A New Catalog of Am-type Chemically Peculiar Stars Based on LAMOST
A total of about 21,600 Am candidates were detected with the MKCLASS code based on the low-resolution spectra of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope Data Releases 8 (v1.0), 9 (v0), and 10 (v0), which greatly expands the database of Am-type stars. By crossmatching the known...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal Supplement Series |
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| Online Access: | https://doi.org/10.3847/1538-4365/acc4b5 |
| _version_ | 1797695289394462720 |
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| author | Xiao-man Tian Zhi-hua Wang Li-ying Zhu Xiao-Ling Yang |
| author_facet | Xiao-man Tian Zhi-hua Wang Li-ying Zhu Xiao-Ling Yang |
| author_sort | Xiao-man Tian |
| collection | DOAJ |
| description | A total of about 21,600 Am candidates were detected with the MKCLASS code based on the low-resolution spectra of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope Data Releases 8 (v1.0), 9 (v0), and 10 (v0), which greatly expands the database of Am-type stars. By crossmatching the known catalogs of Am stars and our Am candidates with the AAVSO International Variable Star Index catalog, a catalog of the largest eclipsing Am binaries was obtained, which includes 754 binaries and provides a substantial sample with which to study Am stars. Fundamental information, including atmospheric parameters of the two kinds of candidates, are collected and listed in the catalogs, such as temperature, log g , and metallicity. We further carried out statistical analysis of the types of parameters. In our new catalog, there are some Am candidates with a temperature lower than 7000 K and some eclipsing Am binary candidates with a period of less than 1 day, which poses challenges to the slow rotation of stars classified as type Am observed in previous research. These candidates are significant and provide a great opportunity to explore the real relationship between Am-type stars’ peculiarity and slow stellar rotation. The Hertzsprung–Russell diagram of Am stars and the primary stars of eclipsing Am binary candidates indicate that a majority of the Am stars and almost all primary stars of binaries are in or around the main-sequence evolution stage. |
| first_indexed | 2024-03-12T03:10:16Z |
| format | Article |
| id | doaj.art-764b2ccd72e3421589450d90a0844825 |
| institution | Directory Open Access Journal |
| issn | 0067-0049 |
| language | English |
| last_indexed | 2024-03-12T03:10:16Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Supplement Series |
| spelling | doaj.art-764b2ccd72e3421589450d90a08448252023-09-03T14:27:53ZengIOP PublishingThe Astrophysical Journal Supplement Series0067-00492023-01-0126611410.3847/1538-4365/acc4b5A New Catalog of Am-type Chemically Peculiar Stars Based on LAMOSTXiao-man Tian0https://orcid.org/0000-0002-1775-2079Zhi-hua Wang1Li-ying Zhu2Xiao-Ling Yang3School of Aeronautics, Shandong Jiaotong University , 5001 Haitang Road, Changqing District, 250000 Jinan, People's Republic of China ; txmjlx2018@163.comSchool of Mathematics and Information Sciences, Yantai University , 30 Qingquan Road, Laishan District, 264005 Yantai, People's Republic of ChinaKey Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences , P.O. Box 110, 650216 Kunming, People's Republic of China; University of the Chinese Academy of Science , Yuquan Road 19, Sijingshang Block, 100049 Beijing, People's Republic of ChinaSchool of Aeronautics, Shandong Jiaotong University , 5001 Haitang Road, Changqing District, 250000 Jinan, People's Republic of China ; txmjlx2018@163.comA total of about 21,600 Am candidates were detected with the MKCLASS code based on the low-resolution spectra of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope Data Releases 8 (v1.0), 9 (v0), and 10 (v0), which greatly expands the database of Am-type stars. By crossmatching the known catalogs of Am stars and our Am candidates with the AAVSO International Variable Star Index catalog, a catalog of the largest eclipsing Am binaries was obtained, which includes 754 binaries and provides a substantial sample with which to study Am stars. Fundamental information, including atmospheric parameters of the two kinds of candidates, are collected and listed in the catalogs, such as temperature, log g , and metallicity. We further carried out statistical analysis of the types of parameters. In our new catalog, there are some Am candidates with a temperature lower than 7000 K and some eclipsing Am binary candidates with a period of less than 1 day, which poses challenges to the slow rotation of stars classified as type Am observed in previous research. These candidates are significant and provide a great opportunity to explore the real relationship between Am-type stars’ peculiarity and slow stellar rotation. The Hertzsprung–Russell diagram of Am stars and the primary stars of eclipsing Am binary candidates indicate that a majority of the Am stars and almost all primary stars of binaries are in or around the main-sequence evolution stage.https://doi.org/10.3847/1538-4365/acc4b5Chemically peculiar starsAm starsMultiple starsAstrometric binary starsEclipsing binary stars |
| spellingShingle | Xiao-man Tian Zhi-hua Wang Li-ying Zhu Xiao-Ling Yang A New Catalog of Am-type Chemically Peculiar Stars Based on LAMOST The Astrophysical Journal Supplement Series Chemically peculiar stars Am stars Multiple stars Astrometric binary stars Eclipsing binary stars |
| title | A New Catalog of Am-type Chemically Peculiar Stars Based on LAMOST |
| title_full | A New Catalog of Am-type Chemically Peculiar Stars Based on LAMOST |
| title_fullStr | A New Catalog of Am-type Chemically Peculiar Stars Based on LAMOST |
| title_full_unstemmed | A New Catalog of Am-type Chemically Peculiar Stars Based on LAMOST |
| title_short | A New Catalog of Am-type Chemically Peculiar Stars Based on LAMOST |
| title_sort | new catalog of am type chemically peculiar stars based on lamost |
| topic | Chemically peculiar stars Am stars Multiple stars Astrometric binary stars Eclipsing binary stars |
| url | https://doi.org/10.3847/1538-4365/acc4b5 |
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