Results 91 to 100 of about 9,448 (220)
Positron Annihilation Spectroscopy of Young Supernova Remnants
Odessa Astronomical Publications, 2018 This paper discusses radiative and thermodynamic properties of cold rarefied aggregates of non-uniformly distributed gas and dust through which high fluxes of positrons with energies of 0.011-3.6 MeV pass.
D. N. Doikov
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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
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Deep Optical Emission-line Images of Nine Known and Three New Galactic Supernova Remnants
The Astrophysical Journal Supplement SeriesDeep optical emission-line images are presented for nine known plus three new Galactic supernova remnants (SNRs), all but one having at least one angular dimension >1°.
Robert A. Fesen +16 more
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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
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Radioactivity in Supernova Remnants.
The Astrophysical Journal, 1965 We calculate implications of the idea developed by Burbidge et al. that the nearly exponential decrease after the (irst 100 days of the light-curves of Type i supernovae is due to nuclear energy released by the spontaneous fission of Cf354. Uncertainty of the correctness of the Cf-hypothesis qualifies any interpretation of (1) supernovae light-curves, (
Clayton, Donald D, Craddock, W L
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The Astrophysical JournalSupernova remnants (SNRs) exhibit varying degrees of anisotropy, which have been extensively modeled using numerical methods. We implement a technique to measure anisotropies in SNRs by calculating power spectra from their high-resolution images. To test
Soham Mandal +3 more
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Molecular Ecology, Volume 34, Issue 15, August 2025.Abstract Natural variation can provide important insights into the genetic and environmental factors that shape social behaviour and its evolution. The sweat bee, Lasioglossum baleicum, is a socially flexible bee capable of producing both solitary and eusocial nests.
Kennedy S. Omufwoko +5 more
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The Astrophysical JournalThe maximum energy of electrons in supernova remnant (SNR) shocks is typically limited by radiative losses, where the synchrotron cooling time equals the acceleration time.
Vincenzo Sapienza +7 more
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Supernova 1987A: The Birth of a Supernova Remnant [PDF]
International Astronomical Union Colloquium, 2005 SummaryI describe and interpret observations of the rapidly developing impact of the debris of SN1987A with its circumstellar ring.
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