Galaxy formation and evolution

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Horizon-AGN virtual observatory -- 2: Template-free estimates of galaxy properties from colours

(2019)

Authors:

Iary Davidzon, Clotilde Laigle, Peter L Capak, Olivier Ilbert, Daniel C Masters, Shoubaneh Hemmati, Nikolaos Apostolakos, Jean Coupon, Sylvain de la Torre, Julien Devriendt, Yohan Dubois, Daichi Kashino, Stephane Paltani, Christophe Pichon
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How to Quench a Dwarf Galaxy: The Impact of Inhomogeneous Reionization on Dwarf Galaxies and Cosmic Filaments

(2019)

Authors:

Harley Katz, Marius Ramsoy, Joakim Rosdahl, Taysun Kimm, Jeremy Blaizot, Martin G Haehnelt, Leo Michel-Dansac, Thibault Garel, Clotilde Laigle, Julien Devriendt, Adrianne Slyz
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Population Estimates for Electromagnetically-Distinguishable Supermassive Binary Black Holes

(2019)

Authors:

Julian H Krolik, Marta Volonteri, Yohan Dubois, Julien Devriendt
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Tidal disruption events onto stellar black holes in triples

(2019)

Authors:

Giacomo Fragione, Nathan Leigh, Rosalba Perna, Bence Kocsis
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Cosmic ray acceleration to ultrahigh energy in radio galaxies

EPJ Web of Conferences EDP Sciences (2019)

Authors:

James H Matthews, Anthony R Bell, Anabella T Araudo, Katherine M Blundell

Abstract:

The origin of ultrahigh energy cosmic rays (UHECRs) is an open question. In this proceeding, we first review the general physical requirements that a source must meet for acceleration to 10-100 EeV, including the consideration that the shock is not highly relativistic. We show that shocks in the backflows of radio galaxies can meet these requirements. We discuss a model in which giant-lobed radio galaxies such as Centaurus A and Fornax A act as slowly-leaking UHECR reservoirs, with the UHECRs being accelerated during a more powerful past episode. We also show that Centaurus A, Fornax A and other radio galaxies may explain the observed anisotropies in data from the Pierre Auger Observatory, before examining some of the difficulties in associating UHECR anisotropies with astrophysical sources.
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