Will Gravitational Waves Discover the First Extra-Galactic Planetary System?
arXiv:2007.07010 · doi:10.1142/S0218271820430075
Abstract
Gravitational waves have opened a new observational window through which some of the most exotic objects in the Universe, as well as some of the secrets of gravitation itself, can now be revealed. Among all these new discoveries, we recently demonstrated [N. Tamanini & C. Danielski, Nat. Astron., 3(9), 858 (2019)] that space-based gravitational wave observations will have the potential to detect a new population of massive circumbinary exoplanets everywhere inside our Galaxy. In this essay we argue that these circumbinary planetary systems can also be detected outside the Milky Way, in particular within its satellite galaxies. Space-based gravitational wave observations might thus constitute the mean to detect the first extra-galactic planetary system, a target beyond the reach of standard electromagnetic searches.
arXiv commentEssay received an honorable mention in the Gravity Research Foundation 2020 Awards for Essays on Gravitation; Accepted for publication in Int. J. Mod. Phys. D; 3 pages, 1 figure
References in corpus (19)
- Observation of Gravitational Waves from a Binary Black Hole Merger
- GWTC-1: A Gravitational-Wave Transient Catalog of Compact Binary Mergers Observed by LIGO and Virgo during the First and Second Observing Runs
- GW190425: Observation of a Compact Binary Coalescence with Total Mass
- Laser Interferometer Space Antenna
- Cosmological Backgrounds of Gravitational Waves
- Binary Black Hole Population Properties Inferred from the First and Second Observing Runs of Advanced LIGO and Advanced Virgo
- Tests of General Relativity with the Binary Black Hole Signals from the LIGO-Virgo Catalog GWTC-1
- Black holes, gravitational waves and fundamental physics: a roadmap
- Prospects for detection of detached double white dwarf binaries with Gaia, LSST and LISA
- Predicting the LISA white dwarf binary population in the Milky Way with cosmological simulations
- Detecting hierarchical stellar systems with LISA
- Populations of double white dwarfs in Milky Way satellites and their detectability with LISA
- Detectability of double white dwarfs in the Local Group with LISA
- Listening to the gravitational wave sound of circumbinary exoplanets
- Milky Way Satellites Shining Bright in Gravitational Waves
- Probing Planets in Extragalactic Galaxies Using Quasar Microlensing
- Circumbinary exoplanets and brown dwarfs with the Laser Interferometer Space Antenna
- Unveiling the Gravitational Universe at μ-Hz Frequencies
- From B Modes to Quantum Gravity and Unification of Forces
Cited by in corpus (4)
- Prospects for detecting exoplanets around double white dwarfs with LISA and Taiji
- The quest for Magrathea planets I: formation of second generation exoplanets around double white dwarfs
- Statistics of Magrathea exoplanets beyond the Main Sequence. Simulating the long-term evolution of circumbinary giant planets with TRES
- Astrophysics with the Laser Interferometer Space Antenna