Quasars as standard candles. I. The physical relation between disc and coronal emission
Sign Up to like & getrecommendations! Published in 2017 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201630079
Abstract: Context. A tight non-linear relation exists between the X-ray and UV emission in quasars (i.e. LX ∝LUVγ), with a dispersion of ~0.2 dex over approximately three orders of magnitude in luminosity. Such observational evidence has… read more here.
Keywords: accretion disc; relation; standard candles; emission ... See more keywords
Testing the cosmic curvature at high redshifts: the combination of LSST strong lensing systems and quasars as new standard candles
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa1539
Abstract: The cosmic curvature, a fundamental parameter for cosmology could hold deep clues to inflation and cosmic origins. We propose an improved model-independent method to constrain the cosmic curvature by combining the constructed Hubble diagram of… read more here.
Keywords: strong lensing; standard candles; model; lensing systems ... See more keywords