Narayan Khadka
Kansas State University
15 Papers
6 Citations
Narayan Khadka is an academic researcher from Kansas State University. The author has contributed to research in topics: Redshift & Hubble's law. The author has an hindex of 5, co-authored 10 publications.
Chat about Author
Papers
Using quasar X-ray and UV flux measurements to constrain cosmological model parameters
Narayan Khadka,Bharat Ratra +1 more
TL;DR: In this article, the authors used X-ray and UV flux measurements of 1598 quasars (QSOs) in the redshift range 0.036 ≤ z ≤ 5.1003, part of which, z ∼ 2.4−−−5.1, is largely cosmologically unprobed.
102
Quasar X-ray and UV flux, baryon acoustic oscillation, and Hubble parameter measurement constraints on cosmological model parameters
Narayan Khadka,Bharat Ratra +1 more
TL;DR: In this paper, the Risaliti & Lusso (2015) compilation of 808 X-ray and UV flux measurements of quasars (QSOs) in the redshift range $0.061 \leq z \LEq 6.28$ alone and in conjuction with baryon acoustic oscillation (BAO) and Hubble parameter [$H(z)$] measurements, to constrain cosmological parameters in six cosmology models.
91
Determining the range of validity of quasar X-ray and UV flux measurements for constraining cosmological model parameters
Narayan Khadka,Bharat Ratra +1 more
TL;DR: In this paper, the authors used six different cosmological models to study the recently released compilation of X-ray and UV flux measurements of 2038 quasars (QSOs) which span the redshift range $0.009 \leq z \ ≤ 1.5-1.7.
82
Constraints on cosmological parameters from gamma-ray burst peak photon energy and bolometric fluence measurements and other data
Narayan Khadka,Bharat Ratra +1 more
TL;DR: In this paper, the peak photon energy and bolometric fluence of 119 gamma-ray bursts (GRBs) extending over the redshift range of $0.3399 \leq z \LEq 8.2$ to simultaneously determine cosmological and Amati relation parameters.
71
Do gamma-ray burst measurements provide a useful test of cosmological models?
Narayan Khadka,Orlando Luongo,Orlando Luongo,Orlando Luongo,Marco Muccino,Marco Muccino,Bharat Ratra +6 more
TL;DR: In this article, the authors study eight different gamma-ray burst (GRB) data sets to examine whether current GRB measurements can be used to reliably constrain cosmological model parameters.
69