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62 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…
A systematic observational study of radio properties of H2O megamaser Seyfert-2 galaxies
Z. W. Liu, J. S. Zhang, C. Henkel +5
A systematic study is performed on radio properties of HO megamaser host Seyfert 2 galaxies, through multi-band radio continuum observations (at 11cm, 6.0 cm, 3.6 cm, 2.0 cm…
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…
Carbon monoxide in an extremely metal-poor galaxy
Yong Shi, Junzhi Wang, Zhi-Yu Zhang +4
Extremely metal-poor galaxies with metallicity below 10% of the solar value in the local universe are the best analogues to investigating the interstellar medium at a quasi-primiti…
Millimeter Spectral Line Mapping Observations Toward Four Massive Star Forming HII Regions
Shanghuo Li, Junzhi Wang, Zhi-Yu Zhang +6
We present spectral line mapping observations toward four massive star-forming regions (Cepheus A, DR21S, S76E and G34.26+0.15), with the IRAM 30 meter telescope at 2 mm and 3 mm b…
SDSS-IV MaNGA: environmental dependence of stellar age and metallicity gradients in nearby galaxies
Zheng Zheng, Huiyuan Wang, Junqiang Ge +20
We present a study on the stellar age and metallicity distributions for 1105 galaxies using the STARLIGHT software on MaNGA integral field spectra. We derive age and metallicity gr…