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The Grism Lens-Amplified Survey from Space (GLASS). VIII. The Influence of the Cluster Properties on Hα Emitter Galaxies at 0.3 < z < 0.7
Pentericci, Laura; Schmidt, Kasper B.; Treu, Tommaso +13 more
Exploiting the data of the Grism Lens-Amplified Survey from Space (GLASS), we characterize the spatial distribution of star formation in 76 highly active star-forming galaxies in 10 clusters at 0.3< z< 0.7. All of these galaxies are likely restricted to first infall. In a companion paper, we contrast the properties of field and cluster galax…
Predicting the magnetic vectors within coronal mass ejections arriving at Earth: 2. Geomagnetic response
Thompson, B. J.; Bothmer, V.; Richardson, I. G. +6 more
This is a companion to Savani et al. (2015) that discussed how a first-order prediction of the internal magnetic field of a coronal mass ejection (CME) may be made from observations of its initial state at the Sun for space weather forecasting purposes (Bothmer-Schwenn scheme (BSS) model). For eight CME events, we investigate how uncertainties in …
Io plasma torus ion composition: Voyager, Galileo, and Cassini
Steffl, Andrew J.; Bagenal, Fran; Nerney, Edward G.
The Io torus produces ultraviolet emissions diagnostic of plasma conditions. We revisit data sets obtained by the Voyager 1, Galileo, and Cassini missions at Jupiter. With the latest version (8.0) of the CHIANTI atomic database we analyze UV spectra to determine ion composition. We compare ion composition obtained from observations from these thre…
Outbursts of the intermediate-mass black hole HLX-1: a wind-instability scenario
Soria, Roberto; Wu, Kinwah; Zampieri, Luca +5 more
We model the intermediate-mass black hole HLX-1, using the Hubble Space Telescope, XMM-Newton and Swift. We quantify the relative contributions of a bluer component, function of X-ray irradiation, and a redder component, constant and likely coming from an old stellar population. We estimate a black hole mass {≈ } (2^{+2}_{-1}) × 10^4 M_{⊙}, a spin…
Surface roughness of Titan's hydrocarbon seas
Lorenz, Ralph D.; Cassini Radar Team; Elachi, Charles +6 more
We derive fields of solutions for the surface properties (roughness and permittivity) of the liquid hydrocarbon bodies Ligeia, Kraken and Punga Mare on Titan by applying the Radar Statistical Reconnaissance (RSR) technique to the Cassini RADAR observations in altimeter mode during the northern early summer. At the time of observation, Kraken and L…
Expanding hot flow in the black hole binary SWIFT J1753.5-0127: evidence from optical timing
Gandhi, Poshak; Tsygankov, Sergey S.; Poutanen, Juri +5 more
We describe the evolution of optical and X-ray temporal characteristics during the outburst decline of the black hole X-ray binary SWIFT J1753.5-0127. The optical/X-ray cross-correlation function demonstrates a single positive correlation at the outburst peak, then it has multiple dips and peaks during the decline stage, which are then replaced by…
Solar Ellerman Bombs in 1D Radiative Hydrodynamics
Doyle, J. G.; Mathioudakis, M.; Reid, A. +2 more
Recent observations from the Interface Region Imaging Spectrograph appear to show impulsive brightenings in high temperature lines, which when combined with simultaneous ground-based observations in Hα, appear co-spatial to Ellerman Bombs (EBs). We use the RADYN one-dimensional radiative transfer code in an attempt to try and reproduce the observe…
Detection of an ∼20 kpc coherent magnetic field in the outskirt of merging spirals: the Antennae galaxies
Mao, S. A.; Zweibel, Ellen G.; Basu, Aritra +3 more
We present a study of the magnetic field properties of NGC 4038/9 (the `Antennae' galaxies), the closest example of a late stage merger of two spiral galaxies. Wideband polarimetric observations were performed using the Karl G. Jansky Very Large Array between 2 and 4 GHz. Rotation measure synthesis and Faraday depolarization analysis was performed…
Baryons still trace dark matter: Probing CMB lensing maps for hidden isocurvature
Muñoz, Julian B.; Grin, Daniel; Smith, Tristan L. +2 more
Compensated isocurvature perturbations (CIPs) are primordial fluctuations that balance baryon and dark-matter isocurvature to leave the total matter density unperturbed. The effects of CIPs on the cosmic microwave background (CMB) anisotropies are similar to those produced by weak lensing of the CMB: smoothing of the power spectrum and generation …
Constraining f (R ) gravity with Sunyaev-Zel'dovich clusters detected by the Planck satellite
Viel, Matteo; Peirone, Simone; Raveri, Marco +2 more
Clusters of galaxies have the potential of providing powerful constraints on possible deviations from General Relativity. We use the catalog of Sunyaev-Zel'dovich (SZ) sources detected by Planck and consider a correction to the halo mass function for a f (R ) class of modified gravity models, which has been recently found to reproduce well results…