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Exoplanets in the Antarctic Sky. I. The First Data Release of AST3-II (CHESPA) and New Found Variables within the Southern CVZ of TESS
Hui Zhang, Zhouyi Yu, Ensi Liang +37
Located at Dome A, the highest point of the Antarctic plateau, the Chinese Kunlun station is considered to be one of the best ground-based photometric sites because of its extremel…
Observations of SN 2017ein Reveal Shock Breakout Emission and A Massive Progenitor Star for a Type Ic Supernova
Danfeng Xiang, Xiaofeng Wang, Jun Mo +23
We present optical and ultraviolet observations of nearby type Ic supernova SN 2017ein as well as detailed analysis of its progenitor properties from both the early-time observatio…
The Cold and Dusty Circumstellar Matter around Fast-expanding Type Ia Supernovae
Xiaofeng Wang, Jia Chen, Lifan Wang +5
Type Ia supernovae (SNe Ia) play key roles in revealing the accelerating expansion of the universe, but our knowledge about their progenitors is still very limited. Here we report…
Exoplanets in the Antarctic sky. II. 116 Transiting Exoplanet Candidates Found by AST3-II (CHESPA) within the Southern CVZ of TESS
Hui Zhang, Zhouyi Yu, Ensi Liang +37
We report first results from the CHinese Exoplanet Searching Program from Antarctica (CHESPA)---a wide-field high-resolution photometric survey for transiting exoplanets carried ou…
SN 2014J in M82: New Insights On the Spectral Diversity of Type Ia Supernovae
Kaicheng Zhang, Xiaofeng Wang, JuJia Zhang +25
We present extensive spectroscopic observations for one of the closest type Ia supernovae (SNe Ia), SN 2014J discovered in M82, ranging from 10.4 days before to 473.2 days after B-…
Rigid colourings of hypergraphs and contiguity
Peter Ayre, Catherine Greenhill
We consider the problem of -colouring a -uniform random hypergraph, where , and determine the rigidity threshold. For edge densities above the rigidity threshold,…