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Detection of H2O and Evidence for TiO/VO in an Ultra-hot Exoplanet Atmosphere
Nikolov, Nikolay; Drummond, Benjamin; Gibson, Neale P. +7 more
We present a primary transit observation for the ultra-hot (T eq ∼ 2400 K) gas giant expolanet WASP-121b, made using the Hubble Space Telescope Wide Field Camera 3 in spectroscopic mode across the 1.12-1.64 µm wavelength range. The 1.4 µm water absorption band is detected at high confidence (5.4σ) in the planetary atmosphere…
Bimodality of low-redshift circumgalactic O VI in non-equilibrium EAGLE zoom simulations
Tumlinson, Jason; Crain, Robert A.; Schaye, Joop +7 more
We introduce a series of 20 cosmological hydrodynamical simulations of L* (M200 = 1011.7-1012.3 M⊙) and group-sized (M200 = 1012.7-1013.3 M⊙) haloes run with the model used for the EAGLE project, which additionally includes a non-equilibrium ionization and cool…
The Link between Turbulence, Magnetic Fields, Filaments, and Star Formation in the Central Molecular Zone Cloud G0.253+0.016
Testi, L.; Federrath, C.; Bally, J. +8 more
Star formation is primarily controlled by the interplay between gravity, turbulence, and magnetic fields. However, the turbulence and magnetic fields in molecular clouds near the Galactic center may differ substantially compared to spiral-arm clouds. Here we determine the physical parameters of the central molecular zone (CMZ) cloud G0.253+0.016, …
Precise Strong Lensing Mass Modeling of Four Hubble Frontier Field Clusters and a Sample of Magnified High-redshift Galaxies
Ouchi, Masami; Shimasaku, Kazuhiro; Oguri, Masamune +2 more
We conduct precise strong lensing mass modeling of four Hubble Frontier Field (HFF) clusters, Abell 2744, MACS J0416.1-2403, MACS J0717.5+3745, and MACS J1149.6+2223, for which HFF imaging observations are completed. We construct a refined sample of more than 100 multiple images for each cluster by taking advantage of the full-depth HFF images, an…
The Herschel-ATLAS data release 1 - I. Maps, catalogues and number counts
Ivison, R. J.; Ibar, E.; Dunne, L. +11 more
We present the first major data release of the largest single key-project in area carried out in open time with the Herschel Space Observatory. The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) is a survey of 600 deg2 in five photometric bands - 100, 160, 250, 350 and 500 µm - with the Photoconductor Array Camera an…
Gravitational-Wave Cosmology across 29 Decades in Frequency
Shannon, Ryan M.; Mingarelli, Chiara M. F.; Kerr, Matthew +24 more
Quantum fluctuations of the gravitational field in the early Universe, amplified by inflation, produce a primordial gravitational-wave background across a broad frequency band. We derive constraints on the spectrum of this gravitational radiation, and hence on theories of the early Universe, by combining experiments that cover 29 orders of magnitu…
A publicly available simulation of an enhanced network region of the Sun
De Pontieu, Bart; Carlsson, Mats; Hansteen, Viggo H. +2 more
Context. The solar chromosphere is the interface between the solar surface and the solar corona. Modelling of this region is difficult because it represents the transition from optically thick to thin radiation escape, from gas-pressure domination to magnetic-pressure domination, from a neutral to an ionised state, from MHD to plasma physics, and …
A Comparison of Flare Forecasting Methods. I. Results from the “All-Clear” Workshop
Schrijver, C. J.; Zhang, J.; Leka, K. D. +15 more
Solar flares produce radiation that can have an almost immediate effect on the near-Earth environment, making it crucial to forecast flares in order to mitigate their negative effects. The number of published approaches to flare forecasting using photospheric magnetic field observations has proliferated, with varying claims about how well each wor…
Detection of an Atmosphere Around the Super-Earth 55 Cancri e
Tsiaras, A.; Waldmann, I. P.; Rocchetto, M. +8 more
We report the analysis of two new spectroscopic observations in the near-infrared of the super-Earth 55 Cancri e, obtained with the WFC3 camera on board the Hubble Space Telescope. 55 Cancri e orbits so close to its parent star that temperatures much higher than 2000 K are expected on its surface. Given the brightness of 55 Cancri, the observation…
Catalog of Ultra-diffuse Galaxies in the Coma Clusters from Subaru Imaging Data
Koda, Jin; Komiyama, Yutaka; Yagi, Masafumi +1 more
We present a catalog of ultra-diffuse galaxies (UDGs) in the Coma cluster. UDGs are a subset of low surface brightness (SB) galaxies with very large effective radii defined by van Dokkum et al. We surveyed the Subaru data archive for deep Suprime-Cam/Subaru R-band images, and used data covering the 1.°7 × 2.°7 region of the Coma cluster. The data …