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Search results in Astrophysics from PIRSA

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12/13 PSI - Explorations in Cosmology Lecture 9

Matthew Johnson York University
April 18, 2013

PIRSA:13040072
Astrophysics
12/13 PSI - Explorations in Cosmology Lecture 8

Matthew Johnson York University
April 17, 2013

PIRSA:13040071
Astrophysics
Results and highlights from Planck

Kendrick Smith Perimeter Institute for Theoretical Physics
April 16, 2013

PIRSA:13040123
Astrophysics
12/13 PSI - Explorations in Cosmology Lecture 7

Matthew Johnson York University
April 16, 2013

PIRSA:13040070
Astrophysics
12/13 PSI - Explorations in Cosmology Lecture 6

Matthew Johnson York University
April 15, 2013

PIRSA:13040069
Astrophysics
12/13 PSI - Explorations in Cosmology Lecture 5

Matthew Johnson York University
April 12, 2013

PIRSA:13040066
Astrophysics
Large Scale Bayesian Inference in Cosmology

Jens Jasche Institut d'Astrophysique de Paris
April 11, 2013

PIRSA:13040119
Astrophysics
12/13 PSI - Explorations in Cosmology Lecture 4

Matthew Johnson York University
April 11, 2013

PIRSA:13040065
Astrophysics
12/13 PSI - Explorations in Cosmology Lecture 3

Matthew Johnson York University
April 10, 2013

PIRSA:13040064
Astrophysics
The Death Throes of Massive Stars: Supernovae, Black Holes, and Neutrinos

Evan O'Connor California Institute of Technology
April 09, 2013

PIRSA:13040120
Astrophysics
12/13 PSI - Explorations in Cosmology Lecture 2

Matthew Johnson York University
April 09, 2013

PIRSA:13040063
Astrophysics
12/13 PSI - Explorations in Cosmology Lecture 1

Matthew Johnson York University
April 08, 2013

PIRSA:13040062
Astrophysics

12/13 PSI - Explorations in Cosmology Lecture 9

Matthew Johnson York University
April 18, 2013

PIRSA:13040072
Astrophysics
12/13 PSI - Explorations in Cosmology Lecture 8

Matthew Johnson York University
April 17, 2013

PIRSA:13040071
Astrophysics
Results and highlights from Planck

Kendrick Smith Perimeter Institute for Theoretical Physics
April 16, 2013

PIRSA:13040123
Astrophysics
Cosmological results from Planck, a third-generation satellite mission to measure the cosmic microwave background, have just been announced. These results improve constraints on essentially all cosmological parameters, and have implications for several preexisting sources of tension with the standard cosmological model, while also raising new puzzles. I will discuss these results and their significance, as well as the next steps forward.
12/13 PSI - Explorations in Cosmology Lecture 7

Matthew Johnson York University
April 16, 2013

PIRSA:13040070
Astrophysics
12/13 PSI - Explorations in Cosmology Lecture 6

Matthew Johnson York University
April 15, 2013

PIRSA:13040069
Astrophysics
12/13 PSI - Explorations in Cosmology Lecture 5

Matthew Johnson York University
April 12, 2013

PIRSA:13040066
Astrophysics
Large Scale Bayesian Inference in Cosmology

Jens Jasche Institut d'Astrophysique de Paris
April 11, 2013

PIRSA:13040119
Astrophysics
Already the last decade has witnessed unprecedented progress in the collection of cosmological data. Presently proposed and designed future cosmological probes and surveys permit us to anticipate the upcoming avalanche of cosmological information during the next decades.
The increase of valuable observations needs to be accompanied with the development of efficient and accurate information processing technology in order to analyse and interpret this data. In particular, cosmography projects, aiming at studying the origin and inhomogeneous evolution of
the Universe, involve high dimensional inference methods. For example, 3d cosmological density and velocity field inference requires to explore on the order of 10^7 or more parameters. Consequently, such projects critically rely on state-of-the-art information processing techniques
and, nevertheless, are often on the verge of numerical feasibility with present day computational resources. For this reason, in this talk I will address the problem of high dimensional Bayesian inference from cosmological data sets, subject to a variety of statistical and systematic uncertainties. In particular, I will focus on the discussion of selected Markov Chain Monte Carlo techniques, permitting to efficiently solve inference problems with on the order of 10^7 parameters. Furthermore, these methods will be exemplified in various cosmological applications, raging from 3d non-linear density and photometric redshift inference to 4d physical state inference. These techniques permit us to exploit cosmologically relevant information from
observations to unprecedented detail and hence will significantly contribute to the era of precision cosmology.
12/13 PSI - Explorations in Cosmology Lecture 4

Matthew Johnson York University
April 11, 2013

PIRSA:13040065
Astrophysics
12/13 PSI - Explorations in Cosmology Lecture 3

Matthew Johnson York University
April 10, 2013

PIRSA:13040064
Astrophysics
The Death Throes of Massive Stars: Supernovae, Black Holes, and Neutrinos

Evan O'Connor California Institute of Technology
April 09, 2013

PIRSA:13040120
Astrophysics
The endgame of massive star evolution is the gravitational-induced collapse of the central inert iron core. The collapse of the core continues until the matter reaches nuclear densities where the strong force between nucleons becomes dominant and provides sufficient pressure to stabilize the newly formed protoneutron star. What ensues is a complex multi-physics problem involving strong gravity, multidimensional hydrodynamic instabilities, magnetic fields, multispecies neutrino radiation, and supranuclear density physics to name a few.

We expect that most massive stars end this final stage of stellar evolution with a successful core-collapse supernova explosion. However, we also know that some of these core collapse events must fail and form stellar mass black holes.In his talk I will touch on two of the most important questions in core-collapse supernovae theory. I will briefly talk about what conditions are favourable for failed core-collapse supernovae (i.e. black hole formation). Conversely, I will discuss recent results from full three-dimensional, general-relativistic simulations of core-collapse and the implications for our understanding of the core-collapse supernova mechanism. If time permits, I'll discuss how neutrinos from the next galactic core-collapse supernova can help constrain properties of massive stars.
12/13 PSI - Explorations in Cosmology Lecture 2

Matthew Johnson York University
April 09, 2013

PIRSA:13040063
Astrophysics
12/13 PSI - Explorations in Cosmology Lecture 1

Matthew Johnson York University
April 08, 2013

PIRSA:13040062
Astrophysics

Title	Date	Collection	Type	Info
12/13 PSI - Explorations in Cosmology Lecture 9	2013‑04‑18	12/13 PSI - Explorations in Cosmology	Course	View details
12/13 PSI - Explorations in Cosmology Lecture 8	2013‑04‑17	12/13 PSI - Explorations in Cosmology	Course	View details
Results and highlights from Planck	2013‑04‑16	Cosmology and Gravitation	Scientific Series	View details
12/13 PSI - Explorations in Cosmology Lecture 7	2013‑04‑16	12/13 PSI - Explorations in Cosmology	Course	View details
12/13 PSI - Explorations in Cosmology Lecture 6	2013‑04‑15	12/13 PSI - Explorations in Cosmology	Course	View details
12/13 PSI - Explorations in Cosmology Lecture 5	2013‑04‑12	12/13 PSI - Explorations in Cosmology	Course	View details
Large Scale Bayesian Inference in Cosmology	2013‑04‑11	Cosmology and Gravitation	Scientific Series	View details
12/13 PSI - Explorations in Cosmology Lecture 4	2013‑04‑11	12/13 PSI - Explorations in Cosmology	Course	View details
12/13 PSI - Explorations in Cosmology Lecture 3	2013‑04‑10	12/13 PSI - Explorations in Cosmology	Course	View details
The Death Throes of Massive Stars: Supernovae, Black Holes, and Neutrinos	2013‑04‑09	Cosmology and Gravitation	Scientific Series	View details
12/13 PSI - Explorations in Cosmology Lecture 2	2013‑04‑09	12/13 PSI - Explorations in Cosmology	Course	View details
12/13 PSI - Explorations in Cosmology Lecture 1	2013‑04‑08	12/13 PSI - Explorations in Cosmology	Course	View details

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Format results

12/13 PSI - Explorations in Cosmology Lecture 9

12/13 PSI - Explorations in Cosmology Lecture 8

Results and highlights from Planck

12/13 PSI - Explorations in Cosmology Lecture 7

12/13 PSI - Explorations in Cosmology Lecture 6

12/13 PSI - Explorations in Cosmology Lecture 5

Large Scale Bayesian Inference in Cosmology

12/13 PSI - Explorations in Cosmology Lecture 4

12/13 PSI - Explorations in Cosmology Lecture 3

The Death Throes of Massive Stars: Supernovae, Black Holes, and Neutrinos

12/13 PSI - Explorations in Cosmology Lecture 2

12/13 PSI - Explorations in Cosmology Lecture 1

12/13 PSI - Explorations in Cosmology Lecture 9

12/13 PSI - Explorations in Cosmology Lecture 8

Results and highlights from Planck

12/13 PSI - Explorations in Cosmology Lecture 7

12/13 PSI - Explorations in Cosmology Lecture 6

12/13 PSI - Explorations in Cosmology Lecture 5

Large Scale Bayesian Inference in Cosmology

12/13 PSI - Explorations in Cosmology Lecture 4

12/13 PSI - Explorations in Cosmology Lecture 3

The Death Throes of Massive Stars: Supernovae, Black Holes, and Neutrinos

12/13 PSI - Explorations in Cosmology Lecture 2

12/13 PSI - Explorations in Cosmology Lecture 1