Results 51 to 60 of about 148 (122)

High Optical-to-X-Ray Polarization Ratio Reveals Compton Scattering in BL Lacertae’s Jet

open access: yesThe Astrophysical Journal Letters
Blazars, supermassive black hole systems with highly relativistic jets aligned with the line of sight, are the most powerful long-lived emitters of electromagnetic emission in the Universe.
Iván Agudo   +149 more
doaj   +1 more source

First Very Long Baseline Interferometry Detections at 870 μm

open access: yesThe Astronomical Journal
The first very long baseline interferometry (VLBI) detections at 870 μ m wavelength (345 GHz frequency) are reported, achieving the highest diffraction-limited angular resolution yet obtained from the surface of the Earth and the highest-frequency ...
Alexander W. Raymond   +278 more
doaj   +1 more source

First Sagittarius A* Event Horizon Telescope Results. VII. Polarization of the Ring

open access: yesThe Astrophysical Journal Letters
The Event Horizon Telescope observed the horizon-scale synchrotron emission region around the Galactic center supermassive black hole, Sagittarius A* (Sgr A*), in 2017. These observations revealed a bright, thick ring morphology with a diameter of 51.8 ±
The Event Horizon Telescope Collaboration   +285 more
doaj   +1 more source

Linking Psychosocial Stress Events, Psychological Disorders and Childhood Obesity. [PDF]

open access: yesChildren (Basel), 2021
Rojo M   +6 more
europepmc   +1 more source

First Sagittarius A* Event Horizon Telescope Results. VIII. Physical Interpretation of the Polarized Ring

open access: yesThe Astrophysical Journal Letters
In a companion paper, we present the first spatially resolved polarized image of Sagittarius A* on event horizon scales, captured using the Event Horizon Telescope, a global very long baseline interferometric array operating at a wavelength of 1.3 mm ...
The Event Horizon Telescope Collaboration   +286 more
doaj   +1 more source

First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring

open access: yesThe Astrophysical Journal Letters, 2019
The Event Horizon Telescope (EHT) has mapped the central compact radio source of the elliptical galaxy M87 at 1.3 mm with unprecedented angular resolution. Here we consider the physical implications of the asymmetric ring seen in the 2017 EHT data.
The Event Horizon Telescope Collaboration   +221 more
doaj   +1 more source

X-Ray and Multiwavelength Polarization of Mrk 501 from 2022 to 2023

open access: yesThe Astrophysical Journal
We present multiwavelength polarization measurements of the luminous blazar Mrk 501 over a 14 month period. The 2–8 keV X-ray polarization was measured with the Imaging X-ray Polarimetry Explorer (IXPE) with six 100 ks observations spanning from 2022 ...
Chien-Ting J. Chen   +145 more
doaj   +1 more source

Tracking Down the Broadband Polarimetric Properties of PG 1553+113

open access: yesThe Astrophysical Journal
We report on a nine-month monitoring campaign of the blazar PG 1553+113, relying on three observations carried out in 2025 with the Imaging X-ray Polarimetry Explorer (IXPE) and supported by multiwavelength facilities.
Riccardo Middei   +80 more
doaj   +1 more source

En la senda de Murillo. Tovar y la Divina Pastora

open access: yes
El calibre de la fgura de fray Juan Bautista de Ardales (O. F. M. Cap.), en el contexto religioso y cultural de la Andalucía de la primera mitad del siglo XX, fue realmente destacado. Así supo plasmarlo Enrique Orce en este retrato, realizado en 1942 .
Infante-Limón, Enrique   +1 more
openaire   +4 more sources

X-Ray Polarization of the High-synchrotron-peak BL Lacertae Object 1ES 1959+650 during Intermediate and High X-Ray Flux States

open access: yesThe Astrophysical Journal
We report the Imaging X-ray Polarimetry Explorer (IXPE) polarimetric and simultaneous multiwavelength observations of the high-energy-peaked BL Lacertae object (HBL) 1ES 1959+650, performed in 2022 October and 2023 August.
Luigi Pacciani   +132 more
doaj   +1 more source

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