From raffaella.schneider at roma1.infn.it  Mon Sep 16 08:00:56 2019
From: raffaella.schneider at roma1.infn.it (raffaella.schneider at roma1.infn.it)
Date: Mon, 16 Sep 2019 08:00:56 +0200
Subject: [astroseminar@Sapienza] Seminar by Pratika Dayal, monday sept 16,
	4 pm
Message-ID: <0CF1FB5F-9605-49F3-B87A-3933938FFD5D@roma1.infn.it>

Monday 16 September, 4 pm
Aula Rasetti, Physics Department
Speaker: Pratika Dayal (Kapteyn Institute, University of Groningen)

Title: Early galaxy formation and its large-scale effects

Galaxy formation in the first billion years mark a time of great upheaval in the history of the Universe: as the first sources of light, these galaxies ended the 'cosmic dark ages' and produced the first 
photons that could break apart the hydrogen atoms suffusing all of space starting the process of cosmic reionization. As the earliest building blocks, the galaxies that formed in the first billion years also
determine the physical properties of all subsequent galaxy populations. I will start by introducing the reionization process and detail the reasons foe which the history and topology of reionization 
remain debated. I will then show how cross-correlations of 21cm data with the underlying galaxy population, in the forthcoming era of 21cm cosmology, will yield tantalising constraints on the 
average intergalactic medium ionization state as well as the reionization topology (outside-in versus inside-out). Time permitting, I will try to give a flavour of how the assembly of early galaxies, 
accessible with the forthcoming James Webb Space Telescope, can provide a powerful testbed for Dark Matter models  beyond "Cold Dark Matter".











From raffaella.schneider at roma1.infn.it  Tue Sep 17 12:45:05 2019
From: raffaella.schneider at roma1.infn.it (raffaella.schneider at roma1.infn.it)
Date: Tue, 17 Sep 2019 12:45:05 +0200
Subject: [astroseminar@Sapienza] Amaldi Research Center seminar by Marta
 Volonteri, Dipartimento di Fisica, 26 September 3 pm
Message-ID: <33969FA2-70A8-43D6-A8C8-131038BC478A@roma1.infn.it>

Thursday September 26, 3 pm
Aula Conversi, Dipartimento di Fisica


Marta Volonteri
(Institut d?Astrophysique de Paris)

Massive black hole binaries in the cosmos

Massive black holes weighing from a few tens of thousands to tens of billions of solar masses inhabit the centers of today?s galaxies, 
including our own Milky Way. Massive black holes also shone as quasars in the past, with the earliest detected a mere billion years 
after the Big Bang. Along cosmic time, encounters between galaxies hosting massive black holes in their centers are expected to have 
produced binary massive black holes that eventually coalesced by emission of gravitational waves. I will discuss the physical processes 
through which massive black holes pair and bind, and how we can use gravitational wave observations with ESA?s planned satellite 
LISA to constrain the evolving population of massive black holes. 


https://agenda.infn.it/event/19169/ <https://agenda.infn.it/event/19169/>















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From elia.battistelli at roma1.infn.it  Thu Sep 26 10:25:24 2019
From: elia.battistelli at roma1.infn.it (Elia Battistelli)
Date: Thu, 26 Sep 2019 10:25:24 +0200
Subject: [astroseminar@Sapienza] today at 15:00: Marta Volonteri ( Amaldi
	Research Center seminar)
Message-ID: <e5669e5bd0e7ca9d2b56277f3a54ba13@roma1.infn.it>

AMALDI RESEARCH CENTER SEMINAR

Title: Massive black hole binaries in the cosmos
Speaker: Marta Volonteri
Institution: Institut d'Astrophysique de Paris
Date: Thursday, 26 September 2019
Time: 3:00pm
Location: Aula Conversi, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
Massive black holes weighing from a few tens of thousands to tens of 
billions of solar masses inhabit the centers of today?s galaxies, 
including our own Milky Way. Massive black holes also shone as quasars 
in the past, with the earliest detected a mere billion years after the 
Big Bang. Along cosmic time, encounters between galaxies hosting massive 
black holes in their centers are expected to have produced binary 
massive black holes that eventually coalesced by emission of 
gravitational waves. I will discuss the physical processes through which 
massive black holes pair and bind, and how we can use gravitational wave 
observations with ESA?s planned satellite LISA to constrain the evolving 
population of massive black holes.

web: https://agenda.infn.it/event/19169/


