Results 131 to 140 of about 2,384 (215)

Calibration of the Barnes-Evans relation using interferometric observations of Cepheid variables [PDF]

, 2003
Direct diameter measurements of Cepheid variables are used to calibrate the Barnes-Evans Cepheid surface brightness relation. More than 50 separate Cepheid diameter measurements from four different optical interferometers are used to calculate surface ...
Nordgren, Tyler E., Lane, Benjamin F.
core  

Tip of the Red Giant Branch Distances with JWST. II. I-band Measurements in a Sample of Hosts of 10 Type Ia Supernova Match HST Cepheids

The Astrophysical Journal
The Hubble Tension, a >5 σ discrepancy between direct and indirect measurements of the Hubble constant ( H _0 ), has persisted for a decade and motivated intense scrutiny of the paths used to infer H _0 .
Siyang Li, Gagandeep S. Anand, Adam G. Riess, Stefano Casertano, Wenlong Yuan, Louise Breuval, Lucas M. Macri, Daniel Scolnic, Rachael Beaton, Richard I. Anderson   +9 more
doaj   +1 more source

THE LUMINOSITY SCALE OF CEPHEID VARIABLE STARS: A REVISION

, 1984
The period-luminosity-color relation for classical Cepheids is discussed in terms of a recent re-determinations of the distance moduli of open clusters with Cepheid members. The distance moduli of eight clusters with well established Cepheid members were
Schmidt, Edward G.
core  

Abundance effects on the Cepheid distance scale

The Astrophysical Journal, 1988
A new investigation of the dependence of the period-luminosity (PL) and period-luminosity-color (PLC) relations on the helium and metal abundances in classical Cepheids is presented. Composition dependences are assigned to all quantitites under study, so that the results represent a true theoretical prediction.
openaire   +1 more source

Testing the Cosmic Distance Duality Relation Using Strong Gravitational Lensing Time Delays and Type Ia Supernovae

The Astrophysical Journal
We present a comprehensive test of the cosmic distance duality relation (DDR) using a combination of strong gravitational lensing (SGL) time delay measurements and Type Ia supernovae (SNe Ia) data.
Jing-Zhao Qi, Yi-Fan Jiang, Wan-Ting Hou, Xin Zhang   +3 more
doaj   +1 more source

On Cepheid diameter and distance measurement

The Astrophysical Journal, 1994
Dimitar Sasselov, Margarita Karovska
openaire   +1 more source

A Direct Distance to the LMC Cepheid HV 12198 from the Infrared Surface Brightness Technique

, 2000
4 pages, 4 figures, accepted in ApJ LettersWe report on a first application of the infrared surface brightness technique on a Cepheid in the Large Magellanic Cloud, the variable HV 12198 in the young globular cluster NGC 1866.
Fouque, P., Gomez, M., Mennickent, R. E., Storm, J., Gieren, W. P.   +4 more
core  

Molecular Detection of Various Non-Seasonal, Zoonotic Influenza Viruses Using BioFire FilmArray and GenXpert Diagnostic Platforms. [PDF]

Viruses
Ranadheera C, Chestley T, Perez O, Meek B, Hart L, Johnson M, Berhane Y, Bastien N.   +7 more
europepmc   +1 more source

Whole-genome analysis of extensively drug-resistant <i>Enterobacter hormaechei</i> isolated from two hospitalized patients in the United States: A case series of a rare but rising threat. [PDF]

JAC Antimicrob Resist
Arena CJ, Suleyman G, Kaur J, Veve MP, Tibbetts RJ.   +4 more
europepmc   +1 more source

INDEPENDENT DISTANCE DETERMINATIONS TO MILKY-WAY CEPHEIDS IN OPEN CLUSTERS AND ASSOCIATIONS .1. THE BINARY CEPHEID DL CAS IN NGC 129

, 1994
As an eight-day Cepheid which is both a component of a spectroscopic binary and a member of the open cluster NGC 129, DL Cas is potentially a very accurate calibrator of the period-luminosity (PL) relation and Cepheid mass. From 160 high-precision (sigma
WELCH, DL, GIEREN, WP, MATTHEWS, JM, HERTLING, G, MERMILLIOD, JC   +4 more
core