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This study analyzes five star-bursting dwarf galaxies with off-centered clumps in the MaNGA survey, using stellar population synthesis (Fitting Analysis with Differential evolution Optimization) to derive spatially resolved star-formation histories. The resulting age-resolved g-band images reveal smooth structures for populations older than 1 Gyr and prominent, multi-location clumps for ages under 1 Gyr. Host images based on older age nodes place the five hosts between dEs and dIrrs, with galaxy 8257-3704 showing an event detectable only at a few hundred Myr.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/the-clumpy-structure-of-five-star-bursting-dwarf-galaxies-in-the-manga-survey/140083/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/the-clumpy-structure-of-five-star-bursting-dwarf-galaxies-in-the-manga-survey/140083.png","ImageObject",300,407,{"name":92,"@type":93},"Eden","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-09-21","2026-08-24",true,{"@type":102,"interactionType":103,"userInteractionCount":44},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is the main focus of this paper?","Question",{"text":112,"@type":113},"The paper investigates the clumpy structures in five star-bursting dwarf galaxies, emphasizing off-centered star-forming clumps and their evolutionary connections.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How are spatially resolved star-formation histories obtained?",{"text":117,"@type":113},"The authors use stellar population synthesis with Fitting Analysis using Differential evolution Optimization to derive the spatially resolved distribution of the star-formation history.",{"name":119,"@type":110,"acceptedAnswer":120},"What do the authors find when comparing images of different stellar-population ages?",{"text":121,"@type":113},"Populations older than 1 Gyr typically appear smooth, while populations younger than 1 Gyr show significant clumps, including multiple clumps at different locations and even different ages.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},140083,1787567590,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":44,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":129,"read_time":144},1374391974468,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","Research in Astronomy and Astrophysics, 24:025008 (21pp), 2024 February [https:](https://doi.org/10.1088/1674-4527/ad1046)[//](https://doi.org/10.1088/1674-4527/ad1046)[doi.org](https://doi.org/10.1088/1674-4527/ad1046)[/](https://doi.org/10.1088/1674-4527/ad1046)[10.1088](https://doi.org/10.1088/1674-4527/ad1046)[/](https://doi.org/10.1088/1674-4527/ad1046)[1674-4527](https://doi.org/10.1088/1674-4527/ad1046)[/](https://doi.org/10.1088/1674-4527/ad1046)[ad1046](https://doi.org/10.1088/1674-4527/ad1046)  \n© 2024 . National Astronomical Observatories, CAS and IOP Publishing Ltd. Printed in China and the U.K.  \nThe Clumpy Structure of Five Star-bursting Dwarf Galaxies in the MaNGA  \nSurvey  \nMengting Ju 1,2 , Jun Yin 1,3 , Lei Hao 1 , Chenxu Liu4 , Chao-Wei Tsai5,6,2 , Junfeng Wang7 , Zhengyi Shao 1,3  ,  \nShuai Feng8,9 , and Yu Rong 10   \n1 Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China  \n6  \n[mtju@shao.ac.cn](mtju@shao.ac.cn), [jyin@shao.ac.cn](jyin@shao.ac.cn), [haol@shao.ac.cn](haol@shao.ac.cn)  \n2 University of Chinese Academy of Sciences, Beijing 100049, China  \n3 Key Lab for Astrophysics, Shanghai 200034, China  \n4 South-Western Institute for Astronomy Research, Yunnan University, Kunming 650500, China  \n5 National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China  \nInstitute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing 102206, China  \n7 Department of Astronomy, Physics Building, Xiamen University, Xiamen, Fujian 361005, China  \n8 College of Physics, Hebei Normal University, Shijiazhuang 050024, China  \n9 Hebei Key Laboratory of Photophysics Research and Application, Shijiazhuang 050024, China  \n10 Department of Astronomy, University of Science and Technology of China, Hefei 230026, China  \nReceived 2023 September 27; revised 2023 November 16; accepted 2023 November 27; published 2024 January 31  \nAbstract  \nThe star-forming clumps in star-bursting dwarf galaxies provide valuable insights into understanding the evolution of dwarf galaxies. In this paper, we focus on five star-bursting dwarf galaxies featuring off-centered clumps in the Mapping Nearby Galaxies at Apache Point Observatory survey. Using the stellar population synthesis software Fitting Analysis using Differential evolution Optimization, we obtain the spatially resolved distribution of the star formation history, which allows us to construct the g-band images of the five galaxies at different ages. These images can help us to probe the evolution of the morphological structures of these galaxies. While images of a stellar population older than 1 Gyr are typically smooth, images of a stellar population younger than 1 Gyr reveal significant clumps, including multiple clumps which appear at different locations and even different ages. To study the evolutionary connections of these five galaxies to other dwarf galaxies before their star-forming clumps appear, we construct the images of the stellar populations older than three age nodes, and define them to be the images of the “host” galaxies. We find that the properties such as the central surface brightness and the effective radii of the hosts of the five galaxies are in between those of dwarf ellipticals (dEs) and dwarf irregulars (dIrrs), with two clearly more similar to dEs and one more similar to dIrrs. Among the five galaxies, 8257-3704 is particularly interesting, as it shows a previous starburst event that is not quite visible from its gri image, but only visible from images of the stellar population at a few hundred million years. The star-forming clump associated with this event may have appeared at around 600 Myr ago and disappeared at around 40 Myr ago.  \nKey words: galaxies: dwarf – galaxies: evolution – galaxies: formation – Galaxy: structure  \n1. Introduction  \nDwarf galaxies are the most abundant structures in the universe, and their unique propertie","cbCaiiC6j0PXVT4Y","https://ap.wps.com/l/cbCaiiC6j0PXVT4Y","pdf",3874998,21,"English","# Abstract\n# Key words\n# 1. Introduction","[{\"question\":\"What is the main focus of this paper?\",\"answer\":\"The paper investigates the clumpy structures in five star-bursting dwarf galaxies, emphasizing off-centered star-forming clumps and their evolutionary connections.\"},{\"question\":\"How are spatially resolved star-formation histories obtained?\",\"answer\":\"The authors use stellar population synthesis with Fitting Analysis using Differential evolution Optimization to derive the spatially resolved distribution of the star-formation history.\"},{\"question\":\"What do the authors find when comparing images of different stellar-population ages?\",\"answer\":\"Populations older than 1 Gyr typically appear smooth, while populations younger than 1 Gyr show significant clumps, including multiple clumps at different locations and even different ages.\"}]","The Clumpy Structure of Five Star-bursting Dwarf Galaxies in the MaNGA Survey | PDF",53]