Search Publications
Missions
Journals
Publication Years
Multiwavelength Observations of Fast Radio Bursts
Zampieri, Luca; Turatto, Massimo; Nicastro, Luciano +3 more
The origin and phenomenology of the Fast Radio Burst (FRB) remains unknown despite more than a decade of efforts. Though several models have been proposed to explain the observed data, none is able to explain alone the variety of events so far recorded. The leading models consider magnetars as potential FRB sources. The recent detection of FRBs fr…
Magnetic helicity and energy budget around large confined and eruptive solar flares
Veronig, A. M.; Thalmann, J. K.; Gupta, M.
Context. In order to better understand the underlying processes and prerequisites for solar activity, it is essential to study the time evolution of the coronal magnetic field of solar active regions (ARs) associated with flare activity.
Aims: We investigate the coronal magnetic energy and helicity budgets of ten solar ARs around the times of…
OGLE-2018-BLG-0567Lb and OGLE-2018-BLG-0962Lb: Two Microlensing Planets through the Planetary-caustic Channel
Han, Cheongho; Udalski, Andrzej; Lee, Chung-Uk +32 more
We present the analyses of two microlensing events, OGLE-2018-BLG-0567 and OGLE-2018-BLG-0962. In both events, the short-lasting anomalies were densely and continuously covered by two high-cadence surveys. The light-curve modeling indicates that the anomalies are generated by source crossings over the planetary caustics induced by planetary compan…
HOLISMOKES. IV. Efficient mass modeling of strong lenses through deep learning
Halkola, A.; Suyu, S. H.; Cañameras, R. +4 more
Modeling the mass distributions of strong gravitational lenses is often necessary in order to use them as astrophysical and cosmological probes. With the large number of lens systems (≳105) expected from upcoming surveys, it is timely to explore efficient modeling approaches beyond traditional Markov chain Monte Carlo techniques that ar…
Weighing the Galactic disk using phase-space spirals. II. Most stringent constraints on a thin dark disk using Gaia EDR3
Monari, G.; de Salas, P. F.; Widmark, A. +1 more
Using the method that was developed in the first paper of this series, we measured the vertical gravitational potential of the Galactic disk from the time-varying structure of the phase-space spiral, using data from Gaia as well as supplementary radial velocity information from legacy spectroscopic surveys. For eleven independent data samples, we …
Large-amplitude variables in Gaia Data Release 2. Multi-band variability characterization
Audard, M.; Rimoldini, L.; Holl, B. +11 more
Context. Photometric variability is an essential feature that sheds light on the intrinsic properties of celestial variable sources, the more so when photometry is available in various bands. In this respect, the all-sky Gaia mission is particularly attractive as it collects, among other quantities, epoch photometry measured quasi-simultaneously i…
A Catalog of 204 Offset and Dual Active Galactic Nuclei (AGNs): Increased AGN Activation in Major Mergers and Separations under 4 kpc
Griffith, Roger L.; Stern, Daniel; Stemo, Aaron +4 more
During galaxy mergers, gas and dust are driven toward the centers of merging galaxies, triggering enhanced star formation and supermassive black hole (SMBH) growth. Theory predicts that this heightened activity peaks at SMBH separations <20 kpc; if sufficient material accretes onto one or both of the SMBHs for them to become observable as activ…
Density fluctuations associated with turbulence and waves. First observations by Solar Orbiter
Maksimovic, M.; Bale, S. D.; Chust, T. +21 more
Aims: The aim of this work is to demonstrate that the probe-to-spacecraft potential measured by RPW on Solar Orbiter can be used to derive the plasma (electron) density measurement, which exhibits both a high temporal resolution and a high level of accuracy. To investigate the physical nature of the solar wind turbulence and waves, we analyze…
The first measurement of the quasar lifetime distribution
Hennawi, Joseph F.; Worseck, Gábor; Davies, Frederick B. +1 more
Understanding the growth of the supermassive black holes (SMBH) powering luminous quasars, their co-evolution with host galaxies, and impact on the surrounding intergalactic medium (IGM) depends sensitively on the duration of quasar accretion episodes. Unfortunately, this time-scale, known as the quasar lifetime, tQ, is still uncertain …
Constraining the overcontact phase in massive binary evolution. I. Mixing in V382 Cyg, VFTS 352, and OGLE SMC-SC10 108086
Sana, Hugues; Justham, Stephen; Mahy, Laurent +10 more
Context. As potential progenitors of several exotic phenomena including gravitational wave sources, magnetic stars, and Be stars, close massive binary systems probe a crucial area of the parameter space in massive star evolution. Despite the importance of these systems, large uncertainties regarding the nature and efficiency of the internal mixing…