Results 31 to 40 of about 11,049 (214)

A 1.3% Distance to M33 from Hubble Space Telescope Cepheid Photometry

The Astrophysical Journal, 2023
We present a low-dispersion period–luminosity relation (PL) based on 154 Cepheids in Messier 33 (M33) with Hubble Space Telescope (HST) photometry from the PHATTER survey.
Louise Breuval, Adam G. Riess, Lucas M. Macri, Siyang Li, Wenlong Yuan, Stefano Casertano, Tarini Konchady, Boris Trahin, Meredith J. Durbin, Benjamin F. Williams   +9 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

SPECTROSCOPIC INVESTIGATIONS OF GALACTIC CLUSTERS WITH ASSOCIATED CEPHEID VARIABLES. III. COLLINDER 394 AND BB SGR

Odessa Astronomical Publications, 2019
We present the results of a spectro- scopic and photometric investigation of 20 objects from the open cluster Collinder 394, which contains the Cepheid BB Sgr.
I. A. Usenko, A. Yu. Kniazev, I. Yu. Katkov, V. V. Kovtyukh, T. V. Mishenina, A. S. Miroshnichenko, D. G. Turner   +6 more
doaj   +1 more source

A comprehensive study of Cepheid variables in the Andromeda galaxy. Period distribution, blending and distance determination [PDF]

, 2007
Extragalactic Cepheids are the basic rungs of the cosmic distance scale. They are excellent standard candles, although their luminosities and corresponding distance estimates can be affected by the particular properties of the host galaxy. Therefore, the
Alcock, Antonello, Antonello, Antonello, Baade, Baade, Barnes, Beaulieu, Becker, Benedict, Bresolin, C. Jordi, Cotton, F. Vilardell, Feast, Fernie, Fitzpatrick, Fitzpatrick, Fliri, Freedman, Gibson, Hubble, I. Ribas, Kennicutt, Kennicutt, Landolt, Leavitt, Macri, Mochejska, Mochejska, Ngeow, Petersen, Pietrzynski, Ribas, Saha, Sandage, Schwarzenberg-Czerny, Simien, Udalski, Udalski, van Leeuwen, Vilardell, Wozniak, Zakrzewski   +43 more
core   +1 more source

Revising the Milky Way Cepheid Calibration: Quantifying and Correcting for Previously Undetected Distance Modulus Errors in the Gaia-based Multiwavelength Period–Luminosity Relations

The Astrophysical Journal
We examine the multiwavelength period–luminosity–color (PLC) relations for Cepheid variables in the Large and Small Magellanic Clouds and the Milky Way.
Barry F. Madore, Wendy L. Freedman
doaj   +1 more source

Connecting Infrared Surface Brightness Fluctuation Distances to Type Ia Supernova Hosts: Testing the Top Rung of the Distance Ladder

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, Charlotte M. Wood, Peter Milne, Joseph B. Jensen, John P. Blakeslee, Peter J. Brown, Daniel Scolnic, Benjamin Rose, Dillon Brout   +8 more
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
openaire   +1 more source

Cardiovascular Disease Mortality Patterns Among People With Cancer in New South Wales, Australia: A Population‐Wide Data Linkage Study

Cancer Medicine, Volume 15, Issue 3, March 2026.
ABSTRACT Objective To investigate cardiovascular disease (CVD) mortality patterns among people with cancer in New South Wales (NSW) compared to the NSW general population and trends over time. Design Population‐wide retrospective data‐linkage study. Participants and Setting 873,344 people aged ≥ 40 diagnosed with primary invasive cancer and registered ...
Md Mijanur Rahman, Karen Canfell, Katy Bell, Grace Joshy, Michael David, Anne Cust, David Goldsbury, Bogda Koczwara, Emily Banks, Xue Qin Yu   +9 more
wiley   +1 more source

Mitigating Random-phase Sampling Noise in the Cepheid Period–Luminosity Relation: A Cross-filter Consistency Approach

The Astrophysical Journal
The 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, Atefeh Javadi, Barry F. Madore, Wendy L. Freedman, Hamidreza Mahani   +4 more
doaj   +1 more source

Mapping the HPV Detection Landscape in Botswana: A Narrative Review of Diagnostic Platforms and Their Impact on Cervical Cancer Control

Health Science Reports, Volume 9, Issue 3, March 2026.
ABSTRACT Background and Aim Cervical cancer is a major public health issue in Botswana, driven by high HIV prevalence and limited screening access. Molecular detection of high‐risk human papillomavirus (hrHPV) is crucial for prevention and early diagnosis.
Leabaneng Tawe
wiley   +1 more source