that were identified as singly charged nano-dust grains. These grains were recorded as a nearly mono-energetic beam of particles in the 200-500 eV range arriving from the direction of the comet. Occasional…
Carbon monoxide and temperature in the upper atmosphere of Venus from VIRTIS/Venus Express non-LTE limb measurements
López-Valverde, M. A.; Gilli, G.; Drossart, P. +4 more
The upper mesosphere and the lower thermosphere of Venus (from 90 to 150 km altitude) seems to play a transition region in photochemistry, dynamics and radiation, but is still very poorly constrained observationally. Since 2006 VIRTIS on board Venus Express has been obtaining limb observations of CO fluorescent infrared emissions in a systematic m…
Rapid Temperature Changes and the Early Activity on Comet 67P/Churyumov-Gerasimenko
Alí-Lagoa, V.; Delbo', M.; Libourel, G.
The so-called “early activity” of comet 67P/Churyumov-Gerasimenko has been observed to originate mostly in parts of the concave region or “neck” between its two lobes. Since activity is driven by the sublimation of volatiles, this is a puzzling result because this area is less exposed to the Sun and is therefore expected to be cooler on average. W…
New Radio Observations of Anomalous Microwave Emission in the H II Region RCW175
de Bernardis, P.; Masi, S.; Paladini, R. +9 more
We have observed the H II region RCW175 with the 64 m Parkes telescope at 8.4 GHz and 13.5 GHz in total intensity, and at 21.5 GHz in both total intensity and polarization. High angular resolution ranging from 1 to 2.4 arcmin, high sensitivity, and polarization capability enable us to perform a detailed study of the different constituents of the H…
The Dustiest Post-Main Sequence Stars in the Magellanic Clouds
Boyer, Martha L.; Meixner, Margaret; Roman-Duval, Julia +4 more
Using observations from the Herschel Inventory of The Agents of Galaxy Evolution (HERITAGE) survey of the Magellanic Clouds (MC), we have found 35 evolved stars and stellar end products that are bright in the far-infrared. These 28 (LMC) and 7 (SMC) sources were selected from the 529 evolved star candidates in the HERITAGE far-infrared point sourc…
SCORPIO: a deep survey of radio emission from the stellar life-cycle
Umana, G.; Agliozzo, C.; Trigilio, C. +7 more
Radio emission has been detected in a broad variety of stellar objects from all stages of stellar evolution. However, most of our knowledge originates from targeted observations of small samples, which are strongly biased to sources which are peculiar at other wavelengths. In order to tackle this problem we have conducted a deep 1.4 GHz survey by …
Spectral and timing analysis of the mHz QPOs in the neutron-star low-mass X-ray binary 4U 1636-53
Méndez, Mariano; Keek, L.; Zhang, Guobao +1 more
We investigate the spectral and timing properties of the millihertz quasi-periodic oscillations (mHz QPOs) in neutron-star low-mass X-ray binary 4U 1636-53 using XMM-Newton and Rossi X-ray Timing Explorer (RXTE) observations. The mHz QPOs in the XMM-Newton/RXTE observations show significant frequency variation and disappear right before type I X-r…