We present preliminary results of a study aimed at identifying and characterizing the Asymptotic Giant Branch (AGB) stars in the outer Galaxy using the color-color diagram (CCD) that combines the Spitzer Space Telescope and 2MASS photometry: K_s - [8.0] vs. K_s - [24]. Our initial ...
E Pfahl,S Rappaport,AP Podsiadlowski - 《Astrophysical Journal Letters》 被引量: 74发表: 2002年 Population synthesis of double neutron stars Using the StarTrack binary population synthesis code we model the population of double neutron stars in the Galaxy. We include a detailed treatment of the...
The purpose of binary population synthesis is to detechne, as far as possible, the consistency of our theoretical understanding of single and binary stars with the statistics of stars in our galaxy (and ultimately other galaxies). It is important to fit all types of stellar systems simulta- ...
VizieR Online Data Catalog: Population model of binary stars in the Galaxy (Tutukov+, 2002) A comparative study of the population of the galactic binary stars is performed for two modes of star formation: star formation at a constant rate over 10y... AV Tutukov,LR Yungelson - 《Vizier ...
dates back to the work of Einstein in 19361. In this pioneering work he considered the case where both the lens and the magnified background source were stars in our Galaxy. Einstein concluded that the deflection angles were too small to be resolved with astronomical instruments. It was Zwicky...
According to our calculations 70% of all Be stars must have a white dwarf. The white dwarfs in these systems should be hot enough with the surface temperature distribution peaking at 10000–20000 K. Their detection is possible during the period of the lack of Be star envelope by the ...
Our results for the CLEs are consistent with a two-phase scenario where their inner parts formed by an early and coeval dissipative collapse with a consequent burst of star formation and further quenching, whereas the outer parts continued their assembly, likely by dry mergers. We also discuss ...
The only information at present relates to our Galaxy. The EW binaries are very common in the disk-population. The estimate based on the OGLE-I pencil-beam search volume gave the density as high as 1/130 among late-A to early-K MS stars, a number consistent with some old open clusters...
a r X i v : 0 7 0 9 . 2 7 1 1 v 1 [ a s t r o - p h ] 1 7 S e p 2 0 0 7 Populationsynthesisatshortwavelengthsand spectrophotometricdiagnostictoolsforgalaxy evolution AlbertoBuzzoni 1 ,EmanueleBertone 2 ,MiguelCh´avez 2,3 ,andLinoH. Rodr´ıguez-Merino 2 1 INAF...
The spin-down, induced by dipole losses and the interaction with the ambient medium, is tracked together with the dynamical evolution in the Galactic potential, allowing for the determination of the fraction of stars which are, at present, in each of the four possible stages: Ejector, Propeller...