A Simultaneous Dual-site Technosignature Search Using International LOFAR Stations
Artikel i vetenskaplig tidskrift, 2023

The Search for Extraterrestrial Intelligence aims to find evidence of technosignatures, which can point toward the possible existence of technologically advanced extraterrestrial life. Radio signals similar to those engineered on Earth may be transmitted by other civilizations, motivating technosignature searches across the entire radio spectrum. In this endeavor, the low-frequency radio band has remained largely unexplored; with prior radio searches primarily above 1 GHz. In this survey at 110-190 MHz, observations of 1,631,198 targets from TESS and Gaia are reported. Observations took place simultaneously with two international stations (noninterferometric) of the Low Frequency Array in Ireland and Sweden. We can reject the presence of any Doppler drifting narrowband transmissions in the barycentric frame of reference, with equivalent isotropic radiated power of 1017 W, for 0.4 million (or 1.3 million) stellar systems at 110 (or 190) MHz. This work demonstrates the effectiveness of using multisite simultaneous observations for rejecting anthropogenic signals in the search for technosignatures.

Författare

Owen A. Johnson

University College Dublin

University of California

Trinity College Dublin

Vishal Gajjar

SETI Institute

University of California

E. F. Keane

National University of Ireland

Trinity College Dublin

David J. McKenna

Trinity College Dublin

Dublin Institute for Advanced Studies

Charles Giese

Max-Planck-Gesellschaft

Trinity College Dublin

Ben McKeon

National University of Ireland

University of Limerick

Tobia Carozzi

Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium

Cloe Alcaria

Universite Paul Sabatier Toulouse III

Trinity College Dublin

Aoife Brennan

European Southern Observatory Santiago

National University of Ireland

Trinity College Dublin

Bryan Brzycki

University of California

S. Croft

SETI Institute

University of California

Jamie Drew

National Aeronautics and Space Administration (NASA)

Richard Elkins

University of California

P. T. Gallagher

Dublin Institute for Advanced Studies

Ruth Kelly

University College London (UCL)

Matt Lebofsky

University of California

D. MacMahon

University of California

Joseph McCauley

Trinity College Dublin

Imke de Pater

University of California

Shauna Rose Raeside

Dublin Institute for Advanced Studies

Dublin City University

Trinity College Dublin

A. Siemion

SETI Institute

University of California

S. Pete Worden

National Aeronautics and Space Administration (NASA)

Astronomical Journal

0004-6256 (ISSN) 1538-3881 (eISSN)

Vol. 166 5 193

Onsala rymdobservatorium infrastruktur

Vetenskapsrådet (VR) (2017-00648), 2018-01-01 -- 2021-12-31.

Ämneskategorier (SSIF 2011)

Telekommunikation

Astronomi, astrofysik och kosmologi

DOI

10.3847/1538-3881/acf9f5

Mer information

Senast uppdaterat

2025-03-09