The Origin of Young Stellar Populations in NGC 1783: Accretion of External Stars
The presence of young stellar populations in the Large Magellanic Cloud cluster NGC 1783 has caught significant attention, with suggestions ranging from it being a genuine secondary stellar generation to a population of blue straggler stars or simply contamination from background stars. Thanks to mu...
| Автори: | , , , , , , |
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| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
IOP Publishing
2024-01-01
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| Серія: | The Astrophysical Journal |
| Предмети: | |
| Онлайн доступ: | https://doi.org/10.3847/1538-4357/ad499c |
| _version_ | 1827212548430102528 |
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| author | Li Wang Licai Deng Xiaoying Pang Long Wang Richard de Grijs Antonino P. Milone Chengyuan Li |
| author_facet | Li Wang Licai Deng Xiaoying Pang Long Wang Richard de Grijs Antonino P. Milone Chengyuan Li |
| author_sort | Li Wang |
| collection | DOAJ |
| description | The presence of young stellar populations in the Large Magellanic Cloud cluster NGC 1783 has caught significant attention, with suggestions ranging from it being a genuine secondary stellar generation to a population of blue straggler stars or simply contamination from background stars. Thanks to multiepoch observations with the Hubble Space Telescope, proper motions for stars within the field of NGC 1783 have been derived, thus allowing accurate cluster membership determination. Here, we report that the younger stars within NGC 1783 indeed belong to the cluster and their spatial distribution is more extended compared to the bulk of the older stellar population, consistent with previous studies. Through N -body simulations, we demonstrate that the observed characteristics of the younger stars cannot be explained solely by blue straggler stars in the context of the isolated dynamical evolution of NGC 1783. Instead, accretion of the external, low-mass stellar system can better account for both the inverse spatial concentration and the radial velocity isotropy of the younger stars. We propose that NGC 1783 may have accreted external stars from low-mass stellar systems, resulting in a mixture of external younger stars and blue straggler stars from the older bulk population, thereby accounting for the characteristics of the younger sequence. |
| first_indexed | 2025-03-21T14:01:18Z |
| format | Article |
| id | doaj.art-e4fd3a2c9f8045fe872baea2269be912 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2025-03-21T14:01:18Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-e4fd3a2c9f8045fe872baea2269be9122024-06-25T16:06:06ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-0196912110.3847/1538-4357/ad499cThe Origin of Young Stellar Populations in NGC 1783: Accretion of External StarsLi Wang0https://orcid.org/0000-0003-3471-9489Licai Deng1https://orcid.org/0000-0001-9073-9914Xiaoying Pang2https://orcid.org/0000-0003-3389-2263Long Wang3https://orcid.org/0000-0001-8713-0366Richard de Grijs4https://orcid.org/0000-0002-7203-5996Antonino P. Milone5https://orcid.org/0000-0001-7506-930XChengyuan Li6https://orcid.org/0000-0002-3084-5157School of Physics and Astronomy, Sun Yat-sen University , Daxue Road, Zhuhai 519082, People’s Republic of China ; lichengy5@mail.sysu.edu.cn; CSST Science Center for the Guangdong–Hong Kong–Macau Greater Bay Area , Zhuhai 519082, People’s Republic of ChinaKey Laboratory for Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People’s Republic of China; School of Astronomy and Space Science, University of Chinese Academy of Sciences , Beijing 100049, People’s Republic of China; Department of Astronomy, School of Physics and Astronomy, China West Normal University , Nanchong 637002, People’s Republic of ChinaDepartment of Physics, Xi’an Jiaotong–Liverpool University , 111 Ren’ai Road, Dushu Lake Science and Education Innovation District, Suzhou 215123, Jiangsu Province, People’s Republic of China; Shanghai Key Laboratory for Astrophysics, Shanghai Normal University , 100 Guilin Road, Shanghai 200234, People’s Republic of ChinaSchool of Physics and Astronomy, Sun Yat-sen University , Daxue Road, Zhuhai 519082, People’s Republic of China ; lichengy5@mail.sysu.edu.cn; CSST Science Center for the Guangdong–Hong Kong–Macau Greater Bay Area , Zhuhai 519082, People’s Republic of ChinaSchool of Mathematical and Physical Sciences, Macquarie University , Balaclava Road, Sydney, NSW 2109, Australia; Astrophysics and Space Technologies Research Centre, Macquarie University , Balaclava Road, Sydney, NSW 2109, Australia; International Space Science Institute–Beijing , 1 Nanertiao, Zhongguancun, Hai Dian District, Beijing 100190, People’s Republic of ChinaDipartimento di Fisica e Astronomia “Galileo Galilei”, Univ. di Padova , Vicolo dell’Osservatorio 3, Padova, IT-35122, Italy; Istituto Nazionale di Astrofisica—Osservatorio Astronomico di Padova , Vicolo dell’Osservatorio 5, Padova, IT-35122, ItalySchool of Physics and Astronomy, Sun Yat-sen University , Daxue Road, Zhuhai 519082, People’s Republic of China ; lichengy5@mail.sysu.edu.cn; CSST Science Center for the Guangdong–Hong Kong–Macau Greater Bay Area , Zhuhai 519082, People’s Republic of ChinaThe presence of young stellar populations in the Large Magellanic Cloud cluster NGC 1783 has caught significant attention, with suggestions ranging from it being a genuine secondary stellar generation to a population of blue straggler stars or simply contamination from background stars. Thanks to multiepoch observations with the Hubble Space Telescope, proper motions for stars within the field of NGC 1783 have been derived, thus allowing accurate cluster membership determination. Here, we report that the younger stars within NGC 1783 indeed belong to the cluster and their spatial distribution is more extended compared to the bulk of the older stellar population, consistent with previous studies. Through N -body simulations, we demonstrate that the observed characteristics of the younger stars cannot be explained solely by blue straggler stars in the context of the isolated dynamical evolution of NGC 1783. Instead, accretion of the external, low-mass stellar system can better account for both the inverse spatial concentration and the radial velocity isotropy of the younger stars. We propose that NGC 1783 may have accreted external stars from low-mass stellar systems, resulting in a mixture of external younger stars and blue straggler stars from the older bulk population, thereby accounting for the characteristics of the younger sequence.https://doi.org/10.3847/1538-4357/ad499cStar clustersStellar kinematicsBlue straggler starsN-body simulations |
| spellingShingle | Li Wang Licai Deng Xiaoying Pang Long Wang Richard de Grijs Antonino P. Milone Chengyuan Li The Origin of Young Stellar Populations in NGC 1783: Accretion of External Stars The Astrophysical Journal Star clusters Stellar kinematics Blue straggler stars N-body simulations |
| title | The Origin of Young Stellar Populations in NGC 1783: Accretion of External Stars |
| title_full | The Origin of Young Stellar Populations in NGC 1783: Accretion of External Stars |
| title_fullStr | The Origin of Young Stellar Populations in NGC 1783: Accretion of External Stars |
| title_full_unstemmed | The Origin of Young Stellar Populations in NGC 1783: Accretion of External Stars |
| title_short | The Origin of Young Stellar Populations in NGC 1783: Accretion of External Stars |
| title_sort | origin of young stellar populations in ngc 1783 accretion of external stars |
| topic | Star clusters Stellar kinematics Blue straggler stars N-body simulations |
| url | https://doi.org/10.3847/1538-4357/ad499c |
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