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  • Astrolunch: Suhail Dhawan (Stockholm)

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    Tue, 07/07/2020 - 12:30 to 13:30

    Title: The Hubble constant with explosive transients

    Abstract: The recent discrepancy between local measurements of the Hubble constant and the inferred, global value from the cosmic microwave background could indicate new physics, e.g. additional neutrino species, phantom dark energy. However, the explanation could be more mundane, e.g. unknown systematic uncertainties. Hence, it is critical to measure H₀ from completely independent cosmological probes to resolve the cause of the tension.

  • Astrolunch: Doron Kushnir (Weizmann)

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    Sun, 28/06/2020 - 12:30 to 13:30

    Title: An accurate and efficient numerical calculation of detonation waves in supernovae simulations reveals that sub-Chandra models are in tension with observations

  • Astrolunch: Sivan Ginzburg (Berkeley)

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    Tue, 26/05/2020 - 16:00 to 17:00

    NOTE THE UNUSUAL TIMING!!
    Title: Black Widow Evolution
    Abstract: Black widows are millisecond pulsars with low-mass companions (~2% the mass of the sun) on short orbits of several hours. When the first black widow was discovered in 1988, it was proposed that its companion is the remnant of a main sequence star that had been evaporated by the pulsar’s high energy radiation. I will present new observations from the last decade that challenge this picture, and discuss how the growing population of black widows can be explained consistently.