Results 31 to 40 of about 300,638 (255)

Cover Your Basis: Comprehensive Data-driven Characterization of the Binary Black Hole Population

open access: yesThe Astrophysical Journal, 2023
We introduce the first complete nonparametric model for the astrophysical distribution of the binary black hole (BBH) population. Constructed from basis splines, we use these models to conduct the most comprehensive data-driven investigation of the BBH ...
Bruce Edelman, Ben Farr, Zoheyr Doctor
doaj   +1 more source

Features of ionospheric effects from the partial solar eclipse of October 25, 2022, near the evening terminator

open access: yesВісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2023
Urgency. The ionosphere remains the main channel used by radar, radio astronomy, radio navigation, communication links, and remote radio sounding. The parameters of this channel significantly depend on the influence of high-energy sources that take place
L. F. Chernogor   +4 more
doaj   +1 more source

Faint dwarf spheroidals in the Fornax Cluster: A flat luminosity function

open access: yes, 2002
We have discovered about 70 very faint dwarf galaxies in the Fornax Cluster. These dSphs candidates follow the same magnitude-surface brightness relation as their counterparts in the Local Group, and even extend it to fainter limits.
Armandroff   +27 more
core   +1 more source

Prototype Development of the Star Sensor for the KITSAT-3 [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1995
This report presents the development procedure and the results of a prototype star sensor which can be sued as one of the attitude sensors of the KITSAT-3.
Hyunwoo Lee   +3 more
doaj  

Characteristics of small-sized space debris objects detected at the Terskol observatory in 2016-2017

open access: yesOpen Astronomy, 2018
The study of near-Earth space includes the detection and investigation of an increasing number of space debris objects by ground-based optical telescopes. There is no natural cleansing of space in the geostationary region. The telescope Zeiss-2000 with a
Levkina Polina   +7 more
doaj   +1 more source

Parameter Inference for Coalescing Massive Black Hole Binaries Using Deep Learning

open access: yesUniverse, 2023
In the 2030s, a new era of gravitational wave (GW) observations will dawn as multiple space-based GW detectors, such as the Laser Interferometer Space Antenna, Taiji, and TianQin, will open the millihertz window for GW astronomy.
Wenhong Ruan   +3 more
doaj   +1 more source

Bayesian model checking: A comparison of tests

open access: yes, 2017
Two procedures for checking Bayesian models are compared using a simple test problem based on the local Hubble expansion. Over four orders of magnitude, p-values derived from a global goodness-of-fit criterion for posterior probability density functions (
Lucy, Leon B.
core   +1 more source

Magnetic Control of Chiral Hybridized Phonon Magnetic Moments in Ferrimagnets Fe2‐xZnxMo3O8

open access: yesAdvanced Functional Materials, EarlyView.
Helicity‐resolved magneto‐Raman spectroscopy reveals magnetic control of chiral phonon magnetic moments in polar ferrimagnet (ZnxFe2−xMo3O₈). Large spontaneous zero‐field phonon splittings, selective phonon–magnon coupling, and asymmetric Zeeman responses demonstrate that phonon chirality is governed by magnon‐phonon coupling and magnetization.
Youngsu Choi   +8 more
wiley   +1 more source

Nanoscale Mapping of Plasmonic Charge Transport in Nano‐Resonators Based on Resistive Switching Materials

open access: yesAdvanced Functional Materials, EarlyView.
In this strategy, a conductive nano‐probe is employed to induce nanoscale phase transitions and map the nanoscale conductivity and trap density of GST films. By utilizing the contrasting properties of phase‐change states, nano‐resonators are fabricated that exhibit plasmonic conduction and dramatically different transport characteristics.
Sunwoo Bang   +4 more
wiley   +1 more source

Study of Integrated Far-ultraviolet Emissions from Galactic Globular Clusters Using AstroSat/UVIT Observations

open access: yesThe Astrophysical Journal
We used observations obtained with the Ultraviolet Imaging Telescope on board the AstroSat satellite to measure the integrated far-ultraviolet (FUV) and optical ( V ) magnitudes of 30 Galactic globular clusters (GCs).
Sonika Piridi   +3 more
doaj   +1 more source

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