Search Publications
Missions
Journals
Publication Years
SN 2017gci: a nearby Type I Superluminous Supernova with a bumpy tail
Sollerman, J.; Gromadzki, M.; Jerkstrand, A. +27 more
We present and discuss the optical spectrophotometric observations of the nearby (z = 0.087) Type I superluminous supernova (SLSN I) SN 2017gci, whose peak K-corrected absolute magnitude reaches Mg = -21.5 mag. Its photometric and spectroscopic evolution includes features of both slow- and of fast-evolving SLSN I, thus favoring a contin…
Exploiting timing capabilities of the CHEOPS mission with warm-Jupiter planets
Alonso, R.; Deleuil, M.; Erikson, A. +75 more
We present 17 transit light curves of seven known warm-Jupiters observed with the CHaracterising ExOPlanet Satellite (CHEOPS). The light curves have been collected as part of the CHEOPS Guaranteed Time Observation (GTO) program that searches for transit-timing variation (TTV) of warm-Jupiters induced by a possible external perturber to shed light …
Nonequilibrium Flux Rope Formation by Confined Flares Preceding a Solar Coronal Mass Ejection
Masuda, Satoshi; Liu, Chang; Liu, Rui +3 more
We present evidence that a magnetic flux rope was formed before a coronal mass ejection (CME) and its associated long-duration flare during a pair of preceding confined eruptions and associated impulsive flares in a compound event in NOAA Active Region 12371. Extreme-ultraviolet images and the extrapolated nonlinear force-free field show that the …
Exploring the Solar Wind from Its Source on the Corona into the Inner Heliosphere during the First Solar Orbiter-Parker Solar Probe Quadrature
Telloni, Daniele; Zank, Gary P.; Susino, Roberto +68 more
This Letter addresses the first Solar Orbiter (SO)-Parker Solar Probe (PSP) quadrature, occurring on 2021 January 18 to investigate the evolution of solar wind from the extended corona to the inner heliosphere. Assuming ballistic propagation, the same plasma volume observed remotely in the corona at altitudes between 3.5 and 6.3 solar radii above …
Gravitational wave detection with photometric surveys
Doré, Olivier; Wang, Yijun; Pardo, Kris +1 more
Gravitational wave (GW) detections have considerably enriched our understanding of the universe. To date, all GW events from individual sources have been found by interferometer-type detectors. In this paper, we study a GW detection technique based on astrometric solutions from photometric surveys and demonstrate that it offers a highly flexible f…
A Stable H2O Atmosphere on Europa's Trailing Hemisphere From HST Images
Roth, Lorenz
Previous studies of the global intensities of the oxygen emissions at 1,356 Å and 1,304 Å revealed molecular oxygen (O2) in Europa's atmosphere. Here we investigate the relative changes of the two oxygen emissions when Europa emerges from eclipse as well as the radial profiles of the relative emissions across the sunlit disk in Hubble S…
The Metal-poor Metallicity Distribution of the Ancient Milky Way
Frebel, Anna; Mardini, Mohammad K.; Chiti, Anirudh +1 more
We present a low-metallicity map of the Milky Way consisting of ∼110,000 metal-poor giants with -3.5 < [Fe/H] < -0.75, based on public photometry from the second data release of the SkyMapper survey. These stars extend out to ∼7 kpc from the solar neighborhood and cover the main Galactic stellar populations, including the thick disk and the …
The nature of the extreme X-ray variability in the NLS1 1H 0707-495
Chainakun, P.; Fabian, A. C.; Pinto, C. +11 more
We examine archival XMM-Newton data on the extremely variable narrow-line Seyfert 1 active galactic nucleus (AGN) 1H 0707-495. We construct fractional excess variance (Fvar) spectra for each epoch, including the recent 2019 observation taken simultaneously with eROSITA. We explore both intrinsic and environmental absorption origins for …
Strong lens modelling: comparing and combining Bayesian neural networks and parametric profile fitting
Li, Nan; Dye, Simon; Maresca, Jacob +1 more
The vast quantity of strong galaxy-galaxy gravitational lenses expected by future large-scale surveys necessitates the development of automated methods to efficiently model their mass profiles. For this purpose, we train an approximate Bayesian convolutional neural network (CNN) to predict mass profile parameters and associated uncertainties, and …
Turbulence and wave transmission at an ICME-driven shock observed by the Solar Orbiter and Wind
Kilpua, E. K. J.; Horbury, T. S.; O'Brien, H. +10 more
Aims: An interplanetary coronal mass ejection (ICME) event was observed by the Solar Orbiter at 0.8 AU on 2020 April 19 and by Wind at 1 AU on 2020 April 20. Futhermore, an interplanetary shock wave was driven in front of the ICME. Here, we focus on the transmission of the magnetic fluctuations across the shock and we analyze the characterist…