Results 91 to 100 of about 101,827 (259)
Odessa Astronomical Publications, 2012 On radio telescope "URAN-4" of the Odessa observatory of Radio-astronomical Institute during twenty five years (since 1987 till present) monitoring of power galactic and extragalactic radio sources on frequencies 25 and 20MHz has been carried out.
L. Guglya +3 more
doaj +1 more source
Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.Abstract We present James Webb Space Telescope observations of the globular cluster NGC 6397 and use them to extend to infrared wavelengths the characterization of the cluster's entire white dwarf (WD) cooling sequence (CS). The data allows us to probe fundamental astrophysical WD properties and to search for evidence in their colors for (or against ...
L. R. Bedin +11 more
wiley +1 more source
Impact of polarised extragalactic sources on the measurement of CMBB-mode anisotropies [PDF]
Astronomy & Astrophysics, 2019 One of the main goals of cosmology is to search for the imprint of primordial gravitational waves in the polarisation filed of the cosmic microwave background to probe inflation theories.
G. Lagache +4 more
semanticscholar +1 more source
Polarization rotator events in southern extragalactic active radio sources [PDF]
, 2022 Quasilinear rotations in the polarization position angle of two extragalactic active radio sources have been observed recently at 1435 MHz. The observations may be interpreted in terms of relativistic jet models.
Romero, Gustavo Esteban +1 more
core
Lessons from the apparent peculiar nature of the star TYC 6544‐3483‐1
Astronomische Nachrichten, Volume 345, Issue 4, May 2024.Abstract We report a radio and optical study of the star TYC 6544‐3483‐1 originally selected as a follow‐up target in the course of our efforts to cross‐identify Galactic high‐energy sources. The star by itself finally turned out to be a very ordinary main‐sequence star despite the initial expectations that apparently pointed to the contrary.
Josep Martí +5 more
wiley +1 more source
THE ATACAMA COSMOLOGY TELESCOPE: EXTRAGALACTIC SOURCES AT 148 GHz IN THE 2008 SURVEY [PDF]
, 2011 We report on extragalactic sources detected in a 455 deg² map of the southern sky made with data at a frequency of 148 GHz from the Atacama Cosmology Telescope (ACT) 2008 observing season.
David Hughes
core
The Astrophysical JournalThe relation between Faraday rotation measure (RM) and differential Faraday rotation by unresolved structure of a turbulent plasma is investigated for extragalactic radio sources.
Jeroen M. Stil
doaj +1 more source
MAGNETIC FIELDS IN LARGE-DIAMETER H ii REGIONS REVEALED BY THE FARADAY ROTATION OF COMPACT EXTRAGALACTIC RADIO SOURCES [PDF]
, 2011 We present a study of the line-of-sight magnetic fields in five large-diameter Galactic H ii regions. Using the Faraday rotation of background polarized radio sources, as well as dust-corrected Hα surface brightness as a probe of electron density, we ...
L. Harvey-Smith, G. Madsen, B. Gaensler
semanticscholar +1 more source
Effects of Forbush Decreases on the Global Electric Circuit
Space Weather, Volume 22, Issue 4, April 2024.Abstract The suppression of high‐energy cosmic rays, known as Forbush decreases (FDs), represents a promising factor in influencing the global electric circuit (GEC) system. Researchers have delved into these effects by examining variations, often disruptive, of the potential gradient (PG) in ground‐based measurements taken in fair weather regions.
J. Tacza, G. Li, J.‐P. Raulin
wiley +1 more source
Updating the First CHIME/FRB Catalog of Fast Radio Bursts with Baseband Data
The Astrophysical JournalIn 2021, a catalog of 536 fast radio bursts (FRBs) detected with the Canadian Hydrogen Intensity Mapping Experiment (CHIME) radio telescope was released by the CHIME/FRB Collaboration.
The CHIME/FRB Collaboration +59 more
doaj +1 more source