Results 11 to 20 of about 1,680 (177)
Point-of-care nucleic acid testing - a step forward in controlling the HIV epidemic: A review. [PDF]
HIV MedAbstract Introduction The HIV/AIDS epidemic, with 85.6 million infections and 40.4 million AIDS‐related deaths globally, remains a critical public health challenge. Current diagnostic methods, primarily fourth‐generation immunoassays, have limitations due to their long window periods, and most viral load assays require centralized testing protocols ...
Pinar SS +4 more
europepmc +2 more sources
THE DISTANCE MEASUREMENT OF NGC 1313 WITH CEPHEIDS [PDF]
The Astrophysical Journal, 2015 We present the detection of Cepheids in the barred spiral galaxy NGC 1313, using the Wide Field and Planetary Camera 2 on the Hubble Space Telescpoe. Twenty B (F450W) and V (F555W) epochs of observations spanning over three weeks were obtained, on which the profile-fitting photometry of all stars in the monitored field was performed using the package ...
Gao, Qing +3 more
openaire +2 more sources
The Effect of Metallicity on Cepheid‐based Distances [PDF]
The Astrophysical Journal, 2004 Accepted for publication in the Astrophysical Journal. 56 pages, 16 figures (jpg).
Sakai, Shoko +3 more
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M33 Cepheids from CFHT/MegaCam Survey
The Astronomical Journal, 2022 In this paper we analyze Sloan g, r, i archival imaging data of M33 taken by Hartman et al. using MegaCam at the Canada–France–Hawaii Telescope. To determine the distance to the M33 galaxy, we performed several analytical steps to identify its Cepheid ...
Samuel Adair, Chien-Hsiu Lee
doaj +1 more source
Cepheid Distance to the Virgo Cluster [PDF]
International Astronomical Union Colloquium, 2000 AbstractA reanalysis of the HST data on Cepheids in the Virgo cluster spiral M100 is presented, based on our study of the Galactic Cepheids. A distance modulus of 31.49 mag is derived, which is higher than the HST Key Project value of 31.04 mag obtained from the same data earlier (Ferrarese et al. 1996). The increase in the distance is caused by nearly
Anwesh Mazumdar, D. Narasimha
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Prevalence and Risk Factors of Elevated Alanine Aminotransferase (ALT) in 2382 Treatment-naïve HBV/HDV Co-Infected Patients. [PDF]
Liver IntABSTRACT Background Chronic hepatitis D (CHD) causes severe chronic hepatitis. Knowledge is limited about factors correlating with ALT in treatment‐naïve patients with CHD. This study analysed the pattern and determinants of ALT elevation in a large cohort of patients with CHD, including young adults, compared to propensity score‐matched (PSM) patients
Kamal H +13 more
europepmc +2 more sources
Distances and Radii of Classical Cepheids [PDF]
International Astronomical Union Colloquium, 1985 We have used new BVRI photometry and radial velocities of a selection of bright classical Cepheids to determine their distances and radii through the surface brightness method. The improved photometry permitted, through the visual surface brightness relation, high-quality angular-diameter values for each Cepheid throughout its pulsation.
T. G. Barnes, T. J. Moffett
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The Astrophysical Journal Letters, 2023 High-resolution James Webb Space Telescope (JWST) observations can test confusion-limited Hubble Space Telescope (HST) observations for a photometric bias that could affect extragalactic Cepheids and the determination of the Hubble constant.
Adam G. Riess +9 more
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The nebulosity and distance of the Cepheid RS Puppis [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2008 Abstract Adopting a distance for RS Pup derived from a period-luminosity relation based on Cepheid parallaxes, it is shown that the phase-lag observations of the surrounding nebulosity by Kervella et al. are well fitted by a model of an equatorial disc at an angle of to the plane of the sky.
openaire +2 more sources
The Astrophysical Journal, 2023 We present Young Supernova Experiment grizy photometry of SN 2021hpr, the third Type Ia supernova sibling to explode in the Cepheid calibrator galaxy, NGC 3147.
Sam M. Ward +25 more
doaj +1 more source