An abundance analysis of a chemically peculiar B star – JL 87
نویسندگان
چکیده
منابع مشابه
Orbital elements of binary systems with a chemically peculiar star
When binary systems with a chemically peculiar (CP) star are compared with normal-star binary systems, they present: a lower incidence, a deficiency of short periods, rather eccentric orbits, and companions of low mass. Unfortunately these results are based on a relatively small (∼ 50) number of CP-star binary systems with known orbital parameters and a similar analysis has not yet been carried...
متن کاملHVS 7 : a chemically peculiar hyper - velocity star ⋆
Context. Hyper-velocity stars are suggested to originate from the dynamical interaction of binary stars with the supermassive black hole in the Galactic centre (GC), which accelerates one component of the binary to beyond the Galactic escape velocity. Aims. The evolutionary status and GC origin of the hyper-velocity star SDSS J113312.12+010824.9 (aka HVS 7) is constrained from a detailed study ...
متن کاملMagnesium abundance in main sequence B-type and magnetic chemically peculiar stars
The abundance of magnesium for a sample of 19 main sequence B-type and 41 magnetic chemically peculiar stars has been derived by spectrum synthesis analysis of the Mgii 448.1 nm line under the LTE assumption. The logarithm of the average Mg abundance for the main sequence stars is log (N(Mgii)/N(Tot)) =−4.28±0.19. Comparing magnetic chemically peculiar (Cp) and main sequence stars with equal ef...
متن کاملHE 0107 − 5240 , A Chemically Ancient Star . I . A Detailed Abundance Analysis
We report a detailed abundance analysis for HE 0107−5240, a halo giant with [Fe/H]NLTE = −5.3. This star was discovered in the course of follow-up mediumresolution spectroscopy of extremely metal-poor candidates selected from the digitized Hamburg/ESO objective-prism survey. On the basis of high-resolution VLT/UVES spectra, we derive abundances for 8 elements (C, N, Na, Mg, Ca, Ti, Fe, and Ni),...
متن کاملMultiplicity of chemically peculiar stars
Recently, with the goal to study multiplicity of chemically peculiar stars, we carried out a survey of 40 stars using diffraction limited near infrared (IR) imaging with NAOS-CONICA (NACO) at the VLT. Here, we announce the detection of 27 near IR companion candidates around 25 late B-type chemically peculiar stars exhibiting strong overabundances of the chemical elements Hg and Mn in their atmo...
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: 2007
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20066360