Coming april 2018

Black hole blues, and other songs from outer space

Hosted by Professor Alan Weinstein

Black Hole Blues

Professor Alan Weinstein

My research focus in recent years has been in the search for gravitational waves (GWs) using the Advanced LIGO detectors, within the LIGO Scientific Collaboration.

GWs are produced by the most extreme environments and events in the universe, where gravitational fields are strongest and most repidly changing: black holes and the earliest moments of the Big Bang. GWs from neutron stars probe all the fundamental forces of nature, at energies and densities unobtainable in the laboratory.

I lead the gravitational wave astrophysical data analysis group at LIGO Laboratory, Caltech. Our group works in all aspects of the subject:

  • characterizing the performance and improving the quality of the data from the Advanced LIGO detectors;
  • studying the fundamental properties of GWs from astrophysical sources, and searching for properties beyond those predicted by General Relativity;
  • searching for GW signals from the inspiral and merger of compact binary systems (neutron stars and/or black holes) in distant galaxies;
  • studying the properties and populations of these systems using Bayesian inference; 
  • rapidly searching for electromagnetic (optical, x-ray, gamma ray, radio) counterparts to events detected in GWs to better understand the sources ("multi-messenger astronomy");
  • searching for GW burst signals from core-collapse supernovas in our galaxy and the Local Group, and studying the properties of those events;
  • searching for GW signals from spinning neutron stars in our galactic neighborhood, and using them to test General Relativity;
  • searching for GW signals from the Big Bang and from many weakly emitting astrophysical sources.

From the author of How the Universe Got Its Spots and A Madman Dreams of Turing Machines, the epic story of the scientific campaign to record the soundtrack of our universe.
Black holes are dark. That is their essence. When black holes collide, they will do so unilluminated. Yet the black hole collision is an event more powerful than any since the origin of the universe. The profusion of energy will emanate as waves in the shape of spacetime: gravitational waves. No telescope will ever record the event; instead, the only evidence would be the sound of spacetime ringing. In 1916, Einstein predicted the existence of gravitational waves, his top priority after he proposed his theory of curved spacetime. One century later, we are recording the first sounds from space, the soundtrack to accompany astronomy’s silent movie.

In Black Hole Blues and Other Songs from Outer Space, Janna Levin recounts the fascinating story of the obsessions, the aspirations, and the trials of the scientists who embarked on an arduous, fifty-year endeavor to capture these elusive waves. An experimental ambition that began as an amusing thought experiment, a mad idea, became the object of fixation for the original architects—Rai Weiss, Kip Thorne, and Ron Drever. Striving to make the ambition a reality, the original three gradually accumulated an international team of hundreds. As this book was written, two massive instruments of remarkably delicate sensitivity were brought to advanced capability. As the book draws to a close, five decades after the experimental ambition began, the team races to intercept a wisp of a sound with two colossal machines, hoping to succeed in time for the centenary of Einstein’s most radical idea. Janna Levin’s absorbing account of the surprises, disappointments, achievements, and risks in this unfolding story offers a portrait of modern science that is unlike anything we’ve seen before.