Search Publications
The Dark Energy Survey Bright Arcs Survey: Candidate Strongly Lensed Galaxy Systems from the Dark Energy Survey 5000 Square Degree Footprint
Bechtol, K.; Smith, M.; Abbott, T. M. C. +79 more
We report the combined results of eight searches for strong gravitational lens systems in the full 5000 square degrees of Dark Energy Survey (DES) observations. The observations accumulated by the end of the third observing season fully covered the DES footprint in five filters (grizY), with an i-band limiting magnitude (at 10σ) of 23.44. In four …
Improving CME evolution and arrival predictions with AMR and grid stretching in Icarus
Poedts, S.; Verbeke, C.; Wijsen, N. +1 more
Context. Coronal mass ejections (CMEs) are one of the main drivers of disturbances in interplanetary space. Strong CMEs, when directed towards the Earth, cause geomagnetic storms upon interacting with the Earth's magnetic field, and can cause significant damage to our planet and affect everyday life. As such, efficient space weather prediction too…
Hard X-Ray Emission from the Eastern Jet of SS 433 Powering the W50 "Manatee" Nebula: Evidence for Particle Reacceleration
Mori, Kaya; Safi-Harb, Samar; Zhang, Shuo +12 more
We present a broadband X-ray study of W50 (the "Manatee" nebula), the complex region powered by the microquasar SS 433, that provides a test bed for several important astrophysical processes. The W50 nebula, a Galactic PeVatron candidate, is classified as a supernova remnant but has an unusual double-lobed morphology likely associated with the jet…
The Triangulum Extended (TREX) Survey: The Stellar Disk Dynamics of M33 as a Function of Stellar Age
Williams, Benjamin F.; Gilbert, Karoline M.; Chemin, Laurent +8 more
Triangulum (M33) is a low-mass, relatively undisturbed spiral galaxy that offers a new regime in which to test models of dynamical heating. In spite of its proximity, M33's dynamical heating history has not yet been well-constrained. In this work, we present the TREX Survey, the largest stellar spectroscopic survey across the disk of M33. We prese…
Serendipitous discovery of radio flaring behaviour from a nearby M dwarf with MeerKAT
Buckley, David A. H.; Osten, Rachel A.; Lintott, Chris J. +12 more
We report on the detection of MKT J174641.0-321404, a new radio transient found in untargeted searches of wide-field MeerKAT radio images centred on the black hole X-ray binary H1743-322. MKT J174641.0-321404 is highly variable at 1.3 GHz and was detected three times during 11 observations of the field in late 2018, reaching a maximum flux density…
The KOBE experiment: K-dwarfs Orbited By habitable Exoplanets. Project goals, target selection, and stellar characterization
Deleuil, M.; Aceituno, J.; Azzaro, M. +33 more
The detection of habitable worlds is one of humanity's greatest endeavors. Thus far, astrobiological studies have shown that one of the most critical components for allowing life to develop is liquid water. Its chemical properties and its capacity to dissolve and, hence, transport other substances makes this constituent a key piece in this regard.…
Near-Ultraviolet Continuum Modeling of the 1985 April 12 Great Flare of AD Leo
Kowalski, Adam F.
White-light stellar flares are now reported by the thousands in long-baseline, high-precision, broad-band photometry from missions like \emph{Kepler}, K2, and TESS. These observations are crucial inputs for assessments of biosignatures in exoplanetary atmospheres and surface ultraviolet radiation dosages for habitable zone planets around low-mass …
Thermal and non-thermal X-ray emission from the rotation-powered radio/γ-ray pulsar PSR J1740+1000
Mereghetti, Sandro; Turolla, Roberto; Zane, Silvia +4 more
We report the results of new XMM-Newton observations of the middle-aged (τc = 1.1 × 105 yr) radio pulsar PSR J1740+1000 carried out in 2017-2018. These long pointings (~530 ks) show that the non-thermal emission, well described by a power-law spectrum with photon index Γ = 1.80 ± 0.17, is pulsed with a ~30 per cent pulsed fra…
Detection of Near-infrared Water Ice at the Surface of the (Pre)Transitional Disk of AB Aur: Informing Icy Grain Abundance, Composition, and Size
Pinte, C.; Ménard, F.; Duchêne, G. +17 more
We present near-infrared Large Binocular Telescope LMIRCam imagery of the disk around the Herbig Ae/Be star AB Aurigae. A comparison of the surface brightness at K s (2.16 µm), H2O narrowband (3.08 µm), and $L^{\prime} $ (3.7 µm) allows us to probe the presence of icy grains in this (pre)transitional disk …
WISDOM Project - XIII. Feeding molecular gas to the supermassive black hole in the starburst AGN-host galaxy Fairall 49
Williams, Thomas G.; Cappellari, Michele; Davis, Timothy A. +5 more
The mm-Wave Interferometric Survey of Dark Object Masses (WISDOM) is probing supermassive black holes (SMBHs) in galaxies across the Hubble sequence via molecular gas dynamics. We present the first WISDOM study of a luminous infrared galaxy with an active galactic nuclei (AGNs): Fairall 49. We use new ALMA observations of the CO(2 - 1) line with a…