[PDF] Top 20 Physical parameters of three field RR Lyrae stars
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Physical parameters of three field RR Lyrae stars
... RRL stars as good distance indicators. Long time series of RRL stars produced by space missions have shown to be very informative on many of the most detailed pulsational properties of ... See full document
10
The RR Lyrae period luminosity (Pseudo) color and period color (Pseudo)color relations in the Stromgren photometric system: Theoretical calibration
... Because of the special characteristics of the Stro¨mgren (1963) uvby passband system, it represents an invaluable tool in the study of the physical parameters of stars, ... See full document
11
CCD Photometry of the RR LYRAE Stars in NGC 4147
... results of CCD V and R photometry of the RR Lyrae stars known in NGC ...periodicities of most variables are revised and new ephemerides are ...V6. Three previously ... See full document
13
Variable stars in large magellanic cloud globular clusters II NGC 1786
... series of papers studying the variable stars in Large Magellanic Cloud globular ...goal of this series is to study how RR Lyrae stars in Oosterhoff-intermediate systems compare ... See full document
11
CCD Photometry of the Globular Cluster M15: RR Lyrae Fourier Decomposition and Physical Parameters
... collections of light curves of RR Lyrae stars in M15 can be found in Sandage, Katem, & Sandage (1981) and Silbermann & Smith (1995); these au- thors offer UBV for 60 ... See full document
13
TIME SERIES PHOTOMETRY OF GLOBULAR CLUSTERS: M62 (NGC 6266), THE MOST RR LYRAE RICH GLOBULAR CLUSTER IN THE GALAXY?
... consists of 168 images per filter, obtained with the Warsaw ...telescope of the Cerro Tololo Inter-American Observatory, in two separate runs over the time span of 3 ...variable stars was the ... See full document
21
Properties of RR Lyrae stars in the inner regions of the Large Magellanic Cloud III Near infrared study
... Two stars, MACHO ...than three sigma away from the mean period-[Fe/H] trend. The re- mainder of the stars present a wide range in periods but only a narrow range in ...results of ... See full document
10
VARIABLE STARS IN NGC 4147 REVISITED: RR LYRAE STARS NEW CCD VI PHOTHOMETRY AND PHYSICAL PARAMETERS
... the field of the cluster near the central ...data of SCS05 taken between 1983 and 2003 by an assortment of instruments, the data from AF04 taken during 24 nights between January and July, ... See full document
15
Physical parameters of seven field RR Lyrae Stars in bootes
... sources of uncertainty in ∆S, we have to note that the transformation of this ob- servational parameter into [Fe/H] encounters serious problems: the high dispersion abundance determina- tions in RR ... See full document
13
Chemical Compositions of Field and Globular Cluster RR Lyrae Stars I NGC 3201
... , RR Lyrae stars ( RRL ) have played a fundamental role as tracers of old ( t > 10 Gyr ) stellar ...amplitude of their optical light ...structure of the Galactic bulge ( ... See full document
14
The Globular Cluster NGC 6402 (M14) II Variable Stars
... sists of ∼137 images per filter, obtained using the ...variable stars. We identified 130 variables, 8 of which are new ...comprised of 56 ab-type RR Lyrae stars, 54 c-type ... See full document
19
Pulsation period changes as a tool to identify pre zero age horizontal branch stars
... Low-mass stars, after exhausting their central hydrogen sup- ply, develop increasingly more massive helium cores due to the continued supply of He-rich material from the H-burning shell that surrounds ... See full document
6
A deep near infrared view of the Galactic globular cluster 2 MASS GC 02
... these stars could in principle also be field RR Lyrae ...RRab stars (see below) are extremely unusual for field RR Lyrae of moderately high metal- licity, ... See full document
7
Characterization of the VVV Survey RR Lyrae Population across the Southern Galactic Plane
... map of the Milky Way together with the distribution of the RRab ...bulge RR Lyrae population appears to extend from ℓ∼ 344 ° , beyond which the excess de fi ned by the bulge RR ... See full document
10
Variable stars in large magellanic cloud globular clusters I NGC 1466
... set of images in order to obtain instrumental magnitudes for each ...Observations of the Landolt standard fields PG0231, RU149, SA95, and SA98 (Landolt 1992) were used to determine an initial transformation ... See full document
14
Analysis of Select RR Lyrae Stars in Serpens from uvby$ \beta$ Photoelectric Photometry
... phase of minimum. The occurrence of maximum light happens a little bit before, imply- ing a need for correction of the period but since the change is so small, we preferred to leave it as it ...time ... See full document
9
HD 115520, a new $ \delta$ Scuti star
... confirmation of the suspected variability of the star; and once this was accomplished, it became the determination of its nature and its physical ...amplitude of variation, suggested ... See full document
8
On the Impact of Helium Content on the RR Lyrae Distance Scale
... diagrams of low-mass helium burning stellar ...and three different helium ...crossing of the RRL ...display three HB evolutionary models covering the mass range typical of RRLs located ... See full document
7
New RR Lyrae variables in binary systems
... cent of RRab stars show the Blazhko effect (Jurcsik et ...all of the Blazhko binaries have necessarily been missed, and so the total binary fraction must be closer to 2 per cent than to 1 per ... See full document
5
uvbyβ Photometry of the RR Lyrae Star AT And
... the stars are in the F spectral type ...relation of ∆S = 10 [Sp(H) – Sp(Ca II )] he reports for AT And a ∆S value of 3 for spectral types at minimum ...RRAB stars through [Fe/H] = ... See full document
7
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