On the fragmentation of filaments in a molecular cloud simulation
<i>Context.<i/> The fragmentation of filaments in molecular clouds has attracted a lot of attention recently as there seems to be a close relation between the evolution of filaments and star formation. The study of the fragmentation process has been motivated by simple analytical models....
Gespeichert in:
| Hauptverfasser: | , , , , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
01 March 2018
|
| In: |
Astronomy and astrophysics
Year: 2018, Jahrgang: 610 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/201731836 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1051/0004-6361/201731836 Verlag, lizenzpflichtig, Volltext: https://www.aanda.org/articles/aa/abs/2018/02/aa31836-17/aa31836-17.html 
|
| Verfasserangaben: | R.-A. Chira, J. Kainulainen, J.C. Ibáñez-Mejía, Th. Henning, and M.-M. Mac Low |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1741883164 | ||
| 003 | DE-627 | ||
| 005 | 20220819042616.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 201203s2018 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1051/0004-6361/201731836 |2 doi | |
| 035 | |a (DE-627)1741883164 | ||
| 035 | |a (DE-599)KXP1741883164 | ||
| 035 | |a (OCoLC)1341383074 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Chira, Roxana-Adela |d 1990- |e VerfasserIn |0 (DE-588)1059078333 |0 (DE-627)797935673 |0 (DE-576)414913140 |4 aut | |
| 245 | 1 | 0 | |a On the fragmentation of filaments in a molecular cloud simulation |c R.-A. Chira, J. Kainulainen, J.C. Ibáñez-Mejía, Th. Henning, and M.-M. Mac Low |
| 264 | 1 | |c 01 March 2018 | |
| 300 | |a 16 | ||
| 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 03.12.2020 | ||
| 520 | |a <i>Context.<i/> The fragmentation of filaments in molecular clouds has attracted a lot of attention recently as there seems to be a close relation between the evolution of filaments and star formation. The study of the fragmentation process has been motivated by simple analytical models. However, only a few comprehensive studies have analysed the evolution of filaments using numerical simulations where the filaments form self-consistently as part of large-scale molecular cloud evolution.<i>Aim.<i/> We address the early evolution of parsec-scale filaments that form within individual clouds. In particular, we focus on three questions: How do the line masses of filaments evolve? How and when do the filaments fragment? How does the fragmentation relate to the line masses of the filaments?<i>Methods.<i/> We examine three simulated molecular clouds formed in kiloparsec-scale numerical simulations performed with the FLASH adaptive mesh refinement magnetohydrodynamic code. The simulations model a self-gravitating, magnetised, stratified, supernova-driven interstellar medium, including photoelectric heating and radiative cooling. We follow the evolution of the clouds for 6 Myr from the time self-gravity starts to act. We identify filaments using the DisPerSe algorithm, and compare the results to other filament-finding algorithms. We determine the properties of the identified filaments and compare them with the predictions of analytic filament stability models.<i>Results.<i/> The average line masses of the identified filaments, as well as the fraction of mass in filamentary structures, increases fairly continuously after the onset of self-gravity. The filaments show fragmentation starting relatively early: the first fragments appear when the line masses lie well below the critical line mass of Ostriker’s isolated hydrostatic equilibrium solution (~16 <i>M<i/><sub>⊙<sub/> pc<sup>−1<sup/>), commonly used as a fragmentation criterion. The average line masses of filaments identified in three-dimensional volume density cubes increases far more quickly than those identified in two-dimensional column density maps.<i>Conclusions.<i/> Our results suggest that hydrostatic or dynamic compression from the surrounding cloud has a significant impact on the early dynamical evolution of filaments. A simple model of an isolated, isothermal cylinder may not provide a good approach for fragmentation analysis. Caution must be exercised in interpreting distributions of properties of filaments identified in column density maps, especially in the case of low-mass filaments. Comparing or combining results from studies that use different filament finding techniques is strongly discouraged. | ||
| 700 | 1 | |a Kainulainen, J. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Ibáñez-Mejía, J. C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Henning, Thomas |d 1956- |e VerfasserIn |0 (DE-588)124568637 |0 (DE-627)526967811 |0 (DE-576)294236120 |4 aut | |
| 700 | 1 | |a Mac Low, Mordecai-Mark |d 1963- |e VerfasserIn |0 (DE-588)1084236532 |0 (DE-627)848468848 |0 (DE-576)456249001 |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Astronomy and astrophysics |d Les Ulis : EDP Sciences, 1969 |g 610(2018) Artikel-Nummer A62, 16 Seiten |h Online-Ressource |w (DE-627)253390222 |w (DE-600)1458466-9 |w (DE-576)072283351 |x 1432-0746 |7 nnas |a On the fragmentation of filaments in a molecular cloud simulation |
| 773 | 1 | 8 | |g volume:610 |g year:2018 |g extent:16 |a On the fragmentation of filaments in a molecular cloud simulation |
| 856 | 4 | 0 | |u https://doi.org/10.1051/0004-6361/201731836 |x Verlag |x Resolving-System |z lizenzpflichtig |3 Volltext |
| 856 | 4 | 0 | |u https://www.aanda.org/articles/aa/abs/2018/02/aa31836-17/aa31836-17.html |x Verlag |z lizenzpflichtig |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20201203 | ||
| 993 | |a Article | ||
| 994 | |a 2018 | ||
| 998 | |g 1084236532 |a Mac Low, Mordecai-Mark |m 1084236532:Mac Low, Mordecai-Mark |p 5 |y j | ||
| 998 | |g 124568637 |a Henning, Thomas |m 124568637:Henning, Thomas |d 130000 |e 130000PH124568637 |k 0/130000/ |p 4 | ||
| 998 | |g 1059078333 |a Chira, Roxana-Adela |m 1059078333:Chira, Roxana-Adela |p 1 |x j | ||
| 999 | |a KXP-PPN1741883164 |e 3816554466 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"recId":"1741883164","language":["eng"],"type":{"media":"Online-Ressource","bibl":"article-journal"},"note":["Gesehen am 03.12.2020"],"title":[{"title_sort":"On the fragmentation of filaments in a molecular cloud simulation","title":"On the fragmentation of filaments in a molecular cloud simulation"}],"person":[{"family":"Chira","given":"Roxana-Adela","display":"Chira, Roxana-Adela","roleDisplay":"VerfasserIn","role":"aut"},{"given":"J.","family":"Kainulainen","role":"aut","roleDisplay":"VerfasserIn","display":"Kainulainen, J."},{"display":"Ibáñez-Mejía, J. C.","roleDisplay":"VerfasserIn","role":"aut","family":"Ibáñez-Mejía","given":"J. C."},{"roleDisplay":"VerfasserIn","display":"Henning, Thomas","role":"aut","family":"Henning","given":"Thomas"},{"roleDisplay":"VerfasserIn","display":"Mac Low, Mordecai-Mark","role":"aut","family":"Mac Low","given":"Mordecai-Mark"}],"relHost":[{"recId":"253390222","language":["eng"],"corporate":[{"roleDisplay":"Herausgebendes Organ","display":"European Southern Observatory","role":"isb"}],"disp":"On the fragmentation of filaments in a molecular cloud simulationAstronomy and astrophysics","note":["Gesehen am 21.06.2024","Erscheint 36mal jährlich in 12 Bänden zu je 3 Ausgaben","Fortsetzung der Druck-Ausgabe"],"type":{"bibl":"periodical","media":"Online-Ressource"},"titleAlt":[{"title":"Astronomy & astrophysics"},{"title":"a European journal"}],"part":{"text":"610(2018) Artikel-Nummer A62, 16 Seiten","volume":"610","extent":"16","year":"2018"},"pubHistory":["1.1969 -"],"title":[{"subtitle":"an international weekly journal","title":"Astronomy and astrophysics","title_sort":"Astronomy and astrophysics"}],"physDesc":[{"extent":"Online-Ressource"}],"name":{"displayForm":["European Southern Observatory (ESO)"]},"id":{"issn":["1432-0746"],"zdb":["1458466-9"],"eki":["253390222"]},"origin":[{"dateIssuedKey":"1969","publisher":"EDP Sciences ; Springer","dateIssuedDisp":"1969-","publisherPlace":"Les Ulis ; Berlin ; Heidelberg"}]}],"physDesc":[{"extent":"16 S."}],"id":{"doi":["10.1051/0004-6361/201731836"],"eki":["1741883164"]},"origin":[{"dateIssuedKey":"2018","dateIssuedDisp":"01 March 2018"}],"name":{"displayForm":["R.-A. Chira, J. Kainulainen, J.C. Ibáñez-Mejía, Th. Henning, and M.-M. Mac Low"]}} | ||
| SRT | |a CHIRAROXANONTHEFRAGM0120 | ||