An Ap Star Catalog Based on LAMOST DR9

被引:5
|
作者
Shi, Fangfei [1 ,2 ]
Zhang, Huawei [1 ,2 ]
Fu, Jianning [3 ,4 ]
Kurtz, Donald [5 ,6 ]
Xiang, Maosheng [4 ,7 ]
机构
[1] Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
[2] Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
[3] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
[4] Beijing Normal Univ, Inst Frontiers Astron & Astrophys, Beijing 102206, Peoples R China
[5] North West Univ, Ctr Space Res, Phys Dept, ZA-2745 Mahikeng, South Africa
[6] Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, England
[7] Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100101, Peoples R China
来源
ASTROPHYSICAL JOURNAL | 2023年 / 943卷 / 02期
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
CHEMICALLY PECULIAR STARS; STATISTICAL-ANALYSIS; DIFFUSION-PROCESSES; FLUX DEPRESSION; DELTA-ALPHA; CP STARS; PHOTOMETRY; ROAP; PULSATION; HGMN;
D O I
10.3847/1538-4357/aca89e
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a sample of 2700 Ap stars in the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) DR9 catalog. The candidates are first selected to be in a temperature range typical of Ap stars by using the BP - RP color index from Gaia DR3. Then the 5200 & Aring; flux depression features characteristic of Ap stars are visually checked in LAMOST DR9 spectra. The detailed spectral features are given by applying a modified spectral classification program, MKCLASS. The stellar parameters of these Ap stars, such as the T-eff, logg, [Fe/ H], [Si/H], and v sini, are either extracted from a hot star catalog or derived through empirical relations and then a statistical analysis is carried out. The evolutionary stages are also discussed. Finally, we discuss the rotation and pulsation features of those that have TESS or Kepler light curves. Among these Ap stars, we find seven new rotation variables, one new roAp star, and a new delta Scuti pulsation of a previously known roAp star.
引用
收藏
页数:12
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