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An EMHD soliton model for small-scale magnetic holes in magnetospheric plasmas
Pu, Zu-Yin; Xiao, Chi-Jie; Fu, Sui-Yan +6 more
Small-scale magnetic holes (SSMHs) in the magnetosphere plasma sheet are investigated in this paper. A developed electron magnetohydrodynamics (EMHD) soliton model is proposed as a new approach to SSMHs formation. The Biermann battery effect is taken into account in resolving the magnetic evolution equation with a slow-mode solution in the weak no…
Forecasting performance of CMB experiments in the presence of complex foreground contaminations
Errard, Josquin; Stompor, Radek; Poletti, Davide
We present a new, semianalytic framework for estimating the level of residuals present in cosmic microwave background (CMB) maps derived from multifrequency CMB data and forecasting their impact on cosmological parameters. The data are assumed to contain non-negligible signals of astrophysical and/or Galactic origin, which we clean using a paramet…
Statistical analysis of suprathermal electron drivers at 67P/Churyumov-Gerasimenko
Frahm, R. A.; Eriksson, A.; Henri, P. +16 more
We use observations from the Ion and Electron Sensor (IES) on board the Rosetta spacecraft to study the relationship between the cometary suprathermal electrons and the drivers that affect their density and temperature. We fit the IES electron observations with the summation of two kappa distributions, which we characterize as a dense and warm pop…
Toward a Tomographic Analysis of the Cross-Correlation between Planck CMB Lensing and H-ATLAS Galaxies
Baccigalupi, C.; Bielewicz, P.; Danese, L. +10 more
We present an improved and extended analysis of the cross-correlation between the map of the cosmic microwave background (CMB) lensing potential derived from the Planck mission data and the high-redshift galaxies detected by the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) in the photometric redshift range {z}{{ph}}≥slan…
SPOTS: The Search for Planets Orbiting Two Stars. II. First constraints on the frequency of sub-stellar companions on wide circumbinary orbits
Janson, M.; Desidera, S.; Bonavita, M. +4 more
A large number of direct imaging surveys for exoplanets have been performed in recent years, yielding the first directly imaged planets and providing constraints on the prevalence and distribution of wide planetary systems. However, like most of the radial velocity ones, these generally focus on single stars, hence binaries and higher-order multip…
Testing deviations from ΛCDM with growth rate measurements from six large-scale structure surveys at z = 0.06-1
Ho, Shirley; Silvestri, Alessandra; Alam, Shadab
We use measurements from the Planck satellite mission and galaxy redshift surveys over the last decade to test three of the basic assumptions of the standard model of cosmology, ΛCDM (Λ cold dark matter): the spatial curvature of the universe, the nature of dark energy and the laws of gravity on large scales. We obtain improved constraints on seve…
An HST Survey of the Highest-velocity Ejecta in Cassiopeia A
Milisavljevic, Dan; Fesen, Robert A.
We present Hubble Space Telescope WFC3/IR images of the Cassiopeia A supernova remnant that survey its high-velocity, S-rich debris in the NE jet and SW counterjet regions through [S III] λλ9069, 9531 and [S II] λλ10,287-10,370 line emissions. We identify nearly 3400 sulfur emitting knots concentrated in ∼120° wide opposing streams, almost triple …
Rosetta Lander - Landing and operations on comet 67P/Churyumov-Gerasimenko
Finke, Felix; Ulamec, Stephan; Biele, Jens +10 more
The Rosetta Lander Philae is part of the ESA Rosetta Mission which reached comet 67P/Churyumov-Gerasimenko after a 10 year cruise in August 2014. Since then, Rosetta has been studying both its nucleus and coma with instruments aboard the Orbiter. On November 12th, 2014 the Lander, Philae, was successfully delivered to the surface of the comet and …
Constraining Globular Cluster Age Uncertainties using the IR Color-Magnitude Diagram
Brown, Thomas M.; Gennaro, Mario; Calamida, Annalisa +2 more
Globular Clusters (GCs) in the Milky Way are the primary laboratories for establishing the ages of the oldest stellar populations and for measuring the color-magnitude relation of stars. In infrared (IR) color-magnitude diagrams (CMDs), the stellar main sequence (MS) exhibits a “kink” due to opacity effects in M dwarfs such that lower mass and coo…
The injection of ten electron/3He-rich SEP events
Krucker, Säm; Li, Gang; Mason, Glenn M. +2 more
We have derived the particle injections at the Sun for ten good electron/3He-rich solar energetic particle (SEP) events, using a 1.2 AU particle path length (suggested by analysis of the velocity dispersion). The inferred solar injections of high-energy (~10 to 300 keV) electrons and of ~MeV/nucleon ions (carbon and heavier) start with …