Results 71 to 80 of about 64,072 (295)
Discovery of a new gravitational lens [PDF]
The Astrophysical Journal, 1984 On a trouve que le QSO double, faible 1635+267 A, B est pratiquement au meme deplacement vers le rouge z=1,961±0,003. La difference des deplacements vers le rouge, determinee par une technique de correlation croisee est de (3,2±8,5)×10 −4 , correspondant a une difference de vitesses de (33±86) kms −1 seulement. Cette faible valeur et la similitude des
Djorgovski, S., Spinrad, H.
openaire +2 more sources
Complexity Analysis of Bubble Plumes in Power Law Fluids Based on Chaos Theory
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT In order to reveal the complexity of the internal flow of bubble plume in power law fluid, the flow characteristics and chaotic characteristics of plume are studied by experiment and theory. The chaotic characteristic parameters (correlation dimension D, K entropy, and Lyapunov exponent λ) of gas velocity under different superficial gas ...
Xin Dong +6 more
wiley +1 more source
Revisiting a Quasar Microlensing Event Towards AGN J1249+3449
UniverseThe gravitational wave event GW190521 seems to be the only BH merger event possibly correlated with an electromagnetic counterpart, which appeared about 34 days after the GW event.
Mario Cazzolla +3 more
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The gravitational lens equation [PDF]
, 2003 Questo lavoro di tesi discute approfondimenti teorici ed applicazioni cosmografiche dell'equazione della lente gravitazionale. Questa è l'equazione fondamentale del lensing gravitazionale, la teoria che descrive la deflessione della luce causata da campi gravitazionali.
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Anatomical Sciences Education, EarlyView.Abstract While gamified learning platforms show promise for engaging digital learners and promoting active learning, evidence of their effectiveness in predicting academic outcomes remains limited. This study examined how engagement patterns and incentives impact academic outcomes in a gamified environment to determine whether a formative question bank
Mohammad Aldalou +5 more
wiley +1 more source
Multimodal multi-output ordinal regression for discovering gravitationally-lensed transients
Machine Learning: Science and TechnologyGravitational lenses are caused by massive astronomical objects that distort space-time, bending light. They can distort transient astrophysical events, such as supernovae (SN), which are the subject of extensive study.
Nicolò Oreste Pinciroli Vago +1 more
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Auto-detection of strong gravitational lenses using convolutional neural networks
Emergent Scientist, 2018 We propose a method for the automated detection of strong galaxy-galaxy gravitational lenses in images, utilising a convolutional neural network (CNN) trained on 210 000 simulated galaxy-galaxy lens and non-lens images.
Pearson James +2 more
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CTQ 414: A New Gravitational Lens
, 1999 We report the discovery and ground based observations of the new gravitational lens CTQ 414. The source quasar lies at a redshift of z = 1.29 with a B magnitude of 17.6.
Alan Dressler +8 more
core +2 more sources
Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events
Astronomische Nachrichten, EarlyView.ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay +4 more
wiley +1 more source
Detecting Dark Objects with Plasma Microlensing by Their Gravitational Wakes
The Astrophysical JournalA moving mass makes a gravitational wake in the partially ionized interstellar medium, which acts as a lens for radio-frequency light. Consequently, plasma microlensing could complement gravitational microlensing in the search for invisible massive ...
M. Sten Delos
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