Search Publications
Missions
Journals
Publication Years
Testing the Recovery of Intrinsic Galaxy Sizes and Masses of z ∼ 2 Massive Galaxies Using Cosmological Simulations
Barro, Guillermo; Faucher-Giguère, Claude-André; Kriek, Mariska +5 more
Accurate measurements of galaxy masses and sizes are key to tracing galaxy evolution over time. Cosmological zoom-in simulations provide an ideal test bed for assessing the recovery of galaxy properties from observations. Here, we utilize galaxies with {M}* ∼ {10}10{--}{10}11.5 {M}⊙ at z ∼ 1.7-2 from th…
Recurrence rate and magma effusion rate for the latest volcanism on Arsia Mons, Mars
Richardson, Jacob A.; Wilson, James A.; Connor, Charles B. +2 more
Magmatism and volcanism have evolved the Martian lithosphere, surface, and climate throughout the history of Mars. Constraining the rates of magma generation and timing of volcanism on the surface clarifies the ways in which magma and volcanic activity have shaped these Martian systems. The ages of lava flows on other planets are often estimated u…
The Green Bank Ammonia Survey: Observations of Hierarchical Dense Gas Structures in Cepheus-L1251
Caselli, Paola; Di Francesco, James; Rosolowsky, Erik +20 more
We use Green Bank Ammonia Survey observations of NH3 (1, 1) and (2, 2) emission with 32″ FWHM resolution from a ∼10 pc2 portion of the Cepheus-L1251 molecular cloud to identify hierarchical dense gas structures. Our dendrogram analysis of the NH3 data results in 22 top-level structures, which reside within 13 lower…
Sagittarius A* High-energy X-Ray Flare Properties during NuSTAR Monitoring of the Galactic Center from 2012 to 2015
Hailey, Charles J.; Mori, Kaya; Zhang, Shuo +17 more
Understanding the origin of the flaring activity from the Galactic center supermassive black hole Sagittarius A* is a major scientific goal of the NuSTAR Galactic plane survey campaign. We report on the data obtained between 2012 July and 2015 April, including 27 observations on Sgr A*, with a total exposure of ≃ 1 Ms. We found a total of 10 X-ray…
Multiband photometry and spectroscopy of an all-sky sample of bright white dwarfs
Geier, S.; Hermes, J. J.; Gänsicke, B. T. +11 more
The upcoming NASA Transiting Exoplanet Survey Satellite (TESS) will obtain space-based uninterrupted light curves for a large sample of bright white dwarfs distributed across the entire sky, providing a very rich resource for asteroseismological studies and the search for transits from planetary debris. We have compiled an all-sky catalogue of ult…
The ALMA Frontier Fields Survey. II. Multiwavelength Photometric analysis of 1.1 mm continuum sources in Abell 2744, MACSJ0416.1-2403 and MACSJ1149.5+2223
Kneissl, R.; Demarco, R.; Treister, E. +32 more
Context. The Hubble and Spitzer Space Telescope surveys of the Frontier Fields provide extremely deep images around six massive, strong-lensing clusters of galaxies. The ALMA Frontier Fields survey aims to cover the same fields at 1.1 mm, with maps reaching (unlensed) sensitivities of <70 µJy, in order to explore the properties of backgro…
Neutral ISM, Lyα, and Lyman-continuum in the Nearby Starburst Haro11
Hayes, Matthew; Östlin, Göran; Rivera-Thorsen, T. Emil +1 more
Star-forming galaxies are believed to be a major source of Lyman continuum (LyC) radiation responsible for reionizing the early universe. Direct observations of escaping ionizing radiation have however been sparse and with low escape fractions. In the local universe, only 10 emitters have been observed, with typical escape fractions of a few perce…
Mirror Instability in the Turbulent Solar Wind
Franci, Luca; Landi, Simone; Hellinger, Petr +2 more
The relationship between a decaying strong turbulence and the mirror instability in a slowly expanding plasma is investigated using two-dimensional hybrid expanding box simulations. We impose an initial ambient magnetic field perpendicular to the simulation box, and we start with a spectrum of large-scale, linearly polarized, random-phase Alfvénic…
Rotating Magnetic Structures Associated with a Quasi-circular Ribbon Flare
Yang, Bo; Yang, Jiayan; Bi, Yi +4 more
We present the detection of a small eruption and the associated quasi-circular ribbon flare during the emergence of a bipole occurring on 2015 February 3. Under a fan dome, a sigmoid was rooted in a single magnetic bipole, which was encircled by negative polarity. The nonlinear force-free field extrapolation shows the presence of twisted field lin…
The Frequency-dependent Damping of Slow Magnetoacoustic Waves in a Sunspot Umbral Atmosphere
Erdélyi, R.; Christian, D. J.; Krishna Prasad, S. +5 more
High spatial and temporal resolution images of a sunspot, obtained simultaneously in multiple optical and UV wavelengths, are employed to study the propagation and damping characteristics of slow magnetoacoustic waves up to transition region heights. Power spectra are generated from intensity oscillations in sunspot umbra, across multiple atmosphe…