caa a22 4500 445387467 CHVBK 20180317143036.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s10714-010-1104-3 doi (NATIONALLICENCE)springer-10.1007/s10714-010-1104-3 Exploring intermediate and massive black-hole binaries with the Einstein Telescope [Elektronische Daten] [Jonathan Gair, Ilya Mandel, M. Miller, Marta Volonteri] We discuss the capability of a third-generation ground-based detector such as the Einstein Telescope (ET) to enhance our astrophysical knowledge through detections of gravitational waves emitted by binaries including intermediate-mass and massive black holes. The design target for such instruments calls for improved sensitivity at low frequencies, specifically in the $${\sim 1-10}$$ Hz range. This will allow the detection of gravitational waves generated in binary systems containing black holes of intermediate mass, $${\sim100-10000\,\,M_{\odot}}$$ . We primarily discuss two different source types—mergers between two intermediate mass black holes (IMBHs) of comparable mass, and intermediate-mass-ratio inspirals (IMRIs) of smaller compact objects with mass $${\sim1-10\,\,M_{\odot}}$$ into IMBHs. IMBHs may form via two channels: (i) in dark matter halos at high redshift through direct collapse or the collapse of very massive metal-poor Population III stars, or (ii) via runaway stellar collisions in globular clusters. In this paper, we will discuss both formation channels, and both classes of merger in each case. We review existing rate estimates where these exist in the literature, and provide some new calculations for the approximate numbers of events that will be seen by a detector like the Einstein Telescope. These results indicate that the ET may see a few to a few thousand comparable-mass IMBH mergers and as many as several hundred IMRI events per year. These observations will significantly enhance our understanding of galactic black-hole growth, of the existence and properties of IMBHs and of the astrophysics of globular clusters. We finish our review with a discussion of some more speculative sources of gravitational waves for the ET, including hypermassive white dwarfs and eccentric stellar-mass compact-object binaries. Springer Science+Business Media, LLC, 2010 Intermediate mass black holes nationallicence General relativity nationallicence Gravitational waves nationallicence Structure formation nationallicence White dwarfs nationallicence Gair Jonathan Institute of Astronomy, University of Cambridge, CB30HA, Cambridge, UK aut Mandel Ilya Department of Physics and Astronomy, Northwestern University, 60208, Evanston, IL, USA aut Miller M. Department of Astronomy and Center for Theory and Computation, University of Maryland, 20742, College Park, MD, USA aut Volonteri Marta Department of Astronomy, University of Michigan, 48109, Ann Arbor, MI, USA aut General Relativity and Gravitation Springer US; http://www.springer-ny.com 43/2(2011-02-01), 485-518 0001-7701 43:2<485 2011 43 10714 https://doi.org/10.1007/s10714-010-1104-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10714-010-1104-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gair Jonathan Institute of Astronomy, University of Cambridge, CB30HA, Cambridge, UK aut NATIONALLICENCE 700 1- Mandel Ilya Department of Physics and Astronomy, Northwestern University, 60208, Evanston, IL, USA aut NATIONALLICENCE 700 1- Miller M. Department of Astronomy and Center for Theory and Computation, University of Maryland, 20742, College Park, MD, USA aut NATIONALLICENCE 700 1- Volonteri Marta Department of Astronomy, University of Michigan, 48109, Ann Arbor, MI, USA aut NATIONALLICENCE 773 0- General Relativity and Gravitation Springer US; http://www.springer-ny.com 43/2(2011-02-01), 485-518 0001-7701 43:2<485 2011 43 10714 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer