First Sagittarius A* Event Horizon Telescope Results. VI. Testing the Black Hole Metric [PDF]
Astrophysical Journal Letters, 2022 Astrophysical black holes are expected to be described by the Kerr metric. This is the only stationary, vacuum, axisymmetric metric, without electromagnetic charge, that satisfies Einstein’s equations and does not have pathologies outside of the event ...
K. Akiyama +269 more
semanticscholar +1 more source
Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A ∗ [PDF]
Classical and quantum gravity, 2022 Horizon-scale images of black holes (BHs) and their shadows have opened an unprecedented window onto tests of gravity and fundamental physics in the strong-field regime.
S. Vagnozzi +3 more
semanticscholar +1 more source
Constraint on the maximum mass of neutron stars using GW170817 event [PDF]
Physical Review D, 2019 We revisit the constraint on the maximum mass of cold spherical neutron stars coming from the observational results of GW170817. We develop a new framework for the analysis by employing both energy and angular momentum conservation laws as well as solid ...
M. Shibata +3 more
semanticscholar +1 more source
Galactic constraints on supernova progenitor models [PDF]
, 2013 Aims. To estimate the mean masses of oxygen and iron ejected per each type of supernovae (SNe) event from observations of the elemental abundance patterns in the Galactic disk and constrain the relevant SNe progenitor models. Methods.
Acharova +83 more
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Coral-bacterial communities before and after a coral mass spawning event on Ningaloo Reef. [PDF]
PLoS ONE, 2012 Bacteria associated with three coral species, Acropora tenuis, Pocillopora damicornis and Tubastrea faulkneri, were assessed before and after coral mass spawning on Ningaloo Reef in Western Australia.
Janja Ceh +4 more
doaj +1 more source
An outburst from a massive star 40 days before a supernova explosion [PDF]
, 2013 Various lines of evidence suggest that very massive stars experience extreme mass-loss episodes shortly before they explode as a supernova. Interestingly, several models predict such pre-explosion outbursts. Establishing a causal connection between these
Arcavi, I. +19 more
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A SOLAR CORONAL JET EVENT TRIGGERS A CORONAL MASS EJECTION [PDF]
The Astrophysical Journal, 2015 We present the multi-point and multi-wavelength observation and analysis on a solar coronal jet and coronal mass ejection (CME) event in this paper. Employing the GCS model, we obtained the real (three-dimensional) heliocentric distance and direction of the CME and found it propagate in a high speed over 1000 km/s .
Jiajia Liu +5 more
openaire +2 more sources
PLoS ONE, 2022 Based on an exhaustive database of gastropod genera and subgenera during the Triassic-Jurassic transition, origination and extinction percentages and resulting diversity changes are calculated, with a particular focus on the end-Triassic mass extinction ...
Mariel Ferrari, Michael Hautmann
doaj +1 more source
INFLUENCE OF ACQUAINTANCESHIP WITH A MASS EVENT RULES AND REGULATIONS ON THE PERCEPTION OF THE SELECTED ASPECTS OF SAFETY BY PARTICIPANTS [PDF]
Modern Management Review, 2017 Each and every mass event is an enormous logistics undertaking. The principal task of the organizers of a mass event is to make sure that those who participate in it are safe.
Joanna WOŹNIAK, Karol FILL
doaj +1 more source
Ogle-2018-blg-0677lb: A super earth near the galactic bulge [PDF]
, 2020 We report the analysis of the microlensing event OGLE-2018-BLG-0677. A small feature in the light curve of the event leads to the discovery that the lens is a star-planet system. Although there are two degenerate solutions that could not be distinguished
Albrow, M. D. +32 more
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