Events this week

Monday, November 24

Theoretical Astrophysics Seminars
Location: UCB – Hearst Field Annex B5, 12:10 p.m.
Speaker: Dyan Nelson (Harvard/CfA)
Title: “How Galaxies Acquire their Gas: Perspectives from Modern Cosmological Simulations”

4D Seminars
Location: UCB – 402 Old Le Conte, 2:30 p.m.
Speaker: Bridget Bertoni (Washington U., Seattle)
Title: “Dark Matter – Neutrino Interactions: Solving the Small Scale Structure Problem and is Implications”

Physics Department Colloquium
Location: UCB, 1 Le Conte Hall – 4:15 p.m.
Speaker: Philip Kim (Harvard)
Title: “Materials in 2-dimensions and Beyond: 10 Years after Graphene”

Tuesday, November 25

Berkeley Cosmology Seminars
Location: UCB, Hearst Field Annex B-1 – 1:10 pm
Speaker: Camille Avestruz (Yale)
Title: “Cosmological Simulations of Galaxy Cluster Outskirts”
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.

String Seminar – no seminar today

Physics RPM
Location: LBNL – 50A-5132, 4:00 p.m.
Speaker: Boris Leistedt (UCL)
Title: “Measuring Primordial Non-Gaussianities with Photometric Quasars”
Abstract: Quasars are highly biased tracers of the large-scale structure and therefore powerful probes of the initial conditions and the evolution of the universe. However, current spectroscopic catalogs are relatively small for studying the clustering of quasars on large-scales and over extended redshift ranges. Hence one must resort to photometric catalogs, which include large numbers of quasars identified using imaging data but suffer from significant stellar contamination and systematic uncertainties. I will present a detailed analysis of the photometric quasars from the Sloan Digital Sky Survey, and the resulting constraints on the quasar bias and primordial non-Gaussianity. The constraints on $f_{\rm NL}$, its spectral index, and $g_{\rm NL}$, are the tightest ever obtained from a single population of quasars or galaxies, and are competitive with the results obtained with WMAP, demonstrating the potential of quasars to complement CMB experiments. These results take advantage of a novel technique, ‘extended mode projection’, to mitigate the complex spatially-varying systematics present in the survey in a blind and robust fashion. This work is a new step towards the exploitation of data from the Dark Energy Survey, Euclid and LSST, which will require a careful mitigation of systematics in order to robustly constrain new physics.

Wednesday, November 26

BOSS Lunch
Location: LBNL – tba

Particle Theory Seminar – no seminar today
String Group Meeting – no meeting today

Location: LBNL, 50-5026, 3:30 p.m.
Discussion: *Multiple Images of a Highly Magnified Supernova Formed by an Early-Type Cluster Galaxy Lens, ArXiv #: 1411.6009 / * Near optimal bispectrum estimators for large-scale structure,
ArXiv #: 1411.6595

November 27-28 – UCB / LBNL closed - Happy Thanksgiving !


BCCP Seminars

Tuesday, December 2

Location: UCB, Hearst Field Annex B-1 – 1:10 pm
Speaker: Jes Ford, UBC
Title: tba
Abstract: tba

Tuesday, December 9

Location: UCB, Hearst Field Annex B-1 – 1:10 pm
Speaker: Doug Watson, Chicago
Title: tba
Abstract: tba



BCCP events this week

Tuesday, December 2

Location: UCB, Hearst Field Annex B-1 – 1:10 pm
Speaker: Jes Ford, UBC
Title: tba
Abstract: tba

CtU2015 registration



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