Results 81 to 90 of about 577 (218)

The MACHO Project LMC Variable Star Inventory: Classical Cepheids and AGB Variables

, 1998
This paper has been ...
Alves, D., Alcock, C., Cook, K., Marshall, S., Minniti, D., Allsman, R., Axelrod, T., Freeman, K., Peterson, B., Rodgers, A., Griest, K., Vandehei, T., Becker, A., Stubbs, C., Tomaney, A., Bennett, D., Lehner, M., Quinn, P., Pratt, M., Sutherland, W., Welch, D.   +20 more
openaire   +2 more sources

CEPHEID VARIABLE STARS IN THE PEGASUS DWARF IRREGULAR GALAXY: CONSTRAINTS ON THE STAR FORMATION HISTORY

The Astronomical Journal, 2009
Observations of the resolved stars obtained over a period of 11 years in the Local Group dwarf irregular galaxy Pegasus have been used to search for Cepheid variable stars. Images were obtained in 55 epochs in the V band and in 24 epochs in the I band. We have identified 26 Cepheids and have obtained their light curves and periods.
Santi Cassisi, Antonio Aparicio, I. Meschin, Alfred Rosenberg, Carme Gallart   +4 more
openaire   +2 more sources

Testing ultralow amplitude Cepheid candidates in the Galactic disk by TESS and Gaia

, 2023
Ultralow amplitude (ULA) and strange mode Cepheids are thought to be pulsating variable stars that are near to or are at the edges of the classical instability strip.
Szabó, Róbert, Tarczay-Nehéz, Dóra, Bódi, Attila, Dóra Tarczay-Nehéz, Attila Bódi, Róbert Szabó, Molnár, László, László Molnár   +7 more
core   +1 more source

The Orbit and Mass of the Cepheid AW Per

The Astrophysical Journal
The Cepheid AW Per is a component in a multiple system with a long-period orbit. The radial velocities of Griffin cover the 38 yr orbit well. An extensive program of interferometry with the Center for High Angular Resolution Astronomy array is reported ...
Nancy Remage Evans, Alexandre Gallenne, Pierre Kervella, Antoine Mérand, John Monnier, Richard I Anderson, H. Moritz Günther, Charles Proffitt, Elaine M. Winston, Grzegorz Pietrzynski, Wolfgang Gieren, Joanna Kuraszkiewicz, Narsireddy Anugu, Rachael M. Roettenbacher, Cyprien Lanthermann, Mayra Gutierrez, Gail Schaefer, Benjamin R. Setterholm, Noura Ibrahim, Stefan Kraus   +19 more
doaj   +1 more source

The OGLE Collection of Variable Stars. Anomalous Cepheids in the Magellanic Clouds

, 2015
18 pages, 9 figures, submitted to Acta ...
Soszynski, I., Udalski, A., Szymanski, M. K., Pietrzynski, G., Wyrzykowski, L., Ulaczyk, K., Poleski, R., Pietrukowicz, P., Kozlowski, S., Skowron, J., Skowron, D., Mroz, P., Pawlak, M.   +12 more
openaire   +2 more sources

Chicago–Carnegie Hubble Program: A Multiwavelength Search for the Effects of Metallicity on the Cepheid Distance Scale. I. Empirical Evidence

The Astrophysical Journal
Understanding the effects of metallicity on the multiwavelength properties of Cepheids is of continuing importance for their effective use as extragalactic distance indicators and an accurate measure of the Hubble constant, H _0 .
Barry F. Madore, Wendy L. Freedman
doaj   +1 more source

Ultra-low Amplitude Variables in the LMC -- Classical Cepheids, Pop. II Cepheids, RV Tau Stars and Binary Variables

, 2009
A search for variable stars with ultra-low amplitudes (ULA), in the millimag range, has been made in the combined MACHO and OGLE data bases in the broad vicinity of the Cepheid instability strip in the HR diagram. A total of 25 singly periodic and 4 multiply periodic ULA objects has been uncovered.
Buchler, J. Robert, Wood, Peter R., Soszynski, Igor   +2 more
openaire   +2 more sources

THE LUMINOSITY SCALE OF CEPHEID VARIABLE STARS: A REVISION

, 1984
The period-luminosity-color relation for classical Cepheids is discussed in terms of a recent re-determinations of the distance moduli of open clusters with Cepheid members. The distance moduli of eight clusters with well established Cepheid members were
Schmidt, Edward G.
core  

The Araucaria project. Bright variable stars in NGC 6822 from a wide-field imaging survey

, 2006
We have performed a search for variable stars in the dwarf irregular galaxy NGC 6822 using wide-field multi-epoch VI photometry down to a limiting magnitude $V \sim 22$. Apart from the Cepheid variables in this galaxy already reported in an earlier paper
I. Soszyński, G. Pietrzyński, R. E. Mennickent, W. Gieren   +3 more
core   +1 more source

An Exercise on the Use of Cepheid Variable Stars As Astronomical Distance Indicators for Introductory Earth-Science Classes

, 1992
In an effort to provide additional opportunities for active, cooperative learning by students in introductory earth-science classes, I have developed an exercise on the use of cepheid-variable stars as distance indicators. Cepheid-variable stars were the
Shea, James H.
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