KFU. Card publication. The intensities of Balmer lines in low resolution integrated light spectra of globular clusters

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THE INTENSITIES OF BALMER LINES IN LOW RESOLUTION INTEGRATED LIGHT SPECTRA OF GLOBULAR CLUSTERS

Form of presentation

Articles in international journals and collections

Year of publication

2022

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Authors, employees of KFU

Shimanskiy Vladislav Vladimirovich, author

Bibliographic description in the original language

Sharina M, Maricheva M, Shimanskii V., The intensities of Balmer lines in low resolution integrated light spectra of globular clusters//Proceedings of Science. - 2022. - Vol.425, Is.. - Art. �020.

Annotation

We introduce a study of the depths and widths of Balmer absorption lines in low resolution (Δ𝜆/𝜆 ∼ 1000) integrated light (IL) spectra of globular clusters (GCs) depending on the following parameters: age, metallicity (Z) and helium mass fraction (Y). The parameters of stellar atmospheres used to calculate synthetic IL spectra of GCs are set by theoretical isochrones of stellar evolution. As the age increases, the luminosities and effective temperatures of the Main sequence turnoff stars decrease. The analysis of low resolution spectra demonstrates that the depths and widths of the Balmer absorption lines H𝛿, H𝛾 and H𝛽 in IL spectra of GCs decrease accordingly. On the other hand, as the contribution of hot blue horizontal branch (HB) stars in IL spectra becomes more and more significant, the depths and widths of hydrogen lines increase. These changes are non-monotonic. In this paper we explore characteristics of these changes in spectra of GCs with Z=0.002. Our study contributes to the progress of the research on the properties of HB stars, the contribution of their radiation to IL spectra of GCs and the accuracy of determination of ages and Y for GCs in galaxies.

Keywords

globular clusters, stellar atmospheres

The name of the journal

Proceedings of Science

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85144593690&partnerID=40&md5=43b7963925aa789c6505ff563bcc5e50

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=280147&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Shimanskiy Vladislav Vladimirovich	ru_RU
dc.date.accessioned	2022-01-01T00:00:00Z	ru_RU
dc.date.available	2022-01-01T00:00:00Z	ru_RU
dc.date.issued	2022	ru_RU
dc.identifier.citation	Sharina M, Maricheva M, Shimanskii V., The intensities of Balmer lines in low resolution integrated light spectra of globular clusters//Proceedings of Science. - 2022. - Vol.425, Is.. - Art. �020.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=280147&p_lang=2	ru_RU
dc.description.abstract	Proceedings of Science	ru_RU
dc.description.abstract	We introduce a study of the depths and widths of Balmer absorption lines in low resolution (Δ𝜆/𝜆 ∼ 1000) integrated light (IL) spectra of globular clusters (GCs) depending on the following parameters: age, metallicity (Z) and helium mass fraction (Y). The parameters of stellar atmospheres used to calculate synthetic IL spectra of GCs are set by theoretical isochrones of stellar evolution. As the age increases, the luminosities and effective temperatures of the Main sequence turnoff stars decrease. The analysis of low resolution spectra demonstrates that the depths and widths of the Balmer absorption lines H𝛿, H𝛾 and H𝛽 in IL spectra of GCs decrease accordingly. On the other hand, as the contribution of hot blue horizontal branch (HB) stars in IL spectra becomes more and more significant, the depths and widths of hydrogen lines increase. These changes are non-monotonic. In this paper we explore characteristics of these changes in spectra of GCs with Z=0.002. Our study contributes to the progress of the research on the properties of HB stars, the contribution of their radiation to IL spectra of GCs and the accuracy of determination of ages and Y for GCs in galaxies.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	globular clusters	ru_RU
dc.subject	stellar atmospheres	ru_RU
dc.title	The intensities of Balmer lines in low resolution integrated light spectra of globular clusters	ru_RU
dc.type	Articles in international journals and collections	ru_RU