Detection of magnetic fields in He-rich early B-type stars using HARPSpol
نویسندگان
چکیده
منابع مشابه
Properties of He - rich stars
We present an abundance analysis of light elements in the most massive chemically peculiar (CP) stars, He-rich stars. The analysis is based on both low and high-resolution observations collected at ESO, La Silla, Chile in the optical region and includes 6 standard and 21 He-rich stars. Light element abundances display a diverse pattern from under-solar up to above-solar values. Carbon is found ...
متن کاملDiscovery of magnetic fields in three He variable Bp stars with He and Si spots
stars: magnetic fields It is essential for the understanding of stellar structure models of high mass stars to explain why constant stars, non-pulsating chemically peculiar hot Bp stars and pulsating stars co-exist in the slowly pulsating B stars and β Cephei instability strips. We have conducted a search for magnetic fields in the four Bp stars HD 55522, HD 105382, HD 131120, and HD 138769 whi...
متن کاملASTROPHYSICS Properties of He - rich stars
We present a study of helium rich atmospheres in the interval He/H 0.1–1.0 as derived from fully consistent model computations for effective temperature (from 15000K up to 32000K) and surface gravity (log g=3.5 and 4.0). Also the basic diagnostic tools are re-examined, particularly, broad-band UBV and intermediate photometric systems, hydrogen line profiles, continuum fluxes and helium equivale...
متن کاملDetection of atmospheric velocity fields in A-type stars
High signal-to-noise spectra with spectral resolution of more than 105 have been obtained of one normal B9.5V, one normal A1V, two Am stars, and two HgMn B stars having v sin i less than 6 km s−1. These spectra are modeled with LTE line profile synthesis to test the extent to which the spectrum of each star can be modeled correctly with a single set of parameters Te, log g, chemical abundances,...
متن کاملCatalogue of averaged stellar effective magnetic fields . I . Chemically peculiar A and B type stars
This paper presents the catalogue and the method of determination of averaged quadratic effective magnetic fields B e for 596 main sequence and giant stars. The catalogue is based on measurements of the stellar effective (or mean longitudinal) magnetic field strengths B e , which were compiled from the existing literature. We analysed the properties of 352 chemically peculiar A and B stars in t...
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: 2018
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201833171