Results 11 to 20 of about 179 (144)

RR Lyrae stars with variable mean magnitudes

Astronomy & Astrophysics
Context. A number of RR Lyrae stars exhibit variable mean magnitudes in the OGLE survey light curves of the Galactic bulge. Hitherto, this phenomenon has not been studied, as it was generally assumed to be related to photometric issues. Aims.
Hajdu G., Jurcsik J., Catelan M., Pietrzyński G., Hocdé V., Soszyński I., Udalski A., Lee C.-U., Kim D.-J.   +8 more
doaj   +3 more sources

Flavours of variability: 29 RR Lyrae stars observed with Kepler [PDF]

Monthly Notices of the Royal Astronomical Society, 2010
We present our analysis of Kepler observations of 29 RR Lyrae stars, based on 138-d of observation. We report precise pulsation periods for all stars. Nine of these stars had incorrect or unknown periods in the literature. Fourteen of the stars exhibit both amplitude and phase Blazhko modulations, with Blazhko periods ranging from 27.7 to more than 200
Benko, J.M., Kolenberg, Katrien, Szabo, R., Kurtz, D.W., Bryson, S., Bregman, J., Still, M., Smolec, R., Nuspl, J., Nemec, J.M., Moskalik, P., Kopacki, G., Kollath, Z., Guggenberger, E., Di Criscienzo, M., Christensen-Dalsgaard, J., Kjeldsen, H., Borucki, W.J., Koch, D., Jenkins, J.M., Van Cleve, J.E.   +20 more
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The Composition of HB Stars: RR Lyrae Variables [PDF]

The Astronomical Journal, 1995
59 pages, Latex using aaspp.sty, ps-files of text, tables (21) and figures (23) available from ftp://boas3.bo.astro.it/pub/gisella To appear in October 1995 Astronomical ...
Clementini, G., Carretta, E., Gratton, R., Merighi, R., Mould, J. R., McCarthy, J. K.   +5 more
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RR Lyrae Variable Stars and the Distance Scale [PDF]

Symposium - International Astronomical Union, 1978
A statistical parallax algorithm (Clube and Dave, 1978a,b), using the technique of maximum likelihood, has been applied to a set of 103 ‘ab’ - RR Lyrae stars in the solar neighborhood (r 2<kpc), using observational data from the Royal Greenwich Observatory Bulletins. A second set of 130 ‘ab’ - RR Lyrae stars has been kindly supplied to us by Dr.
S. V. M. Clube, J. A. Dawe
openaire   +1 more source

Identifying RR Lyrae Variable Stars in Six Years of the Dark Energy Survey [PDF]

The Astrophysical Journal, 2021
Abstract We present a search for RR Lyrae stars using the full six-year data set from the Dark Energy Survey covering ∼5000 deg2 of the southern sky. Using a multistage multivariate classification and light-curve template-fitting scheme, we identify RR Lyrae candidates with a median of 35 observations per candidate.
Stringer, K. M., Drlica-Wagner, A., Macri, L., Martínez-Vázquez, C. E., Vivas, A. K., Ferguson, P., Pace, A. B., Walker, A. R., Neilsen, E., Tavangar, K., Wester, W., Abbott, T. M. C., Aguena, M., Allam, S., Bacon, D., Bechtol, K., Bertin, E., Brooks, D., Burke, D. L., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Costanzi, M., Crocce, M., da Costa, L. N., Pereira, M. E. S., De Vicente, J., Desai, S., Diehl, H. T., Doel, P., Ferrero, I., García-Bellido, J., Gaztanaga, E., Gerdes, D. W., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hinton, S. R., Hollowood, D. L., Honscheid, K., Hoyle, B., James, D. J., Kuehn, K., Kuropatkin, N., Li, T. S., Maia, M. A. G., Marshall, J. L., Menanteau, F., Miquel, R., Morgan, R., Ogando, R. L. C., Palmese, A., Paz-Chinchón, F., Plazas, A. A., Roodman, A., Sanchez, E., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Smith, M., Soares-Santos, M., Suchyta, E., Tarle, G., Thomas, D., To, C., Varga, T. N., Wilkinson, R. D., Zhang, Y., Collaboration, the DES   +69 more
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THE CHEMICAL COMPOSITIONS OF VARIABLE FIELD HORIZONTAL-BRANCH STARS: RR LYRAE STARS [PDF]

The Astrophysical Journal Supplement Series, 2011
We present a detailed abundance study of 11 RR Lyrae ab-type variables: AS Vir, BS Aps, CD Vel, DT Hya, RV Oct, TY Gru, UV Oct, V1645 Sgr, WY Ant, XZ Aps, and Z Mic.High resolution and high S/N echelle spectra of these variables were obtained with 2.5 m du Pont telescope at the Las Campanas Observatory.
For, Bi-Qing, Sneden, Christopher, Preston, George W.   +2 more
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RR Lyrae Variables in the Crater II Dwarf Galaxy [PDF]

The Astrophysical Journal, 2018
Abstract We report the detection of RR Lyrae variable stars in Crater II, a recently discovered large and diffuse satellite dwarf galaxy of the Milky Way (MW). Based on B, V time-series photometry obtained with the Korea Microlensing Telescope Network 1.6 m telescope at Cerro Tololo Inter-American Observatory, we identified 83 ab-type ...
Seok-Joo Joo, Jaemann Kyeong, Soung-Chul Yang, Sang-Il Han, Eon-Chang Sung, Dongwon Kim, Hyunjin Jeong, Chang H. Ree, Soo-Chang Rey, Helmut Jerjen, Hak-Sub Kim, Sang-Mok Cha, Yongseok Lee   +12 more
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RR Lyrae Variable Stars: Pulsational Constraints Relevant to the Oosterhoff Controversy [PDF]

The Astrophysical Journal, 1995
postscript file of 7 pages and 2 figures; one non postcript figure is available upon request; for any problem please write to marcella@astr1pi.difi.unipi ...
Bono, G., Caputo, F., Castellani, V., Marconi, M.   +3 more
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A catalogue of RR Lyrae stars from the Northern Sky Variability Survey [PDF]

Monthly Notices of the Royal Astronomical Society, 2006
Abstract A search for RR Lyrae stars has been conducted in the publicly available data of the Northern Sky Variability Survey. Candidates have been selected by the statistical properties of their variation; the standard deviation, skewness and kurtosis with appropriate limits determined from a sample 314 known RRab and RRc stars listed ...
Wils, Patrick, Lloyd, Christopher, Bernhard, Klaus   +2 more
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RR Lyrae Variables in the Globular Cluster M55. The First Evidence for Nonradial Pulsations in RR Lyr Stars [PDF]

International Astronomical Union Colloquium, 1999
AbstractWe present the results of a photometric study of RR Lyrae variables in the field of the globular cluster M55. We have discovered nine new RR Lyrae stars, increasing the number of known variables in this cluster to 15 objects. Five of the newly discovered variables belong to Bailey type RRc and two to type RRab.
Olech, A., Kaluzny, J., Thompson, I. B., Pych, W., Krzeminski, W., Schwarzenberg-Czerny, A.   +5 more
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