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Hearing and Seeing the Universe: Res...

Doctor, Zoheyr.

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Hearing and Seeing the Universe: Results from Gravitational-wave and Optical Studies of Merging Neutron Stars and Black Holes.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Hearing and Seeing the Universe: Results from Gravitational-wave and Optical Studies of Merging Neutron Stars and Black Holes./
作者:	Doctor, Zoheyr.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	162 p.
附註:	Source: Dissertations Abstracts International, Volume: 81-05, Section: B.
Contained By:	Dissertations Abstracts International81-05B.
標題:	Astrophysics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=22616773
ISBN:	9781088394458

Hearing and Seeing the Universe: Results from Gravitational-wave and Optical Studies of Merging Neutron Stars and Black Holes.
Doctor, Zoheyr.

Hearing and Seeing the Universe: Results from Gravitational-wave and Optical Studies of Merging Neutron Stars and Black Holes. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 162 p.

Source: Dissertations Abstracts International, Volume: 81-05, Section: B.

Thesis (Ph.D.)--The University of Chicago, 2019.

This item must not be sold to any third party vendors.

Since the first direct detection of a gravitational wave by the Laser Interferometer Gravitational-Wave Observatory in 2015, gravitational waves have become an indispensable tool for studying extreme astrophysical phenomena. To date, eleven of these "ripples in spacetime" have been detected -- ten from merging pairs of black holes and one from two colliding neutron stars. In principle, electromagnetic and neutrino signals can be combined with gravitational-wave data to form a more complete picture of these compact object mergers. In this thesis, we present four studies of gravitational-wave and optical signatures from black-hole and neutron-star mergers. First we describe a technique for emulating expensive simulations of gravitational waveforms using Gaussian process regression, a method for non-parametrically interpolating functions and their uncertainties. The second topic we address is that of the mass ejected from the collision of the two neutron stars that produced the LIGO-Virgo gravitational wave GW170817. We find that the mass dynamically ejected from the merger should enrich its surroundings with heavy r-process elements, suggesting that neutron-star mergers could have played a significant role in the production of heavy elements we see in our solar system. Next we present the analysis and upper limits from the Dark Energy Survey of an independent optical search for kilonovae, the bright optical transients associated with neutron-star mergers. Finally, we describe Dark Energy Camera optical follow-up of black-hole merger GW170814 and the results of that search.

ISBN: 9781088394458Subjects--Topical Terms:

535904
Astrophysics.
Subjects--Index Terms:

Black holes

Hearing and Seeing the Universe: Results from Gravitational-wave and Optical Studies of Merging Neutron Stars and Black Holes.
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506 $a This item must not be sold to any third party vendors.
520 $a Since the first direct detection of a gravitational wave by the Laser Interferometer Gravitational-Wave Observatory in 2015, gravitational waves have become an indispensable tool for studying extreme astrophysical phenomena. To date, eleven of these "ripples in spacetime" have been detected -- ten from merging pairs of black holes and one from two colliding neutron stars. In principle, electromagnetic and neutrino signals can be combined with gravitational-wave data to form a more complete picture of these compact object mergers. In this thesis, we present four studies of gravitational-wave and optical signatures from black-hole and neutron-star mergers. First we describe a technique for emulating expensive simulations of gravitational waveforms using Gaussian process regression, a method for non-parametrically interpolating functions and their uncertainties. The second topic we address is that of the mass ejected from the collision of the two neutron stars that produced the LIGO-Virgo gravitational wave GW170817. We find that the mass dynamically ejected from the merger should enrich its surroundings with heavy r-process elements, suggesting that neutron-star mergers could have played a significant role in the production of heavy elements we see in our solar system. Next we present the analysis and upper limits from the Dark Energy Survey of an independent optical search for kilonovae, the bright optical transients associated with neutron-star mergers. Finally, we describe Dark Energy Camera optical follow-up of black-hole merger GW170814 and the results of that search.
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