Unveiling the Gravitational Universe at μ-Hz Frequencies

Abstract

We propose a space-based interferometer surveying the gravitational wave (GW) sky in the milli-Hz to $\mu$-Hz frequency range. By the 2040s', the $\mu$-Hz frequency band, bracketed in between the Laser Interferometer Space Antenna (LISA) and pulsar timing arrays, will constitute the largest gap in the coverage of the astrophysically relevant GW spectrum. Yet many outstanding questions related to astrophysics and cosmology are best answered by GW observations in this band. We show that a $\mu$-Hz GW detector will be a truly overarching observatory for the scientific community at large, greatly extending the potential of LISA. Conceived to detect massive black hole binaries from their early inspiral with high signal-to-noise ratio, and low-frequency stellar binaries in the Galaxy, this instrument will be a cornerstone for multimessenger astronomy from the solar neighbourhood to the high-redshift Universe.

arXiv comment28 pages, 8 figures; White Paper submitted to ESA's Voyage 2050 call for papers on behalf of the LISA Consortium 2050 Task Force

References in corpus (20)

• Wide-Field InfrarRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA 2015 Report
• The Hot and Energetic Universe: A White Paper presenting the science theme motivating the Athena+ mission
• CMB-S4 Science Book, First Edition
• Cosmic Conundra Explained by Thermal History and Primordial Black Holes
• LISA verification binaries with updated distances from Gaia Data Release 2
• Titans of the Early Universe: The Prato Statement on the Origin of the First Supermassive Black Holes
• Predicting the LISA white dwarf binary population in the Milky Way with cosmological simulations
• Mass, inertia and gravitation
• Motion in alternative theories of gravity
• COrE (Cosmic Origins Explorer) A White Paper
• Cosmic Explorer: The U.S. Contribution to Gravitational-Wave Astronomy beyond LIGO
• Origin and Implications of high eccentricities in massive black hole binaries at sub-pc scales
• Gravitational Memory, BMS Supertranslations and Soft Theorems
• Gravitational wave astronomy with the SKA
• Prospects for Memory Detection with Low-Frequency Gravitational Wave Detectors
• Space Based Gravitational Wave Astronomy Beyond LISA
• Envisioning the next decade of Galactic Center science: a laboratory for the study of the physics and astrophysics of supermassive black holes
• Imprints of Early Universe on Gravitational Waves from First-Order Phase Transition in QCD
• Detecting the Birth of Supermassive Black Holes Formed from Heavy Seeds
• Electromagnetic Window into the Dawn of Black Holes

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