Advanced search

Filter By:

Journal Check one or more journals to show results from those journals only.

Choose more journals

Article type Check one or more article types to show results from those article types only.
Subject Check one or more subjects to show results from those subjects only.
Date Choose a date option to show results from those dates only.

Custom date range

Clear all filters
Sort by:
Showing 1–7 of 7 results
Advanced filters: Author: Levon Pogosian Clear advanced filters

  • A simultaneous reconstruction of three functions describing the expansion of the Universe and gravitational effects on light and matter shows the extent to which modified gravity can address tensions between the standard cosmological model and a large body of observations.

    • Levon Pogosian
    • Marco Raveri
    • Alex Zucca
    Research
    Nature Astronomy
    Volume: 6, P: 1484-1490

  • Our current cosmological observations cannot distinguish between a cosmological model with a fifth force acting on dark matter and one for which the laws of gravity are modified. Instead, a method using future gravitational redshift data is proposed.

    • Camille Bonvin
    • Levon Pogosian
    Research
    Nature Astronomy
    Volume: 7, P: 1127-1134

  • Recent observations reveal tension between various cosmological probes. Assuming dark energy to be non-constant, depending on redshift, may relieve this tension. The Dark Energy Spectroscopic Instrument survey will be able to confirm this result.

    • Gong-Bo Zhao
    • Marco Raveri
    • Hanyu Zhang
    Research
    Nature Astronomy
    Volume: 1, P: 627-632

  • It is generally accepted that the Universe is dominated by dark energy but the different methods to measure the Hubble constant disagree, giving origin to what is known as the "Hubble tension”. The authors demonstrate that the sole reduction of the sound horizon is not sufficient to fully resolve the Hubble tension.

    • Karsten Jedamzik
    • Levon Pogosian
    • Gong-Bo Zhao
    ResearchOpen Access
    Communications Physics
    Volume: 4, P: 1-6