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The digital global geologic map of Mars: Chronostratigraphic ages, topographic and crater morphologic characteristics, and updated resurfacing history
Hare, T. M.; Tanaka, K. L.; Robbins, S. J. +2 more
A new global geologic map of Mars has been completed in a digital, geographic information system (GIS) format using geospatially controlled altimetry and image data sets. The map reconstructs the geologic history of Mars, which includes many new findings collated in the quarter century since the previous, Viking-based global maps were published, a…
A supermassive black hole in an ultra-compact dwarf galaxy
Neumayer, Nadine; Strader, Jay; Brodie, Jean +11 more
Ultra-compact dwarf galaxies are among the densest stellar systems in the Universe. These systems have masses of up to 2 × 108 solar masses, but half-light radii of just 3-50 parsecs. Dynamical mass estimates show that many such dwarfs are more massive than expected from their luminosity. It remains unclear whether these high dynamical …
Metallicity evolution, metallicity gradients, and gas fractions at z ~ 3.4
Cimatti, A.; Maiolino, R.; Pentericci, L. +9 more
We used near-infrared integral field spectroscopic observations from the AMAZE and LSD ESO programs to constrain the metallicity in a sample of 40 star-forming galaxies at 3 < z < 5 (most of which are at z ~ 3.4). We measured metallicities by exploiting strong emission-line diagnostics. We found that a significant fraction of star-forming ga…
An Atlas of Galaxy Spectral Energy Distributions from the Ultraviolet to the Mid-infrared
Imanishi, Masatoshi; Peek, J. E. G.; Moustakas, John +6 more
We present an atlas of 129 spectral energy distributions for nearby galaxies, with wavelength coverage spanning from the ultraviolet to the mid-infrared. Our atlas spans a broad range of galaxy types, including ellipticals, spirals, merging galaxies, blue compact dwarfs, and luminous infrared galaxies. We have combined ground-based optical drift-s…
Evidence for Wide-spread Active Galactic Nucleus-driven Outflows in the Most Massive z ~ 1-2 Star-forming Galaxies
Wuyts, E.; Berta, S.; Lutz, D. +35 more
In this paper, we follow up on our previous detection of nuclear ionized outflows in the most massive (log(M */M ⊙) >= 10.9) z ~ 1-3 star-forming galaxies by increasing the sample size by a factor of six (to 44 galaxies above log(M */M ⊙) >= 10.9) from a combination of the SINS/zC-SINF, LUCI, GNIRS…
The Laniakea supercluster of galaxies
Tully, R. Brent; Pomarède, Daniel; Hoffman, Yehuda +1 more
Galaxies congregate in clusters and along filaments, and are missing from large regions referred to as voids. These structures are seen in maps derived from spectroscopic surveys that reveal networks of structure that are interconnected with no clear boundaries. Extended regions with a high concentration of galaxies are called `superclusters', alt…
The link between shocks, turbulence, and magnetic reconnection in collisionless plasmas
Sibeck, D.; Nykyri, K.; Daughton, W. +11 more
Global hybrid (electron fluid, kinetic ions) and fully kinetic simulations of the magnetosphere have been used to show surprising interconnection between shocks, turbulence, and magnetic reconnection. In particular, collisionless shocks with their reflected ions that can get upstream before retransmission can generate previously unforeseen phenome…
The COS-Dwarfs Survey: The Carbon Reservoir around Sub-L* Galaxies
Tripp, Todd M.; Kollmeier, Juna A.; Prochaska, J. Xavier +12 more
We report new observations of circumgalactic gas from the COS-Dwarfs survey, a systematic investigation of the gaseous halos around 43 low-mass z <= 0.1 galaxies using background QSOs observed with the Cosmic Origins Spectrograph. From the projected one-dimensional and two-dimensional distribution of C IV absorption, we find that C IV is detect…
Prevalence of small-scale jets from the networks of the solar transition region and chromosphere
Weber, M.; Peter, H.; Golub, L. +24 more
As the interface between the Sun’s photosphere and corona, the chromosphere and transition region play a key role in the formation and acceleration of the solar wind. Observations from the Interface Region Imaging Spectrograph reveal the prevalence of intermittent small-scale jets with speeds of 80 to 250 kilometers per second from the narrow brig…
High-density Circumstellar Interaction in the Luminous Type IIn SN 2010jl: The First 1100 Days
Smith, Nathan; France, Kevin; Fransson, Claes +16 more
Hubble Space Telescope and ground-based observations of the Type IIn supernova (SN) 2010jl are analyzed, including photometry and spectroscopy in the ultraviolet, optical, and near-IR bands, 26-1128 days after first detection. At maximum, the bolometric luminosity was ~3 × 1043 erg s-1 and even at 850 days exceeds 1042