De Grandi S,S Molendi
De Grandi S
We present results from a BeppoSAX observation of the rich cluster Abell 3266. The broadband spectrum (2-50 keV) of the cluster, when fitted with an optically thin thermal emission model, yields a temperature of 8.1+/-0.2 keV and a metal ab...
Hard X-Ray Emission from Elliptical Galaxies and Its Contribution to the X-Ray Background [0.03%]
椭圆星系的硬X射线辐射及其对X射线背景的贡献
Di Matteo T,SW Allen
Di Matteo T
We explore the implications of the discovery of hard, power-law X-ray sources in the spectra of nearby elliptical galaxies for the origin of the X-ray background (XRB). The spectra of these sources are consistent with models of thermal brem...
Evaporation of Accretion Disks around Black Holes: The Disk-Corona Transition and the Connection to the Advection-dominated Accretion Flow [0.03%]
黑洞吸积盘的蒸发：盘-冠层过渡及其与低频辐射吸积流的关系
BF Liu,W Yuan,F Meyer et al.
BF Liu et al.
We apply the disk-corona evaporation model (Meyer & Meyer-Hofmeister) originally derived for dwarf novae to black hole systems. This model describes the transition of a thin cool outer disk to a hot coronal flow. The mass accretion rate det...
Integral Field Spectroscopy of Markarian 273: Mapping High-Velocity Gas Flows and an Off-Nucleus Seyfert 2 Nebula [0.03%]
积分场光谱测绘Markarian 273：高速气体流及偏核 Seyfert 2 星云成像
L Colina,S Arribas,KD Borne
L Colina
Integral field optical spectroscopy with the INTEGRAL fiber-based system is used to map the extended ionized regions and gas flows in Mrk 273, one of the closest ultraluminous infrared galaxies. The Hbeta and [O iii] lambda5007 maps show th...
Cross-Correlation of Tenerife Data with Galactic Templates-Evidence for Spinning Dust? [0.03%]
特内里费数据与银河系模板的互相关：旋转尘埃的证据？
de Oliveira-Costa A,M Tegmark,CM Gutiérrez et al.
de Oliveira-Costa A et al.
The recent discovery of dust-correlated diffuse microwave emission has prompted two rival explanations: free-free emission and spinning dust grains. We present new detections of this component at 10 and 15 GHz by the switched-beam Tenerife ...
Forming the First Stars in the Universe: The Fragmentation of Primordial Gas [0.03%]
宇宙中首批恒星的形成：原始气体的分裂
V Bromm V,PS Coppi,RB Larson
V Bromm V
In order to constrain the initial mass function of the first generation of stars (Population III), we investigate the fragmentation properties of metal-free gas in the context of a hierarchical model of structure formation. We investigate t...
Inhomogeneous Reionization and the Polarization of the Cosmic Microwave Background [0.03%]
不均匀再离子化与宇宙微波背景的偏振效应
J Weller
J Weller
In a universe with inhomogeneous reionization, the ionized patches create a second-order signal in the cosmic microwave background polarization anisotropy. This signal originates in the coupling of the free-electron fluctuation to the quadr...
The Detection of Outflows in the Infrared-quiet Molecular Core NGC 6334/I(North) [0.03%]
红外宁静分子核心NGC 6334/I(NORTH)中流出物的检测
ST Megeath,AR Tieftrunk
ST Megeath
We find strong evidence for outflows originating in the dense molecular core NGC 6334/I(North): a 1000 M middle dot in circle molecular core distinguished by its lack of H ii regions and mid-IR emission. New observations were obtained of th...
CD Matzner,CF McKee
CD Matzner
We demonstrate that magnetically collimated protostellar winds will sweep ambient material into thin, radiative, momentum-conserving shells whose features reproduce those commonly observed in bipolar molecular outflows. We find that the typ...
MG Pereira,J Braga,F Jablonski
MG Pereira
We report strong evidence for a approximately 304 day periodicity in the spin history of the accretion-powered pulsar GX 1+4 that is most probably associated with the orbital period of the system. We have used data from the Burst and Transi...