8 papers · 1 filter
Cosmography with DESI-DR1 Cosmic Chronometers: Direct H(z) measurements from Luminous Red Galaxy ages
Carlos A. Álvarez, Marcos M. Cueli, Balakrishna S. Haridasu +6
Providing robust redshift estimates for almost 3 million luminous red galaxies (LRGs), the Dark Energy Spectroscopic Instrument (DESI) offers a unique opportunity to test the expan…
Semi-empirical Framework of Supermassive Black Hole Evolution: Highlighting a possible tension between Demographics and Gravitational Wave Background
Andrea Lapi, Francesco Shankar, Michele Bosi +4
The evolution of the supermassive Black Hole (BH) population across cosmic times remains a central unresolved issue in modern astrophysics, due to the many noticeable uncertainties…
Cosmic magnification on high-redshift submillimeter galaxies
Marcos M. Cueli, JoaquÃn González-Nuevo, Laura Bonavera +1
Weak lensing magnification probes the correlation between galaxies and the underlying matter field in a similar fashion to galaxy-galaxy lensing shear. Although it has long been si…
Cosmography via stellar archaeology of low-redshift early-type galaxies from SDSS
Carlos A. Ãlvarez, Marcos M. Cueli, Alessandro Bressan +5
Cosmic chronometers offer a model-independent way to trace the expansion history of the Universe via the dating of passively evolving objects. This enables testing the validity of…
Outer regions of galaxy clusters as a new probe to test modifications to gravity
Minahil Adil Butt, Sandeep Haridasu, Antonaldo Diaferio +4
We apply the caustic technique to samples of galaxy clusters stacked in redshift space to estimate the gravitational potential in the cluster's outer region and test modifications…
Little ado about everything II: an `emergent' dark energy from structure formation to rule cosmic tensions
Andrea Lapi, Balakrishna S. Haridasu, Lumen Boco +3
[abridged] The CDM framework is a new cosmological model aimed to cure some drawbacks of the standard CDM scenario, such as the origin of the accelerated expansion at late…