Investigating Sulfur Chemistry in the HD163296 Disk  

作　　者：Rong Ma Donghui Quan Yan Zhou Jarken Esimbek Dalei Li Xiaohu Li Xia Zhang Juan Tuo Yanan Feng 

机构地区：[1]Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Research Center for Intelligent Computing Platforms,Zhejiang Laboratory,Hangzhou 311100,China [4]BinZhou University,Binzhou 256600,China [5]Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Urumqi 830011,China [6]Xinjiang Key Laboratory of Radio Astrophysics,Urumqi 830011,China

出　　处：《Research in Astronomy and Astrophysics》2024年第7期215-225,共11页天文和天体物理学研究（英文版）

基　　金：funded by the National Natural Science Foundation of China(NSFC)under NSFC Nos.12373026,11973075,12203091,and 12173075;the National Key R&D Program of China under grant No.2022YFA1603103;the Natural Science Foundation of Xinjiang Uygur Autonomous Region of China(2022D01A156);the“Tianchi Doctoral Program 2021”;supported by the Youth Innovation Promotion Association CAS。

摘　　要：Sulfur chemistry in the formation process of low-mass stars and planets remains poorly understood.The protoplanetary disks are the birthplace of planets and its distinctive environment provides an intriguing platform for investigating models of sulfur chemistry.We analyzed the Atacama Large Millimeter/submillimeter Array observations of CS 7-6 transitions in the HD 163296 disk and performed astrochemical modeling to explore its sulfur chemistry.We simulated the distribution of sulfur-containing molecules and compared it with observationally deduced fractional column densities.We have found that the simulated column density of CS is consistent with the observationally deduced fractional column densities,while the simulated column density of C_(2)S is lower than the observationally deduced upper limits on column densities.This results indicate that we have a good understanding of the chemical properties of CS and C_(2)S in the disk.We also investigated the influence of the C/O ratio on sulfur-containing molecules and found that the column densities of SO,SO_(2),and H_2S near the centra star are dependent on the C/O ratio.Additionally,we found that the N[CS]/N[SO]ratio can serve as a promising indicator of the disk’s C/O ratio in HD 163296.Overall,the disk of HD 163296 provides a favorable environmen for the detection of sulfur-containing molecules.

关 键 词：Protoplanetary Disks-Astrochemistry-Molecular Processes 

分 类 号：P148[天文地球—天体物理]