Results 21 to 30 of about 177 (112)

Direct Imaging of the Cosmic Battery in M87*? Not Yet

open access: yesGalaxies, 2022
One of the fundamental conclusions of the Cosmic Battery (a means for producing poloidal magnetic flux in the vicinity of a black hole via the Poynting-Robertson effect on the accretion disk) is that it determines the direction of the axial magnetic ...
Ioannis Contopoulos   +3 more
doaj   +1 more source

“Cheíta” Quintana… algo diferente

open access: yesMayéutica: Revista Científica de Humanidades y Artes, 2023
Cheíta Quintana fue ­ y seguirá siendo ­ una de las voces líricas más reconocidas y emblemáticas de la escena musical venezolana. Si bien su ámbito fue nacional, hizo suyo, con interés denodado, su terruño, el estado Lara, Venezuela, dedicando a él la
Aquiles Machado
doaj   +1 more source

CARACTERÍSTICAS DE LA PRÁCTICA FÍSICO-DEPORTIVA DEL ALUMNADO CON DISCAPACIDAD DE LA UNIVERSITAT DE VALÈNCIA

open access: yesE-balonmano.com: Revista de Ciencias del Deporte, 2015
En la actualidad, la actividad físico-deportiva es fundamental para las personas con discapacidad debido a los múltiples beneficios físicos, psicológicos y sociales que aporta (Patel y Greydanus, 2010; Slater y Meade, 2004).
Joan Úbeda Colomer   +3 more
doaj   +2 more sources

Millimetre Observations of Maser-Emitting Planetary Nebulae

open access: yesGalaxies, 2022
Observations in the millimetre bands of maser-emitting planetary nebulae (PNe) are crucial to study their circumstellar molecular gas at the beginning of the PN phase.
Lucero Uscanga   +9 more
doaj   +1 more source

El profe Justo

open access: yesEntretextos, 2021
Así llamaban, llaman y seguirán llamando sus discípulos, que fueron muchos, al profe- sor emérito de la Universidad de La Guajira, de la que también fue rector ejemplar, a quien en vida respondía al nombre de Francisco Justo Pérez van-Leenden.
Amylkar Acosta Medina
doaj  

MOMO. VI. Multifrequency Radio Variability of the Blazar OJ 287 from 2015 to 2022, Absence of Predicted 2021 Precursor-flare Activity, and a New Binary Interpretation of the 2016/2017 Outburst

open access: yesThe Astrophysical Journal, 2023
Based on our dedicated Swift monitoring program, MOMO, OJ 287 is one of the best-monitored blazars in the X-ray–UV–optical regime. Here, we report results from our accompanying, dense, multifrequency (1.4–44 GHz) radio monitoring of OJ 287 between 2015 ...
S. Komossa   +14 more
doaj   +1 more source

A Search for Pulsars around Sgr A* in the First Event Horizon Telescope Data Set

open access: yesThe Astrophysical Journal, 2023
In 2017 the Event Horizon Telescope (EHT) observed the supermassive black hole at the center of the Milky Way, Sagittarius A* (Sgr A*), at a frequency of 228.1 GHz ( λ = 1.3 mm).
Pablo Torne   +284 more
doaj   +1 more source

Comparison of Polarized Radiative Transfer Codes Used by the EHT Collaboration

open access: yesThe Astrophysical Journal, 2023
Interpretation of resolved polarized images of black holes by the Event Horizon Telescope (EHT) requires predictions of the polarized emission observable by an Earth-based instrument for a particular model of the black hole accretion system.
Ben S. Prather   +273 more
doaj   +1 more source

IMPACTS OF GEOGRAPHICAL INDICATION FROM THE ARTISAN’S POINT OF VIEW

open access: yesRevista INGI, 2018
A Indicação Geográfica (IG) está associada ao registro de determinado produto ou serviço, cuja origem gera uma identidade distinta. Essa singularidade tende a causar uma valorização deste produto ou serviço, com possíveis impactos no desenvolvimento ...
Adeline Amorim Santos   +1 more
doaj  

Millimeter Light Curves of Sagittarius A* Observed during the 2017 Event Horizon Telescope Campaign

open access: yesThe Astrophysical Journal Letters, 2022
The Event Horizon Telescope (EHT) observed the compact radio source, Sagittarius A* (Sgr A*), in the Galactic Center on 2017 April 5–11 in the 1.3 mm wavelength band.
Maciek Wielgus   +266 more
doaj   +1 more source

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