GH Smith
GH Smith
If a substantial fraction of the proto-Galactic halo was constituted of cloudy structures of sizes 1 kpc or larger, then collisions between these clouds would have been common during the infall of the Galaxy. Such collisions would have shap...
Constraints on the Space Density of Methane Dwarfs and the Substellar Mass Function from a Deep Near-Infrared Survey [0.03%]
来自深近红外巡天的甲烷矮星的空间密度限制以及亚 stellar 质量函数
TM Herbst,D Thompson,R Fockenbrock et al.
TM Herbst et al.
We report preliminary results of a deep near-infrared search for methane-absorbing brown dwarfs; almost 5 yr after the discovery of Gl 229b, there are only a few confirmed examples of this type of object. New J-band, wide-field images, comb...
Globular Cluster Formation Triggered by the Initial Starburst in Galaxy Formation [0.03%]
星系形成初期恒星爆发触发球状星团形成
Y Taniguchi,N Trentham,S Ikeuchi
Y Taniguchi
We propose and investigate a new formation mechanism for globular clusters in which they form within molecular clouds that are formed in the shocked regions created by galactic winds driven by successive supernova explosions shortly after t...
JE Pringle,RR Antonucci,CJ Clarke et al.
JE Pringle et al.
We demonstrate that by combining optical, radio, and X-ray observations of a Seyfert galaxy, it is possible to provide a direct measurement of the angle beta between the direction of the radio jet and the normal to the plane of the spiral h...
Two Different Accretion Classes in Seyfert 1 Galaxies and QSOs [0.03%]
I类和II类活动星系核的吸积模型及其在宽吸收线准星不动态中的应用
Y Lu,Q Yu
Y Lu
The mass of the central black holes in Seyfert galaxies and QSOs can be determined from the broad emission lines and the reverberation method. Using the measured black hole mass and the bolometric or ionizing luminosity, the accretion rate ...
Sunyaev-Zeldovich Fluctuations from Spatial Correlations between Clusters of Galaxies [0.03%]
星系团间的空间关联带来的太阳雅弗波动
E Komatsu,T Kitayama
E Komatsu
We present angular power spectra of the cosmic microwave background radiation anisotropy due to fluctuations of the Sunyaev-Zeldovich (SZ) effect through clusters of galaxies. A contribution from the correlation among clusters, which has be...
GM Mason,JE Mazur,JR Dwyer
GM Mason
We have measured the 3He abundance from approximately 0.5 to 2 MeV nucleon-1 in 12 large solar energetic particle (SEP) events during the period 1997 November-1999 June. In five of the events, the 3He time-intensity profile is similar to th...
Timing Spectroscopy of Quasi-Periodic Oscillations in the Low-Mass X-Ray Neutron Star Binaries [0.03%]
低质量X射线双星中准周期振荡的时序光谱学研究
L Titarchuk,V Osherovich V,S Kuznetsov
L Titarchuk
Precise simultaneous measurements of the frequencies of the two kilohertz quasi-periodic oscillations (referred in the literature as upper and lower kHz QPOs) cast doubts on the validity of the simple beat-frequency interpretation and some ...
Magnetar Spin-Down [0.03%]
磁星自转速率下降现象
AK Harding,I Contopoulos I,D Kazanas
AK Harding
We examine the effects of a relativistic wind on the spin-down of a neutron star and apply our results to the study of soft gamma repeaters (SGRs), which are thought to be neutron stars with magnetic fields greater than 1014 G. We derive a ...
C Freiburghaus,S Rosswog,F Thielemann
C Freiburghaus
The production site of the neutron-rich heavy elements that are formed by rapid neutron capture (the r-process) is still unknown despite intensive research. Here we show detailed studies of a scenario that has been proposed earlier by Latti...