Search Publications
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…
Detection of Hundreds of New Planet Candidates and Eclipsing Binaries in K2 Campaigns 0-8
Kruse, Ethan; Foreman-Mackey, Daniel; Luger, Rodrigo +1 more
We implement a search for exoplanets in campaigns zero through eight (C0-8) of the K2 extension of the Kepler spacecraft. We apply a modified version of the QATS planet search algorithm to K2 light curves produced by the EVEREST pipeline, carrying out the C0-8 search on 1.5 × 105 target stars with magnitudes in the range of Kp = 9-15. W…
The Evolution of the Quenching of Star Formation in Cluster Galaxies since z ∼ 1
Muzzin, A.; Wilson, G.; Yee, H. K. C. +2 more
We study the star-forming (SF) population of galaxies within a sample of 209 IR-selected galaxy clusters at 0.3 ≤ z ≤ 1.1 in the ELAIS-N1 and XMM-LSS fields, exploiting the first HSC-SSP data release. The large area and depth of these data allow us to analyze the dependence of the SF fraction, f SF, on stellar mass and environment separ…
A measurement of the Hubble constant from angular diameter distances to two gravitational lenses
Fassnacht, Christopher D.; Hilbert, Stefan; Suyu, Sherry H. +3 more
The local expansion rate of the Universe is parametrized by the Hubble constant, H0, the ratio between recession velocity and distance. Different techniques lead to inconsistent estimates of H0. Observations of Type Ia supernovae (SNe) can be used to measure H0, but this requires an external calibrator to convert relative distances to absolute one…
Cloudlet capture by transitional disk and FU Orionis stars
Kramer, M.; Fukagawa, M.; Dullemond, C. P. +3 more
After its formation, a young star spends some time traversing the molecular cloud complex in which it was born. It is therefore not unlikely that, well after the initial cloud collapse event which produced the star, it will encounter one or more low mass cloud fragments, which we call "cloudlets" to distinguish them from full-fledged molecular clo…
A search for accreting young companions embedded in circumstellar disks. High-contrast Hα imaging with VLT/SPHERE
Pinte, C.; van der Plas, G.; Quanz, S. P. +37 more
Context. In recent years, our understanding of giant planet formation progressed substantially. There have even been detections of a few young protoplanet candidates still embedded in the circumstellar disks of their host stars. The exact physics that describes the accretion of material from the circumstellar disk onto the suspected circumplanetar…