Results 81 to 90 of about 4,708,970 (236)

V659 Cen: System Members Updated

The Astronomical Journal
V659 Cen is a classical Cepheid which is part of a multiple system. Previous observations have shown that a hot companion dominates an ultraviolet spectrum and a cooler main-sequence star dominates an XMM-Newton spectrum. The Hubble Space Telescope Space
Nancy Remage Evans, Charles Proffitt, Pierre Kervella, Joanna Kuraszkiewicz, H. Moritz Günther, Richard I. Anderson, Alexandre Gallenne, Antoine Mérand, Boris Trahin, Giordano Viviani, Shreeya Shetye   +10 more
doaj   +1 more source

FREQUENCY ANALYSIS OF PHOTOGRAPHIC OBSERVATIONS OF PULSATING STARS

Odessa Astronomical Publications, 2017
The Fourier analysis are performed for photoelectric and photographic B-observations (Goranskij and Shugarov, 1979) of RR Lyrae star RW Ari. Besides the main frequency f0 and four its first harmonics two more frequencies are found: f1 =f0 /3 and f2 =0 ...
V. P. Bezdenezhnyi
doaj   +1 more source

The Tully-Fisher Relation and H_not

, 1996
The use of the Tully-Fisher (TF) relation for the determination of the Hubble Constant relies on the availability of an adequate template TF relation and of reliable primary distances.
Appleton P., Brinks E., Cram T. R., Dean J. F., Gary Wegner, Jerjen H., John J. Salzer, Luiz N. da Costa, Martha P. Haynes, Moscardini L., Reakes M. L., Riccardo Giovanelli, Rots A., Shostak S., Shostak S., Tully R. B., Wevers A., Wolfram Freudling   +17 more
core   +1 more source

Identification of 13 Cepheids and 333 Other Variables in M31

, 2003
We present Cousins $R$ and $I$ band photometry of variable stars in a $\sim13'\times 13'$ region in the disk of M31 galaxy, obtained during 141 nights.
A. K. Pandey, Ansari, Beaulieu, Berkhuijsen, Bertelli, Calchi Novati, Cardelli, Crotts, D. Narasimha, Freedman, Freedman, Freedman, Freedman, Holand, Horne, Joshi, Kaluzny, Lafler, Landolt, Madore, Magnier, Magnier, Magnier, Mochejska, Press, R. Sagar, Saha, Saha, Sandage, Sandage, Sasselov, Stanek, Stetson, Tomaney, Udalski, Udalski, Udalski, Udalski, Y. C. Joshi, Y. Giraud-Héraud   +39 more
core   +3 more sources

Stellar Variability and Distance Indicators in the Near-infrared in Nearby Galaxies. I. RR Lyrae and Anomalous Cepheids in Draco Dwarf Spheroidal

The Astronomical Journal
The Draco Dwarf spheroidal (dSph) galaxy is one of the nearest and the most dark-matter-dominated satellites of the Milky Way. We obtained multiepoch near-infrared (NIR, JHK _s ) observations of the central region of Draco dSph covering a sky area of ∼21′
Anupam Bhardwaj, Marina Rejkuba, Chow-Choong Ngeow, Marcella Marconi, Vincenzo Ripepi, Abhinna Sundar Samantaray, Harinder P. Singh   +6 more
doaj   +1 more source

Comments on "The long-period Galactic Cepheid RS Puppis. I. A geometric distance from its light echoes"

, 2008
The luminous Galactic Cepheid RS Puppis is unique in being surrounded by a dust nebula illuminated by the variable light of the Cepheid. In a recent paper in this journal, Kervella et al.
Afsar, Benedict, Bond, Feast, H. E. Bond, Havlen, Henyey, Kervella, Ngeow, Sparks, Sparks, van Leeuwen, W. B. Sparks, Westerlund   +13 more
core   +1 more source

First spectroscopic investigation of Anomalous Cepheid variables [PDF]

, 2023
V. Ripepi, G. Catanzaro, E. Trentin, O. Straniero, A. Mucciarelli, M. Marconi, Anupam Bhardwaj, G. Fiorentino, M. Monelli, J. Storm, Giulia De Somma, S. Leccia, R. Molinaro, I. Musella, Sicignano, T.   +14 more
openalex   +1 more source

The Optical Gravitational Lensing Experiment. The OGLE-III Catalog of Variable Stars. VII. Classical Cepheids in the Small Magellanic Cloud [PDF]

, 2010
I. Soszyński, R. Poleski, A. Udalski, M. K. Szymański, M. Kubiak, G. Pietrzyński, Ł. Wyrzykowski, O. Szewczyk, K. Ulaczyk   +8 more
openalex   +3 more sources

Stellar Pulsation and Evolution: A Combined Theoretical Renewal and Updated Models (SPECTRUM). I. Updating Radiative Opacities for Pulsation Models of Classical Cepheid and RR-Lyrae

The Astrophysical Journal
Pulsating stars are universally recognized as precise distance indicators and tracers of stellar populations. Their variability, combined with well-defined relationships between pulsation properties and intrinsic evolutionary parameters such as ...
Giulia De Somma, Marcella Marconi, Santi Cassisi, Roberto Molinaro   +3 more
doaj   +1 more source

The Behavior of the Paschen and Calcium Triplet Lines in Cepheid Variables II: The 16-day Variable X Cygni [PDF]

, 2019
George Wallerstein, Richard I. Anderson, E. M. Farrell, E. F. Guinan, Meagan Albright, Brianna Lacy, C. Davis, Adam M. Ritchey, L. Eyer, N. Mowlavï   +9 more
openalex   +1 more source