Results 101 to 110 of about 11,049 (214)

Small Magellanic Cloud Cepheids Observed with the Hubble Space Telescope Provide a New Anchor for the SH0ES Distance Ladder

The Astrophysical Journal
We present phase-corrected photometric measurements of 88 Cepheid variables in the core of the Small Magellanic Cloud (SMC), the first sample obtained with the Hubble Space Telescope's (HST) Wide Field Camera 3, in the same homogeneous photometric system
Louise Breuval, Adam G. Riess, Stefano Casertano, Wenlong Yuan, Lucas M. Macri, Martino Romaniello, Yukei S. Murakami, Daniel Scolnic, Gagandeep S. Anand, Igor Soszyński   +9 more
doaj   +1 more source

Ultra-long-period Cepheids as Standard Candles from Gaia to Rubin-LSST

The Astrophysical Journal Supplement Series
An analysis of the properties of ultra-long-period Cepheids (ULPs) could significantly contribute to understanding the Hubble constant tension, e.g., the current discrepancy between determinations based on local distance indicators and those relying on ...
Ilaria Musella, S. Leccia, R. Molinaro, M. Marconi, F. Cusano, M. Di Criscienzo, G. Fiorentino, V. Braga, V. Ripepi, G. De Somma, M. Gatto, E. Luongo, T. Sicignano   +12 more
doaj   +1 more source

Cosmicflows-2: SNIa Calibration and H0

, 2012
The construction of the Cosmicflows-2 compendium of distances involves the merging of distance measures contributed by the following methods: (Cepheid) Period-Luminosity, Tip of the Red Giant Branch (TRGB), Surface Brightness Fluctuation (SBF ...
Amanullah, Bernardi, Bernardi, Blakeslee, Blakeslee, Catinella, Courtois, Dale, Folatelli, Freedman, Freedman, Freedman, Hicken, Hélène M. Courtois, Jha, Komatsu, Masters, Perlmutter, Prieto, R. Brent Tully, Riess, Riess, Riess, Rizzi, Sakai, Springob, Tonry, Tonry, Tully, Tully, Tully, Tully   +31 more
core   +3 more sources

Highlights on eclipsing binary variables from Araucaria Project

EPJ Web of Conferences, 2015
The Araucaria Project, which main goal is to provide precise determination of the cosmic distance scale, has recently made a set of discoveries involving variable stars in binary systems. Among these discoveries we highlight three: 1% precise measurement
Karczmarek Paulina, Pietrzyński Grzegorz, Gieren Wolfgang, Pilecki Bogumił, Graczyk Dariusz, Thompson Ian, Górski Marek, Konorski Piotr, Suchomska Ksenia, Nardetto Nicholas, Smolec Radoslaw   +10 more
doaj   +1 more source

NEW CATALOG OF DISTANCES AND LIGHT CURVE PARAMETERS OF CLASSICAL CEPHEIDS

Odessa Astronomical Publications, 2017
A new version of the catalogue of distances and light-curve parameters for galactic classical Cepheids is presented. The catalogue lists amplitudes, magnitudes at maximum light, and intensity means for 515 stars in UBVRI filters of the Johnson system ...
L. N. Berdnikov
doaj   +1 more source

Cepheids and the Distance Ladder

, 2016
Classical Cepheids plays a key role in the calibration of the extragalactic distance scale. In spite of their importance, some uncertainties related to their properties remain. In particular, a general consensus on the possible dependence on the metallicity of the host galaxy of the Cepheid properties has not been reached yet. These uncertainties could
openaire   +2 more sources

Infrared Surface Brightness Distances to Cepheids

, 2005
4 pages, 4 figures, conference ...
Barnes III, Thomas G., Storm, Jesper, Jefferys, William H., Gieren, Wolfgang P., Fouque, Pascal   +4 more
openaire   +2 more sources

Decentralised COVID‐19 molecular point‐of‐care testing: lessons from implementing a primary care‐based network in remote Australian communities

Medical Journal of Australia, Volume 222, Issue 4, Page 172-178, March 2025.
Belinda Hengel, Rebecca J Guy, Dawn Casey, Lorraine Anderson, Kirsty Smith, Kelly Andrewartha, Tanya D Applegate, Amit Saha, Philip Cunningham, Lucas DeToca, William D Rawlinson, Marianne Martinello, Annie Tangey, Prital Patel, Mark DS Shephard, Susan Matthews, Louise Causer   +16 more
wiley   +1 more source

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

An independent Cepheid distance scale: Current status [PDF]

An independent distance scale for Cepheid variables is discussed. The apparent magnitude and the visual surface brightness, inferred from an appropriate color index, are used to determine the angular diameter variation of the Cepheid.
Barnes, T. G., III
core   +1 more source