Is the molecular KS relationship universal down to low metallicities?
In recent years, it has been speculated that in extreme low-metallicity galactic environments, stars form in regions that lack H2. In this paper, we investigate how changing the metallicity and ultraviolet (UV) field strength of a galaxy affects the star formation within, and the molecular gas Kenni...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
2022
|
| In: |
Monthly notices of the Royal Astronomical Society
Year: 2022, Volume: 510, Issue: 3, Pages: 4146-4165 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/stab3622 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/mnras/stab3622
|
| Author Notes: | David J. Whitworth, Rowan J. Smith, Robin Tress, Scott T. Kay, Simon C.O. Glover, Mattia C. Sormani and Ralf S. Klessen |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1797030000 | ||
| 003 | DE-627 | ||
| 005 | 20240416193240.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 220330s2022 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1093/mnras/stab3622 |2 doi | |
| 035 | |a (DE-627)1797030000 | ||
| 035 | |a (DE-599)KXP1797030000 | ||
| 035 | |a (OCoLC)1341458179 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Whitworth, David J. |e VerfasserIn |0 (DE-588)1254554025 |0 (DE-627)1797029355 |4 aut | |
| 245 | 1 | 0 | |a Is the molecular KS relationship universal down to low metallicities? |c David J. Whitworth, Rowan J. Smith, Robin Tress, Scott T. Kay, Simon C.O. Glover, Mattia C. Sormani and Ralf S. Klessen |
| 264 | 1 | |c 2022 | |
| 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 Published: 17 December 2021 | ||
| 500 | |a Gesehen am 30.03.2022 | ||
| 520 | |a In recent years, it has been speculated that in extreme low-metallicity galactic environments, stars form in regions that lack H2. In this paper, we investigate how changing the metallicity and ultraviolet (UV) field strength of a galaxy affects the star formation within, and the molecular gas Kennicutt-Schmidt (KS) relation. Using extremely high-resolution arepo simulations of isolated dwarf galaxies, we independently vary the metallicity and UV field to between 1 per cent and 10 per cent solar neighbourhood values. We include a non-equilibrium, time-dependent chemical network to model the molecular composition of the interstellar medium and include the effects of gas shielding from an ambient UV field. Crucially, our simulations directly model the gravitational collapse of gas into star-forming clumps and cores and their subsequent accretion using sink particles. In this first publication, we find that reducing the metallicity and UV field by a factor of 10 has no effect on star formation and minimal effect on the cold, dense star-forming gas. The cold gas depletion times are almost an order of magnitude longer than the molecular gas depletion time due to the presence of star formation in H i dominated cold gas. We study the H2 KS relationship that arises naturally within the simulations and find a near-linear power-law index of N = 1.09 ± 0.014 in our fiducial $10{{\ \rm per\ cent}}$ solar metallicity model. As the metallicity and UV field are reduced, this becomes moderately steeper, with a slope of N = 1.24 ± 0.022 for our $1{{\ \rm per\ cent}}$ solar metallicity and $1{{\ \rm per\ cent}}$ solar UV field model. | ||
| 700 | 1 | |a Smith, Rowan J. |d 1984- |e VerfasserIn |0 (DE-588)105834367X |0 (DE-627)796712972 |0 (DE-576)414348001 |4 aut | |
| 700 | 1 | |a Treß, Robin G. |d 1987- |e VerfasserIn |0 (DE-588)1137196254 |0 (DE-627)894165542 |0 (DE-576)491144814 |4 aut | |
| 700 | 1 | |a Kay, Scott T |e VerfasserIn |4 aut | |
| 700 | 1 | |a Glover, Simon |e VerfasserIn |0 (DE-588)1043520449 |0 (DE-627)770635903 |0 (DE-576)394879252 |4 aut | |
| 700 | 1 | |a Sormani, Mattia C. |d 1988- |e VerfasserIn |0 (DE-588)1137195827 |0 (DE-627)894164724 |0 (DE-576)491143990 |4 aut | |
| 700 | 1 | |a Klessen, Ralf S. |d 1968- |e VerfasserIn |0 (DE-588)120533820 |0 (DE-627)392381532 |0 (DE-576)178685399 |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 510(2022), 3, Seite 4146-4165 |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:510 |g year:2022 |g number:3 |g pages:4146-4165 |g extent:20 |a Is the molecular KS relationship universal down to low metallicities? |
| 856 | 4 | 0 | |u https://doi.org/10.1093/mnras/stab3622 |x Verlag |x Resolving-System |z lizenzpflichtig |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20220330 | ||
| 993 | |a Article | ||
| 994 | |a 2022 | ||
| 998 | |g 120533820 |a Klessen, Ralf S. |m 120533820:Klessen, Ralf S. |d 700000 |d 714000 |d 714200 |d 700000 |d 728500 |e 700000PK120533820 |e 714000PK120533820 |e 714200PK120533820 |e 700000PK120533820 |e 728500PK120533820 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714200/ |k 0/700000/ |k 1/700000/728500/ |p 7 |y j | ||
| 998 | |g 1137195827 |a Sormani, Mattia C. |m 1137195827:Sormani, Mattia C. |d 700000 |d 714000 |d 714200 |e 700000PS1137195827 |e 714000PS1137195827 |e 714200PS1137195827 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714200/ |p 6 | ||
| 998 | |g 1043520449 |a Glover, Simon |m 1043520449:Glover, Simon |d 700000 |d 714000 |d 714200 |d 700000 |d 728500 |e 700000PG1043520449 |e 714000PG1043520449 |e 714200PG1043520449 |e 700000PG1043520449 |e 728500PG1043520449 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714200/ |k 0/700000/ |k 1/700000/728500/ |p 5 | ||
| 998 | |g 1137196254 |a Treß, Robin G. |m 1137196254:Treß, Robin G. |d 500000 |d 500881 |d 700000 |d 714000 |d 714200 |e 500000PT1137196254 |e 500881PT1137196254 |e 700000PT1137196254 |e 714000PT1137196254 |e 714200PT1137196254 |k 0/500000/ |k 1/500000/500881/ |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714200/ |p 3 | ||
| 998 | |g 105834367X |a Smith, Rowan J. |m 105834367X:Smith, Rowan J. |p 2 | ||
| 999 | |a KXP-PPN1797030000 |e 4106929945 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"name":{"displayForm":["David J. Whitworth, Rowan J. Smith, Robin Tress, Scott T. Kay, Simon C.O. Glover, Mattia C. Sormani and Ralf S. Klessen"]},"language":["eng"],"person":[{"display":"Whitworth, David J.","given":"David J.","role":"aut","family":"Whitworth"},{"family":"Smith","role":"aut","given":"Rowan J.","display":"Smith, Rowan J."},{"given":"Robin G.","display":"Treß, Robin G.","family":"Treß","role":"aut"},{"display":"Kay, Scott T","given":"Scott T","family":"Kay","role":"aut"},{"display":"Glover, Simon","given":"Simon","family":"Glover","role":"aut"},{"given":"Mattia C.","display":"Sormani, Mattia C.","family":"Sormani","role":"aut"},{"role":"aut","family":"Klessen","given":"Ralf S.","display":"Klessen, Ralf S."}],"recId":"1797030000","note":["Published: 17 December 2021","Gesehen am 30.03.2022"],"title":[{"title_sort":"Is the molecular KS relationship universal down to low metallicities?","title":"Is the molecular KS relationship universal down to low metallicities?"}],"type":{"media":"Online-Ressource","bibl":"article-journal"},"id":{"doi":["10.1093/mnras/stab3622"],"eki":["1797030000"]},"physDesc":[{"extent":"20 S."}],"relHost":[{"corporate":[{"display":"Royal Astronomical Society","role":"aut"}],"disp":"Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society","type":{"bibl":"periodical","media":"Online-Ressource"},"part":{"issue":"3","extent":"20","pages":"4146-4165","text":"510(2022), 3, Seite 4146-4165","year":"2022","volume":"510"},"language":["eng"],"note":["Gesehen am 15.01.2018"],"pubHistory":["1.1827 -"],"physDesc":[{"extent":"Online-Ressource"}],"id":{"eki":["314059164"],"issn":["1365-2966"],"doi":["10.1111/(ISSN)1365-2966"],"zdb":["2016084-7"]},"title":[{"title":"Monthly notices of the Royal Astronomical Society","title_sort":"Monthly notices of the Royal Astronomical Society"}],"origin":[{"publisherPlace":"Oxford ; Oxford [u.a.] ; Oxford [u.a.]","dateIssuedKey":"1827","dateIssuedDisp":"1827-","publisher":"Oxford Univ. Press ; Blackwell ; Wiley-Blackwell"}],"recId":"314059164"}],"origin":[{"dateIssuedKey":"2022","dateIssuedDisp":"2022"}]} | ||
| SRT | |a WHITWORTHDISTHEMOLEC2022 | ||