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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/218253
Discovery of Merging Twin Quasars at z = 6.05
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We report the discovery of two quasars at a redshift of z = 6.05 in the process of merging. They were serendipitously discovered from the deep multiband imaging data collected by the Hyper Suprime-Cam (HSC) Subaru Strategic Program survey. The quasars, HSC J121503.42−014858.7 (C1) and HSC J121503.55−014859.3 (C2), both have luminous (>1043 erg s−1) Lyα emission with a clear broad component (full width at half maximum >1000 km s−1). The rest-frame ultraviolet (UV) absolute magnitudes are M1450 = − 23.106 ± 0.017 (C1) and −22.662 ± 0.024 (C2). Our crude estimates of the black hole masses provide in both sources. The two quasars are separated by 12 kpc in projected proper distance, bridged by a structure in the rest-UV light suggesting that they are undergoing a merger. This pair is one of the most distant merging quasars reported to date, providing crucial insight into galaxy and black hole build-up in the hierarchical structure formation scenario. A companion paper will present the gas and dust properties captured by Atacama Large Millimeter/submillimeter Array observations, which provide additional evidence for and detailed measurements of the merger, and also demonstrate that the two sources are not gravitationally lensed images of a single quasar.
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MATSUOKA, Y., IZUMI, T., ONOUE, M., STRAUSS, M. a., IWASAWA, Kazushi, KASHIKAWA, N., AKIYAMA, M., AOKI, K., ARITA, J., IMANISHI, M., ISHIMOTO, R., KAWAGUCHI, T., KOHNO, K., LEE, C.-h., NAGAO, T., SILVERMAN, J. d., TOBA, Y.. Discovery of Merging Twin Quasars at z = 6.05. _Astrophysical Journal_. 2024. Vol. 965, núm. L4. [consulta: 21 de gener de 2026]. ISSN: 0004-637X. [Disponible a: https://hdl.handle.net/2445/218253]