Conveners
Cosmology and Astrophysics: Monday morning
- James Annis (Fermilab)
Cosmology and Astrophysics: Tuesday morning
- Neelima Sehgal (Stony Brook University)
Cosmology and Astrophysics: Tuesday afternoon
- Bradford Benson (Fermilab)
Kirsten Tollefson
(Michigan State University)
31/07/2017, 10:45
Cosmology and Astrophysics
Presentation
The High Altitude Water Cherenkov (HAWC) Gamma-ray Observatory was completed in March 2015 and is now giving us a new view of the sky. HAWC is a continuously operating, wide field-of-view observatory situated near Puebla, Mexico that observes 0.5–100 TeV gamma rays. It is 15 times more sensitive than previous generation Extensive Air Shower gamma-ray instruments and is able to detect the Crab...
Prof.
INA SARCEVIC
(UNIVERSITY OF ARIZONA)
31/07/2017, 11:05
Cosmology and Astrophysics
Presentation
The IceCube detection of High Energy Starting Events (HESE) and
the upward muon track events (6 year data) are presently hard to
explain with the single power-law astophysical flux for
energies above 30TeV. We investigate the possibility that a
significant component of the additional neutrino flux originates
due to the decay of a very heavy dark matter particle via several
possible...
Alex Drlica-Wagner
(Fermilab)
31/07/2017, 11:25
Cosmology and Astrophysics
Presentation
Milky Way satellite dwarf galaxies are some of the oldest, smallest, and most dark matter dominated galaxies in the known universe. The study of these tiny dwarf galaxies can help shed light on the nature of dark matter and the mysteries of galaxy formation. Over the last two years, efforts using the Dark Energy Camera (DECam) have nearly doubled the known population of Milky Way satellite...
Ting Li
(Fermilab)
31/07/2017, 11:45
Cosmology and Astrophysics
Presentation
The census of Milky Way satellite galaxies provides crucial tests of both galaxy formation models and the broader Cold Dark Matter paradigm. A total of 27 new Milky Way satellite candidates have been discovered in the last two years, primarily in data from the Dark Energy Survey. These discoveries may represent a 100% increase in the number of known Milky Way satellite galaxies, leading a huge...
Antonella Palmese
(Fermilab/UCL)
31/07/2017, 12:00
Cosmology and Astrophysics
Presentation
Clusters of galaxies represent a powerful probe for cosmology in the era of large photometric surveys such as the Dark Energy Survey. At the same time, understanding the astrophysical processes that drive their evolution is needed for a correct cosmology: cluster galaxies show particular properties with respect to field galaxies, processes like cluster membership selection often require...
Dr
Yuanyuan Zhang
(Fermilab)
01/08/2017, 10:45
Cosmology and Astrophysics
Presentation
Constraining LambdaCDM cosmology with galaxy cluster abundance is one of the fundamental goals for the Dark energy survey (DES). Based on observations collected in the first year, DES has identified many thousands of clusters out to redshift 1.0. Weak lensing and multi-wavelength studies with X-ray data and cosmic microwave background are performed to provide inputs to the cosmology constraint...
Dr
Lindsey Bleem
(Argonne National Laboratory)
01/08/2017, 11:05
Cosmology and Astrophysics
Presentation
The South Pole Telescope (SPT) is a 10-meter millimeter-wavelength telescope optimized for high resolution observations of the Cosmic Microwave Background (CMB). The SPT has been used to conduct several wide-area surveys: the 2500-square-degree SPT-SZ survey (completed in 2011) as well as two recently completed surveys conducted using the SPTpol receiver: the 500-square-degree SPTpol Survey...
Dr
Mathew Madhavacheril
(Princeton University)
01/08/2017, 11:25
Cosmology and Astrophysics
Presentation
Future high resolution CMB experiments will detect tens of thousands of galaxy clusters. The abundance of clusters as a function of mass and redshift allows us to map the growth of structure and consequently measure the sum of neutrino masses and constrain the nature of dark energy. Such measurements are currently limited by our ability to calibrate the masses of galaxy clusters. Planned CMB...
439.
Measuring the pairwise kinematic Sunyaev-Zel'dovich effect with the Atacama Cosmology Telescope
Ms
Eve Vavagiakis
(Cornell University)
01/08/2017, 11:45
Cosmology and Astrophysics
Presentation
We have made improved measurements of the kinematic Sunyaev-Zel’dovich (kSZ) effect using data from the Atacama Cosmology Telescope (ACT) and the Baryon Oscillation Spectroscopic Survey (BOSS). A map of the Cosmic Microwave Background (CMB) composed from two seasons of observations each by ACT and the Atacama Cosmology Telescope Polarimeter (ACTPol) receiver was used. The mean pairwise baryon...
Dr
Kimmy Wu
(UC Berkeley)
01/08/2017, 12:00
Cosmology and Astrophysics
Presentation
A promising signature of cosmic inflation is the presence of a "B-mode" component in the polarization of the Cosmic Microwave Background (CMB) induced by primordial gravitational waves. For many inflation models, this B-mode signal is predicted to be at a level detectable in the near future. However, current searches are limited by a "lensing B-mode" component that is produced by...
Zeeshan Ahmed
(SLAC National Accelerator Laboratory)
01/08/2017, 13:30
Cosmology and Astrophysics
Presentation
The BICEP/Keck Array program comprises a series of telescopes at the South Pole designed to make deep measurements of cosmic microwave background polarization at degree angular scales on a 1% patch of sky. This talk will describe the latest science results from the program, including constraints on inflation, axion-like particles and primordial magnetic fields, as well as a high-significance...
Dr
Jeff McMahon
(University of Michigan)
01/08/2017, 13:50
Cosmology and Astrophysics
Presentation
ACTPol and Advanced ACTPol are a series of cameras deployed on the Atacama Cosmology Telescope (ACT) and used to map the temperature and polarization of the cosmic microwave background (CMB) in multiple frequency bands and with arc minute resolution. Survey operations began in 2013 with a sky coverage of hundreds of square degrees in the 150 GHz band. Over the past five years we have...
Dr
Amy Bender
(Argonne National Laboratory)
01/08/2017, 14:10
Cosmology and Astrophysics
Presentation
The South Pole Telescope is a millimeter-wavelength telescope dedicated to observations of the Cosmic Microwave Background (CMB). In late 2016, the telescope was upgraded with new receiver known as SPT-3G. The SPT-3G receiver contains a focal plane of approximately 16,000 polarization-sensitive superconducting detectors distributed between three frequency bands. SPT-3G will survey the...
Dr
Darcy Barron
(UC Berkeley / LBNL)
01/08/2017, 14:30
Cosmology and Astrophysics
Presentation
POLARBEAR is a cosmic microwave background (CMB) polarization experiment located in the Atacama desert in Chile. The science goals of the POLARBEAR project are to do a deep search for CMB B-mode polarization created by inflationary gravitational waves, as well as characterize the CMB B-mode signal from gravitational lensing.
Gravitational lensing of large-scale structure creates B-mode...
Prof.
Adrian Lee
(University of California, Berkeley)
01/08/2017, 14:50
Cosmology and Astrophysics
Presentation
The Simons Observatory (SO) is a next generation observatory optimized to make precise measurements of the comic microwave background (CMB) over frequencies spanning 30-300 GHz. The observatory will be built with a combination of 6 meter class and 1 meter class telescopes and up to 40,000 detector focal-plane arrays to make high fidelity maps over degree to arc-minute angular scales. These...