Results 91 to 100 of about 2,384 (215)
The angular diameter and distance of the Cepheid
, 2001 Cepheids are the primary distance indicators for extragalactic astronomy and therefore are of very high astrophysical interest. Unfortunately, they are rare stars, situated very far from Earth.
P. Kervella +5 more
core +1 more source
Influenza and Other Respiratory Viruses, Volume 19, Issue 3, March 2025.ABSTRACT Background The COVID‐19 pandemic has reshaped the landscape of respiratory viral infections globally. This study examines these changes on Reunion Island, a French department in the southeastern Indian Ocean. Methods Retrospective data from 2017 to 2023, from over 24,000 samples collected across the hospital system, partner laboratories, and a
Nicolas M'nemosyme +17 more
wiley +1 more source
Prospects for X-Ray and FUV Observations to Provide Insight Into the “Cepheid Mass Problem”
Frontiers in Astronomy and Space Sciences, 2019 The classical Cepheid Leavitt Law (Period-Luminosity relation) has been known for 100 years, and used in extragalactic distance determination for nearly as long.
Nancy Remage Evans, Scott Engle
doaj +1 more source
The long-period Galactic Cepheid RS Puppis - I. A geometric distance from its light echoes
, 2007 14 pages in electronic formInternational audienceContext: The bright southern Cepheid RS Pup is surrounded by a circumstellar nebula reflecting the light from the central star.
Kervella, Pierre +13 more
core +1 more source
Calibrating the Cepheid distance scalewith Gaia
, 2021 Cepheid stars play a considerable role as astronomical distances indicators thanks to the empirical relation between their pulsation period and intrinsic luminosity: the PL relation.
Breuval, Louise
core +1 more source
The Astrophysical JournalWe 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 +9 more
doaj +1 more source
The extragalactic Cepheid distance bias: Numerical simulations
, 2004 We present numerical simulations for a selection bias in the extragalactic Cepheid method (as detected in Teerikorpi & Paturel [CITE]), which results in underestimated distances for host galaxies.
P. Teerikorpi, G. Paturel
core +1 more source
On improved Cepheid distance estimators
, 1995 Plain Latex version 3.141, 25 pages including figures and tables.
Kanbur, Shashi M., Hendry, Martin A.
openaire +2 more sources
, 2006 We have measured near-infrared magnitudes in the J and K bands for 56 Cepheid variables in the Local Group galaxy NGC 6822 with well-determined periods and optical light curves in the V and I bands.
Nalewajko, K. +7 more
core +1 more source
Ultra-long-period Cepheids as Standard Candles from Gaia to Rubin-LSST
The Astrophysical Journal Supplement SeriesAn 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 +12 more
doaj +1 more source