Results 31 to 40 of about 2,679,498 (179)

Gaia Data Release 1: Testing parallaxes with local Cepheids and RR Lyrae stars [PDF]

, 2017
Context. Parallaxes for 331 classical Cepheids, 31 Type II Cepheids, and 364 RR Lyrae stars in common between Gaia and the Hipparcos and Tycho-2 catalogues are published in Gaia Data Release 1 (DR1) as part of the Tycho-Gaia Astrometric Solution (TGAS ...
De Bruijne, J.H.J., Luri, X. [0000-0001-5428-9397], Jordi, C. [0000-0001-5495-9602], Rimoldini, L., Garofalo, A., Brown, A.G.A., Lindegren, L., Randich, S. [0000-0003-2438-0899], Klioner, S.A. [0000-0003-4682-7831], Soubiran, C., Prusti, T., González-Marcos, Ana. [0000-0003-4684-659X], Siddiqui, H.I., Evans, D.W., Gallegos Alvarado, Julio, Sartoretti, P., Babusiaux, C., Biermann, M., Aerts, C. [0000-0003-1822-7126], Eyer, L., Muraveva, T., Mignard, F., Molinaro, R., Walton, N.A., Bastian, U., Palmer, M., Marconi, M. [0000-0002-1330-2927], Valette, V., Musella, I. [0000-0001-5909-6615], A. Bello García [0000-0001-8691-3342], Jansen, F., Panem, C., Sarro, L.M. [0000-0002-5622-5191], Szabados, L., Clementini, G., Vallenari, A. [0000-0003-0014-519X], Bailer-Jones, C.A.L., Ripepi, V., Pourbaix, D. [0000-0002-3020-1837], Van Leeuwen, F., Lammers, U., Anderson, R.I.   +41 more
core   +1 more source

First direct detection of an RR Lyrae star conclusively associated with an intermediate-age cluster

Astronomy & Astrophysics
Context. RR Lyrae stars have long been considered unequivocal tracers of old (>10 Gyr) and metal-poor ([Fe/H]
Mateu Cecilia, Cuevas-Otahola Bolivia, Downes Juan José   +2 more
doaj   +1 more source

Pulsating stars in ω Centauri. Near-IR properties and period-luminosity relations

EPJ Web of Conferences, 2017
ω Centauri (NGC 5139) contains many variable stars of different types, including the pulsating type II Cepheids, RR Lyrae and SX Phoenicis stars. We carried out a deep, wide-field, near-infrared (IR) variability survey of ω Cen, using the VISTA telescope.
Navarrete Camila, Catelan Márcio, Contreras Ramos Rodrigo, Alonso-García Javier, Gran Felipe, Dékány István, Minniti Dante   +6 more
doaj   +1 more source

Progress report on the K2 RR Lyrae survey

EPJ Web of Conferences, 2017
We have initiated a large survey with K2, to observe thousands of RR Lyrae stars along the ecliptic. The high photometric precision and the 70-90-day continuous coverage will allow us to investigate the light variation of these galactic structure tracer ...
Szabó Róbert
doaj   +1 more source

Period distributions of irregularly variable RR Lyrae stars [PDF]

Publications of the Astronomical Society of the Pacific, 1981
The occurrence of irregularly variable RR Lyrae stars in four globular clusters and the Draco dwarf spheroidal galaxy are examined in order to determine their period distributions. Two of the clusters are of Oosterhoff type I, M3 and M5, and two are of Oosterhoff type II, M15 and omega-Cen.
openaire   +1 more source

RR Lyrae binary systems in the Galactic bulge

EPJ Web of Conferences, 2017
The possibility of a direct mass measurement of RR Lyrae variable stars in binary systems has remained elusive for many years, due to the apparent paucity of such systems.
Hajdu Gergely, Catelan Márcio
doaj   +1 more source

Revisiting Variable Stars Near Globular Clusters South of −29° Declination

Astronomische Nachrichten, Volume 346, Issue 2, February 2025.
ABSTRACT We review an often‐cited but seldom‐accessed catalogue by Fourcade and Laborde (1966) of 785 variable stars near 47 southern Galactic globular clusters, and recover the locations of 85 stars that were not incorporated into subsequent variable star catalogues and hence have become “lost” to the literature.
Andrew C. Layden, Julia Evangelista, Sakshi Gupta, Mithilesh Mittameda, Eva Mulloy, Sohan I. Muslim, Tiyinoluwa Olushola‐Alao, Akul Rishi   +7 more
wiley   +1 more source

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

Variability in NGC 3201 Giant Stars

The Astronomical Journal, 2023
We present the analysis of 510 light curves in V and I bands of 255 giant stars in the globular cluster NGC 3201. Our aim is to expand the sample of new types of variables reported in a previous study. These variables show a short period ( P _V < 0.6 day)
C. C. Cortés, Á. Llancaqueo Albornoz, S. Villanova, J. A. Ahumada, C. Parisi   +4 more
doaj   +1 more source

Search for the Blazhko Effect in Field RR Lyrae Stars Using LINEAR and ZTF Light Curves

The Astronomical Journal
We analyzed the incidence and properties of RR Lyrae stars that show evidence for amplitude and phase modulation (the so-called Blazhko Effect) in a sample of ∼3000 stars with LINEAR and ZTF light curve data collected during the periods of 2002–2008 and ...
Ema Donev, Željko Ivezić
doaj   +1 more source