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The location of magnetic reconnection at Saturn's magnetopause: A comparison with Earth
Frahm, R.; Masters, A.; Fuselier, S. A. +4 more
Data from the Cassini Electron Spectrometer are used to investigate the location of magnetic reconnection at Saturn's magnetopause. Heated, streaming electron distributions in the boundary layer on the magnetosheath side of the magnetopause are evidence of reconnection and an open magnetopause. A model for the location of reconnection is used to c…
Black hole accretion preferentially occurs in gas-rich galaxies*
Lutz, D.; Maiolino, R.; Pozzi, F. +15 more
We have investigated the gas content of a sample of several hundred AGN host galaxies at z < 1 and compared it with a sample of inactive galaxies, matched in bins of stellar mass and redshift. Gas masses have been inferred from the dust masses, obtained by stacked Herschel far-IR and sub-mm data in the GOODS and COSMOS fields, under reasonable …
Evidence for Active Galactic Nucleus Feedback in the Broad Absorption Lines and Reddening of Mrk 231
Gallagher, Sarah C.; Terndrup, Donald M.; Leighly, Karen M. +3 more
We present the first J-band spectrum of Mrk 231, which reveals a large He I* λ10830 broad absorption line with a profile similar to that of the well-known Na I broad absorption line. Combining this spectrum with optical and UV spectra from the literature, we show that the unusual reddening noted by Veilleux et al. is explained by a reddening curve…
Thermal Structure of Current Sheets and Supra-arcade Downflows in the Solar Corona
Reeves, Katharine K.; Hanneman, Will J.
After the peak intensity of many large solar flares, magnetic and thermodynamic processes give rise to a phenomenon known as supra-arcade downflows (SADs). SADs are sunward flowing density depletions, often observed in post-flare plasma sheets. Some models have suggested that the plasma in the dark lanes is heated to temperatures of 20-80 MK, whic…
Steps to reconcile inflationary tensor and scalar spectra
Hu, Wayne; Miranda, Vinícius; Adshead, Peter
The recent BICEP2 B-mode polarization determination of an inflationary tensor-scalar ratio r=0.2-0.05+0.07 is in tension with simple scale-free models of inflation due to a lack of a corresponding low multipole excess in the temperature power spectrum which places a limit of r0.002<0.11 (95% C.L.) on such models. Single-field inflati…
Analysis of a new geomorphological inventory of landslides in Valles Marineris, Mars
Komatsu, Goro; Brunetti, Maria Teresa; Guzzetti, Fausto +5 more
We completed a systematic mapping of landslides in a 105km2 area in Tithonium and Ius Chasmata, Valles Marineris, Mars, where landslides are abundant. Using visual interpretation of medium to high-resolution optical images, we mapped and classified the geometry of 219 mass wasting features, including rock slides, complex/comp…
Transit Confirmation and Improved Stellar and Planet Parameters for the Super-Earth HD 97658 b and its Host Star
Queloz, D.; Demory, B. -O.; Ehrenreich, D. +15 more
Super-Earths transiting nearby bright stars are key objects that simultaneously allow for accurate measurements of both their mass and radius, providing essential constraints on their internal composition. We present here the confirmation, based on Spitzer transit observations, that the super-Earth HD 97658 b transits its host star. HD 97658 is a …
Statistical Analysis of Large-Scale EUV Waves Observed by STEREO/EUVI
Temmer, M.; Veronig, A. M.; Vršnak, B. +3 more
We statistically analyzed the kinematical evolution and wave pulse characteristics of 60 strong large-scale EUV wave events that occurred during January 2007 to February 2011 with the STEREO twin spacecraft. For the start velocity, the arithmetic mean is 312±115 km s−1 (within a range of 100 - 630 km s−1). For the mean (linea…
Waves in a Venus general circulation model
Sugimoto, Norihiko; Takagi, Masahiro; Matsuda, Yoshihisa
Waves in the Venus atmosphere are numerically investigated by extending a work of Sugimoto et al. (2014). Fast superrotating zonal flow of 120 m s-1 at the equator is reproduced and maintained by solar heating for more than 10 Earth years. The meridional distribution of the obtained fast zonal flow is quite consistent with observations …
Physical Properties of White-light Sources in the 2011 February 15 Solar Flare
Fletcher, L.; Kerr, G. S.
White-light flares (WLFs) are observational rarities, making them understudied events. However, optical emission is a significant contribution to flare energy budgets and the emission mechanisms responsible could have important implications for flare models. Using Hinode SOT optical continuum data taken in broadband red, green, and blue filters, w…