LAMOST Reveals Long-lived Protoplanetary Disks
While both observations and theories demonstrate that protoplanetary disks are not expected to live much longer than ∼10 Myr, several examples of prolonged disks have been observed in the past. In this work, we perform a systematic search for aged young stellar objects still surrounded by protoplane...
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| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astronomical Journal |
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| Online Access: | https://doi.org/10.3847/1538-3881/ada8a7 |
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| author | Xiao-Long Wang Min Fang Yao Liu Miao-Miao Zhang Wen-Yuan Cui |
| author_facet | Xiao-Long Wang Min Fang Yao Liu Miao-Miao Zhang Wen-Yuan Cui |
| author_sort | Xiao-Long Wang |
| collection | DOAJ |
| description | While both observations and theories demonstrate that protoplanetary disks are not expected to live much longer than ∼10 Myr, several examples of prolonged disks have been observed in the past. In this work, we perform a systematic search for aged young stellar objects still surrounded by protoplanetary disks in the M-star catalog from the LAMOST archive. We identify 14 sources older than 10 Myr, still surrounded by protoplanetary disks and with ongoing accretion activities, significantly improving the census of the category known as the Peter Pan disks. The stellar parameters, variability, and accretion properties of these objects, as well as their spatial distribution, are investigated. Nearly all of these objects are distributed far away from nearby associations and star-forming regions but show evidence of being members of open clusters. Investigating the correlation between mass accretion rates and stellar masses, we find that these long-lived disks accrete at systematically lower levels, compared to their younger counterparts with similar stellar masses. Studying the evolution of mass accretion rates with stellar ages, we find that these aged disks follow a similar trend to young ones. |
| format | Article |
| id | doaj-art-9600e8a8d0d24ef4969f100809514c59 |
| institution | Kabale University |
| issn | 1538-3881 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj-art-9600e8a8d0d24ef4969f100809514c592025-02-12T07:35:59ZengIOP PublishingThe Astronomical Journal1538-38812025-01-01169314110.3847/1538-3881/ada8a7LAMOST Reveals Long-lived Protoplanetary DisksXiao-Long Wang0https://orcid.org/0000-0003-2536-3142Min Fang1https://orcid.org/0000-0001-8060-1321Yao Liu2https://orcid.org/0000-0002-7616-666XMiao-Miao Zhang3https://orcid.org/0000-0002-6388-649XWen-Yuan Cui4https://orcid.org/0000-0003-1359-9908Department of Physics, Hebei Normal University , Shijiazhuang 050024, People’s Republic of China ; xlwang@hebtu.edu.cn, cuiwenyuan@hebtu.edu.cn; Guo Shoujing Institute for Astronomy, Hebei Normal University , Shijiazhuang 050024, People's Republic of China; Hebei Advanced Thin Films Laboratory , Shijiazhuang 050024, People's Republic of ChinaPurple Mountain Observatory, Chinese Academy of Sciences , Nanjing 210023, People's Republic of China ; mfang@pmo.ac.cn; School of Astronomy and Space Science, University of Science and Technology of China , Hefei 230026, People's Republic of ChinaPurple Mountain Observatory, Chinese Academy of Sciences , Nanjing 210023, People's Republic of China ; mfang@pmo.ac.cn; School of Physical Science and Technology, Southwest Jiaotong University , Chengdu 610031, People's Republic of ChinaPurple Mountain Observatory, Chinese Academy of Sciences , Nanjing 210023, People's Republic of China ; mfang@pmo.ac.cnDepartment of Physics, Hebei Normal University , Shijiazhuang 050024, People’s Republic of China ; xlwang@hebtu.edu.cn, cuiwenyuan@hebtu.edu.cn; Guo Shoujing Institute for Astronomy, Hebei Normal University , Shijiazhuang 050024, People's Republic of ChinaWhile both observations and theories demonstrate that protoplanetary disks are not expected to live much longer than ∼10 Myr, several examples of prolonged disks have been observed in the past. In this work, we perform a systematic search for aged young stellar objects still surrounded by protoplanetary disks in the M-star catalog from the LAMOST archive. We identify 14 sources older than 10 Myr, still surrounded by protoplanetary disks and with ongoing accretion activities, significantly improving the census of the category known as the Peter Pan disks. The stellar parameters, variability, and accretion properties of these objects, as well as their spatial distribution, are investigated. Nearly all of these objects are distributed far away from nearby associations and star-forming regions but show evidence of being members of open clusters. Investigating the correlation between mass accretion rates and stellar masses, we find that these long-lived disks accrete at systematically lower levels, compared to their younger counterparts with similar stellar masses. Studying the evolution of mass accretion rates with stellar ages, we find that these aged disks follow a similar trend to young ones.https://doi.org/10.3847/1538-3881/ada8a7Young stellar objectsProtoplanetary disksStellar accretion disksHertzsprung Russell diagramCircumstellar disksSpectral energy distribution |
| spellingShingle | Xiao-Long Wang Min Fang Yao Liu Miao-Miao Zhang Wen-Yuan Cui LAMOST Reveals Long-lived Protoplanetary Disks The Astronomical Journal Young stellar objects Protoplanetary disks Stellar accretion disks Hertzsprung Russell diagram Circumstellar disks Spectral energy distribution |
| title | LAMOST Reveals Long-lived Protoplanetary Disks |
| title_full | LAMOST Reveals Long-lived Protoplanetary Disks |
| title_fullStr | LAMOST Reveals Long-lived Protoplanetary Disks |
| title_full_unstemmed | LAMOST Reveals Long-lived Protoplanetary Disks |
| title_short | LAMOST Reveals Long-lived Protoplanetary Disks |
| title_sort | lamost reveals long lived protoplanetary disks |
| topic | Young stellar objects Protoplanetary disks Stellar accretion disks Hertzsprung Russell diagram Circumstellar disks Spectral energy distribution |
| url | https://doi.org/10.3847/1538-3881/ada8a7 |
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