Search Publications
Candidate cosmic filament in the GJ526 field, mapped with the NIKA2 camera
Berta, S.; Aussel, H.; Adam, R. +44 more
Distinctive large-scale structures have been identified in the spatial distribution of optical galaxies up to redshift z ∼ 1. In the more distant universe, the relationship between the dust-obscured population of star-forming galaxies observed at millimetre wavelengths and the network of cosmic filaments of dark matter apparent in all cosmological…
A Taxonomy for the Configurations of Quadruply Lensed Quasars
Schechter, Paul L.
A simple, novice-friendly scheme for classifying the image configurations of quadruply lensed quasars is proposed. With only six classes, it is intentionally coarse grained. It focuses on the kitelikeness and circularity of these configurations, or the absence thereof. Other features are deliberately ignored, their importance to professional astro…
Infrared Line Emissions from Atoms and Atomic Ions in NGC 7027: Improved Wavelength Determinations for Infrared Metal Lines and a Probable Detection of Zn5+
Neufeld, David A.
An infrared L- and M-band spectral survey, performed toward the young planetary nebula NGC 7027 with the iSHELL instrument on NASA's Infrared Telescope Facility (IRTF), has revealed more than 20 vibrational lines of the molecules HeH+, H2, and CH+ and more than 50 spectral lines of atoms and atomic ions. The presen…
A new estimate of galaxy mass-to-light ratios from flexion lensing statistics
Fabritius, Joseph M.; Goldberg, David M.
We perform a flexion-based weak gravitational analysis of the first two Hubble Frontier Field clusters: Abell 2744 and MACS 0416. A parametric method for using radially projected flexion signals as a probe of cluster member mass is described in detail. The normalization and slope of a L - θE (as a proxy for L - σ) scaling relation in ea…
Localization of cosmic gamma-ray bursts in interplanetary space with MGNS/BepiColombo and HEND/Mars Odyssey experiments
Golovin, D. V.; Kozyrev, A. S.; Litvak, M. L. +3 more
This paper describes the methods and results for the localization by triangulation of cosmic gamma-ray bursts (GRBs) independently observed by two space experiments: the Mercury Gamma-ray and Neutron Spectrometer (MGNS) and the High Energy Neutron Detector (HEND). MGNS is onboard the MPO/BepiColombo mission and on a stage of cruise to Mercury wher…
Ensemble Numerical Simulations of Realistic SEP Events and the Inspiration for Space Weather Awareness
Li, Gang; Wang, Xin; Luo, Bingxian +5 more
The solar energetic particle (SEP) event is a kind of hazardous space weather phenomena, so its quantitative forecast is of great importance from the aspect of space environmental situation awareness. We present here a set of SEP forecast tools, which consists of three components : (1) a simple polytropic solar wind model to estimate the backgroun…
The harsh environment where exoplanets live
Pillitteri, Ignazio
On Low Hubble Expansion Rate from Planck Data Anomalies
Capistrano, Abraão J. S.; Cabral, Luís A.; Marão, José A. P. F. +1 more
From the linear perturbations of Nash–Greene fluctuations of a background metric, we obtain profiles of Hubble function evolution H(z) and fσ8(z) measurements as compared with the ΛCDM results at intermediate redshifts 0.1<z<1. For parameter estimation, we use joint data from Planck Cosmic Microwave Background (CMB) likelihoods of CMB temper…
Recalculated Orbits Of Binaries and New Linear Solutions
Cvetković, Z.; Pavlović, R.
In this paper we present recalculated orbital elements for nine binaries: EGG 2Aa, Ab, COU 1085, COU 1897, COU 1006, A 578Aa, Ab, A 1400, A 606, BU 984, and BU 992. Seven binaries have orbital periods longer than 100 yr, and two binaries have shorter orbital periods, 38 and 76 yr. Also, we present linear solutions determined for three double stars…
Solar occultation observations of Saturn's rings with Cassini UVIS
Colwell, J. E.; Esposito, L. W.; Becker, T. M. +2 more
The Ultraviolet Imaging Spectrograph (UVIS) instrument onboard the Cassini spacecraft observed 41 solar occultations by Saturn's rings through its extreme ultraviolet (56-118 nm) spectrographic channel. These solar occultations complement the set of stellar occultations measured by the broadband UVIS High Speed Photometer in the far ultraviolet (1…