... Key words: stars magnetic chemically peculiar stars spectroscopy model atmospheres diffusion element stratification 1 Intro duction Magnetic chemically peculiar (Ap) stars have anomalously strong spectral lines of many chemical species in their spectra. ... An additional difficulty in Ap stars is created by 70 RYABCHIKOVA ET AL. the observed steep abundance gradients in their atmospheres (Wade et al., ... Solid line -- t7250g4.1 model calculated with stratified abundances shown in Fig. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p069.pdf -- 2227.5 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. 81 85 Polar Branches of Activity Waves in HR 1099 and Stellar Dynamo Mo dels Sokoloff D.1 , Lanza A. F.2 , Moss D.3 1 2 3 Department of Physics, Moscow University, Moscow, Russia INAFOsservatorio Astrofisico di Catania, Catania, Italy School of Mathematics, University of Manchester, Manchester, UK Abstract. ... We start from the traditional statement concerning the direction in which the stellar activity wave propagates in the dynamo theory. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p081.pdf -- 88.3 Кб -- 11.08.2011 Похожие документы
... 86 103 A Different Lo ok at Co ol Contact Binaries Stepien K. ё ґ Warsaw University Observatory, Warsaw, Poland Abstract. ... It assumes that W UMatype stars are old ob jects which have passed the mass transfer episode with the mass ratio reversal. ... It is shown that the lack of hydrostatic equilibrium in a common envelope of the contact binary results in a largescale flow of matter from the more massive primary to the secondary. ... The more massive, primary component is a MS star. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p086.pdf -- 775.2 Кб -- 11.08.2011 Похожие документы
... 104 125 Magnetic Field Measurements of CP Stars from Hydrogen Line Cores Kudryavtsev D. O., Romanyuk I. I. Special Astrophysical Observatory, Nizhny Arkhyz, Russia Abstract. We present the results of measurements of magnetic fields of chemically peculiar (CP) stars, performed from the shifts between the circularly polarized components of metal and hydrogen lines (the Babcock method). ... 6 Discussion We measured magnetic fields of 23 stars concurrently from metal and hydrogen lines. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p104.pdf -- 322.1 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. 126 132 Magnetic Fields and Dynamical Evolution of Chemical Sp ots on the Surface of HgMn Stars Hubrig S.1 , SchЁ oller M.2 , Ilyin I.1 , Korhonen H.2 , Gonzґ alez J. F.3 , Cowley C. R.4 , 5 , Arlt R.1 Savanov I. 1 2 3 4 5 Astrophysikalisches ... The aspect of inhomogeneous distribution of some chemical elements over the surfaces of HgMn stars has been, for the first time, discussed by Hubrig & Mathys (1995). ... 128 HUBRIG ET AL. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p126.pdf -- 1216.3 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. ... We discuss a recent detection of a strong, organized magnetic field in the bright, broadline B2V star, HR 5907, using the ESPaDOnS spectropolarimeter on the CFHT as part of the Magnetism in Massive Stars (MiMeS) survey. ... 2010; Rivinius et al., 2010). ... From our longitudinal magnetic field measurements, we confirm this period, which we adopt as the rotational period of this star (see Fig. 1), making it the fastest rotating, nondegenerate magnetic massive star! ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p133.pdf -- 962.2 Кб -- 11.08.2011 Похожие документы
... 137 141 Linear Polarization of HD 37776 Yakunin I. A., Chountonov G. A., Semenko E. A., Romanyuk I. I. Special Astrophysical Observatory, Nizhny Arkhyz, Russia Abstract. The first observations of linear polarization in the lines of a unique Herich star HD 37776 with a complex structure of magnetic field were carried out with the 6m BTA telescope of the SAO RAS using the Main Stellar Spectrograph. ... We hence need to reconsider the model of magnetic field of this star. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p137.pdf -- 168.6 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. ... Almost 14 000 mediumresolution (R 15 000) polarimetric spectra of 65 OF type stars have been obtained since then in the course of three ongoing pro jects: the DAO Magnetic Field Survey, supporting the observations for the CFHT MiMeS survey, and an investigation of the systematic differences between the observed longitudinal field, measured with the H line and metallic lines. ... Figure 2: Longitudinal field measurements of the wellknown magnetic star 2 CVn. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p142.pdf -- 216.8 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. 147 152 The Magnetic Field Structure of CP Stars Glagolevskij Yu. ... It clearly emerges that the configuration of the magnetic dipole sources in the interior of a star determines the structure of the surface field in a calculable way. ... The dipole placed inside a star describes the observable changeability of the magnetic field well, and the structure of a field on the surface from such dipole configuration corresponds well with the distribution of chemical elements. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p147.pdf -- 119.1 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. 153 156 Ab out the Dep endence of the Rotation Velo city of CP Stars on the Magnetic Field Glagolevskij Yu. ... Based on the observational data of the average magnitudes of the surface magnetic field strength Bs for a number of chemically peculiar stars we investigate the dependence of the rotation period on the magnetic field. ... Now the periods of rotation P and the average values of the surface magnetic field Bs are known for more than 50 magnetic stars. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p153.pdf -- 95.3 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. 157 162 Magnetic OBTyp e Stars in Op en Clusters and in the Field Hubrig S.1 , SchЁ oller M.2 , Kharchenko M.1,3 , Ilyin I.1 and the MAGORI collab oration 1 2 3 Astrophysikalisches Institut Potsdam, Potsdam, Germany European Southern Observatory, Garching, Germany Main Astronomical Observatory, Kiev, Ukraine Abstract. ... At present, only very few magnetic Otype stars are known to belong to clusters, whereas the other magnetic Otype stars are field stars. ... 2010). ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p157.pdf -- 115.5 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. 163 170 Magnetic Fields of Herbig Ae/Be Stars Hubrig S.1 , SchЁ oller M.2 , Ilyin I.1 , Gonzґ alez J. F.3 , Cowley C. R.4 , Stelzer B.5 , Curґ M.6 , e 7 , Yudin R.7 Pogo din M. 1 2 ... Recent magnetospheric accretion models for these stars assume a dipolar magnetic field geometry and accreting gas from a circumstellar disk falling ballistically along the field lines onto the stellar surface. ... More evidence for the existence of the field is 166 HUBRIG ET AL. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p163.pdf -- 313.0 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. 171 174 Magnetic Fields of Hot Pulsating Stars Hubrig S.1 , Ilyin I.1 , SchЁ oller M.2 , Morel T.3 , Briquet M.4 , de Cat P. 1 2 3 4 5 5 Astrophysikalisches Institut Potsdam, Potsdam, Germany European Southern Observatory, Garching, Germany Institute for Astrophysics and Geophysics, Liґ University, Liґ ege ege, Belgium Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Leuven, Belgium Koninklijke Sterrenwacht van BelgiЁ Brussel, Belgium e, Abstract. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p171.pdf -- 126.1 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. ... Key words: stars: premainsequence stars: atmospheres stars: individual: HD 101412 stars: magnetic fields stars: rotation stars: variables: general 1 Intro duction In our previous studies we reported detections at a level higher than 3 for three out of seven Herbig Ae stars observed with the lowresolution spectropolarimeter FORS1 at the VLT (Hubrig et al., ... This is the first time the presence of element spots is detected on the surface of a Herbig Ae star. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p175.pdf -- 261.7 Кб -- 11.08.2011 Похожие документы
... 179 187 Magnetic Braking of the Main Comp onent of 1 Ori C Balega Yu. ... From the high resolution spectra of the binary collected with the 6m telescope we succeeded to separate weak lines of the secondary component and to measure its rotation velocity. ... In the paper we present the high spectral resolution study of 1 Ori C, which was performed to specify the fundamental parameters of the components and to estimate the influence of the magnetic field on the evolution of the star. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p179.pdf -- 259.5 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. 188 198 Magnetic Field in XRay Binary Cygnus X1 Karitskaya E. A.1 , Bo chkarev N. G.2 , Hubrig S.3 , Gnedin Yu. ... The value of the mean longitudinal magnetic field in the optical component (O9.7 Iab supergiant) changes regularly with the orbital phase reaching its maximum of 130 G ( 20 G). ... 2008). ... Figure 1 shows the mean longitudinal magnetic field of the Cyg X1 optical component Bz versus the orbital phase for 2007, for 2008, and for 2007 and 2008 together. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p188.pdf -- 989.7 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. ... The V /I circular polarization spectra obtained during our spectropolarimetric FORS1 VLT observations have variable sloped continuum components not belonging to the ob ject. ... 2004; Bagnulo et al., 2002, 2006) which usually do not have significant interstellar or intrinsic linear polarization, but a rather strong Bz = 500 2000 G. In contrast, Cyg X1 has a weaker Bz and a strong interstellar/circumstellar linear polarization. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p199.pdf -- 337.6 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. 215 219 Constant Magnetic Field of 1 CMa: Geometry or Slow Rotation? ... We report recent observations of the sharplined magnetic Cep pulsator 1 CMa (= HD 46328). ... The pro jected rotational velocity is constrained to be v sin i 15 km/s. 2 Magnetic Field and Rotational Perio d Longitudinal magnetic field measurements were inferred using the LeastSquares Deconvolution (LSD) with a line mask carefully customized to the spectrum of 1 CMa. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p215.pdf -- 218.1 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. ... Key words: instrumentation: polarimetry magnetic fields stars: individual (WD1658441) stars: magnetic fields stars: white dwarfs 1 Intro duction Lowresolution spectropolarimeters are intended mainly for spectropolarimetric studies of faint ob jects. ... Magnetism of white dwarfs. ... 223 Figure 4: Spectrum (upper plot) and circular polarization (lower plot) of the zero polarization standard maximal rotationally modulated longitudinal magnetic field. ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p220.pdf -- 161.0 Кб -- 11.08.2011 Похожие документы
Magnetic Stars, 2011, pp. ... In this paper we describe the reduction and analysis of the data, the constraints obtained on any magnetic field present in the stellar photosphere, and the variability of photospheric and wind lines. Key words: stars: early type stars: supergiants stars: magnetic fields stars: winds spectropolarimetry 1 Intro duction Rigel: a blue supergiant, the closest and most readily studied Type II supernova progenitor, and a known Cygni variable. ... 2008). ...
[
Текст
]
Ссылки http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p224.pdf -- 203.7 Кб -- 11.08.2011 Похожие документы