Results 71 to 80 of about 1,680 (177)
PULSATIONAL AND ORBITAL PERIODS OF SMALL-AMPLITUDE CEPHEID SU CAS
Odessa Astronomical Publications, 2007 New seven high-resolutional spectra of small-amplitude Cepheid SU Cas have been obtained to determine its atmosphere parameters (Teff=6384 K; log g=2.4; Vt=3.3 km s-1) and to measure its radial velocities.
I. A. Usenko +2 more
doaj +1 more source
On the Age Distribution of Classical Cepheids in the Galaxy
Astronomische Nachrichten, Volume 346, Issue 5, June 2025.ABSTRACT We revisit the problem of the positive correlation between age and Galactocentric distance seen in Galactic Classical Cepheids, which at first sight may seem counter‐intuitive in the context of inside‐out galaxy formation. To explain it, we use the Besançon Galaxy Model and a simulation of star particles in the Galactic disc coupled with ...
Friedrich Anders +5 more
wiley +1 more source
NEW ASPECT OF SMALL-AMPLITUDE CEPHEID SU CAS
Odessa Astronomical Publications, 2008 New 17 high-resolutional spectra of small-amplitude Cepheid SU Cas have been obtained to determine its atmosphere parameters (Teff=6353 K; log g=2.38; Vt=3.25 km s -1 and to measure its radial velocities.
I. A. Usenko +2 more
doaj +1 more source
Cancer, Volume 131, Issue 7, 1 April 2025.Abstract Background Investigation remains incomplete regarding potential variations in the effect of androgen receptor pathway inhibitors, including apalutamide, based on baseline tumor burden in patients with metastatic castration‐sensitive prostate cancer (mCSPC).
Wataru Fukuokaya +9 more
wiley +1 more source
EPJ Web of Conferences, 2017 We present a distance determination to the Small Magellanic Cloud (SMC) using optical and near-infrared photometry from OGLE and IRSF. Applying a multiband method to V, I, J, H and K OGLE and IRSF data, we measured the SMC true distance modulus and mean ...
Wielgorski Piotr +2 more
doaj +1 more source
The Astrophysical JournalWe present phase-corrected photometric measurements of 88 Cepheid variables in the core of the Small Magellanic Cloud (SMC), the first sample obtained with the Hubble Space Telescope's (HST) Wide Field Camera 3, in the same homogeneous photometric system
Louise Breuval +9 more
doaj +1 more source
Prospects for X-Ray and FUV Observations to Provide Insight Into the “Cepheid Mass Problem”
Frontiers in Astronomy and Space Sciences, 2019 The classical Cepheid Leavitt Law (Period-Luminosity relation) has been known for 100 years, and used in extragalactic distance determination for nearly as long.
Nancy Remage Evans, Scott Engle
doaj +1 more source
On improved Cepheid distance estimators
, 1995 Plain Latex version 3.141, 25 pages including figures and tables.
Kanbur, Shashi M., Hendry, Martin A.
openaire +2 more sources
The Potential Broader Complex Linked to the Key Cepheid SV Vul
The Astrophysical JournalA new distance was established to the Cepheid SV Vul ( P ≃ 45 ^d ) and its host cluster Alicante 13, and is tied in part to deeper UKIDSS-DR6 photometry and Gaia DR3 observations ( d = 2.30 ± 0.13 kpc).
Daniel Majaess +12 more
doaj +1 more source
Cepheid and SNIa Distance Scales
, 2001 We first discuss why there remains continuing, strong motivation to investigate Hubble's Constant. Then we review new evidence from an investigation of the Galactic Open Clusters containing Cepheids by Hoyle et al. that the metallicity dependence of the Cepheid P-L relation is stronger than expected. This result is supported by a new analysis of mainly
Shanks, T. +3 more
openaire +2 more sources