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Coronal bright points
Madjarska, Maria S.
Coronal bright points (CBPs) are a fundamental class of solar activity. They represent a set of low-corona small-scale loops with enhanced emission in the extreme-ultraviolet and X-ray spectrum that connect magnetic flux concentrations of opposite polarities. CBPs are one of the main building blocks of the solar atmosphere outside active regions u…
ExoEarth yield landscape for future direct imaging space telescopes
Stark, Christopher C.; Mazoyer, Johan; Pueyo, Laurent +19 more
The expected yield of potentially Earth-like planets is a useful metric for designing future exoplanet-imaging missions. Recent yield studies of direct-imaging missions have focused primarily on yield methods and trade studies using "toy" models of missions. Here, we increase the fidelity of these calculations substantially, adopting more realisti…
The mean Hα EW and Lyman-continuum photon production efficiency for faint z ≈ 4-5 galaxies
Bacon, Roland; Boogaard, Leindert A.; Mahler, Guillaume +9 more
We present the first measurements of the Lyman-continuum photon production efficiency ξion, 0 at z ∼ 4-5 for galaxies fainter than 0.2 L* (-19 mag). ξion, 0 quantifies the production rate of ionizing photons with respect to the UV luminosity density assuming a fiducial escape fraction of zero. Extending previous me…
AKARI/IRC near-infrared asteroid spectroscopic survey: AcuA-spec
Hasegawa, Sunao; Onaka, Takashi; Usui, Fumihiko +1 more
Knowledge of water in the solar system is important for the understanding of a wide range of evolutionary processes and the thermal history of the solar system. To explore the existence of water in the solar system, it is indispensable to investigate hydrated minerals and/or water ice on asteroids. These water-related materials show absorption fea…
Merging Cluster Collaboration: A Panchromatic Atlas of Radio Relic Mergers
Bradač, M.; Venturi, T.; Jee, M. J. +13 more
Golovich et al. present an optical imaging and spectroscopic survey of 29 radio relic merging galaxy clusters. In this paper, we study this survey to identify substructure and quantify the dynamics of the mergers. Using a combined photometric and spectroscopic approach, we identify the minimum number of substructures in each system to describe the…
The Polycyclic Aromatic Hydrocarbon Mass Fraction on a 10 pc Scale in the Magellanic Clouds
Gordon, Karl D.; Bot, Caroline; Leroy, Adam K. +8 more
We present maps of the dust properties in the Small and Large Magellanic Clouds (SMC, LMC) from fitting Spitzer and Herschel observations with the Draine & Li dust model. We derive the abundance of the small carbonaceous grain (or polycyclic aromatic hydrocarbon; PAH) component. The global PAH fraction ({q}{{PAH}}, the fraction of t…
Cosmological constraints on an exponential interaction in the dark sector
Yang, Weiqiang; Pan, Supriya; Paliathanasis, Andronikos
Cosmological models where dark matter (DM) and dark energy (DE) interact with each other are the general scenarios in compared to the non-interacting models. The interaction is usually motivated from the phenomenological ground and thus there is no such rule to prefer a particular interaction between DM and DE. Being motivated, in this work, allow…
ALMA 26 arcmin2 Survey of GOODS-S at 1 mm (ASAGAO): Near-infrared-dark Faint ALMA Sources
Ouchi, Masami; Fujimoto, Seiji; Tamura, Yoichi +21 more
We report detections of two 1.2 mm continuum sources (S 1.2 mm ∼ 0.6 mJy) without any counterparts in the deep H- and/or K-band image (i.e., K-band magnitude ≳26 mag). These near-infrared-dark faint millimeter sources are uncovered by ASAGAO, a deep and wide-field (≃26 arcmin2) Atacama Large Millimeter/submillimeter Array (AL…
Geological Evidence of Planet-Wide Groundwater System on Mars
Ori, Gian Gabriele; Salese, Francesco; Pondrelli, Monica +2 more
The scale of groundwater upwelling on Mars, as well as its relation to sedimentary systems, remains an ongoing debate. Several deep craters (basins) in the northern equatorial regions show compelling signs that large amounts of water once existed on Mars at a planet-wide scale. The presence of water-formed features, including fluvial Gilbert and s…
The ALMA Discovery of the Rotating Disk and Fast Outflow of Cold Molecular Gas in NGC 1275
Fukazawa, Y.; Nagai, H.; Onishi, K. +13 more
We present observations using the Atacama Large Millimeter/submillimeter Array of the CO(2-1), HCN(3-2), and HCO+(3-2) lines in the nearby radio galaxy/brightest cluster galaxy (BCG) NGC 1275 with a spatial resolution of ∼20 pc. In previous observations, the CO(2-1) emission was detected as radial filaments lying in the east-west direct…