Semiconvection and Overshooting: Schwarzschild and Ledoux Criteria Revisited [0.03%]
Schwarzschild和Ledoux准则再析：半对流和穿透效应
VM Canuto
VM Canuto
We show that the Schwarzschild formalism, if accepted as the description of the structure of a semiconvective region, necessarily implies overshooting. The Ledoux formalism (if accepted) can be used without overshooting, provided a new rela...
Low-Energy Anomalous Cosmic Rays in the Ecliptic Plane: 1-5 AU [0.03%]
掠过 ecliptic 平面的低能异常宇宙射线：1至5AU
LJ Maclennan
LJ Maclennan
Anomalous cosmic-ray (ACR) oxygen (O) fluxes in the energy range 0.5-5.0 MeV nucleon-1 were measured in the ecliptic plane at 1 and 5 AU in 1997 and 1998. Using measurements from essentially identical instruments on the Advanced Composition...
SH Saar,D Fischer
SH Saar
We study stars in the Lick planetary survey for correlations between simultaneous measurements of high-precision radial velocities vr and magnetic activity (as measured in an SIR emission index from Ca ii lambda8662). We find significant co...
VLA Imaging of the Disk Surrounding the Nearby Young Star TW Hydrae [0.03%]
用甚大阵对近邻年轻恒星TW Hya周围盘子的成像研究
DJ Wilner,PT Ho,JH Kastner et al.
DJ Wilner et al.
The TW Hydrae system is perhaps the closest analog to the early solar nebula. We have used the Very Large Array to image TW Hya at wavelengths of 7 mm and 3.6 cm with resolutions of 0&farcs;1 ( approximately 5 AU) and 1&farcs;0 ( approximat...
A Burrows,T Guillot,WB Hubbard et al.
A Burrows et al.
The recent discovery that the close-in extrasolar giant planet HD 209458b transits its star has provided a first-of-its-kind measurement of the planet's radius and mass. In addition, there is a provocative detection of the light reflected o...
Z Ivezic,M Elitzur
Z Ivezic
Unbiased analysis shows that IRAS data reliably differentiate between the early and late stages of stellar evolution because objects at these stages clearly segregate in infrared color-color diagrams. Structure in these diagrams is primaril...
Formation of the Galactic Stellar Halo: Origin of the Metallicity-Eccentricity Relation [0.03%]
银河系恒星晕的形成：金属量-偏心率关系的起源
K Bekki,M Chiba
K Bekki
Motivated by the recently improved knowledge on the kinematic and chemical properties of the Galactic metal-poor stars, we present the numerical simulation for the formation of the Galactic stellar halo to interpret the observational result...
New Evidence for the Complex Structure of the Red Giant Branch in omega Centauri [0.03%]
蝘蜓座ω红巨星分支复杂结构的新证据
E Pancino,FR Ferraro,M Bellazzini et al.
E Pancino et al.
We report on the complex structure of the red giant branch (RGB) of omega Centauri, based on a new wide-field and wide-color baseline B and I photometry. Our color-magnitude diagram (CMD) shows the presence of multiple populations along thi...
Kilohertz Quasi-periodic Oscillations in Low-Mass X-Ray Binary Sources and Their Relation to the Neutron Star Magnetic Field [0.03%]
千赫兹准周期振荡及其与低质量X射线双星中脉冲星磁层结构的关系
S Campana
S Campana
Starting from the observation that kilohertz quasi-periodic oscillations (kHz QPOs) occur in a very narrow range of X-ray luminosities in neutron star low-mass X-ray binaries, we try to link the kHz QPO observability to variations of the ne...
N Andersson,DI Jones,KD Kokkotas et al.
N Andersson et al.
We present a simple spin-evolution model that predicts that rapidly rotating accreting neutron stars will be confined mainly to a narrow range of spin frequencies: P=1.5-5 ms. This is in agreement with current observations of neutron stars ...