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Mixed Signals in Pulsar Timing Array...

Drachler, Brendan.

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Mixed Signals in Pulsar Timing Arrays - Discerning Red Spin Noise from Gravitational Waves.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Mixed Signals in Pulsar Timing Arrays - Discerning Red Spin Noise from Gravitational Waves./
作者:	Drachler, Brendan.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	100 p.
附註:	Source: Masters Abstracts International, Volume: 82-05.
Contained By:	Masters Abstracts International82-05.
標題:	Astrophysics. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28094694
ISBN:	9798678181695

Mixed Signals in Pulsar Timing Arrays - Discerning Red Spin Noise from Gravitational Waves.
Drachler, Brendan.

Mixed Signals in Pulsar Timing Arrays - Discerning Red Spin Noise from Gravitational Waves. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 100 p.

Source: Masters Abstracts International, Volume: 82-05.

Thesis (M.S.)--Rochester Institute of Technology, 2020.

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

The detection of gravitational waves (GWs) with ground-based interferometers like the Laser Interferometer Gravitational Wave Observatory (LIGO) revolutionized our view of the Universe. Pulsar timing arrays (PTAs) like observed by the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) will provide the community with an avenue for exploring the GW spectrum beyond what is capable with ground-based interferometers. Unlike LIGO, pulsars do not exist in an ideal environment where clever engineering can mitigate sources of noise. With that being said, many of the dominant sources of noise in PTAs have been well modeled within NANOGrav. The impact of red spin noise (RSN), which may result from rotational instabilities in the neutron star itself, is particularly problematic because its effect on a PTA's timing residuals could resemble the effects of a gravitational wave background (GWB).In this work, we simulate a PTA where each pulsar suffers from varying amplitudes of RSN and also has an underlying GWB. We recover the parameters describing the RSN to better characterize how a GWB of varying amplitudes biases our recovery efforts. We find regions of parameter space where the GWB and the RSN heavily bias each other. In these regions, RSN could masquerade as a GWB, or vice versa. However, we also find regions of parameter space that do not result in a biased recovery, even in the case of a large GWB amplitude. Finally, we define the problematic regions of parameter space and draw conclusions about recovery efforts in today's operational PTAs.

ISBN: 9798678181695Subjects--Topical Terms:

535904
Astrophysics.
Subjects--Index Terms:

Gravitational Waves

Mixed Signals in Pulsar Timing Arrays - Discerning Red Spin Noise from Gravitational Waves.
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300 $a 100 p.
500 $a Source: Masters Abstracts International, Volume: 82-05.
500 $a Advisor: Lam, Michael.
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506 $a This item must not be sold to any third party vendors.
520 $a The detection of gravitational waves (GWs) with ground-based interferometers like the Laser Interferometer Gravitational Wave Observatory (LIGO) revolutionized our view of the Universe. Pulsar timing arrays (PTAs) like observed by the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) will provide the community with an avenue for exploring the GW spectrum beyond what is capable with ground-based interferometers. Unlike LIGO, pulsars do not exist in an ideal environment where clever engineering can mitigate sources of noise. With that being said, many of the dominant sources of noise in PTAs have been well modeled within NANOGrav. The impact of red spin noise (RSN), which may result from rotational instabilities in the neutron star itself, is particularly problematic because its effect on a PTA's timing residuals could resemble the effects of a gravitational wave background (GWB).In this work, we simulate a PTA where each pulsar suffers from varying amplitudes of RSN and also has an underlying GWB. We recover the parameters describing the RSN to better characterize how a GWB of varying amplitudes biases our recovery efforts. We find regions of parameter space where the GWB and the RSN heavily bias each other. In these regions, RSN could masquerade as a GWB, or vice versa. However, we also find regions of parameter space that do not result in a biased recovery, even in the case of a large GWB amplitude. Finally, we define the problematic regions of parameter space and draw conclusions about recovery efforts in today's operational PTAs.
590 $a School code: 0465.
650 4 $a Astrophysics. $3 535904
650 4 $a Nuclear physics. $3 517741
650 4 $a Astronomy. $3 517668
653 $a Gravitational Waves
653 $a NANOGrav
653 $a Pulsar
653 $a Pulsar Timing Array
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793 $a English
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