Alignment of the magnetic field in star-forming regions and why it might be difficult to observe
Magnetic fields are an important component of the interstellar medium (ISM) and exhibit strongly varying field strengths and a non-trivial correlation with the gas density. Its dynamical impact varies between individual regions of the ISM and correlates with the orientation of the field with respect...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
31 July 2021
|
| In: |
Monthly notices of the Royal Astronomical Society
Year: 2021, Volume: 507, Issue: 4, Pages: 5641-5657 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/stab2157 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/mnras/stab2157
|
| Author Notes: | Philipp Girichidis |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1777522706 | ||
| 003 | DE-627 | ||
| 005 | 20220820074914.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 211116s2021 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1093/mnras/stab2157 |2 doi | |
| 035 | |a (DE-627)1777522706 | ||
| 035 | |a (DE-599)KXP1777522706 | ||
| 035 | |a (OCoLC)1341424025 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Girichidis, Philipp |e VerfasserIn |0 (DE-588)1024760723 |0 (DE-627)720522072 |0 (DE-576)306987503 |4 aut | |
| 245 | 1 | 0 | |a Alignment of the magnetic field in star-forming regions and why it might be difficult to observe |c Philipp Girichidis |
| 264 | 1 | |c 31 July 2021 | |
| 300 | |a 17 | ||
| 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 16.11.2021 | ||
| 520 | |a Magnetic fields are an important component of the interstellar medium (ISM) and exhibit strongly varying field strengths and a non-trivial correlation with the gas density. Its dynamical impact varies between individual regions of the ISM and correlates with the orientation of the field with respect to the gas structures. Using high-resolution magneto-hydrodynamical simulations of the ISM, we explore the connection between the orientation of the field and the dynamical state of the gas. We find that the onset of gravitational instability in molecular gas above a density of $\rho \sim 10^{-21}\, \mathrm{g\, cm}^{-3}$$(n\sim 400\, \mathrm{cm}^{-3})$ coincides with an alignment of the magnetic field lines and the gas flow. At this transition, the gradient of the density changes from mainly perpendicular to preferentially parallel to the field lines. A connection between the three-dimensional alignment and projected two-dimensional observables is non-trivial, because of a large dispersion of the magnetic field orientation along the line of sight. The turbulent correlation lengths can be small compared to the typical integration lengths. As a consequence, the small-scale signal of the orientation can sensitively depend on the line of sight or the dynamical state of the cloud can fluctuate stochastically or be completely averaged out. With higher spatial resolution more small-scale structures are resolved, which aggravates the link between magneto-hydrodynamical quantities and projected observables. | ||
| 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 507(2021), 4, Seite 5641-5657 |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:507 |g year:2021 |g number:4 |g pages:5641-5657 |g extent:17 |a Alignment of the magnetic field in star-forming regions and why it might be difficult to observe |
| 856 | 4 | 0 | |u https://doi.org/10.1093/mnras/stab2157 |x Verlag |x Resolving-System |z lizenzpflichtig |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20211116 | ||
| 993 | |a Article | ||
| 994 | |a 2021 | ||
| 998 | |g 1024760723 |a Girichidis, Philipp |m 1024760723:Girichidis, Philipp |d 700000 |d 714000 |d 714200 |e 700000PG1024760723 |e 714000PG1024760723 |e 714200PG1024760723 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714200/ |p 1 |x j |y j | ||
| 999 | |a KXP-PPN1777522706 |e 4002451712 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"id":{"doi":["10.1093/mnras/stab2157"],"eki":["1777522706"]},"origin":[{"dateIssuedKey":"2021","dateIssuedDisp":"31 July 2021"}],"name":{"displayForm":["Philipp Girichidis"]},"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.]","publisher":"Oxford Univ. Press ; Blackwell ; Wiley-Blackwell","dateIssuedKey":"1827","dateIssuedDisp":"1827-"}],"physDesc":[{"extent":"Online-Ressource"}],"title":[{"title":"Monthly notices of the Royal Astronomical Society","title_sort":"Monthly notices of the Royal Astronomical Society"}],"part":{"extent":"17","text":"507(2021), 4, Seite 5641-5657","volume":"507","pages":"5641-5657","issue":"4","year":"2021"},"pubHistory":["1.1827 -"],"corporate":[{"role":"aut","display":"Royal Astronomical Society","roleDisplay":"VerfasserIn"}],"language":["eng"],"recId":"314059164","note":["Gesehen am 15.01.2018"],"type":{"bibl":"periodical","media":"Online-Ressource"},"disp":"Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society"}],"physDesc":[{"extent":"17 S."}],"title":[{"title":"Alignment of the magnetic field in star-forming regions and why it might be difficult to observe","title_sort":"Alignment of the magnetic field in star-forming regions and why it might be difficult to observe"}],"person":[{"given":"Philipp","family":"Girichidis","role":"aut","roleDisplay":"VerfasserIn","display":"Girichidis, Philipp"}],"recId":"1777522706","language":["eng"],"type":{"media":"Online-Ressource","bibl":"article-journal"},"note":["Gesehen am 16.11.2021"]} | ||
| SRT | |a GIRICHIDISALIGNMENTO3120 | ||