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Confirmation of the nature of the absorber in IRAS 09104+4109
Fabian, A. C.; Gandhi, P.; Cackett, E. M. +1 more
We present the first long Suzaku observation of the hyperluminous infrared galaxy IRAS 09104+4109 which is dominated by a Type 2 AGN. The infrared to X-ray spectral energy distribution (SED) indicates that the source is an obscured quasar with a Compton-thin absorber. However, the 3σ hard X-ray detection of the source with the BeppoSAX PDS suggest…
Rotational non-LTE in HCN in the thermosphere of Titan: Implications for the radiative cooling
Hartogh, P.; Rezac, L.; Kutepov, A. A. +2 more
Context. The thermal structure of Titan's thermosphere is determined by the balance between several heating and cooling processes. These processes must be accurately modeled to correctly interpret the available measurements and enhance our understanding of the formation and evolution of this atmosphere. One of the most important thermospheric cool…
A BeppoSAX and XMM-Newton spectral study of 4U 1735-44
Santangelo, A.; Mück, B.; Piraino, S.
Context. Low-mass X-ray binary systems consist of a neutron star and a main-sequence companion star. The compact object accretes matter via Roche-lobe overflow, which leads to an accretion disk. In addition to a broad-band continuum emission of a thermal component and a Comptonization part, evidence for a broad iron Kα line is found in …
The Hot--blackbody Spectral Excess in Low--luminosity High--Mass X--Ray Binaries
Tiengo, A.; Mereghetti, S.; Sidoli, L. +2 more
We report on the main results obtained thanks to an observation campaign with XMM-Newton of four persistent, low-luminosity (L_{X} ∼ 10^{34} erg s^{-1}) and long-period (P > 200 s) Be accreting pulsars. We found that all sources considered here are characterized by a spectral excess that can be described with a blackbody component of high tempe…
Orbifold line topology and the cosmic microwave background
Rathaus, Ben; Ben-David, Assaf; Itzhaki, Nissan
We extend our study of a universe with a non-classical stringy topology, and consider an orbifold line topology, Bbb R × Bbb R2/Bbb Zp. This topology has a fixed line and identifies each point in space with p-1 other points. An observable imprint of an orbifold line on the CMB is the appearance of up to (p-1)/2 pairs of match…
Dusty Universe viewed by AKARI far infrared detector
Buat, V.; Małek, K.; Burgarella, D. +5 more
We present the results of the analysis of multiwavelength Spectral Energy Distributions (SEDs) of far-infrared galaxies detected in the AKARI Deep Field-South (ADF-S) Survey. The analysis uses a carefully selected sample of 186 sources detected at the 90 µm AKARI band, identified as galaxies with cross-identification in public catalogues. Fo…
Clustering of far-infrared galaxies in the AKARI All-Sky Survey North
Oyabu, S.; Takeuchi, T. T.; Pollo, A. +4 more
We present the measurements of the angular two-point correlation function for AKARI 90-µm point sources, detected outside the Milky Way plane and other regions characterized by high Galactic extinction in the northern Galactic hemisphere, and categorized as extragalactic sources according to our far-infrared-color based criterion. Together w…
Cluster observations of large-scale southward movement and dawnward-duskward flapping of Earth's magnetotail current sheet
Cao, J. B.; Ma, Y. D.; Wei, X. H. +1 more
Simultaneous Analysis of Recurrent Jovian Electron Increases and Galactic Cosmic Ray Decreases
Fichtner, H.; Scherer, K.; Gómez-Herrero, R. +10 more
The transport environment for particles in the heliosphere, e.g. galactic cosmic rays (GCRs) and MeV electrons (including those originating from Jupiters magnetosphere), is defined by the solar wind flow and the structure of the embedded heliospheric magnetic field. Solar wind structures, such as co-rotating interaction regions (CIR), can result i…
Solar energetic particle arrival at Mars due to the 27 January 2012 solar storm
Kallio, E.; Barabash, S.; Winningham, J. D. +7 more
On January 27, 2012, an X-class flare brightened on the Sun at 18:15 UT. This event was associated with the generation of a high-energy stream of Solar Energetic Particles (SEPs) advancing along the Interplanetary Magnetic Field (IMF) which arrived at Mars in about 39 minutes. A Coronal Mass Ejection (CME) arrived at Mars several days later. The E…