Abundance trend with condensation temperature for stars with different Galactic birth places
نویسندگان
چکیده
منابع مشابه
Condensation temperature trends among stars with planets
Results from detailed spectroscopic analyses of stars hosting massive planets are employed to search for trends between abundances and condensation temperatures. The elements C, S, Na, Mg, Al, Ca, Sc, Ti, V, Cr, Mn, Fe, Ni and Zn are included in the analysis of 64 stars with planets and 33 comparison stars. No significant trends are evident in the data. This null result suggests that accretion ...
متن کاملThe Neon Abundance of Galactic Wolf–rayet Stars
The fast, dense winds which characterize Wolf-Rayet (WR) stars obscure their underlying cores, and complicate the verification of evolving core and nucleosynthesis models. Core evolution can be probed by measuring abundances of wind-borne nuclear processed elements, partially overcoming this limitation. Using ground-based mid-infrared spectroscopy and the 12.81μm [Ne ii] emission line measured ...
متن کاملGalactic orbits of stars with planets ⋆
We have reconstructed the galactic orbits of the parent stars of exo-planets. For comparison, we have recalculated the galactic orbits of stars from the Edvardsson et al. (1993) catalog. A comparison between the two samples indicates that stars with planets are not kinematically peculiar. At each perigalactic distance stars with planets have a metallicity systematically larger than the average ...
متن کاملThe Abundance Distribution of Stars with Planets
We present the results of a uniform, high-precision spectroscopic metallicity study of 136 G-type stars from the Anglo-Australian Planet Search, 20 of which are known to harbour extrasolar planets (as at July 2005). Abundances in Fe, C, Na, Al, Si, Ca, Ti and Ni are presented, along with Strömgen photometric metallicities. This study is one of several recent studies examining the metallicities ...
متن کاملParent stars of extrasolar planets – XI. Trends with condensation temperature revisited
We report the results of abundance analyses of new samples of stars with planets and stars without detected planets. We employ these data to compare abundance–condensation temperature trends in both samples. We find that stars with planets have more negative trends. In addition, the more metal-rich stars with planets display the most negative trends. These results confirm and extend the finding...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2016
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201628883