منابع مشابه
The magnetic Bp star 36 Lyncis II . A spectroscopic analysis of its co - rotating disk
We report on the physical properties of the disk-like structure of B8 IIIp star 36 Lyncis from line syntheses of phase-resolved, high resolution spectra obtained from the International Ultraviolet Explorer archives and from newly obtained ground-based spectra of the Hα absorption profile. This disk is highly inclined to the rotational axis and betrays its existence every half rotation cycle as ...
متن کاملDiscovery of X - ray flaring on the magnetic Bp - star σ Ori
We report the detection of an X-ray flare on the Bp star σ Ori E with the ROSAT high resolution imager (HRI). The flare is shown to have likely occurred on the early-type star, rather than on an hypothesized late-type companion. We derive flare parameters such as total energy release, coarse estimates of size and density, and also present arguments for a magnetic origin of the flare. We place o...
متن کاملThe variations of the Bp star HD 137509 ? , ? ?
A refined value P = (4.4916± 0.0002) d is derived for the rotation period of the Bp star HD 137509, from the simultaneous consideration of photometric data recorded in the Geneva system and of measurements of the mean longitudinal magnetic field and of the crossover. The variations of the magnetic field (one of the most intense fields known in an Ap or Bp star) show the signature of a strong qu...
متن کاملModel atmospheres of magnetic chemically peculiar stars A remarkable strong - field Bp SiCrFe star HD 137509
Context. In the last few years we have developed stellar model atmospheres which included effects of anomalous abundances and strong magnetic field. In particular, the full treatment of anomalous Zeeman splitting and polarized radiative transfer were introduced in the model atmosphere calculations for the first time. The influence of the magnetic field on the model atmosphere structure and vari...
متن کاملDetection of variable Si II , Mn II and Fe II emission lines in the magnetic Bp star a Centauri ⋆
Context. The nature of non-variable high-excitation emission lines detected in the optical spectra of normal late-B type and chemically peculiar HgMn and PGa stars is still poorly understood. Aims. To better understand the origin of the weak emission lines in B type stars it is especially important to investigate the spectra of a variety of stars to search for correlations between the emergence...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2006
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20054759