Results 121 to 130 of about 6,292 (199)

Status Report on the Chicago-Carnegie Hubble Program (CCHP): Measurement of the Hubble Constant Using the Hubble and James Webb Space Telescopes

The Astrophysical Journal
We present the latest results from the Chicago-Carnegie Hubble Program to measure the Hubble constant, using data from the James Webb Space Telescope (JWST). The overall program aims to calibrate three independent methods: (1) tip of the red giant branch
Wendy L. Freedman, Barry F. Madore, Taylor J. Hoyt, In Sung Jang, Abigail J. Lee, Kayla A. Owens   +5 more
doaj   +1 more source

The redshift in Hubble's constant

, 1995
A generalisation to electrodynamics and Yang-Mills theory is presented that permits computation of the speed of light. The model presented herewithin indicates that the speed of light in vacuo is not a universal constant. This may be relevant to the current debate in astronomy over large values of the Hubble constant obtained through the use of the ...
openaire   +2 more sources

The TRGB−SBF Project. III. Refining the HST Surface Brightness Fluctuation Distance Scale Calibration with JWST

The Astrophysical Journal
The TRGB−SBF Project team is developing an independent distance ladder using a geometrical calibration of the tip of the red giant branch (TRGB) method in elliptical galaxies that can, in turn, be used to set the surface brightness fluctuation (SBF ...
Joseph B. Jensen, John P. Blakeslee, Michele Cantiello, Mikaela Cowles, Gagandeep S. Anand, R. Brent Tully, Ehsan Kourkchi, Gabriella Raimondo   +7 more
doaj   +1 more source

Tension in the Hubble constant

, 2017
There has been some hand-wringing of late about the tension between the value of the expansion rate of the universe – the famous Hubble constant, H ₀ , measured directly from observed redshifts and distances, and that obtained by multi-parameter fits to the cosmic microwave background.
openaire   +1 more source

Time-Delay Cosmography: Measuring the Hubble Constant and Other Cosmological Parameters with Strong Gravitational Lensing. [PDF]

Space Sci Rev
Birrer S, Millon M, Sluse D, Shajib AJ, Courbin F, Erickson S, Koopmans LVE, Suyu SH, Treu T.   +8 more
europepmc   +1 more source

Black hole information turbulence and the Hubble tension. [PDF]

Sci Rep
Cabrera Fernández JL.
europepmc   +1 more source

The Rényi Entropy and Entropic Cosmology. [PDF]

Entropy (Basel)
Kruglov SI.
europepmc   +1 more source

Using kilonovae as standard candles to measure the Hubble Constant

, 2019
The detection of GW170817 is revolutionizing many areas of astrophysics with the joint observation of gravitational waves and electromagnetic emissions. These multi-messenger events provide a new approach to determine the Hubble constant, thus, they are ...
Antier, Sarah, Foley, Ryan J., Christensen, Nelson, Coughlin, Michael W., Dietrich, Tim, Heinzel, Jack, Khetan, Nandita, Coulter, David A.   +7 more
core  

Two Dynamical Scenarios for Binned Master Sample Interpretation. [PDF]

Entropy (Basel)
Montani G, Fazzari E, Carlevaro N, Dainotti MG.   +3 more
europepmc   +1 more source

The quintom theory of dark energy after DESI DR2. [PDF]

Natl Sci Rev
Cai Y, Ren X, Qiu T, Li M, Zhang X.
europepmc   +1 more source