Science with the Einstein Telescope: a comparison of different designs
Abstract
The Einstein Telescope (ET), the European project for a third-generation gravitational-wave detector, has a reference configuration based on a triangular shape consisting of three nested detectors with 10 km arms, where in each arm there is a `xylophone' configuration made of an interferometer tuned toward high frequencies, and an interferometer tuned toward low frequencies and working at cryogenic temperature. Here, we examine the scientific perspectives under possible variations of this reference design. We perform a detailed evaluation of the science case for a single triangular geometry observatory, and we compare it with the results obtained for a network of two L-shaped detectors (either parallel or misaligned) located in Europe, considering different choices of arm-length for both the triangle and the 2L geometries. We also study how the science output changes in the absence of the low-frequency instrument, both for the triangle and the 2L configurations. We examine a broad class of simple `metrics' that quantify the science output, related to compact binary coalescences, multi-messenger astronomy and stochastic backgrounds, and we then examine the impact of different detector designs on a more specific set of scientific objectives.
Keywords
Cite
@article{arxiv.2303.15923,
title = {Science with the Einstein Telescope: a comparison of different designs},
author = {Marica Branchesi and Michele Maggiore and David Alonso and Charles Badger and Biswajit Banerjee and Freija Beirnaert and Enis Belgacem and Swetha Bhagwat and Guillaume Boileau and Ssohrab Borhanian and Daniel David Brown and Man Leong Chan and Giulia Cusin and Stefan L. Danilishin and Jerome Degallaix and Valerio De Luca and Arnab Dhani and Tim Dietrich and Ulyana Dupletsa and Stefano Foffa and Gabriele Franciolini and Andreas Freise and Gianluca Gemme and Boris Goncharov and Archisman Ghosh and Francesca Gulminelli and Ish Gupta and Pawan Kumar Gupta and Jan Harms and Nandini Hazra and Stefan Hild and Tanja Hinderer and Ik Siong Heng and Francesco Iacovelli and Justin Janquart and Kamiel Janssens and Alexander C. Jenkins and Chinmay Kalaghatgi and Xhesika Koroveshi and Tjonnie G. F. Li and Yufeng Li and Eleonora Loffredo and Elisa Maggio and Michele Mancarella and Michela Mapelli and Katarina Martinovic and Andrea Maselli and Patrick Meyers and Andrew L. Miller and Chiranjib Mondal and Niccolò Muttoni and Harsh Narola and Micaela Oertel and Gor Oganesyan and Costantino Pacilio and Cristiano Palomba and Paolo Pani and Antonio Pasqualetti and Albino Perego and Carole Pèrigois and Mauro Pieroni and Ornella Juliana Piccinni and Anna Puecher and Paola Puppo and Angelo Ricciardone and Antonio Riotto and Samuele Ronchini and Mairi Sakellariadou and Anuradha Samajdar and Filippo Santoliquido and B. S. Sathyaprakash and Jessica Steinlechner and Sebastian Steinlechner and Andrei Utina and Chris Van Den Broeck and Teng Zhang},
journal= {arXiv preprint arXiv:2303.15923},
year = {2023}
}
Comments
197 pages, 73 figures. v2: corrections in the part on the sensitivity to stochastic backgrounds. Accepted in JCAP