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The high energy spectrum of 3C 273
Lähteenmäki, A.; Tramacere, A.; Walter, R. +4 more
Aims: The high energy spectrum of 3C 273 is usually understood in terms of inverse-Compton emission in a relativistic leptonic jet. This model predicts variability patterns and delays that could be tested with simultaneous observations from the radio to the GeV range.
Methods: The instruments IBIS, SPI, JEM-X on board INTEGRAL, PCA on bo…
HST/COS detection of a Ne VIII absorber towards PG 1407+265: an unambiguous tracer of collisionally ionized hot gas?
Narayanan, A.; Wakker, B. P.; Muzahid, S. +4 more
We report the detection of Ne VIII in a zabs = 0.599 61 absorber towards the QSO PG1407+265 (zem= 0.94). Besides Ne VIII, absorption from H I Lyman series lines (H I λ1025-λ915), several other low (C II, N II, O II and S II), intermediate (C III, N III, N IV, O III, S IV and S V) and high (S VI, O VI and Ne VIII) ionization m…
Shapley Supercluster Survey: Galaxy evolution from filaments to cluster cores
Okabe, N.; Bourdin, H.; Mazzotta, P. +11 more
We present an overview of a multiwavelength survey of the Shapley Supercluster (SSC; z ∼ 0.05) covering a contiguous area of 260 h^{-2}_{70} Mpc2 including the supercluster core. The project main aim is to quantify the influence of cluster-scale mass assembly on galaxy evolution in one of the most massive structures in the local Univers…
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…