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The dust masses of powerful radio galaxies: clues to the triggering of their activity.
Ysard, N.; Morganti, R.; Nesvadba, N. +4 more
We use deep Herschel Space Observatory observations of a 90 per cent complete sample of 32 intermediate-redshift 2Jy radio galaxies (0.05 < z < 0.7) with strong emission lines to estimate the dust masses of their host galaxies and thereby investigate the triggering mechanisms for their quasar-like AGN. The dust masses derived for the radio g…
Multi-instrument analysis of plasma parameters in Saturn's equatorial, inner magnetosphere using corrections for corrections for spacecraft potential and penetrating background radiation
Persoon, A. M.; Crary, F.; Mitchell, D. G. +4 more
We use a forward modeling program to derive one-dimensional isotropic plasma characteristics in Saturn's inner, equatorial magnetosphere using a novel correction for the spacecraft potential and penetrating background radiation. The advantage of this fitting routine is the simultaneous modeling of plasma data and systematic errors when operating o…
Physical Properties of Asteroids in Comet-like Orbits in Infrared Asteroid Survey Catalogs
Usui, Fumihiko; Kim, Yoonyoung; Ishiguro, Masateru
We investigated the population of asteroids in comet-like orbits using available asteroid size and albedo catalogs of data taken with the Infrared Astronomical Satellite, AKARI, and the Wide-field Infrared Survey Explorer on the basis of their orbital properties (i.e., the Tisserand parameter with respect to Jupiter, T J, and the apheli…
The age of Phobos and its largest crater, Stickney
Neukum, G.; Michael, G. G.; Murray, J. B. +2 more
We derived crater production functions and chronology functions of Phobos for two scenarios, which likely represent the end-members of its dynamical evolution. Case A assumes that Phobos has been in its current orbit about Mars since its formation. Case B assumes a recent capture of Phobos and the impact history of an average Main Belt Asteroid. W…
A Far-infrared Spectral Sequence of Galaxies: Trends and Models
Abel, N. P.; González-Alfonso, E.; van Hoof, P. A. M. +3 more
We present a framework for the interpretation of the far-infrared spectra of galaxies in which we have expanded the model parameters compared with previous work by varying the ionization parameter U, column density N(H), and gas density at the cloud face n(H+) for a central starburst or active galactic nucleus (AGN). We compare these mo…
Combined analysis of Hubble and VLT photometry of the intermediate mass black hole ESO 243-49 HLX-1
Maccarone, T. J.; Knigge, C.; Soria, R. +11 more
In this paper, we present a combined analysis of data obtained with the Hubble Space Telescope (HST), Very Large Telescope (VLT) and Swift X-ray telescope of the intermediate-mass black hole ESO 243-49 HLX-1 that were taken two months apart between 2010 September and November. Previous separate analyses of these data found that they were consisten…
New insights on accretion in supergiant fast X-ray transients from XMM-Newton and INTEGRAL observations of IGR J17544-2619
Hill, A. B.; Sidoli, L.; Bird, A. J. +4 more
XMM-Newton observations of the supergiant fast X-ray transient IGR J17544-2619 are reported and placed in the context of an analysis of archival INTEGRAL/IBIS data that provide a refined estimate of the orbital period at 4.9272 ± 0.0004 d. A complete outburst history across the INTEGRAL mission is reported. Although the new XMM-Newton observations…
Spectral and Timing Properties of the Black Hole X-Ray Binary H1743-322 in the Low/Hard State Studied with Suzaku
Yamaoka, K.; Done, C.; Yamada, S. +6 more
We report on the results from Suzaku observations of the Galactic black hole X-ray binary H1743-322 in the low/hard state during its outburst in 2012 October. We appropriately take into account the effects of dust scattering to accurately analyze the X-ray spectra. The time-averaged spectra in the 1-200 keV band are dominated by a hard power-law c…
Dark side of the Universe after Planck data
Cheng, Cheng; Huang, Qing-Guo
Recently released Planck data imply a smaller Hubble constant H0 than that from the Hubble Space Telescope project (HST) and a larger percentage of the matter components Ωm compared to the Supernova Legacy Survey (SNLS) in the Λ cold dark matter (CDM) model. In this paper we found that even though the tension on H0…
Hot magnetospheric O+ and cold ion behavior in magnetopause reconnection: Cluster observations
Liu, Y.; Kistler, L. M.; Mouikis, C. G. +2 more
In reconnection, the presence of heavy ions like O+ increases the ion mass density reducing the fluid's Alfvén speed. In addition, it may modify the reconnection structure, which can also change the reconnection rate. However, because O+ ions have a larger Larmor radii than H+ ions at the same velocity, they may no…