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The morphology of molecular clouds is crucial for understanding their origin and evolution. In this work, we investigate the morphology of the filamentary molecular clouds (filaments for short) using a portion of the $^{12}\text{CO}…

Astrophysics of Galaxies · Physics 2024-03-26 Wen Ge , Fujun Du , Lixia Yuan

We investigated the widths and profiles of cosmic filaments using the IllustrisTNG simulations. Filaments were identified with DisPerSE, using galaxy samples in simulations as input. Since the width of an individual filament can vary…

Cosmology and Nongalactic Astrophysics · Physics 2025-09-18 Qi-Rui Yang , Weishan Zhu , GuangYao Yu , Jian-Feng Mo , Yi Zheng , Long-Long Feng

We present results of a wide-field (approximately 60 x 90 pc) ALMA mosaic of CO(2-1) and $^{13}$CO(2-1) emission from the molecular cloud associated with the 30 Doradus star-forming region. Three main emission complexes, including two…

We present the discovery of diffuse optical line emission in the Centaurus cluster seen with the MUSE IFU. The unparalleled sensitivity of MUSE allows us to detect the faint emission from these structures which extend well beyond the bounds…

Cosmology and Nongalactic Astrophysics · Physics 2019-01-18 S. L. Hamer , A. C. Fabian , H. R. Russell , P. Salomé , F. Combes , V. Olivares , F. L. Polles , A. C. Edge , R. S. Beckmann

We have observed the Galactic Center 50km/s molecular cloud (50MC) with ALMA to search for filamentary structures. In the CS J=2-1 emission line channel maps, we succeeded in identifying 27 molecular cloud filaments using the DisPerSE…

Astrophysics of Galaxies · Physics 2017-02-22 Kenta Uehara , Masato Tsuboi , Yoshimi Kitamura , Ryosuke Miyawaki , Atsushi Miyazaki

Dense molecular filaments are central to the star formation process, but the detailed manner in which they fragment into prestellar cores is not yet well understood. Here, we investigate the fragmentation properties and dynamical state of…

Solar and Stellar Astrophysics · Physics 2020-10-07 Guo Yin Zhang , Ph. Andre , A. Menshchikov , Ke Wang

High resolution surveys reveal that the interstellar medium in the Milky Way and nearby galaxies consists of interlinked hierarchies of filamentary structure and superbubbles extending from galactic to subpc scales. The characterization of…

Astrophysics of Galaxies · Physics 2025-08-20 Rachel Pillsworth , Erica Roscoe , Ralph E. Pudritz , Eric W. Koch

We present mapping results of two prestellar cores, L1544 and L694-2, embedded in filamentary clouds in C$^{18}$O (3-2), $^{13}$CO (3-2), $^{12}$CO (3-2), HCO$^+$ (4-3), and H$^{13}$CO$^+$ (4-3) with the JCMT telescope to examine the role…

We identify 225 filaments from an H$_2$ column density map constructed using simultaneous $^{12}$CO, $^{13}$CO, and C$^{18}$O (J=1-0) observations carried out as a part of the MWISP project. We select 46 long filaments with lengths above…

Astrophysics of Galaxies · Physics 2021-11-03 Yuqing Zheng , Hongchi Wang , Yuehui Ma , Chong Li

Optical emission is detected from filaments around the central galaxies of clusters of galaxies. These filaments have lengths of tens of kiloparsecs. The emission is possibly due to heating caused by the dissipation of mechanical energy and…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 E. Bayet , T. W. Hartquist , S. Viti , D. A. Williams , T. A. Bell

Dusty magnetized structures observable in the far-infrared (FIR) at high Galactic latitudes are ubiquitous and found to be closely related to HI filaments with coherent velocity structures. Considering dimensionless morphological…

Astrophysics of Galaxies · Physics 2023-05-17 P. M. W. Kalberla , U. Haud

Observations suggest that filaments in molecular clouds can grow by mass accretion while forming cores via fragmentation. Here we present one of the first large sample studies of filament accretion using velocity gradient measurements of…

We present a comprehensive analysis of dense cores and filamentary structures in the M16 Eagle Nebula using high-resolution ($11.7^{\prime\prime}$) surface density and temperature maps derived from \textit{Herschel} observations. Using the…

Astrophysics of Galaxies · Physics 2026-05-01 Nageen Pervaiz , Guo-Yin Zhang , Alexander Men'shchikov , Jin-Zeng Li

We present a multiwavelength investigation of the hub-filament system RCW 117 (IRAS 17059-4132), which shows intricate filamentary features in the far-infrared, mapped using Herschel images. We obtain the column density and dust temperature…

Astrophysics of Galaxies · Physics 2023-11-03 Arun Seshadri , S. Vig , S. K. Ghosh , D. K. Ojha

We introduce the NEXUS algorithm for the identification of Cosmic Web environments: clusters, filaments, walls and voids. This is a multiscale and automatic morphological analysis tool that identifies all the cosmic structures in a scale…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Marius Cautun , Rien van de Weygaert , Bernard J. T. Jones

The core velocity dispersion (CVD) is a potentially useful tool for studying the turbulent velocity field of molecular clouds. CVD is based on centroid velocities of dense gas clumps, thus is less prone to density fluctuation and reflects…

Astrophysics of Galaxies · Physics 2015-09-30 Lei Qian , Di Li , Stella Offner , Zhichen Pan

Filaments are ubiquitous structures in molecular clouds and play an important role in the mass assembly of stars. We present results of dynamical stability analyses for filaments in the infrared dark cloud G14.225$-$0.506, where a delayed…

We report on the filaments that develop self-consistently in a new numerical simulation of cloud formation by colliding flows. As in previous studies, the forming cloud begins to undergo gravitational collapse because it rapidly acquires a…

Astrophysics of Galaxies · Physics 2015-06-17 Gilberto C. Gomez , Enrique Vazquez-Semadeni

The initial and boundary conditions of the Galactic star formation in molecular clouds are not well understood. In an effort to shed new light on this long-standing problem, we measured properties of dense cores and filamentary structures…

Astrophysics of Galaxies · Physics 2023-06-28 Xue-Mei Li , Guo-Yin Zhang , Alexander Men'shchikov , Jin-Zeng Li , Chang Zhang , Zhong-Zu Wu

The large-scale structure of the Universe is characterised by a web-like structure made of voids, sheets, filaments, and knots. The structure of this so-called cosmic web is dictated by the local velocity shear tensor. In particular, the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 E. Tempel , N. I. Libeskind , Y. Hoffman , L. J. Liivamägi , A. Tamm
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