The inspiral of a stellar-mass compact object into a massive (∼ 104-107M⊙) black hole produces an intricate gravitational-wave signal. Due to the extreme-mass ratios involved, these systems complete ∼ 104-105orbits, most of them in the strong-field region of the massive black hole, emitting in the frequency range ∼ 10-4-1 Hz. This makes them prime sources for the space-based observatory LISA (Laser Interferometer Space Antenna). LISA observations will enable high-precision measurements of the physical characteristics of these extreme-mass-ratio inspirals (EMRIs): Redshifted masses, massive black hole spin and orbital eccentricity can be determined with fractional errors ∼ 10-4-10-6, the luminosity distance with better than ∼ 10% precision, and the sky localization to within a few square degrees. EMRIs will provide valuable information about stellar dynamics in galactic nuclei, as well as precise data about massive black hole populations, including the distribution of masses and spins. They will enable percent-level measurements of the multipolar structure of massive black holes, precisely testing the strong-gravity properties of their spacetimes. EMRIs may also provide cosmographical data regarding the expansion of the Universe if inferred source locations can be correlated with galaxy catalogs.

Berry, C., Hughes, S., Sopuerta, C., Chua, A., Heffernan, A., Holley-Bockelmann, K., et al. (2019). The unique potential of extreme mass-ratio inspirals for gravitational-wave astronomy [Working paper].

The unique potential of extreme mass-ratio inspirals for gravitational-wave astronomy

Sesana A.
2019

Abstract

The inspiral of a stellar-mass compact object into a massive (∼ 104-107M⊙) black hole produces an intricate gravitational-wave signal. Due to the extreme-mass ratios involved, these systems complete ∼ 104-105orbits, most of them in the strong-field region of the massive black hole, emitting in the frequency range ∼ 10-4-1 Hz. This makes them prime sources for the space-based observatory LISA (Laser Interferometer Space Antenna). LISA observations will enable high-precision measurements of the physical characteristics of these extreme-mass-ratio inspirals (EMRIs): Redshifted masses, massive black hole spin and orbital eccentricity can be determined with fractional errors ∼ 10-4-10-6, the luminosity distance with better than ∼ 10% precision, and the sky localization to within a few square degrees. EMRIs will provide valuable information about stellar dynamics in galactic nuclei, as well as precise data about massive black hole populations, including the distribution of masses and spins. They will enable percent-level measurements of the multipolar structure of massive black holes, precisely testing the strong-gravity properties of their spacetimes. EMRIs may also provide cosmographical data regarding the expansion of the Universe if inferred source locations can be correlated with galaxy catalogs.
Working paper
Si
Scientifica
Astro2020 Science White Paper
gravitational waves, astrophysics
English
White paper submitted to Astro2020 (2020 Decadal Survey on Astronomy and Astrophysics); Section III is arXiv-only
Berry, C., Hughes, S., Sopuerta, C., Chua, A., Heffernan, A., Holley-Bockelmann, K., et al. (2019). The unique potential of extreme mass-ratio inspirals for gravitational-wave astronomy [Working paper].
Berry, C; Hughes, S; Sopuerta, C; Chua, A; Heffernan, A; Holley-Bockelmann, K; Mihaylov, D; Miller, M; Sesana, A
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/290697
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