arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2311.04470astro-ph.GAastro-ph.COastro-ph.SR
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利用 OGLE-IV 星表中可用的造父变星确定大麦哲伦云的距离

Determinação da Distância à Grande Nuvem de Magalhães Através das Estrelas Variáveis Cefeidas Disponíveis no Catálogo OGLE-IV

Kevin Mota da Costa, Alan Miguel Velásquez, Julio Cesar Fabris

AI总结:

本文基于 OGLE-IV 的 4709 颗经典造父变星,采用改进的 Lomb-Scargle 周期图测定脉动周期,建立周光关系并结合独立校准推算大麦哲伦云距离模数。

摘要:

在本工作中,我们讨论利用 Leavitt 定律确定大麦哲伦云(LMC)的距离,所使用的数据来自观测项目 OGLE-IV(光学引力透镜实验变星合集)公开的经典造父变星星表,其中包含大麦哲伦云中的 4709 颗恒星。为确定造父变星的脉动周期,我们采用针对本文数据进行修改的计算算法 Lomb-Scargle periodogram(Lomb-Scargle 周期图)。此外,通过计算周期,我们可以导出大麦哲伦云中造父变星的周光关系,并利用独立的距离校准推导其距离模数。我们还讨论了变星振荡背后物理机制的一些一般理论概念。

英文摘要:

In this work, we discuss the determination of the distance to the Large Magellanic Cloud (LMC) using the Leavitt Law, utilizing the public catalog of Classical Cepheid Variable stars from the observational project OGLE-IV (The Optical Gravitational Lensing Experiment Collection of Variable Stars), consisting of 4709 stars in the Large Magellanic Cloud. To determine the pulsation period of Cepheid Variable stars, we employ the computational algorithm \textit{Lomb-Scargle periodogram} modified for our data. Additionally, with the calculation of the period, we can derive a period-luminosity relation for Cepheid Variables in the Large Magellanic Cloud and, using an independent calibration distance, deduce their distance moduli. We also discuss some general theoretical concepts of the physical mechanism behind the oscillation of variable stars.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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