Galaxy group-associated distances to very high energy gamma-ray emitting BL Lacs KUV 00311-1938 and S2 0109+22
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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13
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Monthly Notices of the Royal Astronomical Society, Volume 531, issue 4, pp. 5084-5096
Abstract
Blazars constitute the most numerous source class in the known extragalactic population of very high energy (VHE) gamma-ray sources. However, determining their redshifts is often challenging due to weak or non-existent emission lines in their spectra. This study focuses on two BL Lacs, KUV 00311−1938 and S2 0109+22, where previous attempts at redshift determination have faced difficulties. By combining spectroscopic observations with photometric redshift estimates, we tentatively assign a redshift of z = 0.634 to KUV 00311−1938 and a likely redshift of z = 0.49 to S2 0109+22. Establishing redshift estimates for high-redshift blazars is crucial for understanding extragalactic VHE gamma-ray sources and their interactions with the surrounding UniverseDescription
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Koljonen, K I I, Lindfors, E, Nilsson, K, Heinämäki, P & Kotilainen, J K 2024, 'Galaxy group-associated distances to very high energy gamma-ray emitting BL Lacs KUV 00311-1938 and S2 0109+22', Monthly Notices of the Royal Astronomical Society, vol. 531, no. 4, pp. 5084-5096. https://doi.org/10.1093/mnras/stae1512