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Martian magnetic storms
Luhmann, J. G.; Russell, C. T.; Li, Y. +11 more
The response of Mars to the major space weather events called interplanetary coronal mass ejections (ICMEs) is of interest for both general planetary solar wind interaction studies and related speculations on their evolutionary consequences—especially with respect to atmosphere escape. Various particle and field signatures of ICMEs have been obser…
Gas kinematics in powerful radio galaxies at z 2: Energy supply from star formation, AGN, and radio jets
Seymour, N.; De Breuck, C.; Nesvadba, N. P. H. +3 more
We compare the kinetic energy and momentum injection rates from intense star formation, bolometric AGN radiation, and radio jets with the kinetic energy and momentum observed in the warm ionized gas in 24 powerful radio galaxies at z ~ 2. These galaxies are among our best candidates for being massive galaxies near the end of their active formation…
HICOSMO: cosmology with a complete sample of galaxy clusters - II. Cosmological results
Reiprich, T. H.; Schellenberger, G.
The X-ray bright, hot gas in the potential well of a galaxy cluster enables systematic X-ray studies of samples of galaxy clusters to constrain cosmological parameters. HIFLUGCS consists of the 64 X-ray brightest galaxy clusters in the Universe, building up a local sample. Here, we utilize this sample to determine, for the first time, individual h…
Test of Parameterized Post-Newtonian Gravity with Galaxy-scale Strong Lensing Systems
Li, Xiaolei; Cai, Yongzhi; Cao, Shuo +3 more
Based on a mass-selected sample of galaxy-scale strong gravitational lenses from the SLACS, BELLS, LSD, and SL2S surveys and using a well-motivated fiducial set of lens-galaxy parameters, we tested the weak-field metric on kiloparsec scales and found a constraint on the post-Newtonian parameter γ ={0.995}-0.047+0.037 under th…
AGN-host connection at 0.5 < z < 2.5: A rapid evolution of AGN fraction in red galaxies during the last 10 Gyr
Wuyts, S.; Daddi, E.; Elbaz, D. +13 more
We explore the dependence of the incidence of moderate-luminosity (L0.5-8 keV = 1041.9-43.7 erg s-1) active galactic nuclei (AGNs) and the distribution of their accretion rates on host color at 0.5 <z < 2.5. Based on the deepest X-ray and UV-to-far-infrared data in the two The Great Observatories Origins Deep…
An X-Ray Periodicity of ∼1.8 hr in Narrow-line Seyfert 1 Galaxy Mrk 766
Zhang, Peng; Zhang, Peng-fei; Yan, Jing-zhi +2 more
In the narrow-line Seyfert 1 galaxy Mrk 766, a quasi-periodic oscillation (QPO) signal with a period of ∼6450 s is detected in the XMM-Newton data collected on 2005 May 31. This QPO signal is highly statistically significant at the ∼5σ confidence level, with a quality factor of Q=f/{{Δ }}f> 13.6. The X-ray intensity changed by a factor of 3, wi…
Mapping the Extinction Curve in 3D: Structure on Kiloparsec Scales
Peek, J. E. G.; Schlafly, E. F.; Finkbeiner, D. P. +1 more
Near-infrared spectroscopy from APOGEE and wide-field optical photometry from Pan-STARRS1 have recently made precise measurements of the shape of the extinction curve possible for tens of thousands of stars, parameterized by R(V). These measurements revealed structures in R(V) with large angular scales, which are challenging to explain in existing…
UVUDF: UV Luminosity Functions at the Cosmic High Noon
Gardner, Jonathan P.; Teplitz, Harry I.; Scarlata, Claudia +14 more
We present the rest-1500 Å UV luminosity functions (LF) for star-forming galaxies during the cosmic high noon—the peak of cosmic star formation rate at 1.5< z< 3. We use deep NUV imaging data obtained as part of the Hubble Ultra-Violet Ultra Deep Field (UVUDF) program, along with existing deep optical and NIR coverage on the HUDF. We select …
The structural and size evolution of star-forming galaxies over the last 11 Gyr
Sobral, David; Buitrago, Fernando; Afonso, José +1 more
We present new results on the evolution of rest-frame blue/UV sizes and Sérsic indices of Hα-selected star-forming galaxies over the last 11 Gyr. We investigate how the perceived evolution can be affected by a range of biases and systematics such as cosmological dimming and resolution effects. We use GALFIT and an artificial redshifting technique,…
Linear and non-linear Modified Gravity forecasts with future surveys
Kunz, Martin; Pettorino, Valeria; Martinelli, Matteo +1 more
Modified Gravity theories generally affect the Poisson equation and the gravitational slip in an observable way, that can be parameterized by two generic functions (η and µ) of time and space. We bin their time dependence in redshift and present forecasts on each bin for future surveys like Euclid. We consider both Galaxy Clustering and Weak…