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Showing 1–18 of 18 results
Advanced filters: Author: Alexander Heger Clear advanced filters

  • The chemical composition of the Galactic halo star J1010+2358 shows extremely low sodium and cobalt abundances, different from most other halo stars, indicative of a very metal-poor star being seeded with elements from a pair-instability supernova.

    • Qian-Fan Xing
    • Gang Zhao
    • Jing-Kun Zhao
    ResearchOpen Access
    Nature
    Volume: 618, P: 712-715

  • One hypothesis for solar system formation is gas compression by a nearby supernova, whose traces should be found in isotopic anomalies. Here the authors show that this mechanism is viable only if the triggering event was a low-mass supernova, looking at short-lived 10Be and lack of anomalies in stable isotopes.

    • Projjwal Banerjee
    • Yong-Zhong Qian
    • W C Haxton
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-6

  • The neutron star birth-mass function, based on 90 mass measurements, shows a unimodal turn-on power-law shape peaking at 1.27 solar masses. This model links supernova progenitors and binary evolution to observed mass constraints.

    • Zhi-Qiang You
    • Xingjiang Zhu
    • Zong-Hong Zhu
    Research
    Nature Astronomy
    Volume: 9, P: 552-563

  • When massive stars die as supernovae, these explosions can be seen out to the 'edge of the Universe'. But the stars' nature is often unclear. New observations provide insight into the life of one such star before it exploded. See Letter p.65

    • Alexander Heger
    News & Views
    Nature
    Volume: 494, P: 46-47

  • NEDD4-binding protein 1 (N4BP1) is identified as a suppressor of cytokine production that is inactivated by caspase-8, which provides insight into the mechanisms underlying the immunodeficiency caused by mutations in FADD and caspase-8.

    • Alexander D. Gitlin
    • Klaus Heger
    • Vishva M. Dixit
    Research
    Nature
    Volume: 587, P: 275-280

  • Dewald et al. combine a non-invasive sampling approach (Lolli-Test) with an RT qPCR-pool testing strategy to screen for SARS-CoV-2 infections in children and use the method for surveillance and infection control in > 4000 school and daycare settings.

    • Felix Dewald
    • Isabelle Suárez
    • Florian Klein
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-11

  • This paper reports that the brightest supernovae arise from collisions between shells of matter ejected by massive stars. An electron-positron 'pair instability' leads to explosive burning that ejects many solar masses of material. When the next explosion occurs, several solar masses of material are again ejected, which collide with the earlier ejecta, radiating 1050 erg of light.

    • S. E. Woosley
    • S. Blinnikov
    • Alexander Heger
    Research
    Nature
    Volume: 450, P: 390-392

  • Observation of a new resonance in the 19-fluorine to 20-neon thermonuclear reaction at the China JinPing Underground Laboratory (over 2 km below ground) may provide clues to observed discrepancies in calcium production in the evolution of the first stars.

    • Liyong Zhang
    • Jianjun He
    • Weiping Liu
    Research
    Nature
    Volume: 610, P: 656-660

  • The genome of the grey short-tailed opossum Monodelphis domestica has been sequenced and analyzed, giving a first peek at a marsupial's genetic code. Of particular interest are the genetics of the immune system, which has been studied as a model for humans, and of the X chromosome for historical reasons.

    • Tarjei S. Mikkelsen
    • Matthew J. Wakefield
    • Kerstin Lindblad-Toh
    Research
    Nature
    Volume: 447, P: 167-177

  • An international consortium reports the genomic sequence for ten Drosophila species, and compares them to two other previously published Drosophila species. These data are invaluable for drawing evolutionary conclusions across an entire phylogeny of species at once.

    • Andrew G. Clark
    • Michael B. Eisen
    • Iain MacCallum
    Research
    Nature
    Volume: 450, P: 203-218

  • Platypuses are monotremes and combine aspects of both reptilian and mammalian behaviour. An international consortium reports the genome sequence and analysis of Ornithorhynchus anatinus and as expected, parts of the genome look more like mammals, whereas other parts more like reptiles or even chickens.

    • Wesley C. Warren
    • LaDeana W. Hillier
    • Richard K. Wilson
    ResearchOpen Access
    Nature
    Volume: 453, P: 175-183

  • In an inter-laboratory study, the authors compare the accuracy and performance of three optical density calibration protocols (colloidal silica, serial dilution of silica microspheres, and colony-forming unit (CFU) assay). They demonstrate that serial dilution of silica microspheres is the best of these tested protocols, allowing precise and robust calibration that is easily assessed for quality control and can also evaluate the effective linear range of an instrument.

    • Jacob Beal
    • Natalie G. Farny
    • Jiajie Zhou
    ResearchOpen Access
    Communications Biology
    Volume: 3, P: 1-29