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Filamentary molecular clouds are an essential intermediate stage in the star formation process. To test whether these structures are universal throughout cosmic star formation history, it is crucial to study low-metallicity environments…

For the past 150 years, the prevailing view of the local Interstellar Medium (ISM) was based on a peculiarity known as the Gould's Belt, an expanding ring of young stars, gas, and dust, tilted about 20$^\circ$ to the Galactic plane. Still,…

Knowledge of the three-dimensional structure of Galactic molecular clouds is important for understanding how clouds are affected by processes such as turbulence and magnetic fields and how this structure effects star formation within them.…

We present an analysis of the dense gas structures in the immediate surroundings of the massive young stellar object (MYSO) W42-MME, using the high-resolution (0$''$.31$\times$0$''$.25) ALMA dust continuum and molecular line data. We…

Astrophysics of Galaxies · Physics 2023-09-29 N. K. Bhadari , L. K. Dewangan , L. E. Pirogov , A. G. Pazukhin , I. I. Zinchenko , A. K. Maity , Saurabh Sharma

We present new CO (13CO(1-0) and C18O(1-0)) and CS(2-1) line observations of an elongated filamentary structure (length ~30 pc) in the star-forming site S242, which were taken with the OSO-20m telescope. One filament's end hosts the S242…

Astrophysics of Galaxies · Physics 2019-05-29 Lokesh K. Dewangan , Lev E. Pirogov , Olga L. Ryabukhina , Devendra K. Ojha , Igor I. Zinchenko

This study analyzes the sizes, shapes and correlations of $\lya$ clouds produced by a hydrodynamic simulation of a spatially flat CDM universe with a non-zero cosmological constant ($\Omega_0=0.4$, $\Lambda_0=0.6$, $\sigma_8 =0.79$), over…

Astrophysics · Physics 2016-09-07 Renyue Cen , Robert A. Simcoe

G351.776-0.527 is among the most massive, closest, and youngest filaments in the inner Galactic plane and therefore it is an ideal laboratory to study the kinematics of dense gas and mass replenishment on a large scale. In this paper, we…

The high latitude translucent molecular cloud L1642 has been mapped in the J=1-0 and J=2-1 transitions of 12CO, 13CO and C18O using the SEST radio telescope. We have analysed the morphology and velocity structure of the cloud using the…

Astrophysics · Physics 2009-11-10 D. Russeil , M. Juvela , K. Lehtinen , K. Mattila , P. Paatero

We present an analysis of new and archival ALMA observations of molecular gas in twelve central cluster galaxies. We examine emerging trends in molecular filament morphology and gas velocities to understand their origins. Molecular gas…

We explore a simple semi-analytic model for what happens when an O star (or cluster of O stars) forms in an isolated filamentary cloud. The model is characterised by three configuration parameters: the radius of the filament, R_FIL, the…

Astrophysics of Galaxies · Physics 2021-05-03 Anthony P Whitworth , Felix D Priestley

Large-scale gaseous filaments with length up to the order of 100 pc are on the upper end of the filamentary hierarchy of the Galactic interstellar medium. Their association with respect to the Galactic structure and their role in Galactic…

Astrophysics of Galaxies · Physics 2016-09-21 Ke Wang , Leonardo Testi , Andreas Burkert , C. Malcolm Walmsley , Henrik Beuther , Thomas Henning

The 3D structure of The Milky Way's Central Molecular Zone (CMZ) informs our understanding of star formation cycles, black hole accretion, and the evolution of galactic nuclei. However, a comprehensive 3D model has remained elusive, as no…

The Gaia mission has opened a new window into the internal kinematics of young star clusters at the sub-km/s level, with implications for our understanding of how star clusters form and evolve. We use a sample of 28 clusters and…

Astrophysics of Galaxies · Physics 2019-01-09 Michael A. Kuhn , Lynne A. Hillenbrand , Alison Sills , Eric D. Feigelson , Konstantin V. Getman

We present CO ($J = 1-0$) multi-line observations toward the L914 dark cloud in the vicinity of the Cygnus X region, using the 13.7 m millimeter telescope of the Purple Mountain Observatory (PMO). The CO observations reveal in the L914…

Astrophysics of Galaxies · Physics 2024-03-06 Li Sun , Xuepeng Chen , Min Fang , Shaobo Zhang , Yan Gong , Jiancheng Feng , Xuefu Li , Qing-Zeng Yan , Ji Yang

The first polarimetric images of the OMC-3 region of the Orion A filamentary molecular cloud are presented. Using the JCMT, we have detected polarized thermal emission at 850 microns from dust along a 6' length of the dense filament. The…

Astrophysics · Physics 2009-10-31 Brenda C. Matthews , Christine D. Wilson

We present a systematic analysis of scale-dependent properties of filamentary structures in seven nearby molecular clouds $-$ Taurus, Ophiuchus, Perseus, Orion A, California, IC 5146, Vela C $-$ using the multiscale extraction method…

Astrophysics of Galaxies · Physics 2026-05-06 Guo-Yin Zhang , Alexander Men'shchikov , Jin-Zeng Li

We examine the role of the gravitational instability in an isothermal, self-gravitating layer threaded by magnetic fields on the formation of filaments and dense cores. Using numerical simulation we follow the non-linear evolution of a…

Solar and Stellar Astrophysics · Physics 2015-06-19 Sven Van Loo , Eric Keto , Qizhou Zhang

We present the first detection of mass dependent galactic spin alignments with local cosmic filaments with over 2 sigma confidence using IFS kinematics. The 3D network of cosmic filaments is reconstructed on Mpc scales across GAMA fields…

To probe the initial conditions for high-mass star and cluster formation, we investigate the properties of dense filaments within the infrared dark cloud G035.39-00.33 (IRDC G035.39) in a combined Very Large Array (VLA) and the Green Bank…