Density profile of a self-gravitating polytropic turbulent fluid in the context of ensembles of molecular clouds
We obtain an equation for the density profile in a self-gravitating polytropic spherically symmetric turbulent fluid with an equation of state $p_{\rm gas}\propto \rho ^\Gamma$. This is done in the framework of ensembles of molecular clouds represented by single abstract objects as introduced by Don...
Gespeichert in:
| Hauptverfasser: | , , , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
1 June 2021
|
| In: |
Monthly notices of the Royal Astronomical Society
Year: 2021, Jahrgang: 505, Heft: 3, Pages: 3655-3663 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/stab1572 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/mnras/stab1572
|
| Verfasserangaben: | S. Donkov, I.Zh. Stefanov, T.V. Veltchev and R.S. Klessen |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1772257974 | ||
| 003 | DE-627 | ||
| 005 | 20240414193410.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 211004s2021 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1093/mnras/stab1572 |2 doi | |
| 035 | |a (DE-627)1772257974 | ||
| 035 | |a (DE-599)KXP1772257974 | ||
| 035 | |a (OCoLC)1341421620 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Donkov, Sava |e VerfasserIn |0 (DE-588)1163812137 |0 (DE-627)1028140290 |0 (DE-576)508222265 |4 aut | |
| 245 | 1 | 0 | |a Density profile of a self-gravitating polytropic turbulent fluid in the context of ensembles of molecular clouds |c S. Donkov, I.Zh. Stefanov, T.V. Veltchev and R.S. Klessen |
| 264 | 1 | |c 1 June 2021 | |
| 300 | |a 9 | ||
| 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 04.10.2021 | ||
| 520 | |a We obtain an equation for the density profile in a self-gravitating polytropic spherically symmetric turbulent fluid with an equation of state $p_{\rm gas}\propto \rho ^\Gamma$. This is done in the framework of ensembles of molecular clouds represented by single abstract objects as introduced by Donkov et al. The adopted physical picture is appropriate to describe the conditions near to the cloud core where the equation of state changes from isothermal (in the outer cloud layers) with Γ = 1 to one of ‘hard polytrope’ with exponent Γ > 1. On the assumption of steady state, as the accreting matter passes through all spatial scales, we show that the total energy per unit mass is an invariant with respect to the fluid flow. The obtained equation reproduces the Bernoulli equation for the proposed model and describes the balance of the kinetic, thermal, and gravitational energy of a fluid element. We propose as well a method to obtain approximate solutions in a power-law form which results in four solutions corresponding to different density profiles, polytropic exponents, and energy balance equations for a fluid element. One of them, a density profile with slope −3 and polytropic exponent Γ = 4/3, matches with observations and numerical works and, in particular, leads to a second power-law tail of the density distribution function in dense, self-gravitating cloud regions. | ||
| 700 | 1 | |a Stefanov, I Zh |e VerfasserIn |4 aut | |
| 700 | 1 | |a Veltchev, Todor V. |e VerfasserIn |0 (DE-588)116381296X |0 (DE-627)1028140541 |0 (DE-576)414550188 |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 505(2021), 3 vom: Aug., Seite 3655-3663 |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:505 |g year:2021 |g number:3 |g month:08 |g pages:3655-3663 |g extent:9 |a Density profile of a self-gravitating polytropic turbulent fluid in the context of ensembles of molecular clouds |
| 856 | 4 | 0 | |u https://doi.org/10.1093/mnras/stab1572 |x Verlag |x Resolving-System |z lizenzpflichtig |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20211004 | ||
| 993 | |a Article | ||
| 994 | |a 2021 | ||
| 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 4 |y j | ||
| 999 | |a KXP-PPN1772257974 |e 3983379451 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"title":[{"title":"Density profile of a self-gravitating polytropic turbulent fluid in the context of ensembles of molecular clouds","title_sort":"Density profile of a self-gravitating polytropic turbulent fluid in the context of ensembles of molecular clouds"}],"type":{"bibl":"article-journal","media":"Online-Ressource"},"physDesc":[{"extent":"9 S."}],"id":{"doi":["10.1093/mnras/stab1572"],"eki":["1772257974"]},"relHost":[{"origin":[{"dateIssuedDisp":"1827-","publisher":"Oxford Univ. Press ; Blackwell ; Wiley-Blackwell","publisherPlace":"Oxford ; Oxford [u.a.] ; Oxford [u.a.]","dateIssuedKey":"1827"}],"title":[{"title":"Monthly notices of the Royal Astronomical Society","title_sort":"Monthly notices of the Royal Astronomical Society"}],"id":{"zdb":["2016084-7"],"doi":["10.1111/(ISSN)1365-2966"],"issn":["1365-2966"],"eki":["314059164"]},"physDesc":[{"extent":"Online-Ressource"}],"recId":"314059164","corporate":[{"role":"aut","display":"Royal Astronomical Society"}],"disp":"Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society","type":{"bibl":"periodical","media":"Online-Ressource"},"note":["Gesehen am 15.01.2018"],"pubHistory":["1.1827 -"],"language":["eng"],"part":{"volume":"505","year":"2021","issue":"3","pages":"3655-3663","extent":"9","text":"505(2021), 3 vom: Aug., Seite 3655-3663"}}],"origin":[{"dateIssuedDisp":"1 June 2021","dateIssuedKey":"2021"}],"name":{"displayForm":["S. Donkov, I.Zh. Stefanov, T.V. Veltchev and R.S. Klessen"]},"language":["eng"],"person":[{"display":"Donkov, Sava","given":"Sava","role":"aut","family":"Donkov"},{"family":"Stefanov","role":"aut","display":"Stefanov, I Zh","given":"I Zh"},{"family":"Veltchev","role":"aut","given":"Todor V.","display":"Veltchev, Todor V."},{"given":"Ralf S.","display":"Klessen, Ralf S.","role":"aut","family":"Klessen"}],"recId":"1772257974","note":["Gesehen am 04.10.2021"]} | ||
| SRT | |a DONKOVSAVADENSITYPRO1202 | ||