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Updated: Feb 2, 2026

Assembly, Loading, and Alignment of an Analytical Ultracentrifuge Sample Cell
Published on: November 5, 2009
The multiple merger assembly of a hyperluminous obscured quasar at redshift 4.6
T Díaz-Santos1, R J Assef2, A W Blain3
1Núcleo de Astronomía, Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Ejército Libertador 441, Santiago, 8320000, Chile. tanio.diaz@mail.udp.cl.
Abstract:
Galaxy mergers and gas accretion from the cosmic web drove the growth of galaxies and their central black holes at early epochs. We report spectroscopic imaging of a multiple merger event in the most luminous known galaxy, WISE J224607.56-052634.9 (W2246-0526), a dust-obscured quasar at redshift 4.6, 1.3 billion years after the Big Bang. Far-infrared dust continuum observations show three galaxy companions around W2246-0526 with disturbed morphologies, connected by streams of dust likely produced by the dynamical interaction. The detection of tidal dusty bridges shows that W2246-0526 is accreting its neighbors, suggesting that merger activity may be a dominant mechanism through which the most luminous galaxies simultaneously obscure and feed their central supermassive black holes.
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