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The MAGIC Project. I. High-Resolution Spectroscopy on Salt Telescope and the Cepheid RS Nor as a Test Objectстатья Исследовательская статья
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 24 июля 2019 г.
- Авторы: Kniazev A.Yu, Usenko I.A., Kovtyukh V.V., Berdnikov L.N.
- Журнал: Astrophysical Bulletin
- Том: 74
- Номер: 2
- Год издания: 2019
- Первая страница: 208
- Последняя страница: 220
- DOI: 10.1134/S199034131902010X
- Аннотация: We briefly describe the large observational project MAGIC aimed at mass spectroscopicstudies of stars of different subsystems of our Galaxy. The project was carried out on the SouthernAfrican Large Telescope (hereafter referred to as SALT) with efficient use of its capabilities, site’s climate,and spectroscopic instruments. We discuss in detail the issues of high-resolution spectroscopy whenstudying the chemical composition of Galactic Cepheids. Observations of these objects with HRS echellespectrographofSALTtelescopestarted in 2016 and currentlythe numberofsuchobservationsexceedsonehundred. Spectra were acquired in the medium-resolution mode (R ∼ 36500–39000)with a high signal-to-noise ratio (S/N ∼50–220). All obtained echelle images acquired were reduced with a package thatwe developed based on standard MIDAS system. We describe standard reduction steps using the CepheidRSNor as a test object. Based on the data of spectroscopic observations we determined the atmosphericparameters and the abundances of 31 chemical elements (36 neutral atoms and ions) whose absorptionlines are observed in the spectrum of RSNor. We performed all computations using two methods andshowed that echelle spectra acquired in the medium-resolution mode of HRS can be used to study thechemical composition of Cepheids with good accuracy and that the results agree with the results of otherstudies within the quoted errors.
- Добавил в систему: Бердников Леонид Николаевич