Prospects of the Multi-channel Photometric Survey Telescope in the Cosmological Application of Type Ia Supernovae  

作　　者：Zhenyu Wang Jujia Zhang Xinzhong Er Jinming Bai 

机构地区：[1]Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Key Laboratory for the Structure and Evolution of Celestial Objects,Chinese Academy of Sciences,Kunming 650216,China [4]International Centre of Supernovae,Yunnan Key Laboratory,Kunming 650216,China [5]South-Western Institute for Astronomy Research,Yunnan University,Kunming 650500,China

出　　处：《Research in Astronomy and Astrophysics》2024年第4期183-191,共9页天文和天体物理学研究（英文版）

基　　金：supported by the National Key R&D Program of China(2021YFA1600404);the National Natural Science Foundation of China(NSFC,grant No.12173082);science research grants from the China Manned Space Project(CMS-CSST-2021-A12);the Yunnan Province Foundation(202201AT070069);the Top-notch Young Talents Program of Yunnan Province;the Light of West China Program provided by the Chinese Academy of Sciences;the International Centre of Supernovae,Yunnan Key Laboratory(202302AN360001);Funding for the LJT has been provided by the CAS and the People’s Government of Yunnan Province;funded by the“Yunnan University Development Plan for World-Class University”;“Yunnan University Development Plan for World-Class Astronomy Discipline”;obtained supports from the“Science&Technology Champion Project”(202005AB160002);from two“Team Projects”—the“Innovation Team”(202105AE160021);the“Top Team”(202305AT350002);funded by the“Yunnan Revitalization Talent Support Program.”。

摘　　要：The Multi-channel Photometric Survey Telescope(Mephisto)is a real-time,three-color photometric system designed to capture the color evolution of stars and transients accurately.This telescope system can be crucial in cosmological distance measurements of low-redshift(low-z,z■0.1)Type Ia supernovae(SNe Ia).To optimize the capabilities of this instrument,we perform a comprehensive simulation study before its official operation is scheduled to start.By considering the impact of atmospheric extinction,weather conditions,and the lunar phase at the observing site involving the instrumental features,we simulate light curves of SNe Ia obtained by Mephisto.The best strategy in the case of SN Ia cosmology is to take the image at an exposure time of 130 s with a cadence of 3 days.In this condition,Mephisto can obtain hundreds of high-quality SNe Ia to achieve a distance measurement better than 4.5%.Given the on-time spectral classification and monitoring of the Lijiang 2.4 m Telescope at the same observatory,Mephisto,in the whole operation,can significantly enrich the well-calibrated sample of supernovae at low-z and improve the calibration accuracy of high-z SNe Ia.

关 键 词：(stars:)supernovae:general (cosmology:)cosmological parameters telescopes 

分 类 号：P14[天文地球—天体物理]