From evolved Long-Period-Variable stars to the evolution of M31

Torki, Maryam; Navabi, Mahdieh; Javadi, Atefeh; Saremi, Elham; Loon, Jacco Th. van; Ghaziasgar, Sepideh

doi:10.1017/s1743921322001405

Cited by 1 publication

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“…In this research, we took advantage of the catalogue of long period variable stars (LPVs) in the M31 from Mould et al 2004 to estimate its star formation history (Torki et al 2019(Torki et al , 2023. Infrared photometry of the M31 has been obtained by Kitt Peak National…”

Section: Datamentioning

confidence: 99%

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

2021

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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.

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Section: Datamentioning

confidence: 99%