Results 71 to 80 of about 89,753 (219)
Highlights of Astronomy, 1974 AbstractThe present structure and recent changes in Cas A are discussed. On the deepest available exposures the optical remnant of this supernova is seen to consist of an almost complete shell. The southern part of this shell is outlined by knots that have developed during the last decade.
openaire +2 more sources
Gravitational Radiation From Binary Systems With Time Varying Masses
Annalen der Physik, Volume 538, Issue 8, August 2026.We extend the standard approach pioneered in the works by Peters and Mathews to include the mass loss processes of the binary components, by obtaining the variations due to gravitational radiation of the main physical parameters. As an application of our results we consider gravitational radiation emission in binary magnetar systems.
Teodora M. Matei +2 more
wiley +1 more source
Excited-State OH Masers and Supernova Remnants [PDF]
, 2008 The collisionally pumped, ground-state 1720 MHz maser line of OH is widely recognized as a tracer for shocked regions and observed in star-forming regions and supernova remnants.
Pihlström, Ylva M. +5 more
core +1 more source
The origin of cosmic rays and TeV gamma-ray astronomy
EPJ Web of Conferences, 2013 Cosmic rays are accelerated to high energies in Galactic and extragalactic objects like Supernova remnants (SNR) and active galactic nuclei (AGN). How these accelerators work and how efficient they accelerate different types of particles to energies of ...
Maier Gernot
doaj +1 more source
The ORCA‐TWIN qCMOS Experiment I. Science Case and Commissioning at Calar Alto Observatory
Astronomische Nachrichten, Volume 347, Issue 7, August 2026.ABSTRACT We describe a pilot study to explore a new generation of fast and low noise CMOS image sensors for time domain astronomy, using two remote telescopes with a baseline of 1635 km. The experiment involves direct imaging with novel qCMOS image sensor technology that combines fast readout with sub‐electron readout noise.
Martin M. Roth +20 more
wiley +1 more source
Life on Mars? The physiological perspective
Experimental Physiology, EarlyView.
Ronan M. G. Berg, Damian M. Bailey
wiley +1 more source
Drug Development Research, Volume 87, Issue 5, August 2026.ABSTRACT A novel series of 5‐chloro‐N‐alkyl‐1′,1″‐dimethyl‐4′‐aryldispiro[indene‐2,3′‐pyrrolidine‐2′,3″‐indoline]−1,2″(3H)‐diones (4a–r) was rationally designed and synthesized via a one‐pot multicomponent reaction of N‐alkylated 5‐chloroisatin derivatives, 2‐(arylmethylidene)−2,3‐dihydro‐1H‐inden‐1‐ones (2a–i), and sarcosine (3).
Aisha A. Alsfouk +7 more
wiley +1 more source
EcoEnergy, Volume 4, Issue 4, August 2026.We develop a highly cost‐effective heterogeneous catalyst for efficient CO2 conversion to propiolic acid under mild conditions via a nano‐confined approach with porous MIL support. ABSTRACT Efficient conversion of carbon dioxide to organics has been a promising outlet for value‐added carbon dioxide consumption.
Bin Lei +6 more
wiley +1 more source
European Journal of Inorganic Chemistry, Volume 29, Issue 22, 1 August 2026.New bis(amide) aminophenolate ligands form dioxomolybdenum(vi) and dioxotungsten(vi) complexes showing solvent‐dependent nuclearity. Whilst monomeric complexes featuring methoxide ligands are obtained in methanol, water triggers formation of μ‐oxo‐bridged dimers via oxo exchange, verified by 18O labelling.
Pasi Vikberg +3 more
wiley +1 more source
An investigation of some contemporary problems in astronomy and astrophysics by way of early astronomical records [PDF]
, 1988 Early astronomical records of comets, supernovae, novae, sunspots and aurorae from Far Eastern dynastic histories together with records from Babylonians cuneiform tablets are compiled and analysed.
Yau, Kevin Kam Ching
core