Cloud-scale Radio Surveys of Star Formation and Feedback in Triangulum Galaxy M 33: VLA Observations
F. S. Tabatabaei, W. Cotton, E. Schinnerer, R. Beck, A. Brunthaler, K. M. Menten, J. Braine, E. Corbelli, C. Kramer, J. E. Beckman, J. H. Knapen, R. Paladino, E… 展开作者
F. S. Tabatabaei, W. Cotton, E. Schinnerer, R. Beck, A. Brunthaler, K. M. Menten, J. Braine, E. Corbelli, C. Kramer, J. E. Beckman, J. H. Knapen, R. Paladino, E. Koch, A. Camps Farina
备注:
20 pages, 12 figures, accepted for publication in MNRAS journal
研究大质量恒星形成和星际介质(ISM)之间的相互作用对于理解星系的演化至关重要。射电连续谱(RC)辐射是大质量恒星形成和星际介质高能成分的一种无干扰示踪剂。本文介绍了用Karl G. Jansky甚大阵列(VLA)我们校准的恒星形成率表面密度和调查的影响,漫反射辐射对这种校准使用的结构分解。分离热辐射和非热辐射成分,研究了星际介质不同相态之间的相关性以及大质量恒星形成的影响。在M33的18'× 18'(或4kpc × 4kpc)圆盘中,小于200 pc的射电源约占1.5GHz(6.3GHz)总RC辐射的36%(46%)。随着恒星形成率表面密度的增加,非热谱指数变得平坦,表明宇宙射线电子{从其出生地}逸出。磁场强度也随着恒星形成率的增加而增加,遵循双峰关系,表明小尺度湍流发电机在更高的光度和恒星形成率下更有效地起作用。虽然在恒星形成区的相关性更紧密,但非热辐射也与ISM中更静止的分子气体相关。当排除弥散结构时,M33存在几乎线性的分子星形成规律。大质量恒星的形成放大了磁场,增加了高能宇宙射线电子的数量,这有助于风和外流的开始。
英文摘要:
Studying the interplay between massive star formation and the interstellar medium (ISM) is paramount to understand the evolution of galaxies. Radio continuum (RC) emission serves as an extinction-free tracer of both massive star formation and the energetic components of the interstellar medium. We present a multi-band radio continuum survey of the local group galaxy M 33 down to ~30 pc linear resolution observed with the Karl G. Jansky Very Large Array (VLA). We calibrate the star-formation rate surface density and investigate the impact of diffuse emission on this calibration using a structural decomposition. Separating the thermal and nonthermal emission components, the correlation between different phases of the interstellar medium and the impact of massive star formation are also investigated. Radio sources with sizes <~ 200 pc constitute about 36% (46%) of the total RC emission at 1.5 GHz (6.3 GHz) in the inner 18' x 18' (or 4kpc x 4kpc) disk of M 33. The nonthermal spectral index becomes flatter with increasing star-formation rate surface density, indicating the escape of cosmic ray electrons {from their birth places}. The magnetic field strength also increases with star-formation rate following a bi-modal relation, indicating that the small-scale turbulent dynamo acts more efficiently at higher luminosities and star-formation rates. Although the correlations are tighter in star-forming regions, the nonthermal emission is correlated also with the more quiescent molecular gas in the ISM. An almost linear molecular star-formation law exists in M 33 when excluding diffuse structures. Massive star formation amplifies the magnetic field and increases the number of high-energy cosmic ray electrons, which can help the onset of winds and outflows.
The VLA-COSMOS 3 GHz Large Project: Star formation properties and radio luminosity functions of AGN with moderate-to-high radiative luminosities out to $z\sim6$
The UK Infrared Telescope M33 monitoring project. VI. Feedback from dusty stellar winds across the galactic disc
School of Astronomy, Institute for Research in Fundamental Sciences (IPM)(基础科学研究所);Lennard-Jones Laboratories, Keele University(基尔大学);Department of Physics, Sharif University of Technology(谢里夫理工大学);School of Physics, Birjand University(比尔詹德大学)
Unveiling Stellar Feedback and Cloud Structure in the $ρ$ Ophiuchi A Region with ALMA and JWST: Discovery of Substellar Cores, C$^{18}$O Striations, and Protostellar Outflows
A New Perspective on the Radio Active Zone at The Galactic Center - Feedback from Nuclear Activities
基于我们使用Jansky VLA在6 cm处观察到的宽带数据的Sgr A的深度图像,我们提出了银河系中心无线电亮区的新观点。我们进一步展示了X射线炮弹的无线电探测,一个与银河系中心SNR Sgr A东相关的候选中子星。射电图像与钱德拉X射线图像进行了比较,以显示双极X射线叶的射电对应物的详细结构。双极波瓣可能是由Sgr A West内部活动产生的风产生的,它可能是由CND中气体的惯性或Sgr A* 的动量驱动而准直的;极向磁场可能在准直中起重要作用。与NW波瓣相比,SE波瓣的准直度较低,这可能是由于Sgr A东SN可能局部地将磁场重新配置为朝向负银河纬度。与X射线观测结果相一致,估算的最外层射电环的~ $1\times10^4$年时间尺度似乎与推断的Sgr A East SNR的年龄相当。
Tracing Gas Kinematics and Interactions between H II Regions and Molecular Clouds using VLA Observations of Recombination Lines and Hydroxyl
Macquarie University(麦考瑞大学);California State University, Chico(奇科州立大学);University of Wisconsin--Madison(威斯康星大学麦迪逊分校);University of Sydney(悉尼大学);West Virginia University(西弗吉尼亚大学);University of Tasmania(塔斯马尼亚大学)
Searching for Stellar-Feedback-Driven Outflow Signatures: A Deep Dive into NGC 3741
Indiana University(印第安纳大学);Netherlands Institute for Radio Astronomy(荷兰射电天文研究所);University of Groningen(格罗宁根大学);Dartmouth College(达特茅斯学院);Space Telescope Science Institute(太空望远镜科学研究所);Rutgers, The State University of New Jersey(新泽西州立罗格斯大学);Princeton University(普林斯顿大学)
Diverse stages of star formation in the IRAS 18162-2048 region. Emergence of UV Feedback
Instituto de Astrofísica de Andalucía, CSIC(安达卢西亚天体物理研究所,西班牙科学理事会);INAF, Osservatorio Astronomico di Capodimonte(意大利国家天体物理研究所,卡波迪蒙特天文台);Departament de Física Quàntica i Astrofísica (FQA), Universitat de Barcelona (UB)(巴塞罗那大学量子物理与天体物理学系);Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona (UB)(巴塞罗那大学宇宙科学研究所);Thüringer Landessternwarte Tautenburg(图林根州陶滕堡天文台);Instituto de Astronomía Teórica y Experimental (IATE), Universidad Nacional de Córdoba (UNC)(科尔多瓦国立大学理论与实验天体物理研究所);Instituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México(墨西哥国立自治大学射电天文与天体物理研究所)
The Quasar Feedback Survey: Revealing the importance of sensitive radio imaging for AGN identification deeper into the radio-quiet regime
Newcastle University(纽卡斯尔大学);National Centre for Radio Astrophysics (NCRA) - Tata Institute of Fundamental Research (TIFR)(国家射电天体物理中心(NCRA)- 塔塔基础研究所(TIFR));Durham University(杜伦大学);European Southern Observatory (ESO)(欧洲南方天文台(ESO));Institut de Radioastronomie Millimétrique (IRAM)(毫米波射电天体物理研究所(IRAM));University of Hertfordshire(赫特福德大学)
Radio galaxies in galaxy groups: kinematics, scaling relations and AGN feedback
我们调查了一个大的(N=998)样本的COSMOS光谱星系成员分布在79组的运动学性质。我们确定了Brilliant Group Galeries(BGG),并将我们的数据与1.4 GHz的VLA-COSMOS深度调查进行交叉匹配,将我们的母样本分类为无线电/非无线电BGG和无线电/非无线电卫星。射电光度分布从$L_R\sim2\times10^{21}$ W Hz $^{-1}$到$L_R\sim3\times$ 10 $^{25}$ W Hz $^{-1}$。通过比较速度比(视线速度除以群速度色散)与星系群中心偏移量进行的相空间分析表明,BGG(无线电和非无线电)大多数($\sim$ 80\%)是古老的infaller。此外,最强的($L_R>10^{23}$ W Hz $^{-1}$)射电星系总是在距离群中心0.2 $R_{\rm vir}$以内。将我们的样本与HORIZON-AGN进行比较,我们发现模拟星系的速度和偏移量与无线电BGG比非无线电BGG更相似,尽管统计测试仍然突出了模拟和真实物体之间的显着差异。我们发现,广播BGG更有可能被托管在高质量的群体。最后,我们观察到BGG射电星系的功率与宿主群的X射线温度$T_{\rm x}$和X射线光度$L_{\rm x}$之间的相关性。这支持组内介质和中央无线电源之间的链路的存在。在星系群中心出现的强大射电星系可以用混沌冷吸积来…