Optimizing the third generation of gravitational-wave observatories for Galactic astrophysics

Abstract

Gravitational-wave (GW) astrophysics is a rapidly expanding field, with plans to enhance the global ground-based observatory network through the addition of larger, more sensitive observatories: Einstein Telescope and Cosmic Explorer. These observatories will allow us to peer deeper into the sky, collecting GW events from farther away and earlier in the Universe. Within our own Galaxy, there is a plethora of interesting GW sources, including core-collapse supernovae, phenomena in isolated neutron stars and pulsars, and potentially novel sources. As GW observatories are directionally sensitive, their placement on the globe will affect the observation of Galactic sources. We analyze the performance of one-, two-, and three-observatory networks, both for sources at the Galactic center, as well as a source population distributed over the Galactic disk. We find that, for a single Cosmic Explorer or Einstein Telescope observatory, placement at near-equatorial latitudes provides the most reliable observation of the Galactic center. When a source population distributed over the Galactic disk is considered, the observatory location is less impactful, although equatorial observatories still confer an advantage over observatories at more extreme latitudes. For two- and three-node networks, the longitudes of the observatories additionally become important for consistent observation of the Galaxy.

21 pages, 14 figures. Updated to match the published version in ApJ

References in corpus (17)

• The NumPy array: a structure for efficient numerical computation
• GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run
• Sensitivity and Performance of the Advanced LIGO Detectors in the Third Observing Run
• Models of Pulsar Glitches
• LIGO Detector Characterization in the Second and Third Observing Runs
• A Horizon Study for Cosmic Explorer: Science, Observatories, and Community
• The BayesWave analysis pipeline in the era of gravitational wave observations
• Gwbench: a novel Fisher information package for gravitational-wave benchmarking
• Frequency-Dependent Responses in 3rd Generation Gravitational-Wave Detectors
• Search for Continuous Gravitational Waves from Scorpius X-1 in LIGO O2 Data
• Weighing Milky Way Satellites with LISA
• Gravitational radiation from magnetically funnelled supernova fallback onto a magnetar
• Prospects for Multimessenger Observations of Thorne-Żytkow Objects
• The Signature of Single-Degenerate Accretion Induced Collapse
• Global Optimization for Future Gravitational Wave Detectors' Sites
• Ground-Based Gravitational-Wave Astronomy in Australia: 2019 White Paper
• Target-based Optimization of Advanced Gravitational-Wave Detector Network Operations

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