Search Publications

Surface thermophysical properties on the potentially hazardous asteroid (99942) Apophis

Ip, Wing-Huen; Yu, Liang-Liang; Ji, Jianghui

We investigate the surface thermophysical properties (thermal emissivity, thermal inertia, roughness fraction and geometric albedo) of asteroid (99942) Apophis, using the currently available mid-infrared observations from CanariCam on Gran Telescopio CANARIAS and far-infrared data from PACS on Herschel, based on the Advanced Thermophysical Model. …

Searching for initial stage of massive star formation around the H II region G18.2-0.3

Zhang, Chuan-Peng; Wang, Jun-Jie; Yuan, Jing-Hua +6 more

Sometimes, early star formation can be found in cold and dense molecular clouds, such as an infrared dark cloud. Considering that star formation often occurs in clusters, H II regions may be triggering a new generation of star formation, so we can search for the initial stage of massive star formation around H II regions. Based on the above, this …

Gas emission and dynamics in the infrared dark cloud G31.23+0.05

Zhang, Chuan-Peng; Wang, Jun-Jie; Xu, Jin-Long +1 more

We performed a multiwavelength study towards the infrared dark cloud (IRDC) G31.23+0.05 with new CO observations from Purple Mountain Observatory and archival data (the GLIMPSE, MIPSGAL, HERSCHEL, ATLASGAL, BGPS and NVSS surveys). From these observations, we identified three IRDCs with systemic velocities of 108.36+/- 0.06 (cloud A), 104.22+/- 0.1…

Multi-transition study of the peculiar merger Arp 299

Zhu, Ming; Jiao, Qian

We present a multi-transition study to investigate the physical properties of dust and molecular gas in the archetypical merger Arp 299 by using data including James Clerk Maxwell Telescope (JCMT) 850 and 450 µm observations, Herschel 500, 350, 250, 160 and 70 µm continuum maps, as well as the CO(3-2), CO(4-3) low-J CO lines and CO(11-…