Events Calendar

 November 2023        
MondayTuesdayWednesdayThursdayFriday
30
Rashid Sunyaev, X-Ray and microwave cosmology: synergy and competition. What do we expect from the next generation X-ray and microwave telescopes? (11:00 AM - 12:15 PM)

-- Abstract: Our Universe is filled with cosmic microwave background radiation (CMB) which is isotropic and has the black body spectrum with temperature 2.7 Kelvin. No spectral deviations from a black body have been detected in the CMB monopole until now. However, the physics of the interaction of CMB photons with hot electrons predicted the presence of "shadows" in the angular distribution of CMB in the directions where clouds of very hot electrons Te~106-108 K exist in our Universe. Today we know that such objects exist and they are clusters of galaxies containing thousands of galaxies each, a lot of dark matter, and hot gas filling the huge potential well. The "shadows" with very peculiar frequency spectrum arise due to the Thomson scattering interaction of the CMB photons with the hot electrons. Today this method has permitted us to discover more than 8 thousand of clusters and even a protocluster of galaxies at relatively high redshifts 0 < z < 2. Behind many newly discovered rich clusters of galaxies, we see the extremely distant galaxies with their shapes distorted and brightness increased due to gravitational lensing by the huge gravitational potential of the invisible "dark matter" present in a cluster The amplitude of the CMB brightness shadow corresponds only to a few tens to hundreds of microKelvin. There is another way to observe the same hot gas. On June 13th of 2019, Russia launched the SRG spacecraft with Russian ART-XC and German eRosita X-Ray telescopes aboard into the second Lagrangian Point of the Sun-Earth system. These telescopes are sensitive correspondingly to the hard and soft X-Ray photons. eRosita created the best map of the entire sky in X-Rays and was expected to discover more than 100,000 clusters of galaxies (i.e. all rich clusters of galaxies in the observable Universe) during the 4 years of surveying the full sky. At the same time, ground-based millimeter wavelength telescopes on the South Pole of the Earth and in the Atacama desert at 5 km altitude, equipped with tens of thousands of cryogenic bolometers in their focal planes, promise to detect the majority of these clusters due to their "shadows" in the CMB. These two data sets will be very complimentary and there will be a lot of synergy. At the same time, there is competition: who will be the first to discover the most interesting (massive, high z, etc) clusters of galaxies? Ensemble of 105 clusters, their distribution in space, mass, and redshift will provide a unique sample of data for testing cosmological models. The interaction of CMB photons with free electrons opens a unique way to measure the peculiar velocity of a cluster of galaxies relative to the unique system of coordinates in which the CMB is isotropic. Observers dream to measure peculiar velocities and even bulk and turbulent velocities inside the clusters of galaxies at any distance from us because both SZ effects (thermal and kinematic) do not depend on the redshift of the object. I will try to present the results of a search for the clusters obtained by eRosita and ground-based SPT and ACT microwave telescopes

Soubhik Kumar, Gravitational Waves as Probes of Small-scale Primordial Fluctuations (12:30 PM - 1:30 PM)

Ameen Ismail, Relevant dilaton stabilization (2:00 PM - 3:00 PM)

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Shahrzad Zare, How generalized symmetry provides us with an explanation for the monopole scattering problem (2:00 PM - 3:50 PM)

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31
, Confining Strings Workshop (9:00 AM - 6:00 PM)

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Rashid Sunyaev, SRG/eRosita: An all-sky X-ray map, showing tens of thousands of galaxy clusters, 100 tidal disruption events and the variability of millions of quasars, AGNs and flaring stars (2:00 PM - 3:15 PM)

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Ahmed Almheiri, Exposing the Secrets of Black Holes (4:30 PM - 6:00 PM)

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1
, Confining Strings Workshop (9:00 AM - 6:00 PM)

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David Gross, Fifty Years of Quantum Chromodynamics (The Theory of The Strong Nuclear Force) (2:00 PM - 3:30 PM)

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, CCPP Pheno Journal Club (3:30 PM - 4:30 PM)

2
3
Popov, Postdoc HepTh Discussion Group (12:00 PM - 1:30 PM)

Alexandra Zidovska, Undergrad Research Fair (12:15 PM - 2:15 PM)

Thibault Damour, Black Hole Binary Dynamics from Classical and Quantum Gravitational Scattering (2:30 PM - 3:45 PM)

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6
Simon Lin, Operator algebras in high energy physics (12:30 PM - 1:30 PM)

Zare (2:00 PM - 4:00 PM)

7
Katie Harrington, Pre-deployment Optical Testing for the Simons Observatory (2:00 PM - 3:15 PM)

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8
Andy Haas et al., Ptolemy Experiment / BBn neutrinos (10:30 AM - 12:30 PM)

Riccardo Rattazzi, Softening the UV without new particles (2:00 PM - 3:15 PM)

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, CCPP Pheno Journal Club (3:30 PM - 4:30 PM)

Patrick Breysse (8:00 PM - 9:30 PM)

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9
Naomi Ginsberg, Following and Controlling Formation and Function of Bottom-up Assembled Nanomaterials (4:00 PM - 5:30 PM)

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10
, Memorial Service for Prof. Emeritus Ed Robinson (9:00 AM - 5:00 PM)

Popov, Postdoc HepTh Discussion Group (12:00 PM - 1:30 PM)

13
Shirley Ho, Foundation Models for Science (12:30 PM - 1:30 PM)

Zare (2:00 PM - 4:00 PM)

Chi-Ming Chang, Black hole microstates in AdS (2:00 PM - 3:15 PM)

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14
, Global Categorical Symmetries Workshop (8:00 AM - 6:00 PM)

Aaron Yung, Challenges and first results on modeling halos and galaxies in the ultra-high-redshift universe (2:00 PM - 3:15 PM)

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15
, Global Categorical Symmetries Workshop (8:00 AM - 6:00 PM)

, No HEP Seminar (2:00 PM - 3:15 PM)

16
Zeba Wunderlich, Noise and Competition: Mechanisms of Gene Expression Control in the Early Embryo (4:00 PM - 5:30 PM)

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17
Popov, Postdoc HepTh Discussion Group (12:00 PM - 1:30 PM)

Xinyi Chen, Probing primordial non-Gaussianity by reconstructing the initial conditions with machine learning (12:00 PM - 12:30 PM)

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20
Patrick Rieck, A perspective on the future of experimental particle physics (12:30 PM - 1:30 PM)

Zare (2:00 PM - 4:00 PM)

21
22
, No Classes; University closes @ 4pm

, CCPP Pheno Journal Club (3:30 PM - 4:30 PM)

23
, University Closed

24
, University Closed

Popov, Postdoc HepTh Discussion Group (12:00 PM - 1:30 PM)

27
(12:30 PM - 1:30 PM)

Zare (2:00 PM - 4:00 PM)

28
Burçin Mutlu-Pakdil, The Smallest and Faintest Galaxies: Clues to the Nature of Dark Matter and Galaxy Formation (2:00 PM - 3:15 PM)

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29
Asimina Arvanitaki, The Cosmic Neutrino Background (CνB): Its distribution on the surface of the Earth and its manipulation on laboratory scales (2:00 PM - 3:15 PM)

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30
Chiara Mingarelli, The NANOGrav Experiment: Current Results and Future Directions (3:00 PM - 4:30 PM)

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1
Popov, Postdoc HepTh Discussion Group (12:00 PM - 1:30 PM)

James Sullivan, Galaxies Remember Inflation - New Aspects of Local Primordial non-Gaussianity in Galaxy Surveys (12:00 PM - 12:30 PM)

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