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The braking index of PSR B0540-69 and the associated pulsar wind nebula emission after spin-down rate transition 期刊论文 OAI收割
Monthly Notices of the Royal Astronomical Society, 2020, 卷号: 494, 页码: 1865-1870
作者: HXMT

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收藏 | 浏览/下载：57/0 | 提交时间：2022/02/08

stars: magnetic field stars: neutron pulsars: general Astrophysics - High Energy Astrophysical Phenomena Abstract: In 2011 December, PSR B054-69 experienced a spin-down rate transition (SRT), after which the spin-down power of the pulsar increased by $\sim 36{{\ \rm per\ cent}}$. About 1000 d after the SRT, the X-ray luminosity of the associated pulsar wind nebula (PWN) was found to brighten by $32\pm 8{{\ \rm per\ cent}}$. After the SRT, the braking index n of PSR B0540-69 changes from n = 2.12 to 0.03 and then keeps this value for about five years before rising to n = 0.9 in the following years. We find that most of the current models have difficulties in explaining the measured braking index. One exceptive model of the braking index evolution is the increasing dipole magnetic field of PSR B0540-69. We suggest that the field increase may result from some instabilities within the pulsar core that enhance the poloidal component at the price of toroidal component of the magnetic field. The increasing dipole magnetic field will result in the X-ray brightening of the PWN. We fit the PWN X-ray light curve by two models: one assumes a constant magnetic field within the PWN during the brightening and the other assumes an enhanced magnetic field proportional to the energy density of the PWN. It appears that the two models fit the data well, though the later model seems to fit the data a bit better. This provides marginal observational evidence that magnetic field in the PWN is generated by the termination shock. Future high-quality and high-cadence data are required to draw a solid conclusion.

Probing the structural, electronic and magnetic properties of multicenter Fe2S2 (0/-), Fe3S4 (0/-) and Fe4S4 (0/-) clusters 期刊论文 OAI收割
Journal of Molecular Modeling, 2013, 卷号: 19, 期号: 4, 页码: 1527-1536
L. P. Ding; X. Y. Kuang; P. Shao; M. M. Zhong

收藏 | 浏览/下载：15/0 | 提交时间：2013/12/24

Fe-S cluster Photoelectron spectroscopy Density functional theory Magnetic properties iron-sulfur proteins absorption-fine-structure photoelectron-spectroscopy correlation-energy gas-phase density thermochemistry approximation molecules spectra

Surface properties of 3d transition metals 期刊论文 OAI收割
Philosophical Magazine, 2011, 卷号: 91, 期号: 27, 页码: 3627-3640
M. P. J. Punkkinen; Q. M. Hu; S. K. Kwon; B. Johansson; J. Kollar; L. Vitos

收藏 | 浏览/下载：18/0 | 提交时间：2012/04/13

surface relaxation surface energy surface stress magnetic transition metals density functional theory full charge-density initio molecular-dynamics total-energy calculations augmented-wave method ab-initio electronic-structure atomic volume work function basis-set relaxation

Quantitative Analysis of CME Deflections in the Corona 期刊论文 OAI收割
SOLAR PHYSICS, 2011, 卷号: 271, 期号: 1-2, 页码: 111-139
作者: Gui, Bin; Shen, Chenglong; Wang, Yuming; Ye, Pinzhong; Liu, Jiajia

收藏 | 浏览/下载：24/0 | 提交时间：2014/12/15

Coronal mass ejections (CME) Deflections Magnetic energy density

Static equation of state of bcc iron 期刊论文 OAI收割
Physical Review B, 2010, 卷号: 82, 期号: 13
H. L. Zhang; S. Lu; M. P. J. Punkkinen; Q. M. Hu; B. Johansson; L. Vitos

收藏 | 浏览/下载：19/0 | 提交时间：2012/04/13

generalized-gradient-approximation total-energy calculations density-functional approximations initio molecular-dynamics magnetic phase-stability augmented-wave method ab-initio elastic-constants electron-gas ultrasoft pseudopotentials

Electronic and magnetic properties of graphene absorbed with S atom: A first-principles study 期刊论文 OAI收割
Journal of Applied Physics, 2009, 卷号: 105, 期号: 10
Y. G. Zhou; X. T. Zu; F. Gao; H. Y. Xiao; H. F. Lv

收藏 | 浏览/下载：17/0 | 提交时间：2012/04/13

adsorption band structure density functional theory graphene magnetic moments surface energy surface potential exchange

Effect of doping with Co and/or Cu on electronic structure and optical properties of ZnO 期刊论文 OAI收割
Journal of Applied Physics, 2009, 卷号: 105, 期号: 4
M. Xu; H. Zhao; K. Ostrikov; M. Y. Duan; L. X. Xu

收藏 | 浏览/下载：27/0 | 提交时间：2012/04/13

ab initio calculations cobalt copper density functional theory dielectric function electronic structure energy gap Fermi level ferromagnetism II-VI semiconductors magnetoelectronics red shift reflectivity refractive index semiconductor doping semimagnetic semiconductors wide band gap semiconductors zinc compounds ferromagnetic properties magnetic semiconductors thin-films doped zno

First-principles study of CoO films on MnO (111): Stability and interfacial structure 期刊论文 OAI收割
Physica B-Condensed Matter, 2008, 卷号: 403, 期号: 18, 页码: 3191-3194
K. L. Yao; H. M. Huang; Z. L. Liu

收藏 | 浏览/下载：24/0 | 提交时间：2012/04/13

density functional theory surface energy electronic structure metal-ceramic interfaces electronic-structure magnetic anisotropy surface

The ground state of quantum rings in a magnetic field 期刊论文 OAI收割
MODERN PHYSICS LETTERS B, 2006, 卷号: 20, 期号: 23, 页码: 1443-1451
作者: Liu, Yi-Min; Huang, Gang-Ming; Shi, Ting-Yun

收藏 | 浏览/下载：21/0 | 提交时间：2015/07/17

quantum ring magnetic field energy ground state density function

Evidence of d-wave pairing in MTG-YBa2Cu2.99Li0.01Ox crystals determined from the low-temperature specific heat 期刊论文 OAI收割
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2006, 卷号: 19, 期号: 6, 页码: 503-507
Bai, Z; Wang, ZH; Li, PJ; Qiu, L; Zhang, H; Gao, J

收藏 | 浏览/下载：23/0 | 提交时间：2012/03/24

MAGNETIC-FIELD DEPENDENCE DENSITY-OF-STATES CUPRATE SUPERCONDUCTORS MIXED-STATE ENERGY NODES GAP YBA2CU3O7-DELTA YBA2CU3O6.95 VORTEX