Journals / Turkish Journal of Astronomy and Astrophysics / 2022 / Cilt: 3 - Sayı: 3

Investigation of Metallicity Gradient with GALAH and Gaia Data in the Milky Way

GALAH ve Gaia Verileriyle Samanyolu'nda Metal Bolluğu Gradyent Araştırması

Pages
43–51
Publication Date
2022-12-31
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

As a result, the findings obtained in the study support the two-infall model.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, metallicity abundance gradients for the thin disk population of the Milky Way were investigated using the metal abundances, Galactic orbital parameters and space velocities of 66,220 main sequence stars selected from the high-sensitivity data from the GALAH DR3 and Gaia EDR3 sky survey programs.
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Key Findings & Data:The metallicity abundance gradients calculated in the $R_{\rm GC}$, $R_{\rm Rehber}$, $Z_{\rm max}$ planes according to the iron abundances of thin disk stars are $d[{\rm Fe/H}]/dR_{\rm GC}=-0.068\pm 0.014$, $d[{\rm Fe/H}]/dR_{\rm Rehber}=-0.074\pm 0.005$ ve $d[{\rm Fe/H}]/dZ_{\rm max}=-0.160\pm 0.008$ dex/kpc.
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Conclusion & Impact:As a result, the findings obtained in the study support the two-infall model.
🔬Design:Survey & Empirical Study
📍Scope:Comprehensive Sample
⚙️Variables:Galaxy: abundances · Galaxy: disc · solar neighbourhood

Abstract

In this study, metallicity abundance gradients for the thin disk population of the Milky Way were investigated using the metal abundances, Galactic orbital parameters and space velocities of 66,220 main sequence stars selected from the high-sensitivity data from the GALAH DR3 and Gaia EDR3 sky survey programs. The metallicity abundance gradients calculated in the $R_{\rm GC}$, $R_{\rm Rehber}$, $Z_{\rm max}$ planes according to the iron abundances of thin disk stars are $d[{\rm Fe/H}]/dR_{\rm GC}=-0.068\pm 0.014$, $d[{\rm Fe/H}]/dR_{\rm Rehber}=-0.074\pm 0.005$ ve $d[{\rm Fe/H}]/dZ_{\rm max}=-0.160\pm 0.008$ dex/kpc. Alpha element abundance gradients in the same planes were calculated as $d[\alpha/{\rm Fe}]/dR_{GC}=+0.001\pm 0.003$, $d[\alpha/{\rm Fe}]/dR_{Rehber}=-0.005\pm 0.001$ dex/kpc ve $d[\alpha/{\rm Fe}]/dZ_{\rm max}=0.034\pm 0.002$ dex/kpc. As a result, the findings obtained in the study support the two-infall model.

Özet

Bu çalışmada GALAH DR3 ve Gaia EDR3 gökyüzü tarama programlarından duyarlılığı yüksek veriler arasından seçilen 66,220 anakol yıldızının metal bollukları, Galaktik yörünge parametreleri ve uzay hızları kullanılarak Samanyolu'nun ince disk popülasyonu için metal bolluğu gradyentleri araştırılmıştır. İnce disk yıldızlarının demir bolluklarına göre $R_{\rm GC}$, $R_{\rm Rehber}$, $Z_{\rm max}$ düzlemlerinde hesaplanan metal bolluğu gradyentleri $d[{\rm Fe/H}]/dR_{\rm GC}=-0.068\pm 0.014$, $d[{\rm Fe/H}]/dR_{\rm Rehber}=-0.074\pm 0.005$ ve $d[{\rm Fe/H}]/dZ_{\rm max}=-0.160\pm 0.008$ dex/kpc'dir, alfa element bolluk gradyentleri de $d[\alpha/{\rm Fe}]/dR_{GC}=+0.001\pm 0.003$, $d[\alpha/{\rm Fe}]/dR_{Rehber}=-0.005\pm 0.001$ dex/kpc ve $d[\alpha/{\rm Fe}]/dZ_{\rm max}=0.034\pm 0.002$ dex/kpc’dir. Bulunan sonuçlar Samanyolu'nun içten dışa çökme senaryoları ile uyum içerisindedir.

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Cite This Article

AKBABA, F., AK, T., PLEVNE, O. (2022). Investigation of Metallicity Gradient with GALAH and Gaia Data in the Milky Way. Turkish Journal of Astronomy and Astrophysics, Cilt: 3 - Sayı: 3, 43–51. https://ajindex.com/articles/870940

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