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- W4226503106 abstract "A major challenge for gravitational-wave (GW) detection in the $mu$Hz band is engineering a test mass (TM) with sufficiently low acceleration noise. We propose a GW detection concept using asteroids located in the inner Solar System as TMs. Our main purpose is to evaluate the acceleration noise of asteroids in the $mu$Hz band. We show that a wide variety of environmental perturbations are small enough to enable an appropriate class of $sim 10$ km-diameter asteroids to be employed as TMs. This would allow a sensitive GW detector in the band $text{(few)} times 10^{-7} text{Hz} lesssim f_{text{GW}} lesssim text{(few)} times 10^{-5} text{Hz}$, reaching strain $h_c sim 10^{-19}$ around $f_{text{GW}} sim 10 mu$Hz, sufficient to detect a wide variety of sources. To exploit these asteroid TMs, human-engineered base stations could be deployed on multiple asteroids, each equipped with an electromagnetic (EM) transmitter/receiver to permit measurement of variations in the distance between them. We discuss a potential conceptual design with two base stations, each with a space-qualified optical atomic clock measuring the round-trip EM pulse travel time via laser ranging. Tradespace exists to optimize multiple aspects of this mission: for example, using a radio-ranging or interferometric link system instead of laser ranging. This motivates future dedicated technical design study. This mission concept holds exceptional promise for accessing this GW frequency band." @default.
- W4226503106 created "2022-05-05" @default.
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- W4226503106 date "2021-12-21" @default.
- W4226503106 modified "2023-09-28" @default.
- W4226503106 title "Asteroids for microhertz gravitational-wave detection" @default.
- W4226503106 hasPublicationYear "2021" @default.
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