Energy budget of forming clumps in numerical simulations of collapsing clouds
We analyze the physical properties and energy balance of density enhancements in two SPH simulations of the formation, evolution, and collapse of giant molecular clouds. In the simulations, no feedback is included, so all motions are due either to the initial decaying turbulence or to gravitational...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
December 12, 2016
|
| In: |
The astrophysical journal
Year: 2016, Volume: 833, Issue: 1 |
| ISSN: | 1538-4357 |
| DOI: | 10.3847/1538-4357/833/1/113 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3847/1538-4357/833/1/113
|
| Author Notes: | Vianey Camacho, Enrique Vázquez-Semadeni, Javier Ballesteros-Paredes, Gilberto C. Gómez, S. Michael Fall, and M. Dolores Mata-Chávez |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1696575370 | ||
| 003 | DE-627 | ||
| 005 | 20220818055415.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 200428s2016 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.3847/1538-4357/833/1/113 |2 doi | |
| 035 | |a (DE-627)1696575370 | ||
| 035 | |a (DE-599)KXP1696575370 | ||
| 035 | |a (OCoLC)1341317140 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Camacho, Vianey |e VerfasserIn |0 (DE-588)1208235605 |0 (DE-627)1694464857 |4 aut | |
| 245 | 1 | 0 | |a Energy budget of forming clumps in numerical simulations of collapsing clouds |c Vianey Camacho, Enrique Vázquez-Semadeni, Javier Ballesteros-Paredes, Gilberto C. Gómez, S. Michael Fall, and M. Dolores Mata-Chávez |
| 264 | 1 | |c December 12, 2016 | |
| 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 28.04.2020 | ||
| 520 | |a We analyze the physical properties and energy balance of density enhancements in two SPH simulations of the formation, evolution, and collapse of giant molecular clouds. In the simulations, no feedback is included, so all motions are due either to the initial decaying turbulence or to gravitational contraction. We define clumps as connected regions above a series of density thresholds. The resulting full set of clumps follows the generalized energy equipartition relation, , where is the velocity dispersion, R is the “radius,” and Σ is the column density. We interpret this as a natural consequence of gravitational contraction at all scales rather than virial equilibrium. Nevertheless, clumps with low Σ tend to show a large scatter around equipartition. In more than half of the cases, this scatter is dominated by external turbulent compressions that assemble the clumps rather than by small-scale random motions that would disperse them. The other half does actually disperse. Moreover, clump sub-samples selected by means of different criteria exhibit different scalings. Sub-samples with narrow Σ ranges follow Larson-like relations, although characterized by their respective values of Σ. Finally, we find that (i) clumps lying in filaments tend to appear sub-virial, (ii) high-density cores ( cm3) that exhibit moderate kinetic energy excesses often contain sink (“stellar”) particles and the excess disappears when the stellar mass is taken into account in the energy balance, and (iii) cores with kinetic energy excess but no stellar particles are truly in a state of dispersal. | ||
| 700 | 1 | |a Vázquez-Semadeni, Enrique |e VerfasserIn |4 aut | |
| 700 | 1 | |a Ballesteros-Paredes, Javier |e VerfasserIn |0 (DE-588)1165182114 |0 (DE-627)1029342660 |0 (DE-576)414343921 |4 aut | |
| 700 | 1 | |a Gómez, Gilberto C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Fall, S. Michael |e VerfasserIn |4 aut | |
| 700 | 1 | |a Mata-Chávez, M. Dolores |e VerfasserIn |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t The astrophysical journal |d London : Institute of Physics Publ., 1995 |g 833(2016,1) Artikel-Nummer 113, 17 Seiten |h Online-Ressource |w (DE-627)269019219 |w (DE-600)1473835-1 |w (DE-576)077662733 |x 1538-4357 |7 nnas |a Energy budget of forming clumps in numerical simulations of collapsing clouds |
| 773 | 1 | 8 | |g volume:833 |g year:2016 |g number:1 |a Energy budget of forming clumps in numerical simulations of collapsing clouds |
| 856 | 4 | 0 | |u https://doi.org/10.3847/1538-4357/833/1/113 |x Verlag |x Resolving-System |z lizenzpflichtig |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20200428 | ||
| 993 | |a Article | ||
| 994 | |a 2016 | ||
| 998 | |g 1165182114 |a Ballesteros-Paredes, Javier |m 1165182114:Ballesteros-Paredes, Javier |d 700000 |d 714000 |e 700000PB1165182114 |e 714000PB1165182114 |k 0/700000/ |k 1/700000/714000/ |p 3 | ||
| 999 | |a KXP-PPN1696575370 |e 3639793366 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"title":[{"title_sort":"Energy budget of forming clumps in numerical simulations of collapsing clouds","title":"Energy budget of forming clumps in numerical simulations of collapsing clouds"}],"origin":[{"dateIssuedKey":"2016","dateIssuedDisp":"December 12, 2016"}],"id":{"eki":["1696575370"],"doi":["10.3847/1538-4357/833/1/113"]},"name":{"displayForm":["Vianey Camacho, Enrique Vázquez-Semadeni, Javier Ballesteros-Paredes, Gilberto C. Gómez, S. Michael Fall, and M. Dolores Mata-Chávez"]},"person":[{"family":"Camacho","given":"Vianey","display":"Camacho, Vianey","roleDisplay":"VerfasserIn","role":"aut"},{"role":"aut","display":"Vázquez-Semadeni, Enrique","roleDisplay":"VerfasserIn","given":"Enrique","family":"Vázquez-Semadeni"},{"role":"aut","display":"Ballesteros-Paredes, Javier","roleDisplay":"VerfasserIn","given":"Javier","family":"Ballesteros-Paredes"},{"given":"Gilberto C.","family":"Gómez","role":"aut","display":"Gómez, Gilberto C.","roleDisplay":"VerfasserIn"},{"family":"Fall","given":"S. Michael","roleDisplay":"VerfasserIn","display":"Fall, S. Michael","role":"aut"},{"role":"aut","roleDisplay":"VerfasserIn","display":"Mata-Chávez, M. Dolores","given":"M. Dolores","family":"Mata-Chávez"}],"type":{"bibl":"article-journal","media":"Online-Ressource"},"note":["Gesehen am 28.04.2020"],"recId":"1696575370","language":["eng"],"relHost":[{"physDesc":[{"extent":"Online-Ressource"}],"name":{"displayForm":["publ. in coll. with the American Astronomical Society. S. Chandrasekhar, managing ed"]},"id":{"eki":["269019219"],"zdb":["1473835-1"],"issn":["1538-4357"]},"origin":[{"publisher":"Institute of Physics Publ. ; Univ. of Chicago Press","dateIssuedDisp":"[1995?]-","publisherPlace":"London ; Chicago, Ill. [u.a.]"}],"language":["eng"],"recId":"269019219","type":{"bibl":"periodical","media":"Online-Ressource"},"disp":"Energy budget of forming clumps in numerical simulations of collapsing cloudsThe astrophysical journal","note":["Gesehen am 18.01.2022","Fortsetzung der Druck-Ausgabe"],"part":{"text":"833(2016,1) Artikel-Nummer 113, 17 Seiten","volume":"833","issue":"1","year":"2016"},"titleAlt":[{"title":"The astrophysical journal / 1"},{"title":"ApJ"}],"pubHistory":["Vol. 447 (1995) [?]-"],"title":[{"title_sort":"astrophysical journal","subtitle":"an international review of spectroscopy and astronomical physics","title":"The astrophysical journal"}]}]} | ||
| SRT | |a CAMACHOVIAENERGYBUDG1220 | ||