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Spatial variation of the star formation history in the disc of M31 galaxy using evolved stars

Published online by Cambridge University Press:  09 June 2023

Maryam Torki Open the ORCID record for Maryam Torki [Opens in a new window] ,
Mahdieh Navabi  and
Atefeh Javadi Open the ORCID record for Atefeh Javadi [Opens in a new window]
Maryam Torki
Affiliation:
School of Astronomy, Institute for Research in Fundamental Sciences (IPM), Tehran, 19568-36613, Iran email: [email protected]
Mahdieh Navabi
Affiliation:
Physics Department, University of Surrey, Guildford, GU2 7XH, United Kingdon
Atefeh Javadi
Affiliation:
School of Astronomy, Institute for Research in Fundamental Sciences (IPM), Tehran, 19568-36613, Iran email: [email protected]
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Abstract

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The rate of star formation (SFR) is one of the important quantities that helps to study galaxies’ evolutionary path. In fact, measuring the SFR during the life of the Universe shows us how galaxies have acquired their metallicity and star mass. In this regard, the galaxies of the Local Group give us a great opportunity to study the connection between different stellar populations and galaxy evolution. In this paper, we use the Long-Period variable stars to estimate the radial star formation in the disc of the M31 galaxy. These stars are powerful instruments to achieve this goal. They reach their peak luminosity and coldest state at the final point of their evolution. Also, there is a directly related between their mass and luminosity, so using stellar evolution theoretical models, we construct the mass function and hence the star formation history (SFH). In the disc of M31, we see an increase in the rate of star formation and a decrease in the age of stars in the outer parts. These results predict the inside-out growth well.

Keywords

stars: evolutionstars: AGB and LPVsstars: luminosity function mass functiongalaxies: stellar contentgalaxies: structuregalaxies: evolutiongalaxies: formationgalaxies: individual: M31
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 17 , Symposium S373: Resolving the Rise and Fall of Star Formation in Galaxies , August 2021 , pp. 278 - 280
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Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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