From marco.depetris at roma1.infn.it  Mon May 22 15:45:22 2017
From: marco.depetris at roma1.infn.it (Marco De Petris)
Date: Mon, 22 May 2017 15:45:22 +0200
Subject: [astroseminar@Sapienza]  31/05/2017 at 16:00 Stefano Ettori
Message-ID: <c43f62de42aea94c4b26b408b5c357de@roma1.infn.it>

Title: X-ray, Sunyeav-Zel'dovich signal and dark matter in galaxy 
clusters
Speaker: Stefano Ettori
Institute: INAF Osservatorio Astronomico, Bologna ITALY
Date: Wednesday, 31 May 2017
Time: 4:00 pm
Location: Aula Conversi, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
The distribution of the gravitating and baryonic mass in galaxy 
clusters is
key information to use them as astrophysical laboratories and 
cosmological
probes. I'll discuss the current status in reconstructing the radial 
profiles
of the gas mass, the total mass and other thermodynamical properties 
from
observations via X-rays and the Sunyeav-Zeldovich effect, highlighting 
the
present limitations and biases, in particular in the clusters' 
outskirts and
at high-redshift, where we have obtained the first constraint on the
concentration-mass relation at z>0.7 from X-ray analysis only.
I'll show how the best constraints available on the distribution of the
baryonic and hydrostatic mass in nearby clusters we have recently 
obtained
are in conflict with scenarios alternative to the cold dark matter. 
I'll
elucidate how Athena, the next-generation X-ray observatory and ESA-L2
mission, will address these issues.

web: https://agenda.infn.it/conferenceDisplay.py?confId=13350

_______________________________________________
astroseminar mailing list
astroseminar at roma1.infn.it
https://lists2.roma1.infn.it/mailman/listinfo/astroseminar

-----------------------------------------------------------------
dr. Marco De Petris
Dip. Fisica - Univ. di Roma "La Sapienza"
Piazzale Aldo Moro 2 - 00185 Roma - ITALY
tel: (+39) 06 49914690 - fax: (+39) 06 4957697
e-mail: marco.depetris at roma1.infn.it
http://oberon.roma1.infn.it/marco/MDP_webpage/
skype: marcodepe

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From elia.battistelli at roma1.infn.it  Tue May 23 10:47:20 2017
From: elia.battistelli at roma1.infn.it (Elia Battistelli)
Date: Tue, 23 May 2017 10:47:20 +0200
Subject: [astroseminar@Sapienza] 24/05/2017 at 14:00: Joao Magueijo
Message-ID: <8efecbd89d33c209bd2780b1e01b2473@roma1.infn.it>

Title: The most predictive cosmological theory
Speaker:   Prof. Joao Magueijo
Institute: Imperial College London
Date: Wednesday, 24 May 2017
Time: 2:00pm
Location: Sala Lauree, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
Although inflation has been paraded as an observational success, the 
lack of a firm prediction applicable to the whole of the paradigm should 
be seen as a major drawback, at least until information external to 
cosmology selects a priori one of its many models. In contrast I present 
a theory with two disformal metrics, one for matter fields, another for 
gravity, which has the benefit of making a sharp prediction for the 
spectral index of the scalar fluctuations, and the amount of tensor 
modes. The origin of the fluctuations in this theory is thermal rather 
than quantum, and the model is a critical boundary in the space of all 
theories, associated in at least two ways with a phase transition. I 
discuss other implications of the model, namely non-Gaussianty. I also 
review similar models loosely based on the Horava Lifshtz theory, with a 
far less developed cosmology, but closer connections with quantum 
gravity.

web: https://agenda.infn.it/conferenceDisplay.py?confId=13515


From marco.depetris at roma1.infn.it  Wed May 31 08:03:07 2017
From: marco.depetris at roma1.infn.it (Marco De Petris)
Date: Wed, 31 May 2017 08:03:07 +0200
Subject: [astroseminar@Sapienza]  Today at 16:00 Stefano Ettori
Message-ID: <C3E3DBE7-C407-4B10-8F7D-F0AA16926CD4@roma1.infn.it>

Title: X-ray, Sunyeav-Zel'dovich signal and dark matter in galaxy clusters
Speaker: Stefano Ettori
Institute: INAF Osservatorio Astronomico, Bologna ITALY
Date: Wednesday, 31 May 2017
Time: 4:00 pm
Location: Aula Conversi, Marconi Building, Dept. of Physics, Sapienza University

Abstract:
The distribution of the gravitating and baryonic mass in galaxy clusters is
key information to use them as astrophysical laboratories and cosmological
probes. I'll discuss the current status in reconstructing the radial profiles
of the gas mass, the total mass and other thermodynamical properties from
observations via X-rays and the Sunyeav-Zeldovich effect, highlighting the
present limitations and biases, in particular in the clusters' outskirts and
at high-redshift, where we have obtained the first constraint on the
concentration-mass relation at z>0.7 from X-ray analysis only.
I'll show how the best constraints available on the distribution of the
baryonic and hydrostatic mass in nearby clusters we have recently obtained
are in conflict with scenarios alternative to the cold dark matter. I'll
elucidate how Athena, the next-generation X-ray observatory and ESA-L2
mission, will address these issues.

web: https://agenda.infn.it/conferenceDisplay.py?confId=13350

_______________________________________________
astroseminar mailing list
astroseminar at roma1.infn.it
https://lists2.roma1.infn.it/mailman/listinfo/astroseminar

-----------------------------------------------------------------
dr. Marco De Petris
Dip. Fisica - Univ. di Roma "La Sapienza"
Piazzale Aldo Moro 2 - 00185 Roma - ITALY
tel: (+39) 06 49914690 - fax: (+39) 06 4957697
e-mail: marco.depetris at roma1.infn.it
http://oberon.roma1.infn.it/marco/MDP_webpage/
skype: marcodepe

-----------------------------------------------------------------
N.B: Computers are like air conditioners: they stop working properly when
you open windows.
-----------------------------------------------------------------

This message and any attachments are intended for the use of the addressee
or addressees only.
The unauthorised disclosure, use, dissemination or copying (either in whole
or in part) of its content is not permitted.
If you received this message in error, please notify the sender and delete
it from your system.
Emails can be altered and their integrity cannot be guaranteed by the
sender.

Please consider the environment before printing this email.

