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Showing 1–12 of 12 results
Advanced filters: Author: Daniel Kasen Clear advanced filters

  • The afterglow of a long burst of γ-rays suggests that the events leading to these explosions can be sizeable sources of some of the Universe’s rare isotopes — and that classifications of γ-ray bursts are too simplistic.

    • Daniel Kasen
    News & Views
    Nature
    Volume: 626, P: 717-718

  • The variety of stellar deaths is less than we thought. A compilation of new and archival data shows that two previously distinct subtypes of supernova are actually two sides of the same lopsided coin.

    • Daniel Kasen
    News & Views
    Nature
    Volume: 466, P: 37-38

  • New observations suggest that certain extremely bright supernovae are not the nuclear explosions of very massive stars. Instead, they may be ordinary-mass events lit up by a potent central fountain of magnetic energy. See Letter p.346

    • Daniel Kasen
    News & Views
    Nature
    Volume: 502, P: 310-312

  • JWST observations of GRB 221009A reveal the associated supernova, confirming that the GRB resulted from the collapse of a rapidly rotating massive star. The lack of r-process emission suggests that these extreme events are not key sources of the heaviest elements.

    • Peter K. Blanchard
    • V. Ashley Villar
    • S. Karthik Yadavalli
    ResearchOpen Access
    Nature Astronomy
    Volume: 8, P: 774-785

  • This paper reports 8-µm photometric observations of the planet HD 80606b during a 30-hour interval bracketing the periastron passage of its extremely eccentric 111.4 day orbit. As the planet received its strongest irradiation its 8-µm brightness temperature increased from ∼800 K to ∼1500 K over a six-hour period. The radiative time constant at the planet's 8-µm photosphere is ∼4.5 hours, as compared to 3–5 days in Earth's stratosphere.

    • Gregory Laughlin
    • Drake Deming
    • Stefano Meschiari
    Research
    Nature
    Volume: 457, P: 562-564

  • Multi-instrument detection of a nearby type 1a supernova shows that the exploding star was probably a carbon–oxygen white dwarf star in a binary system with a main-sequence companion.

    • Peter E. Nugent
    • Mark Sullivan
    • Dovi Poznanski
    Research
    Nature
    Volume: 480, P: 344-347

  • The explosion of a type Ia supernova could be triggered either by accretion from a companion—which should be indicated by brightening caused by interaction of supernova ejecta with the companion—or by a merger with a white dwarf or other small star; here observations by the Kepler mission of three type Ia supernovae reveal no such brightening, leading to the conclusion that they were triggered by a merger.

    • Rob P. Olling
    • Richard Mushotzky
    • Alexei V. Filippenko
    Research
    Nature
    Volume: 521, P: 332-335