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astro-ph.SR2020
On the Encounter Desorption of Hydrogen Atoms on Ice Mantle
Qiang Chang, Xuli Zheng, Xia Zhang +5
At low temperatures (10 K), hydrogen atoms can diffuse quickly on grain ice mantles and frequently encounter hydrogen molecules, which cover a notable fraction of grain surface. Th…
astro-ph.SR2018
The Chemical Evolution from Prestellar to Protostellar Cores: A New Multiphase Model With Bulk Diffusion and Photon Penetration
Yang Lu, Qiang Chang, Yuri Aikawa
We investigate the chemical evolution of a collapsing core that starts from a hydrostatic core and finally form a low-mass protostar. New multiphase gas-grain models that include b…