Houston Astronomical Society Presentation by Noah Pearson on 28 Jan 2022 – comments and suggestions
Luis,
This was a good presentation. On Vimeo, watching reruns, no way to say “Thank you to the presenter” or to ask questions.
We live in a world where any author’s work might be available globally for all time forward. And, it they are living, the small matter of “time” it taken care of by email and comment forms.
I wanted to tell him to extend his sensitivity chart out to gamma ray frequencies. There is extensive work going on to calculate and try to measure gravitational signals across all frequencies accessible to electromagnetism.
He did not mention the atom interferometer versions of LIGO and LISA. Shorter wavelengths mean much smaller devices. There are atom interferometer chips and gravitational detectors. And many groups working on low cost, desktop and portable devices.
Tell him thank you. If he wants to write me, I am happy to chat. I met some of the founders of gravitational wave detection when I was at UMD College Park in the later 1970’s. They intended it to be used for communication, imaging and practical applications. He is young and will survive, but might find working on large government funded projects is hard. And generally not that lucrative if he is thinking of starting a family one day.
Photoproduction of high-frequency gravitational radiation by galactic and extragalactic sources
The consensus seems to be that these higher frequencies can tell a lot about the contents and properties of intergalactic space. There are a number of lab experiments going on. It needs to be organized and standardized so that people can see how it all fits together.
“gravitational Compton scattering”
“gravitational polarizability”
“graviton photoproduction”
“Graviton-photon scattering”
“gravitational” “forward scattering”
Gravitons to Photons–Attenuation of Gravitational Waves
Exact Gravitational Shockwaves and Planckian Scattering on Branes
I suggest concentrating on energy spectrum and keep groups working on the same energy and scale together. Every group has their favorite mathematical notations, algorithms, programming languages, data sources. But when you combine methods from all the groups working on a given scale and energy range, it is easier and faster to look for connections and applications.
For instance any group using multipole expansions for nuclear and atomic reactions in the 10 eV to 10 MeV bond energy range will be able to estimate the precise spectrum, direction and modulation of the signals – and have the sensors and tools to verify.
Good luck and thanks for a nice presentation.
Richard Collins
