Results 51 to 60 of about 363 (172)

Period distributions of irregularly variable RR Lyrae stars [PDF]

open access: yesPublications 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

RADIATIVE TRANSFER EFFECTS ON THE COLORS OF RR LYRAE STARS

open access: yesOdessa Astronomical Publications, 2017
The methods of Davis and Cox (1980), are applied to a series of models described by Bono and Stellingwerf  (1994) to deter-mine the colors of RR Lyrae stars.
C. G. Davis
doaj   +1 more source

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

open access: yesThe 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

RR Lyrae Mid-infrared Period–Luminosity–Metallicity and Period–Wesenheit–Metallicity Relations Based on Gaia DR3 Parallaxes

open access: yesThe Astrophysical Journal, 2023
We present new empirical infrared period–luminosity–metallicity (PLZ) and period–Wesenheit–metallicity (PWZ) relations for RR Lyae based on the latest Gaia Early Data Release 3 (EDR3) parallaxes.
Joseph P. Mullen   +10 more
doaj   +1 more source

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

open access: yesThe Astronomical Journal, 2006
68 pages, 26 figures, 9 tables, accepted to ...
Kinemuchi, K.   +4 more
openaire   +2 more sources

Photometric Metallicity and Distance Estimates for ∼136,000 RR Lyrae Stars from Gaia Data Release 3

open access: yesThe Astrophysical Journal, 2023
We present a sample of 135,873 RR Lyrae stars (RRLs) with precise photometric metallicity and distance estimates from our newly calibrated P – ϕ _31 – R _21 –[Fe/H]/ P – R _21 –[Fe/H] and G -band absolute magnitude–metallicity relations.
Xin-Yi Li   +4 more
doaj   +1 more source

Search of Short-Period Pulsating Variables(I) [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1996
CCD differential photometry was carried out for seven stars in the "New Catalogue of Suspected Variable Stars" in order to discover new short-period pulsating variables such as low and high amplitude δ Scuti stars and RR Lyrae stars.
Chulhee Kim, Nam-Kyu Park
doaj  

Highlights on eclipsing binary variables from Araucaria Project

open access: yesEPJ Web of Conferences, 2015
The Araucaria Project, which main goal is to provide precise determination of the cosmic distance scale, has recently made a set of discoveries involving variable stars in binary systems. Among these discoveries we highlight three: 1% precise measurement
Karczmarek Paulina   +10 more
doaj   +1 more source

Pulsating stars in the VMC survey

open access: yesEPJ Web of Conferences, 2017
The VISTA survey of the Magellanic Clouds system (VMC) began observations in 2009 and since then, it has collected multi-epoch data at Ks and in addition multi-band data in Y and J for a wide range of stellar populations across the Magellanic system ...
Cioni Maria-Rosa L.   +6 more
doaj   +1 more source

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

open access: yesThe 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   +5 more
doaj   +1 more source

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