Bimodality of [α Fe]-[Fe/H] distributions is a natural outcome of dissipative collapse and disc growth in Milky Way-type galaxies
By using chemo-dynamical simulations of the Milky Way-type galaxies formation, we find that the two α-sequences are formed in quite different physical environments. The high-α sequence is formed early from a burst of star formation in a turbulent, compact gaseous disc that forms a thick disc. The lo...
Gespeichert in:
| Hauptverfasser: | , , , , , , , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
15 January 2021
|
| In: |
Monthly notices of the Royal Astronomical Society
Year: 2021, Jahrgang: 501, Heft: 4, Pages: 5176-5196 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/staa3996 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/mnras/staa3996
|
| Verfasserangaben: | Sergey Khoperskov, Misha Haywood, Owain Snaith, Paola Di Matteo, Matthew Lehnert, Evgenii Vasiliev, Sergey Naroenkov and Peter Berczik |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1760251356 | ||
| 003 | DE-627 | ||
| 005 | 20220819225428.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 210610s2021 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1093/mnras/staa3996 |2 doi | |
| 035 | |a (DE-627)1760251356 | ||
| 035 | |a (DE-599)KXP1760251356 | ||
| 035 | |a (OCoLC)1341415440 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Khoperskov, Sergey |e VerfasserIn |0 (DE-588)1235188949 |0 (DE-627)1760250783 |4 aut | |
| 245 | 1 | 0 | |a Bimodality of [α Fe]-[Fe/H] distributions is a natural outcome of dissipative collapse and disc growth in Milky Way-type galaxies |c Sergey Khoperskov, Misha Haywood, Owain Snaith, Paola Di Matteo, Matthew Lehnert, Evgenii Vasiliev, Sergey Naroenkov and Peter Berczik |
| 246 | 3 | 3 | |a Bimodality of [alpha Fe]-[Fe/H] distributions is a natural outcome of dissipative collapse and disc growth in Milky Way-type galaxies |
| 264 | 1 | |c 15 January 2021 | |
| 300 | |a 21 | ||
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a Computermedien |b c |2 rdamedia | ||
| 338 | |a Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Gesehen am 10.06.2021 | ||
| 520 | |a By using chemo-dynamical simulations of the Milky Way-type galaxies formation, we find that the two α-sequences are formed in quite different physical environments. The high-α sequence is formed early from a burst of star formation in a turbulent, compact gaseous disc that forms a thick disc. The low-α stellar population is the result of quiescent star formation supported by the slow accretion of enriched gas on to a radially extended thin disc. Feedback-driven outflows during the formation of the thick disc are responsible for the enrichment of the surrounding gaseous halo, which subsequently feeds the disc on a longer time-scale. During the thin disc phase, chemical evolution reaches an equilibrium metallicity and abundance, where the stars pile-up. This equilibrium metallicity decreases towards the outer disc, generating the ridge line that forms the low-α sequence. We identify a second mechanism capable of creating a low-α sequence in one of our simulations. A rapid shutdown of the star formation due to feedback at the end of the thick disc phase, suppresses the chemical enrichment of the halo gas, which, once accreted on to the star-forming disc, dilutes the interstellar medium at the beginning of the thin disc formation. Therefore, the bimodality is independent of any particular merger history, suggesting that it could be much more widespread than has been claimed. We also find that radial migration has a negligible effect on the $\rm [\alpha / Fe]\!-\![Fe / H]$ distribution over time, suggesting that α-bimodality results purely from the presence of different star formation regimes over the galaxy’s formation. | ||
| 700 | 1 | |a Haywood, Misha |e VerfasserIn |4 aut | |
| 700 | 1 | |a Snaith, Owain |e VerfasserIn |4 aut | |
| 700 | 1 | |a Di Matteo, Paola |e VerfasserIn |4 aut | |
| 700 | 1 | |a Lehnert, Matthew |e VerfasserIn |4 aut | |
| 700 | 1 | |a Vasiliev, Evgenii |e VerfasserIn |4 aut | |
| 700 | 1 | |a Naroenkov, Sergey |e VerfasserIn |4 aut | |
| 700 | 1 | |a Berczik, Peter |d 1964- |e VerfasserIn |0 (DE-588)1020741473 |0 (DE-627)691330328 |0 (DE-576)361912587 |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |a Royal Astronomical Society |t Monthly notices of the Royal Astronomical Society |d Oxford : Oxford Univ. Press, 1827 |g 501(2021), 4 vom: März, Seite 5176-5196 |h Online-Ressource |w (DE-627)314059164 |w (DE-600)2016084-7 |w (DE-576)090955420 |x 1365-2966 |7 nnas |
| 773 | 1 | 8 | |g volume:501 |g year:2021 |g number:4 |g month:03 |g pages:5176-5196 |g extent:21 |a Bimodality of [α Fe]-[Fe/H] distributions is a natural outcome of dissipative collapse and disc growth in Milky Way-type galaxies |
| 856 | 4 | 0 | |u https://doi.org/10.1093/mnras/staa3996 |x Verlag |x Resolving-System |z lizenzpflichtig |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20210610 | ||
| 993 | |a Article | ||
| 994 | |a 2021 | ||
| 998 | |g 1020741473 |a Berczik, Peter |m 1020741473:Berczik, Peter |p 8 |y j | ||
| 999 | |a KXP-PPN1760251356 |e 3936708428 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"person":[{"family":"Khoperskov","given":"Sergey","roleDisplay":"VerfasserIn","display":"Khoperskov, Sergey","role":"aut"},{"given":"Misha","family":"Haywood","role":"aut","roleDisplay":"VerfasserIn","display":"Haywood, Misha"},{"roleDisplay":"VerfasserIn","display":"Snaith, Owain","role":"aut","family":"Snaith","given":"Owain"},{"family":"Di Matteo","given":"Paola","display":"Di Matteo, Paola","roleDisplay":"VerfasserIn","role":"aut"},{"given":"Matthew","family":"Lehnert","role":"aut","roleDisplay":"VerfasserIn","display":"Lehnert, Matthew"},{"family":"Vasiliev","given":"Evgenii","display":"Vasiliev, Evgenii","roleDisplay":"VerfasserIn","role":"aut"},{"role":"aut","display":"Naroenkov, Sergey","roleDisplay":"VerfasserIn","given":"Sergey","family":"Naroenkov"},{"family":"Berczik","given":"Peter","roleDisplay":"VerfasserIn","display":"Berczik, Peter","role":"aut"}],"title":[{"title":"Bimodality of [α Fe]-[Fe/H] distributions is a natural outcome of dissipative collapse and disc growth in Milky Way-type galaxies","title_sort":"Bimodality of [α Fe]-[Fe/H] distributions is a natural outcome of dissipative collapse and disc growth in Milky Way-type galaxies"}],"recId":"1760251356","language":["eng"],"note":["Gesehen am 10.06.2021"],"type":{"media":"Online-Ressource","bibl":"article-journal"},"titleAlt":[{"title":"Bimodality of [alpha Fe]-[Fe/H] distributions is a natural outcome of dissipative collapse and disc growth in Milky Way-type galaxies"}],"name":{"displayForm":["Sergey Khoperskov, Misha Haywood, Owain Snaith, Paola Di Matteo, Matthew Lehnert, Evgenii Vasiliev, Sergey Naroenkov and Peter Berczik"]},"id":{"eki":["1760251356"],"doi":["10.1093/mnras/staa3996"]},"origin":[{"dateIssuedKey":"2021","dateIssuedDisp":"15 January 2021"}],"relHost":[{"physDesc":[{"extent":"Online-Ressource"}],"id":{"issn":["1365-2966"],"zdb":["2016084-7"],"eki":["314059164"],"doi":["10.1111/(ISSN)1365-2966"]},"origin":[{"dateIssuedKey":"1827","publisher":"Oxford Univ. Press ; Blackwell ; Wiley-Blackwell","dateIssuedDisp":"1827-","publisherPlace":"Oxford ; Oxford [u.a.] ; Oxford [u.a.]"}],"part":{"volume":"501","text":"501(2021), 4 vom: März, Seite 5176-5196","extent":"21","year":"2021","issue":"4","pages":"5176-5196"},"pubHistory":["1.1827 -"],"recId":"314059164","language":["eng"],"corporate":[{"role":"aut","display":"Royal Astronomical Society","roleDisplay":"VerfasserIn"}],"disp":"Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society","note":["Gesehen am 15.01.2018"],"type":{"bibl":"periodical","media":"Online-Ressource"},"title":[{"title_sort":"Monthly notices of the Royal Astronomical Society","title":"Monthly notices of the Royal Astronomical Society"}]}],"physDesc":[{"extent":"21 S."}]} | ||
| SRT | |a KHOPERSKOVBIMODALITY1520 | ||