BCCP Seminars

Tuesday, November 25

Location: UCB, Hearst Field Annex B-1 – 1:10 pm
Speaker: Camille Avestruz, Yale
Title: “Cosmological Simulations of Galaxy Cluster Outskirts”
Abstract: The observational study of galaxy cluster outskirts is a new territory to probe the thermodynamic and chemical structure of the X-ray emitting intracluster medium (ICM). Cluster outskirts are particularly important for modeling the Sunyaev-Zel’dovich effect, which is sensitive to hot electrons at all radii and has been used to detect hundreds of galaxy clusters with recent microwave cluster surveys. In cluster-based cosmology, measurements of cluster outskirts are an important avenue for estimating the cluster mass, as the outskirts are less sensitive to baryonic processes that dominate the cluster core. However, recent observations of cluster outskirts deviate from theoretical expectations, indicating that cluster outskirts are more complicated than previously thought. Computational modeling of cluster outskirts is necessary to interpret these observations. I will present cosmological simulations of galaxy cluster formation that follow the thermodynamic and chemical structures in the virialization regions of the ICM and transition to the IGM. Specifically, I will discuss how observational signatures of galaxy clusters are affected by gas flows, inhomogeneities in the ICM, and non-equilibrium physics.

 

 

 

BCCP events this week

Tuesday, November 25

Location: UCB, Hearst Field Annex B-1 – 1:10 pm
Speaker: Camille Avestruz, Yale
Title: “Cosmological Simulations of Galaxy Cluster Outskirts”
Abstract: The observational study of galaxy cluster outskirts is a new territory to probe the thermodynamic and chemical structure of the X-ray emitting intracluster medium (ICM). Cluster outskirts are particularly important for modeling the Sunyaev-Zel’dovich effect, which is sensitive to hot electrons at all radii and has been used to detect hundreds of galaxy clusters with recent microwave cluster surveys. In cluster-based cosmology, measurements of cluster outskirts are an important avenue for estimating the cluster mass, as the outskirts are less sensitive to baryonic processes that dominate the cluster core. However, recent observations of cluster outskirts deviate from theoretical expectations, indicating that cluster outskirts are more complicated than previously thought. Computational modeling of cluster outskirts is necessary to interpret these observations. I will present cosmological simulations of galaxy cluster formation that follow the thermodynamic and chemical structures in the virialization regions of the ICM and transition to the IGM. Specifically, I will discuss how observational signatures of galaxy clusters are affected by gas flows, inhomogeneities in the ICM, and non-equilibrium physics.


Events this week

Monday, November 17

Theoretical Astrophysics Seminars
Location: UCB – Hearst Field Annex B5, 12:10 p.m.
Speaker: Jing Luan (Caltech)
Title: “Historical Heat Responsible for Enceladus’s Plume”

4D Seminars
Location: UCB – 402 Old Le Conte, 2:30 p.m.
Speaker: Seyda Ipek (Washington U., Seattle)
Title: CP Violation in Pseudo-Dirac Fermion Oscillations”

Physics Department Colloquium
Location: UCB, 1 Le Conte Hall – 4:15 p.m.
Speaker: David Demille (Yale)
Title: “A Tabletop-scale Probe for TeV Physics: the Electric Dipole Moment of the Electron”

Tuesday, November 18

Berkeley Cosmology Seminars
Location: UCB, Hearst Field Annex B-1 – 1:10 pm
Speaker: Emanuele Castorina, SISSA
Title: “Massive neutrinos and the Large Scale Structures of the Universe”
Abstract: Massive neutrinos have peculiar effects on several observables in current and future redshift surveys. A precise determination of them is crucial not only to constraint properly neutrino masses but also to avoid potential systematic errors in the determination of other cosmological parameters, e.g. the dark energy equation of state. In this talk, after a brief review of linear theory results, I will discuss, with the help of a large suite of N-body simulations, the effect of massive neutrinos on different cosmological probes, like the abundance of massive clusters, the non linear matter power spectrum and its relation to the galaxy power spectrum, redshift space distorsions, and the bispectrum.

String Seminar
Location: UCB – 402 Old Le Conte, 3:40 p.m.
Speaker: Christopher Beem (IAS)
Title: “Chiral Symmetry Algebras in Four and Six Dimensions”

Physics RPM - no RPM today

Wednesday, November 19

BOSS Lunch
Location: LBNL – 50B-4205, noon

Interdisciplinary Instrumentation Colloquium
Location: LBNL – 15-253, 12 p.m.
Speakers: *Cameron Geddes (ATAP): “Measuring the energy-angle spectrum of a single burst of 10^9 gamma rays” / *Azriel Goldschmidt (NS): “Identifying one single barium ion in one ton of xenon” / *Qing Ji (IBT): “Inventing an anti-neutrino generator” 

Particle Theory Seminar
Location: LBNL – 50A-5132, 2:00 p.m.
Speaker:  Gustavo Tavares (BU)
Title: tba

String Group Meeting – cancelled

CANDi
Location: LBNL, 50-5026, 3:30 p.m.
Discussion: Cosmological Leverage from the Matter Power Spectrum in the Presence of Baryon and Nonlinear Effects ArXiv #: 1411.3725

Thursday, November 20

Astronomy Lunch
Location: UCB, B5 Hearst Field Annex – 12:30 p.m.
Speakers: tba

Special Particle Theory Seminar
Location: LBNL – 50A-5132, 2:00 p.m.
Speaker: Clifford Cheung (Caltech)
Title: “Accidental Holomorphy in 4D EFTs”

Astronomy Colloquium
Location: UCB, 2 LeConte Hall, 4:00 p.m.
Speaker: Fiona Harrison (Caltech)
Title: tba
Abstract:  tba

Physics Research Progress Meeting
Location:  LBNL – 50A-5132, 4:00 p.m.
Speaker: Gianpaolo Carosi (LLNL)
Title: “The ADMX Experiment“
Abstract: The nature of dark matter is one of the great mysteries of modern physics. Existence of dark matter has been inferred from its gravitational effects over many distance scales, but currently no known particle can account for the observed data. As a result, new particles beyond the standard model have been suggested. The axion is one such particle that was originally devised as a solution to the strong-CP problem in nuclear physics (or the peculiar absence of a measurable electric dipole moment in the neutron). The Axion Dark Matter eXperiment (ADMX), and its sister experiment ADMX-High Frequency (ADMX-HF), are designed to detect axions by using large microwave cavities immersed in a strong magnetic field to resonantly convert the axion’s rest mass into detectable photons. In this talk I will describe the history of axion searches and the ADMX experiment in particular, which ran at LLNL for over a decade before being moved to the University of Washington. I will then discuss the upgrades to the ADMX experiment as it prepares for its upcoming search with orders-of-magnitude greater sensitivity. I will also outline R&D efforts currently being undertaken to expand the search range of ADMX further and ultimately determine if axions are, or are not, the major dark matter component of the Universe.

Friday, November 21

INPA Seminar
Location: LBNL, 50-5026, 12 p.m.
Speaker: Ryan Cooke (UC Santa Cruz)

Title: “The primordial deuterium abundance and the search for new physics
Abstract: We are currently in an exciting era of precision cosmology. With the release of the cosmic microwave background data recorded by the Planck satellite, we are now in a position to accurately test the standard model of cosmology and particle physics. In this talk, I will present several precise measurements of the primordial abundance of deuterium – the most accurate measurements to date – derived from redshift ~3 metal-poor damped Lyman-alpha systems. These data have offered a new insight into the physical laws of the Universe just minutes after the Big Bang. Such precise measures, when analyzed in conjunction with the Planck data, now place strong bounds on both the total amount of visible matter in the Universe and the effective number of neutrino species. These data further provide new limits on physics beyond the standard model. I will discuss our ongoing survey to obtain new precision measures of the primordial nuclei in the era of the 30m class telescopes.

SSL Colloquium
Location: SSL, Addition conference room, 3 p.m.
Speaker: Julian Bautista (Univ of Utah)
Title: “Baryon acoustic oscillations in the Lyman-alpha forest of BOSS quasars”

CtU2015 registration

Visitors

 

Visitors Program

We maintain an active program for visiting scholars. BCCP hosts visitors at all levels, from senior scientists to postdocs, graduate students, and undergraduates. If you would like to visit BCCP, please fill out the form here.

Longer term visits involving collaborative activities with BCCP members are especially encouraged. BCCP can provide financial support for longer term visitors working with BCCP members on BCCP related projects. The applications are reviewed by a committee several times a year. All decisions are based on the availability of space and funding.

Fall 2014

  • Airam Marcos-Caballero (IFCA, Spain) – September 14-December 14
  • Miguel Zumalacárregui (University of Heidelberg) – September
  • Zvonimir Vlah (Univ of Zurich, ITP) – November 1-December 15

Summer 2014

  • Louis Garrigue (ENS-Ecole Normale Supérieure, Paris) – March 17-July 11
  • Jeremy Tinker (NYU) – June 17-August 21
  • Tamara Davis (U of Queensland) – June 24-27
  • Geraint Lewis (U of Sydney) – June 26-27

Spring 2014

  • Evan Scannapieco (ASU) – January 3-May 31
  • Irshad Mohammed (University of Zurich) – January 9-June 30
  • Miguel Zumalacárregui (University of Heidelberg) – January 22-February 10
  • Paul Shellard (University of Cambridge) – February 6-7
  • Arka Banerjee (University of Illinois, Urbana-Champaign) – February 9-22
  • Tong-Jie Zhang (Beijing Normal University) – February 27-May 27
  • Zvonimir Vlah (Univ of Zurich, ITP) – March 3-April 2
  • Louis Garrigue (ENS-Ecole Normale Supérieure, Paris) – March 17-July 11
  • Neal Dalal (Univ of Illinois) – March 26-28
  • Steffen Hess (AIP, Leibnitz Inst for Astrophysics, Potsdam) – May 12-22

Fall 2013

  • Elizabeth Krause (U Penn) – September 10-11
  • Zvonimir Vlah (Univ of Zurich, ITP) – September 17-December 20
  • Michael Kopp (LMU) – October 28-November 2
  • Juliana Kwan (Argonne National Lab) – November 13-22
  • Amol Upadhye (Argonne National Lab) – November 13-December 20
  • Teppei Okumura (IEU Korea) – November 13-30
  • Jonathan Blazek (OSU) – December 5-13

Summer 2013

  • Azadeh M. Dizgah (SUNY-Buffalo) – May 16-July 16
  • Jeremy Tinker (NYU) – May 30-August 20
  • Sudeep Das (Argonne National Lab) – July 9-27
  • Daniel Holz (Chicago) – August 27-28
  • Neal Dalal (Illinois) – August 30,
  • Wayne Hu (Chicago) – August 29-30
  • Joel Johansson (Stockholm) – August 29-30

Spring 2013

  • Alireza Hojjati (IEU Korea) – January 14-February 5
  • Chris Blake (Swinburne) – January 14-February 5
  • Tamara Davis (Queensland) – January 14-18
  • Morag Scrimgeour (Western Australia) – January 14 -
  • Sudeep Das (Argonne National Lab) – January 28-31
  • Chiaki Hikage (Nagoya University) – February 10-16
  • Miguel Zumalacarregui (Universidad Autonoma de Madrid) – February 15-22
  • Jaiyul Yoo (Univ. of Zurich) – February 23 – April 27
  • Laura Baudis (Univ. of Zurich) – April 26-May 4

Fall 2012

  • Stephen Appleby (IEU Korea) – October 7-26, 2012
  • Roland de Putter (Caltech/JPL) – October 19-25, 2012
  • David Pietrobon (JPL) – October 19-26, 2012
  • Tobias Baldauf (ITP, University of Zurich) – September 12-December 9, 2012
  • Johan Samsing (DARK Cosmology Centre, Copenhagen) – February-December 2012
  • Masanori Sato (Nagoya University, Japan) – October 5 – November 22, 2012
  • Andreu Font (University of Zurich) – November-December 2012
  • Teppei Okumura (Institute for the Early Universe, Seoul, Korea) – November 5-December 21, 2012