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Physical Sciences and Mathematics Commons™
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Articles 1 - 6 of 6
Full-Text Articles in Physical Sciences and Mathematics
Whispers From The Cosmos: The Dawn Of Gravitational Wave Astronomy, Shane L. Larson
Whispers From The Cosmos: The Dawn Of Gravitational Wave Astronomy, Shane L. Larson
Public Talks
No abstract provided.
Constraining The Black Hole Mass Spectrum With Gravitational Wave Observations – I. The Error Kernel, Danny C. Jacobs, Joseph E. Plowman, Ronald W. Hellings, Sachiko Tsuruta, Shane L. Larson
Constraining The Black Hole Mass Spectrum With Gravitational Wave Observations – I. The Error Kernel, Danny C. Jacobs, Joseph E. Plowman, Ronald W. Hellings, Sachiko Tsuruta, Shane L. Larson
All Physics Faculty Publications
Many scenarios have been proposed for the origin of the supermassive black holes (SMBHs) that are found in the centres of most galaxies. Many of these formation scenarios predict a high-redshift population of intermediate-mass black holes (IMBHs), with masses M• in the range 102≲M•≲ 105 M⊙. A powerful way to observe these IMBHs is via gravitational waves the black holes emit as they merge. The statistics of the observed black hole population should, in principle, allow us to discriminate between competing astrophysical scenarios for the origin and formation of SMBHs. However, …
Hearing Voices In The Dark: Probing The Gravitational Wave Cosmos With Lisa, Shane L. Larson
Hearing Voices In The Dark: Probing The Gravitational Wave Cosmos With Lisa, Shane L. Larson
Colloquia and Seminars
No abstract provided.
Science Icebreaker Activities: An Example From Gravitational Wave Astronomy, Michelle B. Larson, Louis J. Rubbo, Kristina D. Zaleski, Shane L. Larson
Science Icebreaker Activities: An Example From Gravitational Wave Astronomy, Michelle B. Larson, Louis J. Rubbo, Kristina D. Zaleski, Shane L. Larson
All Physics Faculty Publications
At the beginning of a class, workshop, or meeting, an icebreaker activity is often used to help loosen up the group and get everyone talking. When used as a precursor to group learning, the icebreaker fosters communication so later activities function more smoothly. Science-based icebreaker activities serve the purpose of a traditional icebreaker, while also introducing science content to the audience. The content of the icebreaker may or may not be related to the topic of the upcoming class or meeting. Either way, the activity provides a way to get people talking while the participants simultaneously learn something new and …
Lisa Data Analysis: Source Identification And Subtraction, Neil J. Cornish, Shane L. Larson
Lisa Data Analysis: Source Identification And Subtraction, Neil J. Cornish, Shane L. Larson
All Physics Faculty Publications
The Laser Interferometer Space Antenna will operate as an AM-FM receiver for gravitational waves. For binary systems, the source location, orientation and orbital phase are encoded in the amplitude and frequency modulation. The same modulations spread a monochromatic signal over a range of frequencies, making it difficult to identify individual sources. We present a method for detecting and subtracting individual binary signals from a data stream with many overlapping signals.
Unequal Arm Space-Borne Gravitational Wave Detectors, Shane L. Larson, Ronald W. Hellings, William A. Hiscock
Unequal Arm Space-Borne Gravitational Wave Detectors, Shane L. Larson, Ronald W. Hellings, William A. Hiscock
All Physics Faculty Publications
Unlike ground-based interferometric gravitational wave detectors, large space-based systems will not be rigid structures. When the end stations of the laser interferometer are freely flying spacecraft, the armlengths will change due to variations in the spacecraft positions along their orbital trajectories, so the precise equality of the arms that is required in a laboratory interferometer to cancel laser phase noise is not possible. However, using a method discovered by Tinto and Armstrong, a signal can be constructed in which laser phase noise exactly cancels out, even in an unequal arm interferometer. We examine the case where the ratio of the …