Results 81 to 90 of about 2,384 (215)
The Astrophysical Journal LettersWe present high-definition observations with the James Webb Space Telescope (JWST) of >1000 Cepheids in a geometric anchor of the distance ladder, NGC 4258, and in five hosts of eight Type Ia supernovae, a far greater sample than previous studies with ...
Adam G. Riess +9 more
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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
The Astronomical JournalWe present a novel technique for mapping single-phase observations of Cepheids in any given band into their time-averaged values, using strong priors on the known interrelations of the multiwavelength widths of Cepheid period–luminosity (PL) relations ...
Barry F. Madore +2 more
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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
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An independent Cepheid distance scale: Current status
, 1980 An independent distance scale for Cepheid variables is discussed. The apparent magnitude and the visual surface brightness, inferred from an appropriate color index, are used to determine the angular diameter variation of the Cepheid.
Barnes, T. G., III
core
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
The Astrophysical Journal LettersRecently, a double-lined binary classical Cepheid, OGLE-LMC-CEP-1347, was discovered with the orbital period ( P _orb = 59 days), 5 times shorter than that of any binary Cepheid known before.
Felipe Espinoza-Arancibia +1 more
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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
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Cepheid Variables and their Application to the Cosmological Distance Scale
, 2013 In the current era of precision cosmology , measuring the expansion rate of the Universe (Hubble constant, or H0) more accurately and precisely helps to better constrain the properties of dark energy. Cepheid-based distances are a critical step in
Hoffmann, Samantha L
core
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
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