Results 111 to 120 of about 62,844 (248)
Whole genome shotgun phylogenomics resolve the diving beetle tree of life
Systematic Entomology, EarlyView.A new and strongly supported phylogeny of diving beetles (Dytiscidae) is presented using the largest genomic dataset to date. Laccophilinae and Coptotominae + Lancetinae are early diverging lineages excluded from a large monophyletic clade comprising the remaining eight subfamilies. We identify seven remaining problems in the backbone of the phylogeny,
Johannes Bergsten +4 more
wiley +1 more source
Rates and redshift distribution of high-z supernovae [PDF]
arXiv, 1999 Using observed star formation rates at redshifts up to z ~ 5, we calculate cosmic supernova rates for core collapse and Type Ia supernovae. Together with supernova statistics and detailed light curves, we estimate the number of supernovae, and their distribution in redshift, that should be detectable in different filters with various instruments ...
arxiv
Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.Abstract The Solar, Anomalous, and Magnetospheric Explorer (SAMPEX) mission launched in July 1992 was the first NASA “Small Explorer” project. It had the goal to show how space missions could be developed much more rapidly than had become the situation in the 1980s and 1990s.
D. N. Baker, G. M. Mason
wiley +1 more source
, 2022 This proceeding contribution is a short summary of the invited talk about observational supernova science at Stockholm University that has been conducted at the Nordic Optical Telescope over the past 25 years, and some expectations for the future.
openaire +3 more sources
Combining Low‐Valent AlI and SnII Metal Centers for Small Molecule Activation
European Journal of Inorganic Chemistry, Volume 28, Issue 16, June 5, 2025.Salt metathesis between AlI and SnII complexes gives an electron‐rich complex with an AlSn bond which can be described as a weak polar bond between AlII and SnI open shell fragments. Electronic structure and reactivity are discussed. The recently discovered class of potassium aluminyl complexes (R2Al−K+) enables facile access to heterobimetallic Al ...
Tristan Löwl +6 more
wiley +1 more source
Radio Supernovae and the Square Kilometer Array [PDF]
arXiv, 1999 Detailed radio observations of extragalactic supernovae are critical to obtaining valuable information about the nature and evolutionary phase of the progenitor star in the period of a few hundred to several tens-of-thousands of years before explosion.
arxiv
Science, 2007 Analysis of the polarization of light from supernovae can reveal the shape and distribution of matter ejected from exploding stars. Here we review the young field of Type Ia supernova spectropolarimetry and critically evaluate, and place in context, the recent work of Wang et al.
openaire +3 more sources
Why Schonland Failed in His Search for Runaway Electrons From Thunderstorms
Journal of Geophysical Research: Atmospheres, Volume 130, Issue 10, 28 May 2025.Abstract B.F.J. Schonland, advised and encouraged by C.T.R. Wilson, made two unsuccessful searches for runaway electrons from thunderstorms in the 1930s. These findings stand in marked contrast with research results over the last decade and ironically set this field of research back many decades.
A. Chilingarian +3 more
wiley +1 more source
Chemistry – A European Journal, Volume 31, Issue 29, May 22, 2025.Water‐soluble luminophores prepared by sulfonation of heteroleptic iridium(III) complexes enable judicious tailoring of properties for unprecedented control of electrochemiluminescence (ECL) reaction pathways in aqueous solution. This approach removes a longstanding barrier to the translation of high‐efficiency and multicolored ECL systems developed in
Kesha Sriee Manimaran +7 more
wiley +1 more source
Gamma-ray emission from young supernova remnants: Hadronic or leptonic?
EPJ Web of Conferences, 2016 The debate on the nature of the gamma-ray emission from young supernova remnants is still open. Ascribing such emission to hadronic rather than leptonic processes would provide an evidence for the acceleration of protons and nuclei, and this fact would ...
Gabici Stefano, Aharonian Felix
doaj +1 more source