output
19932026
Showing 2013 · astro-ph.IMShow all

11 papers · 2 filters

astro-ph.IM2013

Up to 700k GPU cores, Kepler, and the Exascale future for simulations of star clusters around black holes

P. Berczik, R. Spurzem, L. Wang +9

We present direct astrophysical N-body simulations with up to a few million bodies using our parallel MPI/CUDA code on large GPU clusters in China, Ukraine and Germany, with differ…

astro-ph.IM2013★ 1 cited

Hi-fi phenomenological description of eclipsing binary light variations as the basis for their period analysis

Zdeněk Mikulášek, Miloslav Zejda, Marek Chrastina +2

In-depth analysis of eclipsing binary (EB) observational data collected for several decades can inform us about a lot of astrophysically interesting processes taking place in the s…

astro-ph.IM2013★ 29 cited

Search for carbon stars and DZ white dwarfs in SDSS spectra survey through machine learning

Jianmin Si, Ali Luo, Yinbi Li +5

Carbon stars and DZ white dwarfs are two types of rare objects in the Galaxy. In this paper, we have applied the label propagation algorithm to search for these two types of stars…

astro-ph.IM2013★ 11 cited

Wavelength calibration of the Hamilton echelle spectrograph

Yu. V. Pakhomov, G. Zhao

We present the wavelength calibration of the Hamilton echelle spectrograph (the Lick observatory). The main problem of the calibration arises from the fact that thorium lines are a…

astro-ph.IM2013★ 1k cited

The Tenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Apache Point Observatory Galactic Evolution Experiment

Christopher P. Ahn, Rachael Alexandroff, Carlos Allende Prieto +232

The Sloan Digital Sky Survey (SDSS) has been in operation since 2000 April. This paper presents the tenth public data release (DR10) from its current incarnation, SDSS-III. This da…

astro-ph.IM2013★ 9 cited

On-board GRB trigger algorithms of SVOM-GRM

Dong-Hua Zhao, Bo-Bing Wu, Li-Ming Song +4

GRM (Gamma-Ray Monitor) is the high energy detector on-board the future Chinese-French satellite SVOM (Space-based multi-band astronomical Variable Object Monitor) which is dedicat…

astro-ph.IM2013★ 29 cited

Estimating Photometric Redshifts of Quasars via K-nearest Neighbor Approach Based on Large Survey Databases

Zhang Yanxia, Ma He, Peng Nanbo +2

We apply one of lazy learning methods named k-nearest neighbor algorithm (kNN) to estimate the photometric redshifts of quasars, based on various datasets from the Sloan Digital Sk…

astro-ph.IM2013★ 10 cited

Moon night sky brightness simulation for Xinglong station

Song Yao, Hao-Tong Zhang, Hai-Long Yuan +5

With a sky brightness monitor in Xinglong station of National Astronomical Observatories of China (NAOC), we collected data from 22 dark clear nights and 90 lunar nights. We first…

astro-ph.IM2013★ 6 cited

Statistical Study of 2XMMi-DR3/SDSS-DR8 Cross-correlation Sample

Zhang Yan-Xia, Zhou Xin-Lin, Zhao Yong-Heng +1

Cross-correlating the XMM-Newton 2XMMi-DR3 catalog with the Sloan Digital Sky Survey (SDSS) Data Release 8, we obtain one of the largest X-ray/optical catalogs and explore the dist…

astro-ph.IM2013★ 66 cited

Using hierarchical octrees in Monte Carlo radiative transfer simulations

W. Saftly, P. Camps, M. Baes +4

A crucial aspect of 3D Monte Carlo radiative transfer is the choice of the spatial grid used to partition the dusty medium. We critically investigate the use of octree grids in Mon…

astro-ph.IM2013★ 17 cited

A graphical analysis of the systematic error of classical binned methods in constructing luminosity functions

Zunli Yuan, Jiancheng Wang

The classical 1/Va and PC methods of constructing binned luminosity functions (LFs) are revisited and compared by graphical analysis. Using both theoretical analysis and illustrati…