Understanding the Activity Performance of Comets 38P/Stephan-Oterma,64P/Swift-Gehrels and C/2017 M4(ATLAS)through Broadband Photometric Observations

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外文摘要：In this work,we report observations of three comets:38P/Stephan-Oterma,64P/Swift-Gehrels,and C/2017 M4(ATLAS),conducted with the Nanshan one-meter wide-field telescope in 2018 August and November,and 2019 January.We extracted morphological features through image enhancement techniques and calculated the dust activity parameter,Afρ,along with dust mass loss rates and coma color indices using broadband photometric data.Our morphological analysis uncovered a spectrum of dust characteristics among the observed comets,ranging from a significant twisted structure in comet 38P/Stephan-Oterma's coma to the regular coma envelope surrounding comet 64P/Swift-Gehrels.The Afρ values varied between 148.8±0.3 cm for 64P/Swift-Gehrels and 1118.5±6.2 cm for C/2017 M4(ATLAS)(measured within a reference aperture radius of ρ=6"),indicating a range from moderate to high activity levels.Dust mass loss rates were estimated from 328.1 kg s-1 for comet 64P/Swift-Gehrels to 1395.5 kg s-1 for comet C/2017 M4(ATLAS).The color indices of comets 38P/Stephan-Oterma and C/2017 M4(ATLAS)closely resemble the average colors of active short-period comets and active long-period comets,respectively.In contrast,64P/Swift-Gehrels exhibits a significantly bluer hue than typical Jupiter family comets.

外文关键词：

comets:generalcomets:individual(38P/Stephan-Oterma,64P/Swift-Gehrels,C/2017 M4(ATLAS))techniques:photometric

作者：

Xuan Zhang、Jin-Zhong Liu、Le-Tian Wang

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作者单位：

Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China

基金：

Natural Science Foundation of Xinjiang Uygur Autonomous Region of ChinaTianshan Talent Training Program

项目编号：

2021D01B1122023TSYCCX0101

出版年：

2024

DOI：

10.1088/1674-4527/ad6350

天文和天体物理学研究

中国科学院国家天文台

天文和天体物理学研究

CSTPCD

影响因子：0.406

ISSN：1674-4527

年,卷(期)：2024.24(8)