Results 61 to 70 of about 11,049 (214)
Cepheid-based Distances to NGC 4303 and NGC 1068
The Astrophysical JournalWe present Cepheid-based distances to two canonical active galactic nuclei: NGC 4303 (M61) and NGC 1068. Data were obtained using the Hubble Space Telescope with nonredundant time spacing over 12 visits for each target, and observations were made with ...
Madison Markham +4 more
doaj +1 more source
A Redetermination of the Hubble Constant with the Hubble Space Telescope from a Differential Distance Ladder [PDF]
, 2009 We report observations of 240 Cepheid variables obtained with the Near Infrared Camera (NICMOS) through the F160W filter on the Hubble Space Telescope (HST).
Adam G. Riess +60 more
core +4 more sources
Cepheids as Distance Indicators
, 1996 We review the use of Cepheids as distance indicators with particular emphasis on the methods which have been applied to HST observations of Cepheids. The calibration of the period-luminosity relations is examined in detail and we identify possible problems with the existing calibrations. New V- and I-band period luminosity relations are presented based
openaire +2 more sources
HipparcosParallaxes and the Cepheid Distance Scale [PDF]
The Astrophysical Journal, 1998 15 pages, 4 figures, Ap. J.
Madore, Barry F., Freedman, Wendy L.
openaire +2 more sources
Treatment variations in localised prostate cancer in Australia and New Zealand: a registry study
BJU International, Volume 136, Issue S2, Page S62-S69, October 2025.Objective To describe the patterns of care and factors associated with treatment uptake of localised prostate cancer, using the bi‐national Prostate Cancer Outcomes Registry–Australia and New Zealand (PCOR‐ANZ) database. Methods Data for 36 504 patients, diagnosed between 2015 and 2018, from New Zealand and seven Australian jurisdictions were evaluated.
Karen Chiam +13 more
wiley +1 more source
The Astrophysical Journal, 2023 Because of their period–luminosity relation (PLR), classical Cepheids play a key role in the calibration of the extragalactic distance scale and the determination of the Hubble–Lemaître constant H _0 .
Paulina Karczmarek +7 more
doaj +1 more source
, 1999 In this paper, we make a comprehensive determination of the Hubble constant $H_0$ by using two parameters - the B-V color and the rate of decline $\Delta m_{15}$ - to simultaneously standardize the luminosities of all nearby Cepheid-calibrated type Ia ...
Beaulieu J. P. +4 more
core +1 more source
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
Health Expectations, Volume 28, Issue 4, August 2025.ABSTRACT Background Australia's human papillomavirus (HPV)‐based National Cervical Screening Program guidelines state that anyone eligible for screening should be offered a choice of using self‐collection or clinician collection for initial screening. Aim To explore the awareness and experiences of women and people with a cervix who have been screened ...
Ana Machado Colling +5 more
wiley +1 more source
The Astronomical JournalIt is beneficial to calibrate the period–Wesenheit–metallicity relation (PWZR) of Delta Cephei stars (DCEPs), i.e., classical Cepheids, using accurate parallaxes of associated open clusters (OCs) from Gaia data release 3 (DR3).
Huajian Wang +5 more
doaj +1 more source