Seminars
 
UB
21/10/2019 - 00/00/0000
Inferring the dynamical growth of structures at high-redshift
Seminar DAM (742, ICCUB building, UB Campus)
While the standard model of cosmology fits most cosmological observations to extraordinary accuracy, some tensions between the model and observations seem to persist despite the increasing quality of data.
CSIC
18/10/2019 - 00/00/0000
Tension on the Hubble constant: systematic uncertainties or new physics?
Sala Alberto Lobo (ICE building, UAB Campus)
With the recent increase in precision of our cosmological datasets, measurements of ΛCDM model parameter provided by high- and low-redshift observations started to be in tension.
UB
16/10/2019 - 00/00/0000
Weak lensing with uncertain redshifts
Seminari DAM (724, ICCUB building, UB Campus)
The cosmological conclusions of weak lensing surveys are very sensitive to the assumed redshift distributions of sources placed in different tomographic bins. In reality, these distributions are not known quantities, so from a Bayesian perspective, they should be treated as random objects, constrained by data.
UB
15/10/2019 - 00/00/0000
The (endless) quest for obscured AGN
Seminari DAM (724, ICCUB building, UB Campus)
In the last twenty years, X-ray surveys have revealed that a significant fraction of accretion through cosmic time is obscured. In this talk I will highlight some recent results obtained by combining the strength of deep X-ray observations (as those in the Chandra Deep Field North and South, and COSMOS) with optical/mid-IR information.
CSIC
11/10/2019 - 00/00/0000
Stellar Population of galaxies and their evolution
Sala Alberto Lobo (ICE building, UAB Campus)
In this talk, I will present my research trajectory to the ICE. I will review some of the main observed galaxy properties and relations and how they change across cosmic time.
CSIC
07/10/2019 - 00/00/0000
Inflationary universe in F(R) gravity with antisymmetric tensor fields and their suppression during its evolution
Sala Alberto Lobo (ICE building, UAB Campus)
The intriguing question, why the present scale of the universe is free from any perceptible footprints of rank-2 antisymmetric tensor fields (generally known as Kalb-Ramond fields), is addressed. A quite natural explanation of this issue is given from the angle of higher-curvature gravity, both in four- and five-dimensional spacetime.
CSIC
07/10/2019 - 00/00/0000
Dark Matter and Dark Energy from a New Nonlocal Modified Gravity
Sala Alberto Lobo (ICE building, UAB Campus)
I will present some exact cosmological solutions for modified gravity based on a nonlocal operator acting between two factors of the square root of R – 2 Lambda.
CSIC
04/10/2019 - 00/00/0000
Rapidly Evolving Episodic Outflow in the Fastest Water Fountain
Sala Alberto Lobo (ICE building, UAB Campus)
Water fountains (WF) are evolved stars showing early stages of collimated mass-loss during transition from the asymptotic giant branch, providing valuable insight into the formation of asymmetric planetary nebulae. 
UB
26/09/2019 - 00/00/0000
Flavoured axion-like particles
Seminari Pere Pascual (ICCUB building, UB Campus)
Pseudo Nambu-Goldstone bosons (also known as axion-like particles) with flavour-violating couplings to the Standard Model (SM) fermions are a generic consequence of spontaneously-broken global U(1) symmetries, if the SM fermions carry flavour non-universal charges.
CSIC
25/09/2019 - 00/00/0000
The first image of a black hole
Sala Alberto Lobo (ICE building, UAB Campus)
I will briefly discuss how the first image of a black hole was obtained by the EHT collaboration. In particular, I will describe the theoretical aspects that have allowed us to model the dynamics of the plasma accreting onto the black hole and how such dynamics was used to generate synthetic black-hole images.
UB
19/09/2019 - 00/00/0000
Spin of primordial black holes
Aula 507 (Pere Pascual, ICCUB building, UB Campus)
We discuss the spin of primordial black holes (PBH) formed during radiation domination under the assumption of Gaussian statistics. They are formed by the collapse of rare fluctuations.
CSIC
13/09/2019 - 00/00/0000
Studying the Expansion of the Universe with quasar spectra
Sala Alberto Lobo (ICE building, UAB Campus)
From 2009 to 2014, the Baryon Oscillation Spectroscopic Survey (BOSS) used the SDSS telescope to obtain spectra of 1.5 million galaxies to get very accurate measurements of the Baryon Acoustic Oscillations (BAO) scale at redshift z ~0.5.
UB
13/09/2019 - 00/00/0000
Higher spin motivated theories (of gravity)
Aula 507 (Pere Pascual, ICCUB building, UB Campus)
Despite the continuing efforts, we cannot be truly satisfied with our understanding of the physics in the UV (short distance) limit. The manifestation is that there is no broadly accepted model of quantum gravity.
CSIC
12/07/2019 - 00/00/0000
The 1908 Tunguska Event: 111 years after, it still makes you think
Sala Alberto Lobo (ICE building, UAB Campus)
On June 30th, 1908, an explosion flattened more than two thousands square kilometres of Siberian taigà. During the following 111 years, several theories were proposed to explain the observed features.
UB
04/07/2019 - 00/00/0000
Search optimization and Dynamical Criticality on the String Landscape
Aula 507 (Pere Pascual, ICCUB building, UB Campus)
A striking feature of our universe is its near criticality. The cosmological constant and weak hierarchy problems, as well as the metastability of the electroweak vacuum, can all be understood as problems of criticality. This suggests a statistical physics approach, based on the landscape of string theory.
Generalitat de CatalunyaUniversitat de BarcelonaUniversitat Autònoma de BarcelonaUniversitat Politècnica de CatalunyaConsejo Superior de Investigaciones CientíficasCentres de Recerca de Catalunya