Origin of chemically distinct discs in the Auriga cosmological simulations
The stellar disk of the Milky Way shows complex spatial and abundance structure that is central to understanding the key physical mechanisms responsible for shaping our Galaxy. In this study, we use six very high resolution cosmological zoom simulations of Milky Way-sized haloes to study the prevale...
Gespeichert in:
| Hauptverfasser: | , , , , , |
|---|---|
| Dokumenttyp: | Article (Journal) Kapitel/Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
2017
|
| In: |
Arxiv
|
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://arxiv.org/abs/1708.07834
|
| Verfasserangaben: | Robert J.J. Grand, Sebastián Bustamante, Facundo A. Gómez, Daisuke Kawata, Federico Marinacci, Rüdiger Pakmor, Hans-Walter Rix, Christine M. Simpson, Martin Sparre, Volker Springel |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1571178740 | ||
| 003 | DE-627 | ||
| 005 | 20230313181531.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 180319s2017 xx |||||o 00| ||eng c | ||
| 035 | |a (DE-627)1571178740 | ||
| 035 | |a (DE-576)501178740 | ||
| 035 | |a (DE-599)BSZ501178740 | ||
| 035 | |a (OCoLC)1340994387 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Grand, Robert J. J. |d 1987- |e VerfasserIn |0 (DE-588)1095688774 |0 (DE-627)856326674 |0 (DE-576)462843289 |4 aut | |
| 245 | 1 | 0 | |a Origin of chemically distinct discs in the Auriga cosmological simulations |c Robert J.J. Grand, Sebastián Bustamante, Facundo A. Gómez, Daisuke Kawata, Federico Marinacci, Rüdiger Pakmor, Hans-Walter Rix, Christine M. Simpson, Martin Sparre, Volker Springel |
| 264 | 1 | |c 2017 | |
| 300 | |a 12 | ||
| 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 15.02.2019 | ||
| 520 | |a The stellar disk of the Milky Way shows complex spatial and abundance structure that is central to understanding the key physical mechanisms responsible for shaping our Galaxy. In this study, we use six very high resolution cosmological zoom simulations of Milky Way-sized haloes to study the prevalence and formation of chemically distinct disc components. We find that our simulations develop a clearly bimodal distribution in the $[\rm \alpha/Fe]$ -- $[\rm Fe/H]$ plane. We find two main pathways to creating this dichotomy which operate in different regions of the galaxies: a) an early ($z>1$) and intense high-$\rm[\alpha/Fe]$ star formation phase in the inner region ($R\lesssim 5$ kpc) induced by gas-rich mergers, followed by more quiescent low-$\rm[\alpha/Fe]$ star formation; and b) an early phase of high-$\rm[\alpha/Fe]$ star formation in the outer disc followed by a shrinking of the gas disc owing to a temporarily lowered gas accretion rate, after which disc growth resumes. In process b), a double-peaked star formation history around the time and radius of disc shrinking accentuates the dichotomy. If the early star formation phase is prolonged (rather than short and intense), chemical evolution proceeds as per process a) in the inner region, but the dichotomy is less clear. In the outer region, the dichotomy is only evident if the first intense phase of star formation covers a large enough radial range before disc shrinking occurs; otherwise, the outer disc consists of only low-$\rm[\alpha/Fe]$ sequence stars. We discuss the implication that both processes occurred in the Milky Way. | ||
| 650 | 4 | |a Astrophysics - Cosmology and Nongalactic Astrophysics | |
| 650 | 4 | |a Astrophysics - Astrophysics of Galaxies | |
| 650 | 4 | |a Astrophysics - Solar and Stellar Astrophysics | |
| 700 | 1 | |a Bustamente, Sebastian |d 1990- |e VerfasserIn |0 (DE-588)116891602X |0 (DE-627)1032664126 |0 (DE-576)511838522 |4 aut | |
| 700 | 1 | |a Marinacci, Federico |e VerfasserIn |0 (DE-588)1054438684 |0 (DE-627)79152194X |0 (DE-576)410132837 |4 aut | |
| 700 | 1 | |a Pakmor, Rüdiger |d 1982- |e VerfasserIn |0 (DE-588)14360905X |0 (DE-627)647700670 |0 (DE-576)337951543 |4 aut | |
| 700 | 1 | |a Rix, Hans-Walter |d 1964- |e VerfasserIn |0 (DE-588)1041372485 |0 (DE-627)767088360 |0 (DE-576)393077462 |4 aut | |
| 700 | 1 | |a Springel, Volker |d 1970- |e VerfasserIn |0 (DE-588)122321391 |0 (DE-627)705861503 |0 (DE-576)293218463 |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Arxiv |d Ithaca, NY : Cornell University, 1991 |g (2017) Artikel-Nummer 1708.07834, 12 Seiten |h Online-Ressource |w (DE-627)509006531 |w (DE-600)2225896-6 |w (DE-576)28130436X |7 nnas |a Origin of chemically distinct discs in the Auriga cosmological simulations |
| 773 | 1 | 8 | |g year:2017 |g extent:12 |a Origin of chemically distinct discs in the Auriga cosmological simulations |
| 856 | 4 | 0 | |u http://arxiv.org/abs/1708.07834 |x Verlag |z kostenfrei |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20180319 | ||
| 993 | |a Article | ||
| 998 | |g 1041372485 |a Rix, Hans-Walter |m 1041372485:Rix, Hans-Walter |d 130000 |e 130000PR1041372485 |k 0/130000/ |p 7 | ||
| 998 | |g 122321391 |a Springel, Volker |m 122321391:Springel, Volker |d 700000 |d 714000 |d 714100 |e 700000PS122321391 |e 714000PS122321391 |e 714100PS122321391 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714100/ |p 10 |y j | ||
| 998 | |g 14360905X |a Pakmor, Rüdiger |m 14360905X:Pakmor, Rüdiger |d 700000 |d 714000 |e 700000PP14360905X |e 714000PP14360905X |k 0/700000/ |k 1/700000/714000/ |p 6 | ||
| 998 | |g 1095688774 |a Grand, Robert J. J. |m 1095688774:Grand, Robert J. J. |d 500000 |d 500881 |e 500000PG1095688774 |e 500881PG1095688774 |k 0/500000/ |k 1/500000/500881/ |p 1 |x j | ||
| 999 | |a KXP-PPN1571178740 |e 3003648950 | ||
| BIB | |a Y | ||
| JSO | |a {"person":[{"roleDisplay":"VerfasserIn","display":"Grand, Robert J. J.","role":"aut","family":"Grand","given":"Robert J. J."},{"role":"aut","display":"Bustamente, Sebastian","roleDisplay":"VerfasserIn","given":"Sebastian","family":"Bustamente"},{"family":"Marinacci","given":"Federico","roleDisplay":"VerfasserIn","display":"Marinacci, Federico","role":"aut"},{"display":"Pakmor, Rüdiger","roleDisplay":"VerfasserIn","role":"aut","family":"Pakmor","given":"Rüdiger"},{"roleDisplay":"VerfasserIn","display":"Rix, Hans-Walter","role":"aut","family":"Rix","given":"Hans-Walter"},{"display":"Springel, Volker","roleDisplay":"VerfasserIn","role":"aut","family":"Springel","given":"Volker"}],"title":[{"title_sort":"Origin of chemically distinct discs in the Auriga cosmological simulations","title":"Origin of chemically distinct discs in the Auriga cosmological simulations"}],"note":["Gesehen am 15.02.2019"],"type":{"media":"Online-Ressource","bibl":"chapter"},"language":["eng"],"recId":"1571178740","name":{"displayForm":["Robert J.J. Grand, Sebastián Bustamante, Facundo A. Gómez, Daisuke Kawata, Federico Marinacci, Rüdiger Pakmor, Hans-Walter Rix, Christine M. Simpson, Martin Sparre, Volker Springel"]},"origin":[{"dateIssuedDisp":"2017","dateIssuedKey":"2017"}],"id":{"eki":["1571178740"]},"physDesc":[{"extent":"12 S."}],"relHost":[{"title":[{"title_sort":"Arxiv","title":"Arxiv"}],"type":{"media":"Online-Ressource","bibl":"edited-book"},"disp":"Origin of chemically distinct discs in the Auriga cosmological simulationsArxiv","note":["Gesehen am 28.05.2024"],"recId":"509006531","language":["eng"],"pubHistory":["1991 -"],"titleAlt":[{"title":"Arxiv.org"},{"title":"Arxiv.org e-print archive"},{"title":"Arxiv e-print archive"},{"title":"De.arxiv.org"}],"part":{"text":"(2017) Artikel-Nummer 1708.07834, 12 Seiten","extent":"12","year":"2017"},"origin":[{"publisherPlace":"Ithaca, NY ; [Erscheinungsort nicht ermittelbar]","dateIssuedDisp":"1991-","dateIssuedKey":"1991","publisher":"Cornell University ; Arxiv.org"}],"id":{"zdb":["2225896-6"],"eki":["509006531"]},"physDesc":[{"extent":"Online-Ressource"}]}]} | ||
| SRT | |a GRANDROBERORIGINOFCH2017 | ||