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Suzaku observations of a shock front tracing the western edge of the giant radio halo in the Coma Cluster
Allen, Steven W.; Takahashi, Tadayuki; Ichinohe, Yuto +5 more
We present the results of new Suzaku observations of the Coma Cluster, the X-ray brightest, nearby, merging system hosting a well-studied, typical giant radio halo. It has been previously shown that, on the western side of the cluster, the radio brightness shows a much steeper gradient compared to other azimuths. XMM-Newton and Planck revealed a s…
The Storm of Decameter Spikes During the Event of 14 June 2012
Rucker, H. O.; Poedts, S.; Zarka, P. +8 more
An event on 14 June 2012, observed with the radio telescopes UTR-2 (Kharkov, Ukraine), URAN-2 (Poltava, Ukraine), and NDA (Nançay, France) during a joint Summer campaign, is analyzed and discussed. The high solar activity resulted in a storm of spikes, and a storm of Type III bursts, Type IIIb bursts, and a Type IV burst observed in the decameter …
Red, Straight, no bends: primordial power spectrum reconstruction from CMB and large-scale structure
Verde, Licia; Cuesta, Antonio J.; Ravenni, Andrea
We present a minimally parametric, model independent reconstruction of the shape of the primordial power spectrum. Our smoothing spline technique is well-suited to search for smooth features such as deviations from scale invariance, and deviations from a power law such as running of the spectral index or small-scale power suppression. We use a com…
Numerical predictions for planets in the debris discs of HD 202628 and HD 207129
Maddison, S. T.; Thilliez, E.
Resolved debris disc images can exhibit a range of radial and azimuthal structures, including gaps and rings, which can result from planetary companions shaping the disc by their gravitational influence. Currently, there are no tools available to determine the architecture of potential companions from disc observations. Recent work by Rodigas, Mal…
Titan's meridional wind profile and Huygens' orientation and swing inferred from the geometry of DISR imaging
Karkoschka, Erich
The altitude and zonal motion of the Huygens probe descending through Titan's atmosphere was determined early under the assumption of no meridional motion (Bird et al. [2005]. Nature 438, 800-802). By comparing images taken during the descent, Karkoschka et al. (Karkoschka et al. [2007]. Planet. Space Sci. 55, 1895-1935) determined the meridional …
The 6 µm Feature As a Tracer of Aliphatic Components of Interstellar Carbonaceous Grains
Zhang, Yong; Kwok, Sun; Hsia, Chih-Hao +1 more
An unidentified infrared emission (UIE) feature at 6.0 µm is detected in a number of astronomical sources showing the UIE bands. In contrast to the previous suggestion that this band is due to C=O vibrational modes, we suggest that the 6.0 µm feature arises from olefinic double-bond functional groups. These groups are likely to be atta…
Accretion disk winds in active galactic nuclei: X-ray observations, models, and feedback
Tombesi, F.
Powerful winds driven by active galactic nuclei (AGN) are often invoked to play a fundamental role in the evolution of both supermassive black holes (SMBHs) and their host galaxies, quenching star formation and explaining the tight SMBH-galaxy relations. A strong support of this ``quasar mode'' feedback came from the recent X-ray observation of a …
A novel method for surface exploration: Super-resolution restoration of Mars repeat-pass orbital imagery
Tao, Y.; Muller, J. -P.
Higher resolution imaging data of planetary surfaces is considered desirable by the international community of planetary scientists interested in improving understanding of surface formation processes. However, given various physical constraints from the imaging instruments through to limited bandwidth of transmission one needs to trade-off spatia…
The Circumgalactic Medium of Submillimeter Galaxies. I. First Results from a Radio-identified Sample
Cooray, A.; Fu, Hai; Michałowski, M. J. +14 more
We present the first results from an ongoing survey to characterize the circumgalactic medium (CGM) of massive high-redshift galaxies detected as submillimeter galaxies (SMGs). We constructed a parent sample of 163 SMG-QSO pairs with separations less than ∼36″ by cross-matching far-infrared-selected galaxies from Herschel with spectroscopically co…
Finest light curve details, physical parameters, and period fluctuations of CoRoT RR Lyrae stars
Derekas, A.; Szabó, R.; Sódor, Á. +1 more
The CoRoT satellite supplied the scientific community with a huge data base of variable stars. Among them the RR Lyrae stars have intensively been discussed in numerous papers in the last few years, but the latest runs have not been checked to find RR Lyrae stars up to now. Our main goal was to fill this gap and complete the CoRoT RR Lyrae sample.…