Results 61 to 70 of about 5,382 (167)

Analysis of RR Lyrae Stars in the Northern Sky Variability Survey [PDF]

The Astronomical Journal, 2006
68 pages, 26 figures, 9 tables, accepted to ...
Kinemuchi, K., Smith, H. A., Wozniak, P. R., McKay, T. A., Collaboration., the ROTSE   +4 more
openaire   +2 more sources

A Search of Periodic Variable Stars in the LMC by JWST Photometry

The Astrophysical Journal Supplement Series
Based on high-resolution near-infrared photometric data from the James Webb Space Telescope (JWST) targeting the Large Magellanic Cloud, this study attempts to evaluate the feasibility and sensitivity limits of variable star detection in crowded stellar ...
Jiyu Wang, Xiaodian Chen, Jianxing Zhang, Ziming Yan, Shu Wang, Licai Deng   +5 more
doaj   +1 more source

Precise Empirical Determination of Metallicity Dependence of Near-infrared Period–Luminosity Relations for RR Lyrae Variables

The Astrophysical Journal Letters, 2023
RR Lyrae variables are excellent Population II distance indicators thanks to their well-defined period–luminosity relations (PLRs) at infrared wavelengths.
Anupam Bhardwaj, Marcella Marconi, Marina Rejkuba, Richard de Grijs, Harinder P. Singh, Vittorio F. Braga, Shashi Kanbur, Chow-Choong Ngeow, Vincenzo Ripepi, Giuseppe Bono, Giulia De Somma, Massimo Dall’Ora   +11 more
doaj   +1 more source

Pulsation Properties of Blazhko and Non-Blazhko RRab Stars

The Astrophysical Journal Supplement Series
In this study, we conduct a comparative analysis of the properties of Blazhko and non-Blazhko RRab stars. We identified 1054 non-Blazhko and 785 Blazhko RRab stars in the photometric data observed by the K2 mission, which, combined with those 37 stars ...
Peng Zong, Jian-Ning Fu, Jie Su, Bing-Kai Zhang, Gao-Chao Liu, Weichao Sun, Jiaxin Wang, Bo Zhang, Xueying Hu, Zhongrui Bai, Weikai Zong   +10 more
doaj   +1 more source

Variable Stars in Sagittarius Globular Clusters I. Arp~2

, 2019
We present new photometry and analysis of the twelve variable stars (nine RR Lyrae, three SX Phoenicis) belonging to the Sagittarius globular cluster Arp 2. Of the nine RR Lyrae stars in the cluster, eight are RRab and one is RRc. From the RRab stars, we
Borissova, Jura, Catelan, Márcio, Gehrman, Thomas C., Pritzl, Barton J., Salinas, Ricardo, Smith, Horace A.   +5 more
core   +1 more source

Two Different Weak Modulations in ab-type RR Lyrae Variable V838 Cyg, and Potential Influence of Metal Abundance on Blazhko Modulation

The Astronomical Journal, 2023
Noting the weakest modulation and relatively high metal abundance of the ab-type RR Lyrae star V838 Cyg, we collected the photometric data of this star from several sky surveys to carry out an in-depth analysis. The O − C diagram shows that the pulsation
L.-J. Li, S.-B. Qian, X.-D. Shi, L.-Y. Zhu   +3 more
doaj   +1 more source

The population of variable stars in M54 (NGC6715)

, 2010
We present new B, V and I CCD time-series photometry for 177 variable stars in a 13'X 13' field centered on the globular cluster M54 (lying at the center of the Sagittarius dwarf spheroidal galaxy), 94 of which are newly identified variables.
A. Sollima, Alard, Barning, Bassino, Bellazzini, Bonifacio, Bono, Bono, Brown, C. Cacciari, Cacciari, Cacciari, Cariulo, Carretta, Catelan, Chaboyer, Clement, Clement, Clementini, Clementini, Corwin, Corwin, Corwin, Cseresnjes, Da Costa, Dean, Fernley, Freedman, Gratton, Greco, Ibata, Ibata, Jurcsik, Jurcsik, Kovács, Kunder, Layden, Layden, Lomb, M. Bellazzini, Majewski, Mateo, Mochejska, Monaco, Monaco, Monaco, Monaco, Morgan, Nemec, Nemec, Olech, Oosterhoff, Poretti, Pritzl, Pryor, Rich, Rosenberg, Rosino, Rucinski, S. Colucci, Sandage, Sarajedini, Savage, Schechter, Schlegel, Siegel, Simon, Skrutskie, Smith, Stetson, Sturch, Walker, Zinn   +72 more
core   +1 more source

Multicolour CCD photometry of the variable stars in globular cluster M3 [PDF]

, 2006
We present time series data on the variable stars of the galactic globular cluster Messier 3 (M3). We give BVI light curves for 226 RR Lyrae, 2 SX Phe and 1 W Vir type variables, along with estimated fundamental photometric parameters such as intensity ...
Akerlof, Alard, Alard, Alcock, Alcock, Arellano Ferro, Bailey, Bakos, Bakos, Benkő, Benkő, Blazhko, Buchler, Cacciari, Carretta, Castellani, Castellani, Catelan, Catelan, Clement, Clement, Clement, Clement, Clement, Clementini, Corwin, Corwin, Cudworth, Dziembowski, G. Á. Bakos, Greenstein, Guhathakurta, Hartman, J. M. Benkő, J. Nuspl, Jerzykiewicz, Jurcsik, Jurcsik, Jurcsik, Jurcsik, Kaluzny, Kolláth, Kukarkin, Kukarkin, Larink, Layden, Mallik, Marconi, Moskalik, Murtagh, Müller, Nemec, Oaster, Olech, Olech, Olech, Oosterhoff, Panov, Press, Pritzl, Purdue, Roberts, Rood, Schechter, Smith, Soszyński, Stellingwerf, Stetson, Stetson, Strader, Szabó, Szeidl, Szeidl, Tucholke, Uglesich, Van Albada, Walker, Welty   +77 more
core   +2 more sources

The RR Lyrae Luminosity Metallicity Relation Revisited

The Astronomical Journal
We utilize a set of internally consistent absolute ages for a sample of ten Galactic globular clusters to determine the variation of the slope with the zero point of the M _V (RR) ∼ [Fe/H] relation for RR Lyrae variables.
Ata Sarajedini
doaj   +1 more source

Faint (and bright) variable stars in the satellites of the Milky Way

EPJ Web of Conferences, 2017
I describe two ongoing projects related with variable stars in the satellites of the MilkyWay. In the first project, we are searching for dwarf Cepheid stars (a.k.a δ Scuti and/or SX Phe) in some of the classical dwarf spheroidal galaxies. Our goal is to
Vivas A. Katherina
doaj   +1 more source