A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä

Galaxy group-associated distances to very high energy gamma-ray emitting BL Lacs KUV 00311−1938 and S2 0109+22



Tekijät: Koljonen, Karri I. I.; Lindfors, Elina; Nilsson, Kari; Heinämäki, Pekka; Kotilainen, Jari

Kustantaja: Oxford University Press

Julkaisuvuosi: 2024

Journal: Monthly Notices of the Royal Astronomical Society

Tietokannassa oleva lehden nimi: Monthly Notices of the Royal Astronomical Society

Vuosikerta: 531

Numero: 4

Aloitussivu: 5084

Lopetussivu: 5096

ISSN: 0035-8711

eISSN: 1365-2966

DOI: https://doi.org/10.1093/mnras/stae1512

Verkko-osoite: https://doi.org/10.1093/mnras/stae1512

Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/457147080

Preprintin osoite: https://arxiv.org/abs/2406.13786

Lisätietoja: The VLT/FORS2 data analysed here are available at the European Southern Observatory Science Archive Facility (http://archive.eso.org). The Gemini data is available at the Gemini Observatory archive (https://archive.gemini.edu). The SDSS data is available at the SDSS website: https://www.sdss4.org. The simulation data produced as part of this work are available from the authors on request.


Tiivistelmä

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 Universe.

Key words: BL Lacertae objects: general – galaxies: distances and redshifts – galaxies: groups: general.


Ladattava julkaisu

This is an electronic reprint of the original article.
This reprint may differ from the original in pagination and typographic detail. Please cite the original version.

Julkaisussa olevat rahoitustiedot: 
Research funded by European Research Council (101002352) | Academy of Finland (306531,317636,320045,346071)


Last updated on 2025-27-01 at 19:39