There are no scheduled talks today.
Converting non-relativistic dark matter to radiation
Dr. Felix Kahlhoefer
Mon, 23 Jul 2018, 16:30
Scattering amplitudes from first principles
Markos Maniatis
Tue, 24 Jul 2018, 10:00
Multi-scale searching machine to detect the cosmic strings network
Seyed Mohammad Sadegh Movahed
Tue, 24 Jul 2018, 11:00

Decoding the Sound of the Universe

Frank Ohme , AEI
Abstract: Gravitational waves are oscillations in spacetime, caused by violent cosmic events, that travel almost unobstructedly through the Universe, carrying information about their origin that complement other types of astronomical observations. When the Advanced Laser Interferometer Gravitational-wave Observatory (LIGO) started to operate in 2015, we finally became sensitive to this "soundtrack" of the Universe. Since then, multiple binary black mergers have been observed that would otherwise be entirely invisible. In addition, August 2017 marked the beginning of the era of multi-messenger astronomy, when a neutron-star merger was "heard" through gravitational waves as well as "seen" in the electromagenetic spectrum.

In my talk, I will illustrate how minuscule oscillations in giant laser interferometers can be traced back to their astrophysical origins with the help of supercomputers. I will give an overview of current observations and show what we can learn from gravitational-wave measurements, and how this information can be combined with other data to learn about compact objects and the Universe as a whole.
Königstuhl Colloquium
9 Feb 2018, 15:00
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)

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