Results 21 to 30 of about 1,730 (181)
Cepheid Distances to Nearby Galaxies [PDF]
International Astronomical Union Colloquium, 1995 AbstractWe have determined new Cepheid distances on a homogeneous system to nine nearby galaxies with Cepheid observations in the V bandpass, using the extensive calibration of the galactic Cepheid PL(V) relation of Gieren, Barnes & Moffett (1993).
Wolfgang P. Gieren +4 more
openaire +1 more source
The Astrophysical Journal, 2023 We compare infrared surface brightness fluctuation (IR SBF) distances measured in galaxies that have hosted type Ia supernovae (SNe Ia) to distances estimated from SNe Ia light-curve fits.
Peter Garnavich +8 more
doaj +1 more source
Tropical Medicine &International Health, EarlyView.ABSTRACT Introduction Childhood tuberculosis (TB) remains a significant global health challenge, with a substantial number of cases going undiagnosed, particularly among children under five. Early diagnosis and intervention are crucial to reduce TB‐associated morbidity and mortality.
Julia van den Brink +8 more
wiley +1 more source
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
MicrobiologyOpen, Volume 15, Issue 5, October 2026.A newly emerged vanB‐VREfm clone (ST117/CT7799) causes an ongoing outbreak in southeastern Austria. The cluster is highly homogenous, even for isolates sampled months apart. Resistance is easily missed via disk diffusion, gradient tests, and microdilution. VITEK 2 testing reliably detects vancomycin‐resistance.
Patrick Forstner +12 more
wiley +1 more source
THE EXTRAGALACTIC DISTANCE SCALE WITHOUT CEPHEIDS. III. [PDF]
The Astrophysical Journal, 2008 Distances of galaxies in the Hubble Space Telescope Key Project are based on the Cepheid period-luminosity relation. An alternative basis is the tip of the red giant branch. Using archival HST data, we calibrate the infrared Tully-Fisher relation using 14 galaxies with tip of the red giant branch measurements.
Mould, Jeremy, Sakai, Shoko
openaire +5 more sources
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 CEPHEID DISTANCE TO NGC 0247
The Astrophysical Journal, 2009 We report VRI CCD observations of nine Cepheids in the South Polar (Sculptor) Group spiral galaxy NGC 0247. Periods of these Cepheids range from 20 to 70 days. Over the past 20 years, the brightest Cepheid in our sample, NGC 0247:[MF09] C1, has decreased its period by 6%, faded by 0.8 mag in the V band, and become bluer by 0.23 mag in (V–I).
Barry F. Madore +3 more
openaire +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