WHEN DO STARS IN 47 TUCANAE LOSE THEIR MASS?
نویسندگان
چکیده
منابع مشابه
Heavy Element Abundances in AGB stars in 47 Tucanae
This research forms part of an investigation into heavy element abundances in Asymptotic Giant Branch (AGB) stars in various stellar environments. Seven giant stars in the southern globular cluster 47 Tuc have been observed using the Anglo-Australian Telescope. Abundances for five sand rprocess elements have been determined: the light s-process elements, Y and Zr; the heavy s-process elements, ...
متن کاملLithium observations in 47 Tucanae
We present high resolution observations (FWHM=15 km s−1) of the Li region in 5 stars belonging to the old (≈14 Gyrs), metal rich ([Fe/H]≈-0.7) globular cluster 47 Tuc. At the ESO NTT telescope we obtained EMMI spectra for three V∼17.4 magnitude stars located at the turnoff with Teff on the Spite plateau. In two of the turnoff stars the lithium line is clearly detected and the mean lithium conte...
متن کاملMillisecond Radio Pulsars in 47 Tucanae
We review the properties of the 22 millisecond radio pulsars currently known in the globular cluster 47 Tucanae, and their implications for the mass and gas content of the cluster. Further details can be found in the publications from this project to date (Camilo et al. 2000; Freire 2000; Freire et al. 2001a,b; Freire et al. 2003). Throughout the review, we look ahead to the future results anti...
متن کاملTuc ASTRONOMY AND ASTROPHYSICS SX Phœnicis Stars in the Core of 47 Tucanae ⋆
We present new results on five of six known SX Phoenicis stars in the core of the globular cluster 47 Tu-canae. We give interpretations of the light curves in the V and I bands from 8.3 days of observations with the Hubble Space Telescope near the core of 47 Tuc. The most evolved SX Phe star in the cluster is a double-mode pulsator (V2) and we determine its mass to be (1.54 ± 0.05) M ⊙ from its...
متن کاملTiming the millisecond pulsars in 47 Tucanae
In the last ten years 20 millisecond pulsars have been discovered in the globular cluster 47 Tucanae. Hitherto, only three of these pulsars had published timing solutions. Here we improve upon these three and present 12 new solutions. These measurements can be used to determine a variety of physical properties of the pulsars and of the cluster. The 15 pulsars have positions determined with typi...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2015
ISSN: 1538-4357
DOI: 10.1088/0004-637x/810/2/127