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NSF Fellow/NYU Prof. Gabriel Perez-Giz presents "Black Holes for Dummies"

A free public lecture by NYC Astrophysicist Gabriel Perez-Giz. What are black holes? What makes them so amazing?

In 2010, Professor Perez-Gil won a National Science Foundation Astronomy and Astrophysics Postdoctoral Fellowship to carry out a program of research and education at the Massachusetts Institute of Technology (MIT) Kavli Institute for Astrophysics and Space Research (MKI) on the study of orbital motions of Black Holes.

In the abstract for the award, the NSF stated, "The dynamics of black hole (BH) binaries is especially dynamically rich since the nonlinear footprint of general relativity (GR) will be most visible in the regime of large masses and small separations achievable by such massive compact objects. Unlike in classical celestial mechanics, the motion in such ultra-relativistic binaries is complicated by the loss of energy and angular momentum to gravitational waves (GWs), which causes the orbiting bodies to spiral inward and eventually merge. Unfortunately, systematic numerical study of inspiraling black hole binaries is not possible in the status quo with either numerical relativity (too computationally expensive) or Post-Newtonian approximations (too inaccurate).

....However, when the ratio of the masses is extremely small, as when a stellar-mass BH orbits a supermassive galactic BH, the inspiral calculation becomes tractable....

....Dr. Perez-Giz will adapt this code to achieve a many-fold improvement in computational efficiency via a technique exploiting special properties of periodic geodesics around Kerr black holes...."

Please join us on Friday night at the Kaufman Auditorium at the American Museum of Natural History as NYU Physics Professor Gabriel Perez-Gil explains the current state of the art of our understanding of Black Holes - - in everyday language.

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  • Aidan M.

    please sir, may i have another...

    1 · February 3, 2013

  • guitarhunter

    I always say that if it's not over your head it's not worthwhile

    3 · January 30, 2013

    • guitarhunter

      Ich bin ein dummy

      January 31, 2013

    • leo g.

      Touche Guitar Hunyer, aber offensichtlich sind Sie kein Dummkopf. Als für mich, die Schuld ich Google übersetzen ioy (goggle translate) Fehler hier.

      February 3, 2013

  • A former member
    A former member

    Anyone believe the black hole universe creation theory holds any merit? Don't laugh because it is more of a sci fi theory. Basically , each black hole creates a new universe on the other side of it. In essence we live in a multiverse with infinite universes. This expands on the brain theory, exception being the brain theory is finite. This theory is technically infinite. Don't get this confused with the expansion collapse and expand again theory.

    Well what do you think? Obviously there is no way to prove what created the big bang and the universe or multiverse. Just curios what others think?

    Ps- I am a new member. Dominick is the name. Hope to meet all of you soon enough.

    1 · January 31, 2013

    • leo g.

      Hi Dominick,

      Welcome to this Meetup and thank you for using this space to start a conversation.

      Despite my having studied Astrophysics at UCLA (University of the Corner of Lenox Avenue) I must admit I am confused. What is the other side of a black hole? Commenting on your other points, I personally believe that the visible Universe that we think started ~13.7 billion years ago is part of a larger area, infinite and endless in size. Sounds like a Multiverse.

      As for Brane theory, I think that if there are these membrane like Branes, the analogy that they are, for now, as hard for us humans as to understand as it would be for deep sea creatures to understand that Birds fly in the sky. Similarly, how can we understand what might be and probably is crawling around on the surface of other dimensions or other membranes/branes? I look forward to meeting you.


      January 31, 2013

    • A former member
      A former member

      Hey Leo!
      Pleased to get a response from you man. Here is a link to the black hole universe theory:

      In essence, whatever comes out the other side of a black hole is actually an entirely new universe.

      1 · February 2, 2013

  • A former member
    A former member

    Gab was a great presenter, engaged the audience and kept us engaging our our brains too.. Loved it. Thanks for hosting AAA!

    1 · February 2, 2013

  • Sam

    Great presentation and great participation.

    1 · February 1, 2013

  • guitarhunter

    excellent, a huge, pleasant suprise and well done.

    1 · February 1, 2013

  • justin p.

    Was very good. I really wanted to dive into qm questions about the Blackhole information paradox and recent hypotheses on delocalization even after Hawking radiation (Photon emission) but for a relativistic talk it was fantastic

    1 · February 1, 2013

  • Barry Belgorod, M.

    An analysis of black holes that was completely different than anything I ever heard. A real revelation!

    1 · February 1, 2013

  • Geert D.

    Meet and network tonight w/ Leo, Charlie and many others at the meetup.

    We built an easy-to browse/search page for/with all attendees:

    Happy networking! 


    February 1, 2013

  • Marilyn

    Not going to beat around the bush: Is this presentation really for dummies because it took me a while to decipher the description above.

    1 · January 30, 2013

    • leo g.

      Marilyn, on second thought, I think I missed an issue here.

      If people like you and me can't decipher this lecture, would that prove Leonard Susskind wrong in his bet with Stephen Hawking, where Susskind said that said that "information" cannot get lost in a black hole?

      For more on the Hawking v. Susskind bet, regarding which Hawking conceded defeat in 2004, see this GREAT (must reading for astrophysics buffs?) and clear interview of Professor Susskind:


      .com / 790

      Reading this brief piece might make provide a good foundation for Professor Perez-Giz's presentation on Black Holes tomorrow night.

      January 31, 2013

    • leo g.

      for some reason the link gets truncated when I type it without spaces...but the link actually has no spaces.

      January 31, 2013

  • guitarhunter

    What happened? Is there an alternate universe with Sloan/Galaxies being presented?

    Which universe/presentation will be serving hors d'oeuvres?

    1 · January 30, 2013

    • leo g.

      We had to change the schedule at the last minute. I am sure Professor Perez-Giz presentation on Black Holes will be fascinating and up to the minute. I believe we will try to reschedule the presentation on the Sloan Guide to the Galaxies during the Fall 2013/Spring 2014 lecture season.

      To answer your other question, I imagine safe and tasty, vegan subatomic hors d'oerves are available everywhere throughout the Higgs Field and the Multiverses - - present and future, provided you have the technology to sample them. We're probably unknowingly inhaling trillions of them with every breath.

      I have a question for you Guitar Hunter: is music math made beautiful? Hope to meet to see you Friday!

      January 30, 2013

  • Vishal G.

    Do we need an entry ticket, or is an RSVP on this page sufficient for entry?

    January 19, 2013

    • Vishal G.

      I thought David Hogg was giving a talk ???

      January 29, 2013

    • leo g.

      Vishal, he was. We had a last minute change, but in Professor Perez-Giz, I think we've found a phenomenal replacement.

      January 30, 2013

  • Michael

    Looks like it should be a great time

    1 · January 28, 2013

  • Rochelle M.

    Looking forward to it!

    1 · January 10, 2013

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