Measurement of Charge Exchange and X-Ray Emission Cross Sections for Solar Wind-Comet Interactions [0.03%]
太阳风与彗星相互作用的荷交换和X射线发射散射截面的测定
JB Greenwood,ID Williams,SJ Smith et al.
JB Greenwood et al.
X-ray emission from a comet was observed for the first time in 1996. One of the mechanisms believed to be contributing to this surprisingly strong emission is the interaction of highly charged solar wind ions with cometary gases. Reported h...
MA Malkov,PH Diamond,HJ Völk
MA Malkov
There are two distinct regimes of the first-order Fermi acceleration of shocks. The first is a linear (test-particle) regime in which most of the shock energy goes into thermal and bulk motions of the plasma. The second is an efficient regi...
SM White,P Janardhan,MR Kundu
SM White
We report the direct observation of motion associated with a solar flare at a speed of 26,000 km s-1. The motion is seen from a radio source at 0.33 GHz, which suddenly starts moving during the flare. At its peak, the radio source covers a ...
R Howe,J Christensen-Dalsgaard,F Hill et al.
R Howe et al.
Helioseismic observations have detected small temporal variations of the rotation rate below the solar surface that correspond to the so-called "torsional oscillations" known from Doppler measurements of the surface. These appear as bands o...
K Shigemori,T Ditmire,BA Remington et al.
K Shigemori et al.
We report on the initial results of experiments being developed on the Falcon laser to simulate radiative astrophysical shocks. Cylindrically diverging blast waves were produced in low-density ( approximately 1018 cm-3), high-Z gas by laser...
An Improved Red Spectrum of the Methane or T Dwarf SDSS 1624+0029: The Role of the Alkali Metals [0.03%]
SDSS J162425.78+002931.8次甲烷或T矮星的改进红端光谱：碱金属的作用
J Liebert,IN Reid,A Burrows et al.
J Liebert et al.
A Keck II low-resolution spectrum shortward of 1 µm is presented for SDSS 1624+0029, the first field methane or T dwarf discovered in the Sloan Digital Sky Survey. Significant flux is detected down to the spectrum's short-wavelength limit ...
On Stellar Activity Enhancement Due to Interactions with Extrasolar Giant Planets [0.03%]
关于与系外巨行星相互作用引起恒星活动增强的研究
M Cuntz,SH Saar,ZE Musielak
M Cuntz
We present a first attempt to identify and quantify possible interactions between recently discovered extrasolar giant planets (and brown dwarfs) and their host stars, resulting in activity enhancement in the stellar outer atmospheres. Many...
SG Korzennik,TM Brown,DA Fischer et al.
SG Korzennik et al.
HD 89744 is an F7 V star with a mass of 1.4 M middle dot in circle, an effective temperature of 6166 K, an age of 2.0 Gyr, and metallicity &sqbl0;Fe&solm0;H&sqbr0;=0.18. The radial velocity of the star has been monitored with the Advanced F...
GH Moriarty-Schieven,JA Powers,HM Butner et al.
GH Moriarty-Schieven et al.
L1551NE is a very young (class 0 or I) low-mass protostar located close to the well-studied L1551 IRS 5. Here we present evidence, from 1.3 mm continuum interferometric observations at approximately 1&arcsec; resolution, for a binary compan...
Evidence of Multiple r-Process Sites in the Early Galaxy: New Observations of CS 22892-052 [0.03%]
早期银河系中多重r-过程产生机制存在的证据：CS 22892-052的新观测结果
C Sneden,JJ Cowan,II Ivans II et al.
C Sneden et al.
First results are reported of a new abundance study of neutron-capture elements in the ultra-metal-poor (&sqbl0;Fe&solm0;H&sqbr0;=-3.1) halo field giant star CS 22892-052. Using new high-resolution, high signal-to-noise ratio spectra, abund...