ICTP - Seminars

Seminars

Details about upcoming HECAP seminars

High Energy seminars are usually held on Tuesdays at 14:30 p.m. in the Luigi Stasi Seminar Room (1st floor) and on Thursdays at 14:30 p.m. in the Euler Lecture Hall (Lower level '0').

Informal seminars may also take place on Mondays and Fridays in the Euler Lecture Hall.

String Seminars in Trieste is a monthly activity organized jointly by the High Energy Physics groups of ICTP and SISSA. Each event consists of two seminars given by two external speakers. The aim is to gather all theoretical physicists working in string theory and related topics in the Trieste area, and have the opportunity to get updated on what's going on in our field world-wide. The seminars take place either at ICTP or SISSA, alternately. Link to the Webpage for more information and future activities.

All seminars are announced on the High Energy board (2nd floor, near the High Energy Secretariat).

Also check the announcements on ICTP notice boards regularly.

ICTP is also happy to share information about activities hosted by its joint institute with Trieste science centres, the Institute for Fundamental Physics of the Universe (IFPU). IFPU Colloquia are seminars intended for a broad audience on topics related to the IFPU research lines. The venue for IFPU Colloquia is Lecture Hall D, in the basement of the former SISSA Main Bldg. Please check here for more information on all activities taking place at IFPU.

The mail list for our ICTP seminars is he-sem@lists.ictp.it

If you are not subscribed and wish to receive the information, please use the following link: https://lists.ictp.it/mailman/listinfo/he-sem

If you are interested in subscribing to the SISSA mailing lists, you should follow the instructions on the high-energy mailing list seminars or all the mailing lists.

Showing 10 records

Europe/Rome Abstract. Clusters of galaxies are the most massive gravitationally bound objects in the Universe. While most of their mass is Dark Matter, the primary component of their visible matter is hot X-ray gas. A significant fraction of clusters are still growing through the infall of groups of galaxies or through the mergers of clusters. These cluster mergers are the most energetic events in the present Universe, after the Big Bang, releasing energies up to 10^64 ergs. Cluster mergers leave distinct signatures on the intracluster medium in the form of shocked gas and diffuse radio sources, relics. Most of the gravitational energy released during the merger is converted into shocks and gas turbulence in the cluster gas. This talk will highlight Chandra X-ray and radio results on the HST Frontier Fields clusters MACSJ017.5+3745, MACSJ1149.6+2223, and A2744, which are undergoing major mergers. Recent results on the merger of the A3411 and A3412 clusters show strong evidence for the electron re-acceleration at the merger site. Finally this talk will highlight results from the HST RELICS (Reionization Lensing Cluster Survey) which has led to the detection of very high redshift (z~10) galaxies which are strongly lensed by foreground clusters. ICTP ICTP pio@ictp.it

Seminar

24 Sep 2019

@ ICTP

High Energy Cosmology and Astroparticle Physics

IFPU Colloquium: Chandra, HST, and Radio Observations of Clusters of Galaxies

Room: Leonardo Building - Euler Lecture Hall

Speaker(s): Christine JONES FORMAN (Harvard, CfA)

Seminar Start Time: 14:30

Europe/Rome Abstract. Supermassive black holes (SMBHs) play key roles in galaxy and cluster evolution. This is most clearly seen in the “fossil record” that is imprinted in the gas rich atmospheres of early type galaxies, groups, and clusters by powerful SMBH outbursts. I will discuss the outburst history of M87 as chronicled in its radio and X-ray images and the implications of these outbursts for heating gas rich environments. Based on a simple shock model of M87’s 12 Myr old outburst, I will present the properties of the outburst including its age, total energy, and duration. In addition to discussing the outburst around M87, I will review the results of a galaxy survey that shows the effects of SMBH feedback on early type galaxies and has interesting implications for the growth of SMBHs over cosmic time. I conclude by describing a future X-ray mission, Lynx, whose sub-arcsecond angular resolution would allow us to study the evolution of SMBHs and hot, X-ray emitting atmospheres from high redshifts to the present. ICTP ICTP pio@ictp.it

Seminar

24 Sep 2019

@ ICTP

High Energy Cosmology and Astroparticle Physics

IFPU Colloquium: Supermassive Black Holes (SMBH) at Work: The Effects of SMBH Outbursts on theEvolution of Gas Rich Galaxies, Groups, and Galaxy Clusters

Room: Leonardo Building - Euler Lecture Hall

Speaker(s): William FORMAN (Harvard, CfA)

Seminar Start Time: 16:00

Europe/Rome Abstract. In recent years we explored the understanding of the soft factorization property of the S-matrix for a theory containing massless particles(photon/graviton) when the energy of external massless particles are small (soft particles). Though the leading factorization is discovered long ago (1965) by Weinberg, it's understanding in the subleading order (for all loop order in S-matrix) was not much explored prior to our (with Sen) work due to the infrared divergence of S-matrix in D=4. For loop corrected S-matrix, we found that the subleading soft factorization contains terms logarithmic in soft energy. The classical limit of this logarithmic terms in soft graviton theorem provides a new classical tail memory with the known permanent shift between the mirrors of gravitational wave detector. Currently, we are trying to understand whether this soft expansion can be understood as the Ward identity of any asymptotic symmetry. ICTP ICTP pio@ictp.it

Seminar

26 Sep 2019

@ ICTP

Strings and Higher Dimensional Theories

Status of Soft Theorem in D=4 (Its classical limit and understanding as Ward identity)

Room: Leonardo Building - Euler Lecture Hall

Speaker(s): Biswajit SAHOO (Harish Chandra Research Institute, Allahabad, India)

--- Please note change in date and venue!! ---

Seminar Start Time: 14:30

Europe/Rome Abstract. One of the main challenges in cosmology is to characterise the physics of inflation. While a single weakly-coupled scalar field rolling down a very flat potential satisfies the basic requirements that observations impose on an inflationary scenario, a great number of phenomena that could take place during inflation are still unconstrained by data. Primordial features are one example of this phenomena and a well-motivated proof of the early universe in their own right. In this talk, we demonstrate that features in primordial spectra, much like the standard BAO themselves, are immune to the most basic nonlinear processes of the late universe and can be tested with the full statistical power of LSS surveys. We perform a full fledged analysis of the BOSS survey data and put constraints on linearly and logarithmically spaced primordial oscillations which are competitive with the ones obtained from CMB observations. Furthermore, we provide an extensive forecast of future surveys, such as EUCLID, DESI and SPHEREx, showing that the future of constraining primordial features is indeed in LSS observations. ICTP ICTP pio@ictp.it

Seminar

1 Oct 2019

@ ICTP

Cosmology

Primordial Features in the BAO spectrum

Room: Leonardo Building - Luigi Stasi Seminar Room

Speaker(s): Matteo BIAGETTI (University of Amsterdam, The Netherlands)

Seminar Start Time: 14:30

Europe/Rome Abstract. The conventional wisdom in cosmology is that that cold-dark-matter haloes form out of initial density peaks and continuously accrete matter from the surroundings becoming more and more massive with time. These concepts form the basis of several semi-analytical tools that are regularly used to interpret data from galaxy and cluster surveys and develop galaxy-formation models (e.g. for the halo mass function, merger trees, and galaxy biasing). Using a suite of numerical simulations, we present thorough tests of the established scenario and show that it is mandatory to introduce new elements in the theory of the gravitational collapse of cold matter. In particular, we demonstrate that filamentary structures in the cosmic web inhibit accretion of new matter onto collapsed haloes. We also illustrate how this phenomenon explains the origin of the so-called 'assembly bias' for galaxy-sized haloes and also influences the dynamics of satellite galaxies. ICTP ICTP pio@ictp.it

Seminar

2 Oct 2019

@ ICTP

High Energy Cosmology and Astroparticle Physics

IFPU Colloquium: Myth and truth about halo formation in CDM models

Room: Leonardo Building - Euler Lecture Hall

Speaker(s): Cristiano PORCIANI (Argelander Institut für Astronomie, Bonn)

Seminar Start Time: 14:30

Seminar

2 Oct 2019

@ ICTP

High Energy Cosmology and Astroparticle Physics

IFPU Colloquium: Title to be announced

Room: Leonardo Building - Euler Lecture Hall

Speaker(s): Vincent DESJACQUES (Technion, Haifa)

Seminar Start Time: 16:00

Seminar

8 Oct 2019

@ ICTP

Strings and Higher Dimensional Theories

Title to be announced

Room: Leonardo Building - Luigi Stasi Seminar Room

Speaker(s): Krishnan NARAYAN (Chennai Mathematical Institute, India)

Seminar Start Time: 14:30

Seminar

17 Oct 2019

@ ICTP

Strings and Higher Dimensional Theories

Title to be announced

Room: Leonardo Building - Luigi Stasi Seminar Room

Speaker(s): Marco SCALISI (University of Leuven, Belgium)

--- Please note unusual venue!! ---

Seminar Start Time: 14:30

Seminar

24 Oct 2019

@ ICTP

Strings and Higher Dimensional Theories

Title to be announced

Room: Leonardo Building - Luigi Stasi Seminar Room

Speaker(s): Adwait GAIKWAD (TIFR, Mumbai)

--- Please note unusual venue!! ---

Seminar Start Time: 14:30

Seminar

12 Nov 2019

@ ICTP

Strings and Higher Dimensional Theories

Title to be announced

Room: Leonardo Building - Luigi Stasi Seminar Room

Speaker(s): Pushkal SHRIVASTAVA (ICTS - TIFR, Bangalore, India)

Seminar Start Time: 14:30

ICTP - Strada Costiera, 11
I - 34151 Trieste Italy
(+39) 040 2240 111
pio@ictp.it

ICTP is governed by UNESCO, IAEA, and Italy, and is a UNESCO Category 1 Institute

HECAP

CMSP

MATH

ESP

AP

QLS

New Research Areas

HECAP

High Energy, Cosmology and Astroparticle Physics

Contextual Navigation

Seminars

Details about upcoming HECAP seminars

Seminar

High Energy Cosmology and Astroparticle Physics

IFPU Colloquium: Chandra, HST, and Radio Observations of Clusters of Galaxies

Seminar

High Energy Cosmology and Astroparticle Physics

IFPU Colloquium: Supermassive Black Holes (SMBH) at Work: The Effects of SMBH Outbursts on theEvolution of Gas Rich Galaxies, Groups, and Galaxy Clusters

Seminar

Strings and Higher Dimensional Theories

Status of Soft Theorem in D=4 (Its classical limit and understanding as Ward identity)

Seminar

Cosmology

Primordial Features in the BAO spectrum

Seminar

High Energy Cosmology and Astroparticle Physics

IFPU Colloquium: Myth and truth about halo formation in CDM models

Seminar

High Energy Cosmology and Astroparticle Physics

IFPU Colloquium: Title to be announced

Seminar

Strings and Higher Dimensional Theories

Title to be announced

Seminar

Strings and Higher Dimensional Theories

Title to be announced

Seminar

Strings and Higher Dimensional Theories

Title to be announced

Seminar

Strings and Higher Dimensional Theories

Title to be announced

CheckRedirectPage