output
19962026
most citedSDSS-III: Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy, and Extra-Solar Planetary Systems

2.2k citations

Showing 2008Show all

15 papers · 1 filter

astro-ph2008★ 11 cited

A New Diagnostic Method for Assessment of Stellar Stratification in Star Clusters

Dimitrios A. Gouliermis, Richard de Grijs, Yu Xin

We propose a new method for the characterization of stellar stratification in stellar systems. The method uses the mean-square radius (also called the Spitzer radius) of the system…

astro-ph2008★ 136 cited

Results of WEBT, VLBA and RXTE monitoring of 3C 279 during 2006-2007

V. M. Larionov, S. G. Jorstad, A. P. Marscher +2

We present radio-to-optical data taken by the WEBT, supplemented by VLBA and RXTE observations, of 3C 279. Our goal is to use this extensive database to draw inferences regarding t…

astro-ph2008★ 51 cited

Plasmoids in Reconnecting Current Sheets: Solar and Terrestrial Contexts Compared

J. Lin, S. R. Cranmer, C. J. Farrugia

Magnetic reconnection plays a crucial role in violent energy conversion occurring in the environments of high electrical conductivity, such as the solar atmosphere, magnetosphere,…

astro-ph2008★ 145 cited

Absorption of 10--200 Gev Gamma Rays by Radiation from BLR in Blazars

H. T. Liu, J. M. Bai

In this paper, we study the photon-photon pair production optical depth for gamma-rays with energies from 10 to 200 GeV emitted by powerful blazars due to the diffuse radiation fie…

astro-ph2008★ 40 cited

Absorption of 10 Gev--1 Tev Gamma Rays by Radiation from Broad-Line Region in 3C 279

H. T. Liu, J. M. Bai, L. Ma

In this paper, we study the photon-photon pair production optical depth for 10 GeV--1 TeV gamma rays from 3C 279 due to the diffuse radiation of broad-line region (BLR). Assuming a…

astro-ph2008★ 67 cited

The evolutionary status of W Ursae Majoris-type systems

Lifang Li, Fenghui Zhang, Zhanwen Han +2

Well-determined physical parameters of 130 W UMa systems have been collected from the literature. Based on these data, the evolutionary status and dynamical evolution of W UMa syst…

astro-ph2008★ 45 cited

Solar Models with Revised Abundances and Opacities

W. M. Yang, S. L. Bi

Using reconstructed opacities, we construct solar models with low heavy-element abundance. Rotational mixing and enhanced diffusion of helium and heavy elements are used to reconci…

astro-ph2008★ 23 cited

A search for southern ultracool dwarfs in young moving groups

J. R. A. Clarke, D. J. Pinfield, M. C. Galvez-Ortiz +7

We associate 132 low-mass ultracool dwarfs in the southern hemisphere as candidate members of five moving groups using photometric and astrometric selection techniques. Of these ob…

astro-ph2008★ 161 cited

Discovery of superstrong, fading, iron line emission and double-peaked Balmer lines of the galaxy SDSSJ0952+2143 - the light echo of a huge flare

S. Komossa, H. Zhou, T. Wang +9

We report the discovery of superstrong, fading, high-ionization iron line emission in the galaxy SDSSJ095209.56+214313.3 (SDSSJ0952+2143 hereafter), which must have been caused by…

astro-ph2008★ 4 cited

Broad-line and Multi-wave Band Emission from Blazars

T. F. Yi, G. Z. Xie

We study the correlations of the flux of the broad-line emission () with the X-ray emission flux, optical emission flux at 5500 Åand radio emission flux at 5 GHz, respecti…

astro-ph2008★ 48 cited

Tests for Standard Accretion Disk Models by Variability in Active Galactic Nuclei

H. T. Liu, J. M. Bai, X. H. Zhao +1

In this paper, standard accretion disk models of AGNs are tested using light curves of 26 objects well observed for reverberation mapping. Time scales of variations are estimated b…

astro-ph2008★ 24 cited

Spins of the supermassive black hole in M87: new constraints from TeV observations

Jian-Min Wang, Yan-Rong Li, Jain-Cheng Li +1

The rapid TeV ray variability detected in the well-known nearby radio galaxy M87 implies an extremely compact emission region (5-10 Schwarzschild radii) near the horizon of the…

astro-ph2008★ 59 cited

Radio-to-UV monitoring of AO 0235+164 by the WEBT and Swift during the 2006--2007 outburst

C. M. Raiteri, M. Villata, V. M. Larionov +2

The blazar AO 0235+164 was claimed to show a quasi-periodic behaviour in the radio and optical bands. Moreover, an extra emission component contributing to the UV and soft X-ray fl…

astro-ph2008★ 122 cited

Optical Intra-day Variability in Blazars

A. C. Gupta, J. H. Fan, J. M. Bai +1

We selected a sample of a dozen blazars which are the prime candidates for simultaneous multi-wavelength observing campaigns in their outburst phase. We searched for optical outbur…

astro-ph2008

A New Scenario on X-ray Shallow Decay of Gamma-ray Bursts

Jirong Mao, Jiancheng Wang

In this Letter, we propose that a microphysical process takes a vital role in the shocked region in which the prompt emission of GRBs is emitted. The turbulent energy is included i…