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Hubble Frontier Fields: a high-precision strong-lensing analysis of the massive galaxy cluster Abell 2744 using ∼180 multiple images
Kneib, J. -P.; Egami, E.; Eckert, D. +11 more
We present a high-precision mass model of galaxy cluster Abell 2744, based on a strong gravitational-lensing analysis of the Hubble Space Telescope Frontier Fields (HFF) imaging data, which now include both Advanced Camera for Surveys and Wide Field Camera 3 observations to the final depth. Taking advantage of the unprecedented depth of the visibl…
CANDELS Visual Classifications: Scheme, Data Release, and First Results
Bell, Eric F.; Castellano, Marco; Kartaltepe, Jeyhan S. +49 more
We have undertaken an ambitious program to visually classify all galaxies in the five CANDELS fields down to H < 24.5 involving the dedicated efforts of over 65 individual classifiers. Once completed, we expect to have detailed morphological classifications for over 50,000 galaxies spanning 0 < z < 4 over all the fields, with classificati…
The landing(s) of Philae and inferences about comet surface mechanical properties
Auster, Hans-Ulrich; Heinisch, Philip; Güttler, Carsten +30 more
The Philae lander, part of the Rosetta mission to investigate comet 67P/Churyumov-Gerasimenko, was delivered to the cometary surface in November 2014. Here we report the precise circumstances of the multiple landings of Philae, including the bouncing trajectory and rebound parameters, based on engineering data in conjunction with operational instr…
BBN and the CMB constrain neutrino coupled light WIMPs
Nollett, Kenneth M.; Steigman, Gary
In the presence of a light weakly interacting massive particle (WIMP) with mass mχ≲30 MeV , there are degeneracies among the nature of the WIMP (fermion or boson), its couplings to the standard model particles (to electrons, positrons, and photons, or only to neutrinos), its mass mχ, and the number of equivalent (additional) …
The Kiloparsec-scale Star Formation Law at Redshift 4: Widespread, Highly Efficient Star Formation in the Dust-obscured Starburst Galaxy GN20
Daddi, E.; Walter, F.; Dannerbauer, H. +4 more
We present high-resolution observations of the 880 µm (rest-frame FIR) continuum emission in the z = 4.05 submillimeter galaxy GN20 from the IRAM Plateau de Bure Interferometer (PdBI). These data resolve the obscured star formation (SF) in this unlensed galaxy on scales of 0.''3 × 0.''2 (~2.1 × 1.3 kpc). The observations reveal a bright (16 …
Effect of UV Radiation on the Spectral Fingerprints of Earth-like Planets Orbiting M Stars
Kaltenegger, L.; Rugheimer, S.; Segura, A. +2 more
We model the atmospheres and spectra of Earth-like planets orbiting the entire grid of M dwarfs for active and inactive stellar models with Teff = 2300 K to Teff = 3800 K and for six observed MUSCLES M dwarfs with UV radiation data. We set the Earth-like planets at the 1 AU equivalent distance and show spectra from the visibl…
New constraints on f(R) gravity from clusters of galaxies
Kelly, Patrick L.; Allen, Steven W.; Rapetti, David +6 more
The abundance of massive galaxy clusters is a powerful probe of departures from general relativity (GR) on cosmic scales. Despite current stringent constraints placed by stellar and galactic tests, on larger scales alternative theories of gravity such as f(R) can still work as effective theories. Here we present constraints on two popular models o…
Relationship between Solar Energetic Particles and Properties of Flares and CMEs: Statistical Analysis of Solar Cycle 23 Events
Dalla, S.; Malandraki, O.; Tziotziou, K. +5 more
A statistical analysis of the relationship between solar energetic particles (SEPs) and properties of solar flares and coronal mass ejections (CMEs) is presented. SEP events during Solar Cycle 23 are selected that are associated with solar flares originating in the visible hemisphere of the Sun and that are at least of magnitude M1. Taking into ac…
Chains of dense cores in the Taurus L1495/B213 complex
Tafalla, M.; Hacar, A.
Context. Cloud fragmentation into dense cores is a critical step in the process of star formation. A number of recent observations show that it is connected to the filamentary structure of the gas, but the processes responsible for core formation remain mysterious.
Aims: We studied the kinematics and spatial distribution of the dense gas in t…
The Suzaku view of highly ionized outflows in AGN - II. Location, energetics and scalings with bolometric luminosity
Cappi, M.; Turner, T. J.; Tombesi, F. +4 more
Ongoing studies with XMM-Newton have shown that powerful accretion disc winds, as revealed through highly ionized Fe K-shell absorption at E ≥ 6.7 keV, are present in a significant fraction of active galactic nuclei (AGNs) in the local Universe (Tombesi et al. 2010a). In Gofford et al., we analysed a sample of 51 Suzaku-observed AGNs and independe…