Results 21 to 30 of about 4,708,970 (236)

Spectroscopic properties of a two-dimensional time-dependent Cepheid model I. Description and validation of the model

, 2017
Standard spectroscopic analyses of Cepheid variables are based on hydrostatic one-dimensional model atmospheres, with convection treated using various formulations of mixing-length theory.
Freytag, B., Lemasle, B., Ludwig, H. -G., Marconi, M., Vasilyev, V.   +4 more
core   +2 more sources

Properties of M31. II: A Cepheid disk sample derived from the first year of PS1 PAndromeda data

, 2013
We present a sample of Cepheid variable stars towards M31 based on the first year of regular M31 observations of the PS1 survey in the r_P1 and i_P1 filters.
Bender, Ralf, Burgett, W. S., Chambers, K. C., Goessl, Claus, Hodapp, K. W., Hopp, Ulrich, Kaiser, N., Kodric, Mihael, Koppenhoefer, Johannes, Kudritzki, R. -P., Lee, Chien-Hsiu, Magnier, E. A., Ngeow, Chow-Choong, Price, P. A., Riffeser, Arno, Seitz, Stella, Snigula, Jan   +16 more
core   +1 more source

Improving the mass determination of Galactic Cepheids [PDF]

, 2001
We have selected a sample of Galactic Cepheids for which accurate estimates of radii, distances, and photometric parameters are available. The comparison between their pulsation masses, based on new Period-Mass-Radius (PMR) relations, and their ...
Bessell M. S., Bono G., Christy R. F., Deasy H. P., F. Caputo, Feast M. W., Fouque P., Fry A. M., G. Bono, Gieren W. P., Girardi L., Li Y., M. Marconi, P. Fouque, Seaton M. J., W. P. Gieren   +15 more
core   +4 more sources

Discovery of the Longest-period Classical Cepheid in the Milky Way

The Astrophysical Journal Letters
We report the discovery of the classical Cepheid OGLE-GD-CEP-1884 (= GDS_J1535467-555656) with the longest pulsation period known in our Galaxy. The period of 78.14 days is nearly 10 days longer than that of the previous record-holding Cepheid, S ...
I. Soszyński, D. M. Skowron, A. Udalski, P. Pietrukowicz, M. Gromadzki, M. K. Szymański, J. Skowron, P. Mróz, R. Poleski, S. Kozłowski, P. Iwanek, M. Wrona, K. Ulaczyk, K. Rybicki, M. Mróz   +14 more
doaj   +1 more source

The dynamics of variable stars [PDF]

, 1968
Harmonics, pulsation amplitude, and vibratory motion of Cepheid variable ...
Christy, R. F.
core   +1 more source

On the Variation of Fourier Parameters for Galactic and LMC Cepheids at Optical, Near-Infrared and Mid-Infrared Wavelengths [PDF]

, 2014
We present a light curve analysis of fundamental-mode Galactic and Large Magellanic Cloud (LMC) Cepheids based on the Fourier decomposition technique. We have compiled light curve data for Galactic and LMC Cepheids in optical ({\it VI}), near-infrared ({\
Bhardwaj, Anupam, Kanbur, Shashi M., Macri, Lucas M., Ngeow, Chow-Choong, Singh, Harinder P.   +4 more
core   +3 more sources

Stewardship of Molecular Diagnostics in Transplant Viral Infections

Transplant Infectious Disease, EarlyView.
ABSTRACT The transplant environment requires special considerations when testing for viral infections as immunosuppression results in atypical infection profiles. Microbes otherwise considered commensals or causing mild disease can lead to severe infections in transplant environments. Therefore, guidelines tend to recommend broader microbial testing in
Scott Sugden, David Reynoso, Reema Mathew, Michael Loeffelholz   +3 more
wiley   +1 more source

Milky Way Classical Cepheid Distances from Calibrated Infrared Period–Luminosity–Metallicity Relations

The Astrophysical Journal
Classical Cepheids (DCEPs) serve as fundamental standard candles for measuring cosmic distances and investigating the structure and evolution of the Milky Way disk.
Huajian Wang, Xiaodian Chen
doaj   +1 more source

Zwicky Transient Facility and Globular Clusters: The Period–Luminosity and Period–Wesenheit Relations for Anomalous Cepheids Supplemented with Large Magellanic Cloud Sample

The Astronomical Journal, 2022
We present the first gri -band period–luminosity (PL) and period–Wesenheit (PW) relations for the fundamental mode anomalous Cepheids. These PL and PW relations were derived from a combined sample of five anomalous Cepheids in globular cluster M92 and ...
Chow-Choong Ngeow, Anupam Bhardwaj, Matthew J. Graham, Steven L. Groom, Frank J. Masci, Reed Riddle   +5 more
doaj   +1 more source

A revised Cepheid distance to NGC 4258 and a test of the distance scale [PDF]

, 2000
In a previous paper (Maoz et al. 1999), we reported a Hubble Space Telescope (HST) Cepheid distance to the galaxy NGC 4258 obtained using the calibrations and methods then standard for the Key Project on the Extragalactic Distance Scale.
Alibert Y., Barry F. Madore, Eyal Maoz, Ferrarese L., Greenhill L. J., Jeffrey A. Newman, Laura Ferrarese, Maoz E., Marc Davis, Nevalainen J., Peter B. Stetson, Sasselov D. D., Stephen E. Zepf, Udalski A., Wendy L. Freedman   +14 more
core   +2 more sources