Moving-mesh simulations of star-forming cores in magneto-gravo-turbulence
Star formation in our Galaxy occurs in molecular clouds that are self-gravitating, highly turbulent, and magnetized. We study the conditions under which cloud cores inherit large-scale magnetic field morphologies and how the field is governed by cloud turbulence. We present four moving-mesh simulati...
Gespeichert in:
| Hauptverfasser: | , , , , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2017 March 20
|
| In: |
The astrophysical journal
Year: 2017, Jahrgang: 838, Heft: 1, Pages: 1-14 |
| ISSN: | 1538-4357 |
| DOI: | 10.3847/1538-4357/aa6475 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.3847/1538-4357/aa6475
|
| Verfasserangaben: | Philip Mocz, Blakesley Burkhart, Lars Hernquist, Christopher F. McKee, and Volker Springel |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1564700046 | ||
| 003 | DE-627 | ||
| 005 | 20230313183320.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 171024s2017 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.3847/1538-4357/aa6475 |2 doi | |
| 035 | |a (DE-627)1564700046 | ||
| 035 | |a (DE-576)494700041 | ||
| 035 | |a (DE-599)BSZ494700041 | ||
| 035 | |a (OCoLC)1340981042 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Mocz, Philip |e VerfasserIn |0 (DE-588)1283261367 |0 (DE-627)1839064862 |4 aut | |
| 245 | 1 | 0 | |a Moving-mesh simulations of star-forming cores in magneto-gravo-turbulence |c Philip Mocz, Blakesley Burkhart, Lars Hernquist, Christopher F. McKee, and Volker Springel |
| 264 | 1 | |c 2017 March 20 | |
| 300 | |a 14 | ||
| 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 24.10.2017 | ||
| 520 | |a Star formation in our Galaxy occurs in molecular clouds that are self-gravitating, highly turbulent, and magnetized. We study the conditions under which cloud cores inherit large-scale magnetic field morphologies and how the field is governed by cloud turbulence. We present four moving-mesh simulations of supersonic, turbulent, isothermal, self-gravitating gas with a range of magnetic mean-field strengths characterized by the Alfvénic Mach number ##IMG## [http://ej.iop.org/images/0004-637X/838/1/40/apjaa6475ieqn1.gif] $ \mathcal M _\rmA,0$ , resolving prestellar core formation from parsec to a few astronomical unit scales. In our simulations with the turbulent kinetic energy density dominating over magnetic pressure ( ##IMG## [http://ej.iop.org/images/0004-637X/838/1/40/apjaa6475ieqn2.gif] $ \mathcal M _\rmA,0\gt 1$ ), we find that the collapse is approximately isotropic with B ∝ ρ 2/3 , core properties are similar regardless of initial mean-field strength, and the field direction on 100 au scales is uncorrelated with the mean field. However, in the case of a dominant large-scale magnetic field ( ##IMG## [http://ej.iop.org/images/0004-637X/838/1/40/apjaa6475ieqn3.gif] $ \mathcal M _\rmA,0=0.35$ ), the collapse is anisotropic with B ∝ ρ 1/2 . This transition at ##IMG## [http://ej.iop.org/images/0004-637X/838/1/40/apjaa6475ieqn4.gif] $ \mathcal M _\rmA,0\sim 1$ is not expected to be sharp, but clearly signifies two different paths for magnetic field evolution in star formation. Based on observations of different star-forming regions, we conclude that star formation in the interstellar medium may occur in both regimes. Magnetic field correlation with the mean field extends to smaller scales as ##IMG## [http://ej.iop.org/images/0004-637X/838/1/40/apjaa6475ieqn5.gif] $ \mathcal M _\rmA,0$ decreases, making future Atacama Large Millimeter Array observations useful for constraining ##IMG## [http://ej.iop.org/images/0004-637X/838/1/40/apjaa6475ieqn6.gif] $ \mathcal M _\rmA,0$ of the interstellar medium. | ||
| 700 | 1 | |a Burkhart, Blakesley |e VerfasserIn |4 aut | |
| 700 | 1 | |a Hernquist, Lars |d 1954- |e VerfasserIn |0 (DE-588)1264244401 |0 (DE-627)1813088241 |4 aut | |
| 700 | 1 | |a McKee, Christopher F. |d 1942- |e VerfasserIn |0 (DE-588)1011807785 |0 (DE-627)704806576 |0 (DE-576)259010979 |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 The astrophysical journal |d London : Institute of Physics Publ., 1995 |g 838(2017), 1, Artikel-ID 40, Seite 1-14 |h Online-Ressource |w (DE-627)269019219 |w (DE-600)1473835-1 |w (DE-576)077662733 |x 1538-4357 |7 nnas |a Moving-mesh simulations of star-forming cores in magneto-gravo-turbulence |
| 773 | 1 | 8 | |g volume:838 |g year:2017 |g number:1 |g elocationid:40 |g pages:1-14 |g extent:14 |a Moving-mesh simulations of star-forming cores in magneto-gravo-turbulence |
| 856 | 4 | 0 | |u http://dx.doi.org/10.3847/1538-4357/aa6475 |x Verlag |x Resolving-System |z kostenfrei |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20171024 | ||
| 993 | |a Article | ||
| 994 | |a 2017 | ||
| 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 5 |y j | ||
| 999 | |a KXP-PPN1564700046 |e 2985913071 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"person":[{"given":"Philip","family":"Mocz","role":"aut","display":"Mocz, Philip","roleDisplay":"VerfasserIn"},{"given":"Blakesley","family":"Burkhart","role":"aut","display":"Burkhart, Blakesley","roleDisplay":"VerfasserIn"},{"given":"Lars","family":"Hernquist","role":"aut","display":"Hernquist, Lars","roleDisplay":"VerfasserIn"},{"given":"Christopher F.","family":"McKee","role":"aut","roleDisplay":"VerfasserIn","display":"McKee, Christopher F."},{"given":"Volker","family":"Springel","role":"aut","display":"Springel, Volker","roleDisplay":"VerfasserIn"}],"title":[{"title":"Moving-mesh simulations of star-forming cores in magneto-gravo-turbulence","title_sort":"Moving-mesh simulations of star-forming cores in magneto-gravo-turbulence"}],"note":["Gesehen am 24.10.2017"],"type":{"bibl":"article-journal","media":"Online-Ressource"},"recId":"1564700046","language":["eng"],"name":{"displayForm":["Philip Mocz, Blakesley Burkhart, Lars Hernquist, Christopher F. McKee, and Volker Springel"]},"origin":[{"dateIssuedKey":"2017","dateIssuedDisp":"2017 March 20"}],"id":{"doi":["10.3847/1538-4357/aa6475"],"eki":["1564700046"]},"physDesc":[{"extent":"14 S."}],"relHost":[{"physDesc":[{"extent":"Online-Ressource"}],"origin":[{"publisherPlace":"London ; Chicago, Ill. [u.a.]","dateIssuedDisp":"[1995?]-","publisher":"Institute of Physics Publ. ; Univ. of Chicago Press"}],"id":{"zdb":["1473835-1"],"eki":["269019219"],"issn":["1538-4357"]},"name":{"displayForm":["publ. in coll. with the American Astronomical Society. S. Chandrasekhar, managing ed"]},"pubHistory":["Vol. 447 (1995) [?]-"],"titleAlt":[{"title":"The astrophysical journal / 1"},{"title":"ApJ"}],"part":{"year":"2017","pages":"1-14","issue":"1","text":"838(2017), 1, Artikel-ID 40, Seite 1-14","volume":"838","extent":"14"},"type":{"bibl":"periodical","media":"Online-Ressource"},"disp":"Moving-mesh simulations of star-forming cores in magneto-gravo-turbulenceThe astrophysical journal","note":["Gesehen am 18.01.2022","Fortsetzung der Druck-Ausgabe"],"recId":"269019219","language":["eng"],"title":[{"title_sort":"astrophysical journal","title":"The astrophysical journal","subtitle":"an international review of spectroscopy and astronomical physics"}]}]} | ||
| SRT | |a MOCZPHILIPMOVINGMESH2017 | ||