The Cloud Factory I: Generating resolved filamentary molecular clouds from galactic-scale forces

The Cloud Factory I: Generating resolved filamentary molecular clouds from galactic-scale forces
复制标题

云工厂 I:利用银河尺度的力生成解析的丝状分子云

DOI:
10.1093/mnras/stz3328
复制
发表时间:
2020
影响因子:
4.8
通讯作者:
Smith R
Smith R
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Smith R

文献摘要

参考文献

被引文献

相似文献

我们引入了一套新的模拟“云工厂”,它以足够高的分辨率自洽地形成分子云复合体,以解析内部子结构(质量高达 0.25 M⊙),同时包括银河尺度的力。我们使用经过修改的 arepocode 版本,其中包括对冷分子 ISM 物理的详细处理,以及计算效率的分析银河引力势。模拟具有嵌套的分辨率级别,最低层与注入单个云复合体的示踪粒子相关。这些示踪剂细化区域嵌入到更大的模拟中,因此会继续受到来自云外部的力量。这使得模拟可以充当测试银河环境对恒星形成影响的实验室。在这里我们介绍我们的方法并研究银河环境对丝状云的影响。我们发现,与静止云(例如苍蝇丝)或由银河势主导的云(例如尼斯湖水怪)相比,在聚集性反馈爆发后形成的云复合体具有较短的长度,并且不太可能破碎。螺旋臂和差动旋转优先排列细丝,但强烈的反馈使它们随机化。云复合体内形成的长丝必然与低内部速度梯度相一致,这对丝状星团的形成具有影响。在超新星反馈主导区域形成的云复合体具有较少的恒星形成核心,而且分布更广泛。这些差异表明银河尺度的力可以对分子云内恒星的形成产生重大影响。
We introduce a new suite of simulations, ‘The Cloud Factory’, which self-consistently forms molecular cloud complexes at high enough resolution to resolve internal substructure (up to 0.25 M⊙in mass) all while including galactic-scale forces. We use a version of thearepocode modified to include a detailed treatment of the physics of the cold molecular ISM, and an analytical galactic gravitational potential for computational efficiency. The simulations have nested levels of resolution, with the lowest layer tied to tracer particles injected into individual cloud complexes. These tracer refinement regions are embedded in the larger simulation so continue to experience forces from outside the cloud. This allows the simulations to act as a laboratory for testing the effect of galactic environment on star formation. Here we introduce our method and investigate the effect of galactic environment on filamentary clouds. We find that cloud complexes formed after a clustered burst of feedback have shorter lengths and are less likely to fragment compared to quiescent clouds (e.g. the Musca filament) or those dominated by the galactic potential (e.g. Nessie). Spiral arms and differential rotation preferentially align filaments, but strong feedback randomizes them. Long filaments formed within the cloud complexes are necessarily coherent with low internal velocity gradients, which has implications for the formation of filamentary star-clusters. Cloud complexes formed in regions dominated by supernova feedback have fewer star-forming cores, and these are more widely distributed. These differences show galactic-scale forces can have a significant impact on star formation within molecular clouds.
DOI: 10.1093/mnras/stz1119
发表时间: 2018-09
影响因子: 4.8
作者:
P. Clark;S. Glover;S. Ragan;A. Duarte-Cabral
通讯作者: P. Clark;S. Glover;S. Ragan;A. Duarte-Cabral
DOI: 10.1051/0004-6361/201834049
发表时间: 2018-03
期刊: The Astrophysical Journal Supplement Series
影响因子: --
作者:
Shuo Kong;H. Arce;J. Feddersen;J. Carpenter;F. Nakamura;Y. Shimajiri;A. Isella;V. Ossenkopf-Okada;A. Sargent;Á. Sánchez-Monge;S. Suri;J. Kauffmann;T. Pillai;J. Pineda;J. Koda;J. Bally;D. Lis;P. Padoan;R. Klessen;S. Mairs;A. Goodman;P. Goldsmith;P. McGehee;P. Schilke;P. Teuben;M. Maureira;C. Hara;A. Ginsburg;B. Burkhart;Rowan J. Smith;A. Schmiedeke;J. Pineda;S. Ishii;K. Sasaki;R. Kawabe;Yumiko Urasawa;S. Oyamada;Yoshihiro Tanabe
通讯作者: Shuo Kong;H. Arce;J. Feddersen;J. Carpenter;F. Nakamura;Y. Shimajiri;A. Isella;V. Ossenkopf-Okada;A. Sargent;Á. Sánchez-Monge;S. Suri;J. Kauffmann;T. Pillai;J. Pineda;J. Koda;J. Bally;D. Lis;P. Padoan;R. Klessen;S. Mairs;A. Goodman;P. Goldsmith;P. McGehee;P. Schilke;P. Teuben;M. Maureira;C. Hara;A. Ginsburg;B. Burkhart;Rowan J. Smith;A. Schmiedeke;J. Pineda;S. Ishii;K. Sasaki;R. Kawabe;Yumiko Urasawa;S. Oyamada;Yoshihiro Tanabe
kpc 尺寸尺度上的星际介质和恒星形成
DOI: 10.1093/mnras/stu2585
发表时间: 2014
影响因子: 4.8
作者:
C. Dobbs
通讯作者: C. Dobbs
DOI: 10.3847/1538-4357/ab517d
发表时间: 2019-10
期刊: The Astrophysical Journal
影响因子: --
作者:
C. Zucker;Rowan J. Smith;A. Goodman
通讯作者: C. Zucker;Rowan J. Smith;A. Goodman
通过附近螺旋星系、星暴合并和高红移星系的流体动力学模拟来模拟二氧化碳排放
DOI: --
发表时间: 2014
期刊: Astronomy & Astrophysics
影响因子: --
作者:
F. Bournaud;E. Daddi;A. Weiss;F. Renaud;C. Mastropietro;R. Teyssier
通讯作者: R. Teyssier