Results 71 to 80 of about 5,541 (198)

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

RR Lyrae Stars as Seen by the Kepler Space Telescope

Frontiers in Astronomy and Space Sciences, 2021
The unprecedented photometric precision along with the quasi-continuous sampling provided by the Kepler space telescope revealed new and unpredicted phenomena that reformed and invigorated RR Lyrae star research.
Emese Plachy, Emese Plachy, Emese Plachy, Róbert Szabó, Róbert Szabó, Róbert Szabó   +5 more
doaj   +1 more source

Asteroseismological Analysis of the Non-Blazhko RRab Star EPIC 248846335 in the LAMOST–Kepler/K2 Project

The Astronomical Journal
We conduct an asteroseismological analysis on the non-Blazhko ab-type RR Lyrae star EPIC 248846335, employing the Radial Stellar Pulsations module of the Modules for Experiments in Stellar Astrophysics based on the set of stellar parameters.
Peng Zong, Jian-Ning Fu, Jie Su, Xueying Hu, Bo Zhang, Jiaxin Wang, Gao-Chao Liu, Gang Meng, Gianni Catanzaro, Antonio Frasca, Haotian Wang, Weikai Zong   +11 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

A Preliminary Discussion of the Kinematics of BHB and RR Lyrae Stars near the North Galactic Pole [PDF]

, 1996
The radial velocity dispersion of 67 RR Lyrae variable and blue horizontal branch (BHB) stars that are more than 4 kpc above the galactic plane at the North Galactic Pole is 110 km/sec and shows no trend with Z (the height above the galactic plane). Nine
Hanson, Robert B., Harmer, D. L., Kinman, T. D., Klemola, A. R., Kraft, Robert P., Pier, Jeffrey R., Suntzeff, Nicholas B., Valdes, F.   +7 more
core   +2 more sources

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

Search for high-amplitude Delta Scuti and RR Lyrae stars in Sloan Digital Sky Survey Stripe 82 using principal component analysis [PDF]

, 2012
We propose a robust principal component analysis (PCA) framework for the exploitation of multi-band photometric measurements in large surveys. Period search results are improved using the time series of the first principal component due to its optimized ...
Bartholdi, P., Beck, M., Becker, A. C., Dubath, P., Eyer, L., Ivezić, Ž., Mowlavi, N., Nienartowicz, K., Rimoldini, L., Sesar, B., Süveges, M., Váradi, M.   +11 more
core   +2 more sources

Pulsating star research and the Gaia revolution

EPJ Web of Conferences, 2017
In this article we present an overview of the ESA Gaia mission and of the unprecedented impact that Gaia will have on the field of variable star research.
Eyer Laurent, Clementini Gisella, Guy Leanne P., Rimoldini Lorenzo, Glass Florian, Audard Marc, Holl Berry, Charnas Jonathan, Cuypers Jan, Ridder Joris De, Evans Dafydd W., de Fombelle Gregory Jevardat, Lanzafame Alessandro, Lecoeur-Taibi Isabelle, Mowlavi Nami, Nienartowicz Krzysztof, Riello Marco, Ripepi Vincenzo, Sarro Luis, Süveges Maria   +19 more
doaj   +1 more source

Variable stars in the globular cluster M28 (NGC 6626)

, 2012
We present a new search for variable stars in the Galactic globular cluster M28 (NGC 6626). The search is based on a series of BVI images obtained with the SMARTS Consortium's 1.3m telescope at Cerro Tololo Inter-American Observatory, Chile.
Alonso-Garcia, J., Catelan, M., Prieto, G., Pritzl, B. J., Ramos, R. Contreras, Smith, H. A.   +5 more
core   +1 more source

Horizontal Branch Stars: The Interplay between Observations and Theory, and Insights into the Formation of the Galaxy

, 2009
We review HB stars in a broad astrophysical context, including both variable and non-variable stars. A reassessment of the Oosterhoff dichotomy is presented, which provides unprecedented detail regarding its origin and systematics.
A. Baran, A. Bragaglia, A. Bressan, A. Dieball, A. Dieball, A. Dieball, A. Gould, A. Maeder, A. Meza, A. Miceli, A. Nagy, A. Olech, A. Ramdani, A. Recio-Blanco, A. Recio-Blanco, A. Recio-Blanco, A. Renzini, A. Renzini, A. Renzini, A. Ritter, A. Rosenberg, A. Rosenberg, A. Sandage, A. Sandage, A. Sandage, A. Sandage, A. Sandage, A. Sandage, A. Sandage, A. Sandage, A. Sandage, A. Sandage, A. Sarajedini, A. Serenelli, A. Sills, A. Sollima, A. Sollima, A. Wehlau, A.A.R. Valcarce, A.C. Edwards, A.C. Layden, A.C. Layden, A.C. Layden, A.C. Layden, A.C. Layden, A.C. Layden, A.D. Mackey, A.D. Mackey, A.D. Mackey, A.D. Mackey, A.D. Mackey, A.E. Dolphin, A.G.D. Philip, A.H. Bon-Hoa, A.J. Grocholski, A.J. Longmore, A.J. Longmore, A.J. Longmore, A.J. Wickett, A.K. Dambis, A.K. Vivas, A.K. Vivas, A.K. Vivas, A.K. Vivas, A.M. Hopkins, A.N. Cox, A.N. Sumerel, A.P. Milone, A.R. Walker, A.R. Walker, A.R. Walker, A.R. Walker, A.R. Walker, A.R. Walker, A.V. Sweigart, A.V. Sweigart, A.V. Sweigart, A.V. Sweigart, A.V. Sweigart, A.V. Sweigart, A.V. Sweigart, A.V. Sweigart, A.V. Sweigart, A.V. Sweigart, A.V. Sweigart, A.V. Sweigart, A.V. Sweigart, A.Y. Potekhin, A.Y. Potekhin, B. Chaboyer, B. Chaboyer, B. Dorman, B. Dorman, B. Dorman, B. Pritzl, B. Szeidl, B.B. Behr, B.B. Behr, B.B. Behr, B.B. Behr, B.B. Behr, B.F. Williams, B.J. Pritzl, B.J. Pritzl, B.J. Pritzl, B.J. Pritzl, B.J. Pritzl, B.J. Pritzl, B.L. Popielski, B.W. Carney, B.W. Carney, B.Y. Welsh, C. Alcock, C. Alcock, C. Alcock, C. Alcock, C. Cacciari, C. Cacciari, C. Cacciari, C. Cacciari, C. Cacciari, C. Cortés, C. Cáceres, C. Gallart, C. Gallart, C. Greco, C. Greco, C. Kuehn, C. Maraston, C. Moni Bidin, C. Moni Bidin, C. Palma, C. Sneden, C. Sterken, C. Thom, C.H. Ree, C.J. Pritchet, C.M. Clement, C.M. Clement, C.M. Clement, C.S. Jeffery, D. Butler, D. Fabbian, D. Geisler, D. Kilkenny, D. Kilkenny, D. Martínez-Delgado, D. Minniti, D. Reimers, D. Reimers, D. Yong, D. Zaritsky, D.-H. Cho, D.A. VandenBerg, D.A. VandenBerg, D.B. Boerker, D.I. Dinescu, D.I. Dinescu, D.J. Schlegel, D.M. Terndrup, D.M. Terndrup, D.N. Spergel, D.N. Spergel, D.R. Alves, D.R. Xiong, D.S.P. Dearborn, E. Brocato, E. Brocato, E. Carretta, E. Carretta, E. Carretta, E. Carretta, E. Choi, E. Choi, E. Horch, E. Sirko, E.B. Newell, E.B. Newell, E.B. Newell, E.B. Newell, E.C. Pickering, E.C. Pickering, E.E. Barnard, E.M. Green, E.M. Green, E.M. Green, F. Angeli De, F. Caputo, F. Caputo, F. Caputo, F. Caputo, F. Caputo, F. Caputo, F. Castelli, F. D’Antona, F. D’Antona, F. D’Antona, F. D’Antona, F. D’Antona, F. D’Antona, F. Fusi Pecci, F. Fusi Pecci, F. Fusi Pecci, F. Fusi Pecci, F. Fusi Pecci, F. Grundahl, F. Grundahl, F. Grundahl, F. Hoyle, F. Leeuwen van, F. Matteucci, F. Vilardel, F.R. Ferraro, F.R. Ferraro, G. Bertelli, G. Bono, G. Bono, G. Bono, G. Bono, G. Bono, G. Bono, G. Busso, G. Busso, G. Busso, G. Carraro, G. Carraro, G. Clementini, G. Clementini, G. Clementini, G. Clementini, G. Clementini, G. Fiorentino, G. Fontaine, G. Fontaine, G. Fontaine, G. Kovács, G. Kovács, G. Kovács, G. Kovács, G. Michaud, G. Michaud, G. Michaud, G. Newsham, G. Piotto, G. Piotto, G. Piotto, G. Piotto, G. Piotto, G. Piotto, G. Raimondo, G. Tautvaišienė, G. Wallerstein, G.A. Rutledge, G.E. Langer, G.F. Benedict, G.G. Raffelt, G.G. Raffelt, G.G. Raffelt, G.G. Raffelt, G.H. Bowen, G.H. Rieke, G.H. Smith, G.S. Da Costa, G.S. Da Costa, G.W. Preston, G.W. Preston, H. Shapley, H. Shapley, H.-c. Lee, H.-c. Lee, H.-C. Thomas, H.A. Smith, H.A. Smith, H.A. Smith, H.A. Smith, H.A. Smith, H.A. Smith, H.C. Arp, H.C. Arp, H.J. Newberg, H.J. Newberg, H.J. Newberg, H.J. Rocha-Pinto, H.S. Markov, I. Ferraro, I. Iben Jr., I. Iben Jr., I. Iben Jr., I. Iben Jr., I. McDonald, I. Soszyński, I. Soszyński, I. Soszyński, I.I. Ivans, J. Bonnell, J. Borissova, J. Borissova, J. Faulkner, J. Fernley, J. Fernley, J. Fliri, J. Jurcsik, J. Jurcsik, J. Kałużny, J. Liebert, J. Meléndez, J. Norris, J. Norris, J. Norris, J. Norris, J. Norris, J. Storm, J.-H. Park, J.-W. Lee, J.-W. Lee, J.-W. Lee, J.A. Brown, J.A. Brown, J.A. Johnson, J.A. Johnson, J.A. Johnson, J.E. Norris, J.F. Benage, J.F. Benage Jr., J.F. Le Borgne, J.G. Cohen, J.G. Cohen, J.G. Mengel, J.G. Mengel, J.H. Whitney, J.M. Nemec, J.M. Nemec, J.M. Wheatley, J.O. Petersen, J.P. Cox, J.R. Buchler, J.R. Medeiros De, J.S. Vink, K. Bekki, K. Bekki, K. Despain, K.-P. Schröder, K.A. Venn, K.M. Cudworth, K.S. Boer de, L. Chuzhoy, L. Clewley, L. Clewley, L. Detre, L. Girardi, L. Origlia, L. Origlia, L. Piersanti, L. Sbordone, L. Sbordone, L. Sbordone, L. Searle, L. Siess, L.A. Willson, L.A. Willson, L.A. Willson, L.L. Kiss, L.L. Kiss, L.R. Bedin, M. Aikawa, M. Altmann, M. Altmann, M. Asplund, M. Bellazzini, M. Bellazzini, M. Bellazzini, M. Bellazzini, M. Castellani, M. Castellani, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Catelan, M. Chadid, M. Dall’Ora, M. Del Principe, M. Di Criscienzo, M. Di Criscienzo, M. Grenon, M. Gruberbauer, M. Jerzykiewicz, M. Koleva, M. Livio, M. Monelli, M. Mottini, M. Salaris, M. Salaris, M. Salaris, M. Salaris, M. Salaris, M. Salaris, M. Schwarzschild, M. Schwarzschild, M. Schwarzschild, M. Siegel, M. Siegel, M. Tegmark, M. Tegmark, M.A.C. Perryman, M.D. Reed, M.I. Arifyanto, M.L. Boyer, M.W. Feast, M.W. Feast, N. Itoh, N. Matsunaga, N. Matsunaga, N. Prantzos, N. Soker, N. Soker, N. Soker, N. Soker, N. Soker, N.A. Silbermann, N.B. Suntzeff, N.F. Martin, N.L. D’Cruz, N.L. D’Cruz, P. Bonifacio, P. Bonifacio, P. Demarque, P. Demarque, P. Demarque, P. Maxted, P. Maxted, P. Popowski, P. Popowski, P. Popowski, P. Székely, P. ten Bruggencate, P.B. Stetson, P.B. Stetson, P.B. Stetson, P.B. Stetson, P.B. Stetson, P.G. Judge, P.G. Rathbun, P.M. Frinchaboy, P.T. Oosterhoff, P.T. Oosterhoff, P.V. Baev, P.W. Cole, R. Buonanno, R. Buonanno, R. Buonanno, R. Buonanno, R. Buonanno, R. Buonanno, R. Carrera, R. Contreras, R. Contreras, R. Gratton, R. Santis De, R. Stothers, R. Wilhelm, R. Zinn, R. Zinn, R. Zinn, R. Zinn, R. Zinn, R.-D. Scholz, R.A. Downes, R.A. Gingold, R.A. Gingold, R.A. Ibata, R.A. Ibata, R.B. Stothers, R.C. Peterson, R.C. Peterson, R.C. Peterson, R.C. Peterson, R.C. Peterson, R.C. Peterson, R.C. Peterson, R.D. Cannon, R.G. Deupree, R.G. Gratton, R.G. Gratton, R.G. Gratton, R.M. Cavallo, R.M. Cavallo, R.M. Rich, R.M. Rich, R.M. Rich, R.N. Proctor, R.P. Kraft, R.P. Kudritzki, R.P. Schiavon, R.T. Rood, R.T. Rood, R.T. Rood, R.T. Rood, R.T. Rood, R.T. Rood, R.T. Rood, R.V. Jones, R.V. Jones, R.W. O’Connell, S. Bergh van den, S. Bergh van den, S. Bergh van den, S. Bergh van den, S. Bergh van den, S. Blazhko, S. Cassisi, S. Cassisi, S. Cassisi, S. Cassisi, S. Cassisi, S. Charpinet, S. Charpinet, S. Charpinet, S. Demers, S. Mitake, S. Moehler, S. Moehler, S. Moehler, S. Moehler, S. Moehler, S. Moehler, S. Moehler, S. Moehler, S. Moehler, S. Moehler, S. Ortolani, S. Schuh, S. Yamada, S. Yi, S. Yi, S.-C. Rey, S.-C. Rey, S.-C. Rey, S.-J. Yoon, S.-J. Yoon, S.-W. Lee, S.C. Keller, S.D. Kawaler, S.D. Kawaler, S.E. Browne, S.I. Bailey, S.I. Bailey, S.I. Bailey, S.K. Randall, S.M. Percival, S.R. Majewski, S.R. Majewski, T. Decressin, T. Kinman, T. Lanz, T. Lebzelter, T. Lebzelter, T. Liu, T. Liu, T. Mizerski, T. Suda, T. Suda, T. Tsujimoto, T.A. Kaempf, T.C. Beers, T.D. Kinman, T.D. Kinman, T.E. Armandroff, T.M. Brown, T.M. Brown, T.M. Brown, T.M. Brown, T.M. Brown, T.M. Corwin, T.M. Corwin, T.S. Albada van, T.V. Borkova, U. Heber, V. Belokurov, V. Belokurov, V. Caloi, V. Caloi, V. Caloi, V. Caloi, V. Caloi, V. Caloi, V. Castellani, V. Castellani, V. Castellani, V. Castellani, V. Castellani, V. Castellani, V. Castellani, V. Castellani, V. Castellani, V. Grootel Van, V. Kravtsov, V. Ripepi, V. Silva Aguirre, V.B. Mintsev, W. Landsman, W.A. Dziembowski, W.A. Stygar, W.B. Hubbard, W.B. Landsman, W.E. Harris, W.E. Harris, W.E. Harris, W.F. Altena van, W.R. Brown, W.R. Brown, W.R. Brown, W.V.D. Dixon, W.V.D. Dixon, X. Shi, Y. Ita, Y. Momany, Y. Momany, Y.-W. Lee, Y.-W. Lee, Y.-W. Lee, Y.-W. Lee, Y.-W. Lee, Y.-W. Lee, Y.-W. Lee, Y.-W. Lee, Y.-W. Lee, Z. Han, Z. Ivezic   +646 more
core   +1 more source