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29 papers · 2 filters
SCUSS u-Band Emission as a Star-Formation-Rate Indicator
Zhimin Zhou, Xu Zhou, Hong Wu +14
We present and analyze the possibility of using optical -band luminosities to estimate star-formation rates (SFRs) of galaxies based on the data from the South Galactic Ca…
Chandra Survey of Nearby Galaxies: The Catalog
Rui She, Luis C. Ho, Hua Feng
We searched in the public archive of the Chandra X-ray Observatory as of March 2016 and assembled a sample of 719 galaxies within 50 Mpc with ACIS observations available. By cross-…
Shedding Light on the Compton-thick Active Galactic Nucleus in the Ultra-luminous Infrared Galaxy UGC 5101 with Broadband X-ray Spectroscopy
Saeko Oda, Atsushi Tanimoto, Yoshihiro Ueda +3
We report the broadband X-ray spectra of the ultra-luminous infrared galaxy (ULIRG) UGC 5101 in the 0.25-100 keV band observed with Swift/Burst Alert Telescope (BAT), NuSTAR, Suzak…
To the Edge of M87 and Beyond: Spectroscopy of Intracluster Globular Clusters and Ultra Compact Dwarfs in the Virgo Cluster
Youkyung Ko, Ho Seong Hwang, Myung Gyoon Lee +6
We present the results from a wide-field spectroscopic survey of globular clusters (GCs) in the Virgo Cluster. We obtain spectra for 201 GCs and 55 ultracompact dwarfs (UCDs) using…
Silicate Dust in Active Galactic Nuclei
Yanxia Xie, Aigen Li, Lei Hao
The unification theory of active galactic nuclei (AGNs) hypothesizes that all AGNs are surrounded by an anisotropic dust torus and are essentially the same objects but viewed from…
Globular Clusters As Tracers of Fine Structure in the Dramatic Shell Galaxy NGC 474
Sungsoon Lim, Eric W. Peng, Pierre-Alain Duc +7
Globular clusters (GCs) are some of the most visible tracers of the merging and accretion history of galaxy halos. Metal-poor GCs, in particular, are thought to arrive in massive g…