02/03/2018 - 02/03/2018
ICCUB SEMINAR – Connecting Type Ia supernovae with the metallicity of their progenitors
DAM seminar room (724), 7th floor
Thermonuclear explosions of carbon-oxygen white dwarfs (CO WDs), or Type Ia supernovae (SNIa) are important tools for cosmology. SNIa observations show the recent acceleration and previous deceleration of the expansion rate of the Universe, in agreement with a 70% of the energy-matter content of the Universe in form of dark energy.
01/03/2018 - 01/03/2018
ICCUB SEMINAR – Finding the double sunsets: close binary stars, large spectroscopic surveys
DAM seminar room (724), 7th floor
I will discuss our present knowledge of the statistics of stellar multiplicity (the multiplicity fraction and the distribution of periods, mass ratios, and eccentricities), and the implications for stellar evolution, in particular for Type Ia Supernovae (SN Ia).
27/02/2018 - 27/02/2018
ICCUB SEMINAR – Trusting Theory in Cosmological Tests of Gravity
DAM seminar room (724), 7th floor
Modifications to gravity can provide attractive alternatives to the dark components of the standard model of cosmology. These modifications to general relativity (GR) must be hidden at small scales where theory is well tested, and so one naturally looks to the large scales in order to detect any deviations from GR.
21/02/2018 - 21/02/2018
ICCUB SEMINAR – Radiative Transfer Modeling of Lyman-Alpha Emitters as a Probe of Reionization
DAM seminar room (724), 7th floor
Reionization is the last major phase transition in the Universe during which the Intergalactic medium (IGM) changed from a fully neutral to highly ionized state. As Lyman-alpha emission from star-forming galaxies is sensitive to the neutral gas environment, Lyman-alpha emitters (LAEs) are among the few observational probes to the reionization process.
19/02/2018 - 19/02/2018
ICCUB SEMINAR – Probing the Dark Universe with Gravitational Waves
DAM seminar room (724), 7th floor
Gravitational wave (GW) astronomy has came to revolutionize our understanding of astrophysics, cosmology and fundamental physics. GWs from binary black-hole (BH) mergers allow us to learn about the population of BHs, their origin and their role through the history of the universe. If these BHs have a primordial origin and are abundant enough, they could comprise a large fraction of the Dark Matter (DM).
09/02/2018 - 09/02/2018
ICCUB SEMINAR – A review of the Fermi-LAT GeV Excess in light of its likely Stellar Origin
DAM seminar room (724), 7th floor
The Fermi-LAT has detected an anomalous signal at energies of a few GeV from the Galactic Center, the so called Galactic-Center Excess (GCE). The morphology of the GCE is roughly spherically symmetric. Dark matter has long been one of the leading interpretations of the excess, since the signal appears consistent with the expectation from a typical annihilating WIMP DM candidate.
30/01/2018 - 30/01/2018
ICCUB SEMINAR – Illuminating the faint Universe
DAM seminar room (724), 7th floor
Only once in a generation is there the opportunity to reveal the basic properties of a new galaxy type for the first time. With the advent of more sensitive instruments in the current large telescopes, an entirely new universe is being revealed, as it had never been seen before.
15/01/2018 - 29/01/2018
ICCUB COURSE – Course on “Scientific Philosophy”
Sala de Graus (aulari). Facultat de Física
The course addresses the fundamental problems of scientific philosophy, that is, philosophy inspired by science. The approach is not historical but based on concrete problems and proposals for solutions to them.
11/12/2017 - 15/12/2017
ICCUB COURSE – Course on “Numerical Relativity”
Room 507 (Pere Pascual), 5th floor
Topics Covered, Preliminary Course Outline:
23/11/2017 - 23/11/2017
ICCUB SEMINAR – New candidate RR Lyrae star streams in the inner Galaxy
Room 507 (Pere Pascual), 5th floor
In this talk we will present our findings of fourteen new candidate RR Lyrae stellar streams in the inner galaxy (4
20/11/2017 - 22/11/2017
ICCUB COURSE – An introduction to Bayesian Statistics through Astronomical Application
V12M (Facultat de Física)
The goal of this course is to provide undergraduate and masters students a first contact with Bayesian Inference. We will introduce basic probability concepts emphasizing the interpretation of probability in the Bayesian framework.
16/11/2017 - 16/11/2017
ICCUB SEMINAR – Lensing convergence in galaxy clustering in LCDM and beyondd
DAM Seminar Room, 7th floor
We study the impact of neglecting lensing magnification in galaxy clustering analyses for future galaxy surveys, considering the ΛCDM model and two extensions: massive neutrinos and modifications of General Relativity. Our study focuses on the biases on the constraints and on the estimation of the cosmological parameters.
30/10/2017 - 30/10/2017
ICCUB SEMINAR – Predicting the radiative display of Type Ia Supernovae: The case for multiple progenitor channels
Room 507 (Pere Pascual), 5th floor
Type Ia supernovae (SNe Ia) are amongst the most energetic stellar explosions. With typical luminosities several billion times that of the Sun, SNe Ia are visible across a large fraction of the observable universe, and enabled the discovery of its accelerated expansion.
27/10/2017 - 27/10/2017
ICCUB SEMINAR – Self-consistent models of our Galaxy in the Gaia era
DAM seminar room (724), 7th floor
I present an approach for constructing self-consistent dynamical models of our Galaxy based on distribution functions (DF) in the action space. The parameters of the DF are adjusted to match observed rotation curve and distribution of stars in the Solar neighborhood, and the gravitational potential is computed from the DF iteratively.
24/10/2017 - 26/10/2017
Room V12M / Room 505
Lectures: Tuesday 24th and Wednesday 25th October, 17:40-19:00 (Room V12M) Lecture 1: Astrophysical introduction to gravitational dynamics. Basic concepts: mean-field regime, two-body relaxation, collective effects, secular evolution. Physical regimes: collisional vs. Collisionless. Overview of gravitational N-body problem, computational challenges. Astrophysical contexts: planetary systems, star clusters, galactic dynamics, cosmological structure formation.
Generalitat de CatalunyaUniversitat de BarcelonaUniversitat Autònoma de BarcelonaUniversitat Politècnica de CatalunyaConsejo Superior de Investigaciones CientíficasCentres de Recerca de Catalunya