An abundance analysis of AK Sco, a Herbig Ae SB2 system with a magnetic component

2018 ◽  
Vol 14 (A30) ◽  
pp. 133-133
Author(s):  
Swetlana Hubrig ◽  
Fiorella Castelli ◽  
Silva P. Järvinen
Keyword(s):  
Magnetic Field ◽  
Special Interest ◽  
Weak Magnetic Field ◽  
Main Sequence ◽  
Secondary Component ◽  
Magnetic Component ◽  
Ultraviolet Excess ◽  
High Eccentricity ◽  
Solar Abundance ◽  
Herbig Ae Stars

AbstractAK Sco is an SB2 system formed by two nearly identical Herbig Ae stars, with Teff = 6500K and log g = 4.5, surrounded by a circumbinary disk. This actively accreting system is of special interest among the pre-main-sequence binaries because of its prominent ultraviolet excess and the high eccentricity of its orbit. Moreover, recent spectropolarimetric observations using HARPSpol indicate the presence of a weak magnetic field in the secondary component (Järvinen et al. 2018). An abundance analysis of both components has shown that all elements have a solar abundance in the two stars, except for Li and Ba. These elements are enhanced by 2.2 and 0.5 dex, respectively, in the A component and by 2.4 and 0.5 dex, respectively, in the B component.

Enhancing weak magnetic field MME coupling in NdFeB magnet/piezoelectric composite cantilevers with stress concentration effect

2021 ◽  
Vol 118 (13) ◽  
pp. 132902
Author(s):  
Zhonghui Yu ◽  
Zhaoqiang Chu ◽  
Jikun Yang ◽  
Mohammad Javad Pourhosseini Asl ◽  
Zhanmiao Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Stress Concentration ◽  
Weak Magnetic Field ◽  
Concentration Effect ◽  
Piezoelectric Composite ◽  
Ndfeb Magnet ◽  
Stress Concentration Effect

Dynamics of a disc in a nematic liquid crystal

Soft Matter ◽  
2016 ◽  
Vol 12 (4) ◽  
pp. 1279-1294 ◽  
Author(s):  
Alena Antipova ◽  
Colin Denniston
Keyword(s):  
Magnetic Field ◽  
Liquid Crystal ◽  
Numerical Simulations ◽  
Nematic Liquid Crystal ◽  
Weak Magnetic Field ◽  
Angular Speed ◽  
The Magnetic Field

We explain the motion of a micron-sized ferromagnetic disc immersed in a nematic liquid crystal under the action of a weak magnetic field using numerical simulations. We show that the disc's behaviour can be controlled by the angular speed of the magnetic field and its magnitude.

scholarly journals THE ENERGY EIGENVALUES OF THE TWO DIMENSIONAL HYDROGEN ATOM IN A MAGNETIC FIELD

2006 ◽  
Vol 15 (06) ◽  
pp. 1263-1271 ◽  
Author(s):  
A. SOYLU ◽  
O. BAYRAK ◽  
I. BOZTOSUN
Keyword(s):  
Magnetic Field ◽  
Hydrogen Atom ◽  
Iteration Method ◽  
Weak Magnetic Field ◽  
The Other ◽  
Asymptotic Iteration Method ◽  
Iterative Approach ◽  
Two Dimensional ◽  
Energy Eigenvalues ◽  
The Magnetic Field

In this paper, the energy eigenvalues of the two dimensional hydrogen atom are presented for the arbitrary Larmor frequencies by using the asymptotic iteration method. We first show the energy eigenvalues for the case with no magnetic field analytically, and then we obtain the energy eigenvalues for the strong and weak magnetic field cases within an iterative approach for n=2-10 and m=0-1 states for several different arbitrary Larmor frequencies. The effect of the magnetic field on the energy eigenvalues is determined precisely. The results are in excellent agreement with the findings of the other methods and our method works for the cases where the others fail.

Space‐Charge Waves on Plasma Columns in a Weak Magnetic Field

1971 ◽  
Vol 42 (6) ◽  
pp. 2421-2423 ◽  
Author(s):  
H. Sugai ◽  
N. Sato ◽  
Y. Hatta
Keyword(s):  
Magnetic Field ◽  
Space Charge ◽  
Weak Magnetic Field ◽  
Space Charge Waves

The enhancing effect of weak magnetic field on degradation of Orange II by zero-valent iron

2014 ◽  
Vol 57 (4) ◽  
pp. 1659-1670 ◽  
Author(s):  
Zhongjin Xiao ◽  
Qiaoli Zhou ◽  
Hejie Qin ◽  
Junlian Qiao ◽  
Xiaohong Guan
Keyword(s):  
Magnetic Field ◽  
Weak Magnetic Field ◽  
Zero Valent Iron ◽  
Orange Ii ◽  
Enhancing Effect

Aging of zerovalent iron in various coexisting solutes: Characteristics, reactivity toward selenite and rejuvenation by weak magnetic field

2018 ◽  
Vol 191 ◽  
pp. 94-100 ◽  
Author(s):  
Xueying Zhang ◽  
Jinxiang Li ◽  
Yuankui Sun ◽  
Lina Li ◽  
Bingcai Pan ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Weak Magnetic Field ◽  
Zerovalent Iron
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