Massive Stars
Massive stars in the SDSS IV/APOGEE SURVEY I OB stars
... hot, massive stars, from O-type dwarfs to their evolved counterparts ( blue super-giants, hyper-giants, and / or Wolf-Rayet stars ) is of utmost importance to understand star formation and further ...
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The multiplicity of massive stars in the Orion Nebula Cluster as seen with long baseline interferometry
... The program was granted time in the course of the ESO pro- gram 086.C-0193 (P.I.: Grellmann). We also included in our analysis the previous observations of θ 1 Ori C and D from the observing run 078.C-0360 (P.I.: Kraus). ...
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On magnetic equilibria in barotropic stars
... From a theoretical point of view, the persistence of magnetic fi elds in massive stars and compact remnants motivates the interest in what physical conditions are involved in sustaining such equilibria. Both ...
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The influence of multiple stars on the high mass stellar initial mass function and age dating of young massive star clusters
... most stars are in binary or higher order multiple ...multiple massive stars is investigated by taking into account the stellar evolution and photometrically determined system ...all stars and ...
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Variations in the lithium abundances of turn off stars in the globular cluster 47 Tucanae
... IM-AGB stars or the winds of massive ...IM-AGB stars were the main polluters the current mass of the clusters should be dominated by stellar ...of massive stars as a more attractive ...
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Massive open star clusters using the VVV survey II Discovery of six clusters with Wolf Rayet stars
... observable massive stars with initial masses equal to or greater than 60 M decreases with time, and clusters with an age of 5 Myr can already have a mass function showing an abrupt drop at high ...sequence ...
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Formation of multiple populations in globular clusters: another possible scenario
... PSs. Stars of the first and second generations are represented as red and orange, ...represent massive, intermediate-mass, and low-mass stars, ...the stars of the different generations, and the ...
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On a New Theoretical Framework for RR Lyrae Stars II Mid infrared Period Luminosity Metallicity Relations
... intermediate-mass stars cross the so-called Cepheid instability strip ( a region of the HR diagram in which stellar atmospheres are pulsationally stable ) ...
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Bright globular clusters in NGC 5128: the missing link between young massive clusters and evolved massive objects
... The measured radial velocities for all the stars observed dur- ing the 2002 run with UVES are given in Col. 7 of Table 2. They were measured by cross-correlating each Fourier-filtered stellar spectrum against each ...
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The nature of assembly bias II Halo spin
... In this letter we will investigate the prevalence of the as- sembly bias with the proposed redefinition of an overdensity peak height of Paper I using the dimensionless spin param- eter. Works by Bett et al. (2007, ...
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Constraints on Helium Enhancement in the Globular Cluster M3 (Ngc 5272): The Horizontal Branch Test
... HB stars is always sharply peaked, and that the color spread routinely observed in GC CMDs is instead due to internal variations in the helium abundance ...
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Pulsating stars in ω Centauri Near IR properties and period luminosity relations
... (RRL) stars ([16]); 74 SX Phoenicis (SX Phe), the greatest number found in a globular cluster ([18, 26]); and seven type II Cepheids (T2Cs), among others variability ...
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YOUNG STELLAR CLUSTERS CONTAINING MASSIVE YOUNG STELLAR OBJECTS IN THE VVV SURVEY
... non-variable stars is estimated to be below ...saturated stars, the objects with close companions ( blending ) , and those with large photometric errors, ten in total, are ...
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Instability of magnetic equilibria in barotropic stars
... in stars that are barotropic, since they are not stably ...these stars, several authors (Tomimura & Eriguchi 2005; Yoshida, Yoshida & Eriguchi 2006; Akg¨un & Wasserman 2008; Haskell et ...the ...
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Deep census of variable stars in a VLT/VIMOS field in Carina
... Reference frames were constructed by combining 8 or 9 of the highest quality individual images (depending on the quadrant). The profile photometry for the reference frame was extracted with DAOPHOT/ALLSTAR (Stetson ...
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Automatic survey invariant classification of variable stars
... Digital synoptic sky surveys enabled the emergence of the time domain research field in astronomy. Automated telescopes allow surveying large areas of the sky repeatedly in short scales of time. While prior star catalogs ...
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Deep multi survey classification of variable stars
... Variable stars are crucial for studying and understanding the galaxy and the ...able stars [Benavente et ...Variable stars such as RR Lyrae, Mira, and Cepheids are important for distant ladder ...
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Clustering based feature learning on variable stars
... Most of the automatic classification tools coming from the Machine Learning commu- nity are very effective in the sense that they can produce high accuracy results and work very fast in the classification stage (after ...
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Automatic classification of poorly sampled variable stars
... Automatic classification of lightcurves success depends on two important and sepa- rated aspects of the process. First is the type of classifier being used. There are many different supervised classification algorithms ...
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Cell free Massive MIMO en sistemas 5G
... Free Massive MIMO se basa en el despliegue de forma aleatoria de un gran número de pequeñas estaciones base conocidas como Access Point sobre un área deter- ...Free Massive MIMO derivada de Cell Free con la ...
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