Results 111 to 120 of about 11,049 (214)

The Araucaria Project. The Distance to the Local Group Galaxy WLM from Near-Infrared Photometry of Cepheid Variables

, 2008
We have obtained deep images in the near-infrared J and K filters for several fields in the Local Group galaxy WLM. We report intensity mean magnitudes for 31 Cepheids located in these fields which we previously discovered in a wide-field optical imaging
Dante Minniti, Fabio Bresolin, Grzegorz Pietrzyński, Igor Soszyński, Jesper Storm, Miguel A. Urbaneja, Olaf Szewczyk, Rolf‐Peter Kudritzki, Wolfgang Gieren   +8 more
core   +1 more source

JWST Validates HST Distance Measurements: Selection of Supernova Subsample Explains Differences in JWST Estimates of Local H 0

The Astrophysical Journal
We cross-check the Hubble Space Telescope (HST) Cepheid/Type Ia supernova (SN Ia) distance ladder, which yields the most precise local H _0 , against early James Webb Space Telescope (JWST) subsamples (∼1/4 of the HST sample) from SH0ES and CCHP ...
Adam G. Riess, Dan Scolnic, Gagandeep S. Anand, Louise Breuval, Stefano Casertano, Lucas M. Macri, Siyang Li, Wenlong Yuan, Caroline D. Huang, Saurabh Jha, Yukei S. Murakami, Rachael Beaton, Dillon Brout, Tianrui Wu, Graeme E. Addison, Charles Bennett, Richard I. Anderson, Alexei V. Filippenko, Anthony Carr   +18 more
doaj   +1 more source

The TRGB-SBF Project. I. A Tip of the Red Giant Branch Distance to the Fornax Cluster with JWST

The Astrophysical Journal
Differences between the local value of the Hubble constant measured via the distance ladder versus the value inferred from the cosmic microwave background with the assumption of the standard ΛCDM model have reached over 5 σ significance.
Gagandeep S. Anand, R. Brent Tully, Yotam Cohen, Dmitry I. Makarov, Lidia N. Makarova, Joseph B. Jensen, John P. Blakeslee, Michele Cantiello, Ehsan Kourkchi, Gabriella Raimondo   +9 more
doaj   +1 more source

A Global Physical Model for Cepheids

, 2012
We perform a global fit to ~5,000 radial velocity and ~177,000 magnitude measurements in 29 photometric bands covering 0.3 to 8.0 microns distributed among 287 Galactic, LMC, and SMC Cepheids with P > 10 days.
Albrecht, Antonello, Benedict, Berdnikov, Berry, Bersier, Bird, Bono, Bono, Bono, Bono, Bresolin, Burki, Caldwell, Caldwell, Castelli, Christopher S. Kochanek, Cioni, Coulson, Falco, Feast, Feast, Fiorentino, Freedman, Freedman, Freedman, Freedman, Gerke, Gieren, Glass, Gordon, Gorynya, Gorynya, Gorynya, Harris, Hauschildt, Hauschildt, Hendry, Hertzsprung, Imbert, Imbert, Indebetouw, Keller, Kochanek, Laney, Laney, Laney, Lloyd Evans, Lloyd Evans, Macri, Madore, Madore, Madore, Marconi, Marengo, Martin, Martin, Misselt, Mochejska, Moffett, Motta, Ngeow, Ngeow, Ngeow, Nikolaev, Nishiyama, Ondřej Pejcha, Oosterhoff, Paczyński, Pel, Perryman, Persson, Pont, Pont, Press, Riess, Riess, Riess, Riess, Román-Zúñiga, Sakai, Sasselov, Scowcroft, Shappee, Soszyński, Soszyński, Stibbs, Szabados, Szabó, Udalski, van Genderen, van Genderen, Walraven, Walraven, Wesselink, Yoachim   +95 more
core   +1 more source

Theoretical models for classical Cepheids. VIII. Effects of helium and heavy elements abundance on the Cepheid distance scale

, 2002
Previous nonlinear fundamental pulsation models for classical Cepheids with metal content Z
Alibert Y., Bono G., Caputo F., Caputo F., Castelli F., Castelli F., F. Caputo, Feast M. W., G. Fiorentino, I. Musella, Lequeux J., M. Marconi, Pagel B. E. J., Pagel B. E. J., Sasselov D., Udalski A., Unno W.   +16 more
core   +2 more sources

Resolving the Hubble tension 68.261 and 73.510 km s−1 Mpc−1

AIP Advances
We present, when calculating distance ladders, that using the expression H = (km/Mpc)/AU (AU is the age of the universe) to describe the metric expansion of space in a universe with flat curvature, we resolve a baseline expression for the Hubble constant
Jody A. Geiger
doaj   +1 more source

Physical parameters and the projection factor of the classical Cepheid in the binary system OGLE-LMC-CEP-0227

, 2013
A novel method of analysis of double-lined eclipsing binaries containing a radially pulsating star is presented. The combined pulsating-eclipsing light curve is built up from a purely eclipsing light curve grid created using an existing modeling tool ...
Bono, G., Freedman, W. L., Gallenne, A., Gieren, W., Graczyk, D., Konorski, P., Madore, B. F., Moroni, P. G. Prada, Nardetto, N., Pietrzyński, G., Pilecki, B., Scowcroft, V., Smolec, R., Soszyński, I., Storm, J., Thompson, I. B., Udalski, A.   +16 more
core   +1 more source

A Cepheid distance to NGC 4258

, 1999
Approved for publication in Nature. Strictly embargoed from publicity until one week before publication.
Maoz, Eyal, Newman, Jeffrey A., Ferrarese, Laura, Stetson, Peter B., Zepf, Stephen E., Davis, Marc, Freedman, Wendy L., Madore, Barry F.   +7 more
openaire   +2 more sources

SPECTROSCOPIC INVESTIGATIONS OF GALACTIC CLUSTERS WITH ASSOCIATED CEPHEID VARIABLES. II. NGC 5662 AND V CEN

Odessa Astronomical Publications, 2018
We present the results of a spectroscopic and photometric investigation of 15 objects from the open cluster NGC 5662, which contains the Cepheid V Cen. Besides the Cepheid, we studied one G-supergiant, two K-giants, four B-giants, and seven main sequence
I. A. Usenko, A. Yu. Kniazev, V. V. Kovtyukh, T. V. Mishenina, A. S. Miroshnichenko, D. G. Turner, Yu. I. Protsyuk   +6 more
doaj   +1 more source

The distances of cepheid variables [PDF]

Monthly Notices of the Royal Astronomical Society, 1977
T. G. Barnes, J. F. Dominy, D. S. Evans, P. W. Kelton, S. B. Parsons, R. J. Stover   +5 more
openaire   +1 more source