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作 者:穆子豪 沈世银[1,3] Rafael S.de Souza Ana L.Chies-Santos MU Zi-hao;SHEN Shi-yin;Rafael S.de Souza;Ana L.Chies-Santos(Key Laboratory for Research in Galaxies and Cosmology,Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Lab for Astrophysics,Shanghai 200034,China;Centre for Astrophysics Research,University of Hertfordshire,College Lane,Hat eld AL109AB,UK;Instituto de Fisica,Universidade Federal do Rio Grande do Sul(UFRGS),Av.Bento Goncalves,Porto Alegre 9500,Brazil)
机构地区:[1]中国科学院上海天文台星系宇宙学重点实验室,上海200030 [2]中国科学院大学,北京100049 [3]星系和宇宙学半解析研究重点实验室,上海200034 [4]赫特福德大学天体物理研究中心,英国哈特菲尔德学院巷,AL109AB [5]南里奥格兰德州联邦大学科学研究所,巴西阿雷格里港,9500
出 处:《天文学进展》2024年第1期115-127,共13页Progress In Astronomy
基 金:国家重点研发计划(2022YFF0503402);载人航天项目(CMS-CSST-2021-A07);上海市优秀学术带头人计划(22XD1404200)。
摘 要:盘状星系中的棒结构特征与星系自身所处环境及整体恒星形成特征之间存在复杂的相互关系。利用细致的星系形态特征测量计划Galaxy Zoo DECaLS中的数据构建了一组目前最大的具有同样恒星质量分布的强棒、弱棒和无棒星系样本。通过引入星系所处暗晕质量及相空间特征来控制星系所处的环境效应之后,进一步对比研究强棒、弱棒和无棒星系的恒星形成特征。研究表明,有棒星系中的恒星形成熄灭的比例系统地高于无棒星系,且强棒的效应更为明显。但是,对于仍处于恒星形成主序上的星系来说,强棒、弱棒和无棒星系的恒星形成特征并没有显著差别。以上结果表明,星系中的棒特征在其存在的时标中可能使部分星系迅速地从恒星形成转入熄灭状态。The bar structure of disk galaxies,their environment,and overall star formation properties are known to be intricately linked.By utilizing data from the Galaxy Zoo DECaLS program,we have assembled the largest sample of strong bar,weak bar,and no bar galaxies with matching stellar mass distributions.We analyzed the specific star formation rates(sSFR)of these galaxies after controlling for environmental effects by matching the halo mass and phase space diagram of the dark matter halo in which the galaxy resides.Our findings suggest that the percentage of quenched galaxies in the barred galaxy sample is consistently higher than that in non-bar galaxies,with a more pronounced effect for strong bar galaxies.However,for galaxies that are still on the star formation main sequence,there is no significant difference in their sSFR distribution.These results suggest that the presence of a bar in a galaxy may rapidly transition some galaxies from being star-forming to quenched in a short period of time.
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