Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Christine M. Clement"'
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 411:1744-1762
The period changes of 86 M5 RR Lyrae stars have been investigated on a one-hundred-year time base. The published observations have been supplemented by archival Asiago, Konkoly and Las Campanas photographic observations obtained between 1952 and 1993
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 411:1763-1779
The light curves of 50 RRab (RR0) stars in M5 collected in Paper I are investigated to detect Blazhko modulation. 18 Blazhko stars are identified, and modulation is suspected in two additional cases. The mean pulsation period of Blazhko stars is 0.04
Publikováno v:
International Astronomical Union Colloquium. 193:180-183
Fourier coefficients have been derived for the V and R light curves of 330 bona fide RR Lyrae first-overtone (RR1) pulsators in 16 MACHO fields near the bar of the LMC. We use the Fourier phase parameter ɸ31 and log P values to select a subsample of
Autor:
T. Vandehei, K. H. Cook, S. L. Marshall, William J. Sutherland, A. B. Tomaney, Marla Geha, D. L. Welch, David R. Alves, R. A. Allsman, Andrew J. Drake, P. Popowski, C. A. Nelson, Dante Minniti, Christopher W. Stubbs, Kenneth C. Freeman, David P. Bennett, Kim Griest, T. S. Axelrod, Christine M. Clement, Jason F. Rowe, A. W. Rodgers, Peter J. Quinn, Charles Alcock, Bruce A. Peterson, A. C. Becker, Mark Pratt, D. W. Kurtz, Géza Kovács, Matthew J. Lehner
Publikováno v:
ASTROPHYSICAL JOURNAL
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
More than 1300 variables classified provisionally as first overtone RR Lyrae pulsators in the MACHO variable star database of the Large Magellanic Cloud (LMC) have been subjected to standard frequency analysis. Based on the remnant power in the prewh
Autor:
Christine M. Clement, Ian Shelton
Publikováno v:
The Astronomical Journal. 118:453-461
CCD observations have been used to study 16 of the previously known variables in the Oosterhoff type II globular cluster M9. The properties of the RR Lyrae variables in M9 are compared with those in the Oosterhoff type I cluster M3. Methods devised b
Autor:
V. P. Goranskij, Christine M. Clement
Publikováno v:
The Astrophysical Journal. 513:767-774
The RR Lyrae variable V79 in M3 has been studied on approximately 1000 photographs in the Sternberg Observatory plate collection and on 126 CCD frames. The photographs were obtained over the interval 1949-1992, and the CCD observations were made in 1
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 296:347-358
We describe here results of a photometric time-sequence survey of the globular cluster M3 (NGC 5272), in a search for contact and detached eclipsing binary stars. We have discovered only one likely eclipsing binary and one SX Phe type star in spite o
Publikováno v:
The Astrophysical Journal. 489:L55-L58
New observations of variable stars in the globular cluster M3 reveal that the RR Lyrae variable V79 is a double-mode (RRd) variable with the first overtone mode dominating. In all previous studies, V79 was found to be a fundamental mode (RRab) pulsat
Autor:
Norman R. Simon, Christine M. Clement
Publikováno v:
International Astronomical Union Colloquium. 139:315-323
A large number of hydrodynamic pulsation models are converged in the first overtone, and their mean properties compared with observations of RRc stars in six globular clusters. The two observed quantities, period and Fourier parameter ϕ31, lead, via
Autor:
Christine M, Clement
Publikováno v:
Science (New York, N.Y.). 297(5581)