Results 101 to 110 of about 6,508,993 (290)
Investigation of Stray‐Light Patterns in the eROSITA X‐Ray Cameras
Astronomische Nachrichten, EarlyView.ABSTRACT eROSITA (extended ROentgen Survey with an Imaging Telescope Array) is the soft X‐ray instrument aboard the Spectrum‐Roentgen‐Gamma (SRG) mission, developed under the responsibility of the Max Planck Institute for Extraterrestrial Physics (MPE).
Veronika Stieglitz +4 more
wiley +1 more source
Exploring X-Ray Properties of Low-metallicity Dwarf Galaxies
The Astrophysical JournalOne of the primary outstanding questions in extragalactic astronomy is the formation and early evolution of the supermassive black holes that are seen in nearly every massive galaxy.
Jenna M. Cann +5 more
doaj +1 more source
Principal Component‐Based Classification of Blazar Candidates of Uncertain Type in the 4FGL/LAT
Astronomische Nachrichten, EarlyView.ABSTRACT We adopted principal component analysis (PCA), linear discriminant analysis (LDA), and support vector machines (SVM), to study classification for a sample of 2708 Fermi blazars: 1142 BL Lac objects (BLLs), 759 flat spectrum radio quasars (FSRQs), and 807 blazar candidates of uncertain type (BCUs).
Wen‐Xin Yang +13 more
wiley +1 more source
The Czech Contribution to Future Large X-Ray Astronomy Telescopes: Recent Progress
Acta Polytechnica, 2013 We briefly review the recent status of the Czech contribution to future space X-ray astronomy missions with emphasis on the development of new technologies and test samples of X-ray mirrors with precise surfaces based on new materials and alternative ...
René Hudec +6 more
doaj
Direct SMBH Formation Driven by Runaway Stellar Collisions in Globally Unstable Stellar Systems
Astronomische Nachrichten, EarlyView.ABSTRACT The fueling problem addresses the ultimate fate of the reservoirs of gas and stars driven into the deepest gravitational potential wells of galaxies, thus it may contain the Universe's densest concentrations of gas and stars. This raises a key question: does the infalling material collapse directly into a supermassive black hole, or can it ...
Marcelo C. Vergara, Andrés Escala
wiley +1 more source
Pulsed Infrared Emission from Magnetar 4U 0142+61 Detected by JWST
The Astrophysical JournalWe report on a JWST observation of the magnetar 4U 0142+61 on 2024 August 18 with the Near-Infrared Camera (NIRCam). NIRCam observed the magnetar for 33 minutes in timing mode, providing a time resolution of 2.5 s. In the F410M filter (pivot wavelength 4.
Jeremy Hare +5 more
doaj +1 more source
The Search For Pulsar Wind Nebulae in the Very High Energy Gamma-ray Regime [PDF]
, 2010 The aim of this Thesis is to study the development of pulsar wind nebulae in the TeV regime and in doing so uncover more sources which have as yet not been observed at these wavelengths.
KEOGH, DOMINIC,ROBERT +1 more
core
, 1989 First published in 1989, this book provides a comprehensive review of the detection techniques that are used in X-ray astronomy. Since the first discovery of a cosmic X-ray source in 1962, there has been rapid growth in X-ray astronomy, which has largely
G. W. Fraser
core +1 more source
The absence of women's scientific contributions in core UK pre‐university science qualifications
British Educational Research Journal, EarlyView.Abstract Despite their groundbreaking contributions to our understanding of the natural world and the universe, women's roles in biology, chemistry, physics, astronomy, environmental science and geology remain largely absent from standard educational specifications in the United Kingdom (UK), particularly at Key Stage 4 (KS4) and Key Stage 5 (KS5), or ...
G. J. Cooke +7 more
wiley +1 more source
Detecting Exoplanet Transits with the Next Generation of X-Ray Telescopes
The Astronomical JournalDetecting exoplanet transits at X-ray wavelengths would provide a window into the effects of high-energy irradiation on the upper atmospheres of planets.
Raven Cilley +2 more
doaj +1 more source