Results 31 to 40 of about 1,680 (177)
The Astrophysical JournalThe period–luminosity (PL) relation is usually derived using time-averaged magnitudes, which require multiple-epoch observations to determine periods and adequately sample the light curves.
Mahdi Abdollahi +4 more
doaj +1 more source
Calibration of the Cepheid Distance Scale [PDF]
International Astronomical Union Colloquium, 1993 AbstractThe absolute calibration of the Cepheid period-luminosity (PL) relation with galactic Cepheids is discussed. Various methods, most importantly the cluster ZAMS-fitting scale and the Baade-Wesselink scale are found to yield PL zero points which agree within ∼ ± 0.1 mag. The present Cepheid calibration sets the Large Magellanic Cloud at μ0 (LMC) =
Wolfgang P. Gieren, Pascal Fouqué
openaire +1 more source
The Astrophysical JournalClassical Cepheids (DCEPs) serve as fundamental standard candles for measuring cosmic distances and investigating the structure and evolution of the Milky Way disk.
Huajian Wang, Xiaodian Chen
doaj +1 more source
Toward a renewed Galactic Cepheid distance scale from Gaia and optical interferometry
EPJ Web of Conferences, 2017 Through an innovative combination of multiple observing techniques and modeling, we are assembling a comprehensive understanding of the pulsation and close environment of Cepheids.
Kervella Pierre +11 more
doaj +1 more source
The Astrophysical JournalUsing an updated and significantly augmented sample of Cepheid and tip of the red giant branch (TRGB) distances to 28 nearby spiral and irregular galaxies, covering a wide range of metallicities, we have searched for evidence of a correlation of the zero-
Barry F. Madore, Wendy L. Freedman
doaj +1 more source
On the Distance of Magellanic Clouds: First Overtone Cepheids [PDF]
The Astrophysical Journal, 2002 We present a detailed comparison between predicted and empirical PL_{I,K} relations and Wesenheit function for Galactic and Magellanic Clouds (MCs) First Overtone (FO) Cepheids. We find that zero-points predicted by Galactic Cepheid models based on a noncanonical (mild overshooting) Mass-Luminosity (ML) relation are in very good agreement with ...
Bono, G. +3 more
openaire +2 more sources
Journal of Viral Hepatitis, Volume 33, Issue 6, June 2026.ABSTRACT Ongoing monitoring of hepatitis C virus (HCV) and HIV incidence among people who inject drugs (PWID) is important for epidemic control and assessing progress towards disease elimination. We estimated trends in HIV and HCV infection incidence in a community‐based cohort of PWID in Montreal, Canada.
Bluma Blake Kleiner +9 more
wiley +1 more source
The Astrophysical JournalThis is the second of two papers exploring the effects of metallicity on the multiwavelength properties of Cepheids in terms of their multiwavelength period–luminosity (PL) relations, impacting their use as extragalactic distance indicators and ...
Barry F. Madore +2 more
doaj +1 more source
THE EXTRAGALACTIC DISTANCE SCALE WITHOUT CEPHEIDS. IV. [PDF]
The Astrophysical Journal, 2011 ApJ in press ...
Hislop, Lachlan +9 more
openaire +3 more sources
Cancer Medicine, Volume 15, Issue 5, May 2026.We projected 1‐year to 5‐year cancer prevalence associated with NTRK gene fusions in Australia, from 2020 to 2044, for all paediatric cancers combined (age < 18 years at diagnosis), all adult solid cancers combined, 18 cancer types/groups, and 5 cancer sub‐types relevant to current Australian government subsidies of TRK inhibitors.
Qingwei Luo +5 more
wiley +1 more source