Miras as a distance indicator in the CSST, JWST, and Gaia era

Frontiers in Astronomy and Space Sciences

Astronomy and Space Sciences

Shuangjing Xu¹  Hao Ding²  Bo Zhang²  Shiming Wen²  Yan Sun²  Jingdong Zhang³  Xiaofeng Mai³  Wen Chen⁴ 

[1] Korea Astronomy and Space Science Institute, Daejeon, Republic of Korea;Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, China;Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, China;University of Chinese Academy of Sciences, Beijing, China;Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan, China;Yunnan Key Laboratory of the Solar physics and Space Science, Kunming, China;

关键词: AGB stars;    Mira variable stars;    Milky Way;    period–luminosity relation;    distance indicators;   

DOI  :  10.3389/fspas.2023.1232151

 received in 2023-05-31, accepted in 2023-07-03,  发布年份 2023

来源: Frontiers

【 摘 要 】

Mira variables are important distance indicators owing to the clear period–luminosity relation at infrared wavelengths. We have compiled a sample of 343 Galactic Miras selected from the American Association of Variable Star Observers database and Gaia Data Release 3. We used V-band observations from the American Association of Variable Star Observers to generate template light curves and derived mean magnitudes in the near-infrared JHK band from the Two Micron All-Sky Survey. Based on the Gaia-Two Micron All-Sky Survey diagram and the Gaia-LPV2 catalog, we classified 299 O-rich and 44 C-rich Miras. We fitted the Galactic period–luminosity relations for O-rich Miras in the near-infrared JHK band and estimated slopes (–2.74 ± 0.32, –3.14 ± 0.30, and –3.50 ± 0.25) and zero points (–5.58 ± 0.06 mag, –6.40 ± 0.06 mag, and –6.84 ± 0.05 mag) defined at logP (days) = 2.30, separately. Although the uncertainties of our derived Galactic PLRs for Miras are still larger than those of other galaxies, the multi-band sky survey conducted using the China Space Survey Telescope could help build more reliable and accurate PLRs for Miras, particularly in a near-infrared y band (927–1,080 nm).

【 授权许可】

Unknown   
Copyright © 2023 Sun, Zhang, Zhang, Xu, Mai, Ding, Chen and Wen.