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arXiv, 2022

DOI: 10.48550/arxiv.2202.11722

American Astronomical Society, Astrophysical Journal Letters, 2(930), p. L24, 2022

DOI: 10.3847/2041-8213/ac67d8

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Search for High-energy Neutrino Emission from Galactic X-Ray Binaries with IceCube

Journal article published in 2022 by Rasha Abbasi ORCID, Markus Ackermann ORCID, J. Adams, C. de Clercq, Markus Ahlers ORCID, Ja A. Aguilar ORCID, Juan Antonio Aguilar Sánchez, M. Ahrens, Aa A. Alves, Nm M. Amin, Jm M. Alameddine ORCID, K. Andeen, T. Anderson, Gisela Anton ORCID, Yosuke Ashida ORCID and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Abstract We present the first comprehensive search for high-energy neutrino emission from high- and low-mass X-ray binaries conducted by IceCube. Galactic X-ray binaries are long-standing candidates for the source of Galactic hadronic cosmic rays and neutrinos. The compact object in these systems can be the site of cosmic-ray acceleration, and neutrinos can be produced by interactions of cosmic rays with radiation or gas, in the jet of a microquasar, in the stellar wind, or in the atmosphere of the companion star. We study X-ray binaries using 7.5 yr of IceCube data with three separate analyses. In the first, we search for periodic neutrino emission from 55 binaries in the Northern Sky with known orbital periods. In the second, the X-ray light curves of 102 binaries across the entire sky are used as templates to search for time-dependent neutrino emission. Finally, we search for time-integrated emission of neutrinos for a list of 4 notable binaries identified as microquasars. In the absence of a significant excess, we place upper limits on the neutrino flux for each hypothesis and compare our results with theoretical predictions for several binaries. In addition, we evaluate the sensitivity of the next generation neutrino telescope at the South Pole, IceCube-Gen2, and demonstrate its power to identify potential neutrino emission from these binary sources in the Galaxy.