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Showing 1–15 of 15 results
Advanced filters: Author: Ashish Mahabal Clear advanced filters

  • An extreme flare has been seen from a supermassive black hole at redshift z = 2.6. First detected in 2018, it is 30 times brighter than similar events. The most likely cause is the shredding of a star of 30 solar masses or more.

    • Matthew J. Graham
    • Barry McKernan
    • Ashish Mahabal
    Research
    Nature Astronomy
    Volume: 10, P: 154-164

  • Observations of optical flares from AT2022tsd (the ‘Tasmanian Devil’) show that they have durations on the timescale of minutes, occur over a period of months, are highly energetic, are probably nonthermal and have supernova luminosities.

    • Anna Y. Q. Ho
    • Daniel A. Perley
    • WeiKang Zheng
    Research
    Nature
    Volume: 623, P: 927-931

  • A series of early-time, multiwavelength observations of an optical transient, AT2022cmc, indicate that it is a relativistic jet from a tidal disruption event originating from a supermassive black hole.

    • Igor Andreoni
    • Michael W. Coughlin
    • Jielai Zhang
    Research
    Nature
    Volume: 612, P: 430-434

  • The tidal disruption event AT2019dsg is probably associated with a high-energy neutrino, suggesting that such events can contribute to the cosmic neutrino flux. The electromagnetic emission is explained in terms of a central engine, a photosphere and an extended synchrotron-emitting outflow.

    • Robert Stein
    • Sjoert van Velzen
    • Yuhan Yao
    Research
    Nature Astronomy
    Volume: 5, P: 510-518

  • The spectral properties of a short gamma-ray burst indicate that, contrary to expectations, it arose from the collapse of a massive star rather than from a compact binary merger. This discovery also confirms that most collapsars do not produce ultra-relativistic jets.

    • Tomás Ahumada
    • Leo P. Singer
    • Azamat F. Valeev
    Research
    Nature Astronomy
    Volume: 5, P: 917-927

  • A search of a data set of light curves for 247,000 known, spectroscopically confirmed quasars with a temporal baseline of about 9 years reveals a strong, smooth periodic signal in the optical variability of quasar PG 1302−102 with a mean observed period of 1,884 ± 88 days, indicating a possible supermassive black-hole binary.

    • Matthew J. Graham
    • S. G. Djorgovski
    • Eric Christensen
    Research
    Nature
    Volume: 518, P: 74-76

  • Deep space exploration missions will require new technologies that can support astronaut health systems, as well as biological monitoring and research systems that can function independently from Earth-based mission control centres. A NASA workshop explored how artificial intelligence advances could help address these challenges and, in this second of two Review articles based on the findings from the workshop, the intersection between artificial intelligence and space biology is discussed.

    • Lauren M. Sanders
    • Ryan T. Scott
    • Sylvain V. Costes
    Reviews
    Nature Machine Intelligence
    Volume: 5, P: 208-219

  • Deep-space exploration missions require new technologies that can support astronaut health systems as well as biological monitoring and research systems that can function independently from Earth-based mission control centres. A NASA workshop explored how artificial intelligence advances could help address these challenges and, in this first of two Review articles based on the findings from the workshop, a vision for autonomous biomonitoring and precision space health is discussed.

    • Ryan T. Scott
    • Lauren M. Sanders
    • Sylvain V. Costes
    Reviews
    Nature Machine Intelligence
    Volume: 5, P: 196-207