The stellar mass assembly of galaxies in the Illustris simulation: growth by mergers and the spatial distribution of accreted stars
We use the Illustris simulation to study the relative contributions of in situ star formation and stellar accretion to the build-up of galaxies over an unprecedentedly wide range of masses (M* = 109-1012 M⊙), galaxy types, environments, and assembly histories. We find that the ‘two-phase’ picture of...
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
26 February 2016
|
| In: |
Monthly notices of the Royal Astronomical Society
Year: 2016, Jahrgang: 458, Heft: 3, Pages: 2371-2390 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/stw456 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1093/mnras/stw456
|
| Verfasserangaben: | Vicente Rodriguez-Gomez, Annalisa Pillepich, Laura V. Sales, Shy Genel, Mark Vogelsberger, Qirong Zhu, Sarah Wellons, Dylan Nelson, Paul Torrey, Volker Springel, Chung-Pei Ma and Lars Hernquist |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1565067967 | ||
| 003 | DE-627 | ||
| 005 | 20240316100258.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 171107s2016 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1093/mnras/stw456 |2 doi | |
| 035 | |a (DE-627)1565067967 | ||
| 035 | |a (DE-576)495067962 | ||
| 035 | |a (DE-599)BSZ495067962 | ||
| 035 | |a (OCoLC)1340981653 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Rodriguez-Gomez, Vicente |e VerfasserIn |0 (DE-588)1213043441 |0 (DE-627)1703274164 |0 (DE-576)426836782 |4 aut | |
| 245 | 1 | 4 | |a The stellar mass assembly of galaxies in the Illustris simulation |b growth by mergers and the spatial distribution of accreted stars |c Vicente Rodriguez-Gomez, Annalisa Pillepich, Laura V. Sales, Shy Genel, Mark Vogelsberger, Qirong Zhu, Sarah Wellons, Dylan Nelson, Paul Torrey, Volker Springel, Chung-Pei Ma and Lars Hernquist |
| 264 | 1 | |c 26 February 2016 | |
| 300 | |a 20 | ||
| 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 07.11.2017 | ||
| 520 | |a We use the Illustris simulation to study the relative contributions of in situ star formation and stellar accretion to the build-up of galaxies over an unprecedentedly wide range of masses (M* = 109-1012 M⊙), galaxy types, environments, and assembly histories. We find that the ‘two-phase’ picture of galaxy formation predicted by some models is a good approximation only for the most massive galaxies in our simulation - namely, the stellar mass growth of galaxies below a few times 1011 M⊙ is dominated by in situ star formation at all redshifts. The fraction of the total stellar mass of galaxies at z = 0 contributed by accreted stars shows a strong dependence on galaxy stellar mass, ranging from about 10 per cent for Milky Way-sized galaxies to over 80 per cent for M* ≈ 1012 M⊙ objects, yet with a large galaxy-to-galaxy variation. At a fixed stellar mass, elliptical galaxies and those formed at the centres of younger haloes exhibit larger fractions of ex situ stars than disc-like galaxies and those formed in older haloes. On average, ∼50 per cent of the ex situ stellar mass comes from major mergers (stellar mass ratio μ > 1/4), ∼20 per cent from minor mergers (1/10 < μ < 1/4), ∼20 per cent from very minor mergers (μ < 1/10), and ∼10 per cent from stars that were stripped from surviving galaxies (e.g. flybys or ongoing mergers). These components are spatially segregated, with in situ stars dominating the innermost regions of galaxies, and ex situ stars being deposited at larger galactocentric distances in order of decreasing merger mass ratio. | ||
| 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 |a Royal Astronomical Society |t Monthly notices of the Royal Astronomical Society |d Oxford : Oxford Univ. Press, 1827 |g 458(2016), 3, Seite 2371-2390 |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:458 |g year:2016 |g number:3 |g pages:2371-2390 |g extent:20 |a The stellar mass assembly of galaxies in the Illustris simulation growth by mergers and the spatial distribution of accreted stars |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1093/mnras/stw456 |x Verlag |x Resolving-System |z kostenfrei |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20171107 | ||
| 993 | |a Article | ||
| 994 | |a 2016 | ||
| 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 | ||
| 999 | |a KXP-PPN1565067967 |e 2986665489 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"physDesc":[{"extent":"20 S."}],"relHost":[{"id":{"zdb":["2016084-7"],"eki":["314059164"],"doi":["10.1111/(ISSN)1365-2966"],"issn":["1365-2966"]},"origin":[{"publisherPlace":"Oxford ; Oxford [u.a.] ; Oxford [u.a.]","dateIssuedKey":"1827","publisher":"Oxford Univ. Press ; Blackwell ; Wiley-Blackwell","dateIssuedDisp":"1827-"}],"physDesc":[{"extent":"Online-Ressource"}],"title":[{"title_sort":"Monthly notices of the Royal Astronomical Society","title":"Monthly notices of the Royal Astronomical Society"}],"recId":"314059164","language":["eng"],"corporate":[{"role":"aut","display":"Royal Astronomical Society","roleDisplay":"VerfasserIn"}],"disp":"Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society","type":{"media":"Online-Ressource","bibl":"periodical"},"note":["Gesehen am 15.01.2018"],"part":{"year":"2016","pages":"2371-2390","issue":"3","volume":"458","text":"458(2016), 3, Seite 2371-2390","extent":"20"},"pubHistory":["1.1827 -"]}],"origin":[{"dateIssuedKey":"2016","dateIssuedDisp":"26 February 2016"}],"id":{"eki":["1565067967"],"doi":["10.1093/mnras/stw456"]},"name":{"displayForm":["Vicente Rodriguez-Gomez, Annalisa Pillepich, Laura V. Sales, Shy Genel, Mark Vogelsberger, Qirong Zhu, Sarah Wellons, Dylan Nelson, Paul Torrey, Volker Springel, Chung-Pei Ma and Lars Hernquist"]},"note":["Gesehen am 07.11.2017"],"type":{"media":"Online-Ressource","bibl":"article-journal"},"language":["eng"],"recId":"1565067967","title":[{"title":"The stellar mass assembly of galaxies in the Illustris simulation","subtitle":"growth by mergers and the spatial distribution of accreted stars","title_sort":"stellar mass assembly of galaxies in the Illustris simulation"}],"person":[{"family":"Rodriguez-Gomez","given":"Vicente","roleDisplay":"VerfasserIn","display":"Rodriguez-Gomez, Vicente","role":"aut"},{"family":"Springel","given":"Volker","roleDisplay":"VerfasserIn","display":"Springel, Volker","role":"aut"}]} | ||
| SRT | |a RODRIGUEZGSTELLARMAS2620 | ||