首页|Prospects of the Multi-channel Photometric Survey Telescope in the Cosmological Application of Type Ⅰa Supernovae

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

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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 supemovae(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 supemovae at low-z and improve the calibration accuracy of high-z SNe Ia.

(stars:)supernovae:general(cosmology:)cosmological parameterstelescopes

Zhenyu Wang、Jujia Zhang、Xinzhong Er、Jinming Bai

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Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China

University of Chinese Academy of Sciences,Beijing 100049,China

Key Laboratory for the Structure and Evolution of Celestial Objects,Chinese Academy of Sciences,Kunming 650216,China

International Centre of Supemovae,Yunnan Key Laboratory,Kunming 650216,China

South-Western Institute for Astronomy Research,Yunnan University,Kunming 650500,China

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National Key R&D Program of ChinaNational Natural Science Foundation of China(NSFC)science research grants from the China Manned Space ProjectYunnan Province FoundationTopnotch Young Talents Program of Yunnan ProvinceLight of West China Program provided by the Chinese Academy of SciencesInternational Centre of Supernovae,Yunnan Key LaboratoryCASPeople's Government of Yunnan ProvinceYunnan University Development Plan for World-Class UniversityYunnan University Development Plan for World-Class Astronomy Disciplinethe"Science & Technology Champion Project"two"Team Projects"—the"Innovation Team"the"Top Team"Yunnan Revitalization Talent Support Program

2021YFA160040412173082CMS-CSST-2021-A 12202201AT070069202302AN360001202005AB160002202105AE160021202305AT350002

2024

10.1088/1674-4527/ad339f

天文和天体物理学研究
中国科学院国家天文台

天文和天体物理学研究

CSTPCD
影响因子：0.406
ISSN：1674-4527
年,卷(期)：2024.24(4)