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Unmixing the Galactic halo with RR Lyrae tagging
... clusters. The RR Lyrae are also brighter in OoII clusters, possibly due to a combination of evolu- tionary effects ...to the RR Lyrae in OoI systems ...of the proposed ... See full document
12
A Near infrared RR Lyrae Census along the Southern Galactic Plane: The Milky Way's Stellar Fossil Brought to Light
... that the RPEF may well be different in the halo, the bulge and the disk, depending on how their constituent stars are distributed in terms of the aforemen- tioned physical ... See full document
22
Discovery of similar to 9000 new RR Lyrae in the southern Catalina surveys
... if the Galactic tides are strong enough, the infalling dwarf satellites are pulled apart leaving trails of stars that can be recognized as coherent overdensities in the halo ...2001). ... See full document
16
The Period Luminosity Relation of RR Lyrae Stars in the SDSS Photometric System
... given the scientific community an unprecedented chance to systematically map a large area of the sky, using its own special five-band filter sys- ...In the process, an overwhelming amount of data has ... See full document
7
Stellar Archeology in the Galactic Halo with Ultra Faint Dwarfs VII Hercules
... contain RR Lyrae stars that conform to the subdivision into Oosterhoff types I (Oo I) and II (OoII; Oosterhoff 1939) 11 observed for field and cluster MW vari- ...far, the only exception among ... See full document
11
The Globular Cluster NGC 6402 (M14) II Variable Stars
... for Galactic GCs, as dwarf spheroidal (dSph) satellite galaxies and their respective GCs fall preferentially on the Ooster- hoff gap region, thus being called “Oosterhoff-intermediate” ...(OoInt). ... See full document
19
The VVV Survey RR Lyrae Population in the Galactic Center Region
... establishing the kinematics of the old and metal-poor population in the Galactic Center ...for the RRab variable stars, and no indication of signi fi cant rotation. The PM ... See full document
13
Stellar archaeology in the galactic halo with the ultra faint dwarfs VI URSA MAJOR II
... for the galaxy a distance of 34 kpc, which taken at face value would support their suggestion that UMa II is the progenitor of the Orphan ...However, the N-body simulations by Sales et ... See full document
9
Gauging the Helium Abundance of the Galactic Bulge RR Lyrae Stars
... RR Lyrae are very old variable stars, with ages typically > 11 Gyr ( ...Within the Milky Way ( MW ) , RR Lyrae stars are typical members of Galactic globular clusters ... See full document
5
PROBING THE OUTER GALACTIC HALO WITH RR LYRAE FROM THE CATALINA SURVEYS
... investigate the dependence of completeness on the number of observations in a field, we combined the 134 fields into four groups: fields observed less than 100 times, fields observed between 100 and ... See full document
20
Properties of RR Lyrae stars in the inner regions of the Large Magellanic Cloud III Near infrared study
... For the ISPI ob- servations the observing strategy included alternating between the object and a nearby ...both the “object” and the “sky” pointings, we jittered within ∼20 arcsec to ... See full document
10
On a New Theoretical Framework for RR Lyrae Stars II Mid infrared Period Luminosity Metallicity Relations
... to the IRAC bands, but we elected to keep the WISE and IRAC photometry separate in this paper for two main ...of the stars in our sample, adding in WISE photometry degrades the quality of our ... See full document
19
New RR Lyrae variables in binary systems
... few RR Lyrae (RRL) stars have been known to reside in binary ...in the OGLE-III Galactic bulge data. Our approach consists in the search for evidence of the light-travel time ... See full document
5
Supervised detection of anomalous light curves in massive astronomical catalogs
... of the galaxies that are close ...For the former case the authors create Mixed-error matrix factorization (MEMF), an unsupervised algorithm that explores subspaces of the ...of the data ... See full document
84
Chemical trends in the Galactic halo from APOGEE data
... out the previous evaluations by considering the mean ratios weighted with the measurement errors – the resulting trends are qualitatively similar to the median ratio ...if ... See full document
15
Pulsation period changes as a tool to identify pre zero age horizontal branch stars
... shows the expected pe- riod change rate distribution for an M3-like input mass dis- ...of the pre-ZAHB stars have period change rates contained in the [−1, 0] d/Myr range, meaning that evolution ... See full document
6
Variable stars in the globular cluster M 28 (NGC 6626)
... by the Ministry for the Economy, Development, and Tourism’s Programa Inicativa Científica Milenio through grant P07-021-F, awarded to The Milky Way Millennium Nucleus; by Proyecto Basal PFB-06 / ... See full document
8
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 ...investigate the early formation and the spatial structure of the Galactic ... See full document
14
NGC 5694: Another foster son of the galactic halo
... in the massive stars through hydrostatic (for O and Mg) and explosive (for Si, Ca and Ti) nucleosynthesis by Type II SNe, while iron is produced also by Type Ia SNe, the [α/Fe] ratio is commonly adopted as ... See full document
14
The Horizontal Branch of NGC 1851: Constraints from its RR Lyrae Variables
... from the BaSTI stellar library (Pietrinferni et ...also the same ones that Gratton et ...mixture, with [Fe/H] = −1.31 dex and Y = 0.248. The HB tracks were interpolated among the models ... See full document
10
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