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Did a giant black hole eat a star?

New data now suggests that what astronomers had thought was the brightest supernova ever detect might have instead been the ripping apart of a star as it passed too close to a supermassive black hole.

In this scenario, the extreme gravitational forces of a supermassive black hole, located in the centre of the host galaxy, ripped apart a Sun-like star that wandered too close — a so-called tidal disruption event, something so far only observed about 10 times. In the process, the star was “spaghettified” and shocks in the colliding debris as well as heat generated in accretion led to a burst of light. This gave the event the appearance of a very bright supernova explosion, even though the star would not have become a supernova on its own as it did not have enough mass. The team based their new conclusions on observations from a selection of telescopes, both on the ground and in space. Among them was the NASA/ESA Hubble Space Telescope, the Very Large Telescope at ESO’s Paranal Observatory and the New Technology Telescope at ESO’s La Silla Observatory

Genesis cover

On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.

 
The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.


The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
 

"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News

3 comments

  • wayne

    Any gravitational-waves, produced by such an event?

  • Edward

    wayne,
    The event was observed in spring and summer of 2015, and that year, LIGO only operated from September 18th into 2016. I think that they missed any gravitational waves that would have been detectable.

  • wayne

    Edward-
    -Thank you. Was not sure of the timeline, or if that was even a possibility.
    The Paper associated with this event, is linked within the article, but I only skimmed it.
    (& I’m unclear on the minimum threshold the LIGO people need for G-W detection, or if a “Sun-sized” star interacting with a black-hole, produces detectable grav-waves.)

    pivoting…
    I’ll take this opportunity to shill for a new book from Dr. Roger Penrose. No new advances on his Conformal Cyclic Cosmology, but good-stuff on the state of Physics today, as he see’s it.

    “Fashion, Faith, and Fantasy in the New Physics of the Universe”
    Dr. Roger Penrose at Oxford 10-25-16
    https://youtu.be/Gsp0Gak6Lw8
    (1:01:05)

    “In this lecture, based on his new book, Roger will argue that fashion, faith, and fantasy, while sometimes productive and even essential, may be leading today’s researchers astray, most notably in three of science’s most important areas – String Theory, Quantum Mechanics, and Cosmology. Yet Roger will also describe how fashion, faith, and fantasy have, ironically, also been invaluable in shaping his own work.”

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