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In this paper we present the results of two detailed N-body simulations of the interaction of a sample of four massive globular clusters in the inner region of a triaxial galaxy. A full merging of the clusters takes place, leading to a…

Astrophysics · Physics 2009-11-13 R. Capuzzo-Dolcetta , P. Miocchi

We report that the gas components in the N59 bubble suffered from sequential multiple cloud-cloud collision (CCC) processes. The molecular gas in the N59 bubble can be decomposed into four velocity components, namely Cloud A [95, 108] km…

Astrophysics of Galaxies · Physics 2024-10-18 En Chen , Xi Chen , Xuepeng Chen , Min Fang , Qianru He

Collisions between particles suspended in a fluid play an important role in many physical processes. As an example, collisions of microscopic water droplets in clouds are a necessary step in the production of macroscopic raindrops.…

Fluid Dynamics · Physics 2016-04-20 Alain Pumir , Michael Wilkinson

The relationship between young stellar clusters and respective parental molecular clouds is still an open issue: for instance, are the similarities between substructures of clouds and clusters just a coincidence? Or would they be the…

Formation mechanism of a supergiant H II region NGC 604 is discussed in terms of collision of H I clouds in M33. An analysis of the archival H I data obtained with the Very Large Array (VLA) reveals complex velocity distributions around NGC…

Astrophysics of Galaxies · Physics 2018-06-13 Kengo Tachihara , Pierre Gratier , Hidetoshi Sano , Kisetsu Tsuge , Rie E. Miura , Kazuyuki Muraoka , Yasuo Fukui

We study effect of magnetic field on massive dense core formation in colliding unequal molecular clouds by performing magnetohydrodynamic simulations with sub-parsec resolution (0.015 pc) that can resolve the molecular cores. Initial clouds…

Astrophysics of Galaxies · Physics 2020-07-23 Nirmit Sakre , Asao Habe , Alex R. Pettitt , Takashi Okamoto

We use hydrodynamical simulations of a Cartwheel-like ring galaxy, modelled as a nearly head-on collision of a small companion with a larger disc galaxy, to probe the evolution of the gaseous structures and flows, and to explore the…

Astrophysics of Galaxies · Physics 2017-11-01 F. Renaud , E. Athanassoula , P. Amram , A. Bosma , F. Bournaud , P. -A. Duc , B. Epinat , J. Fensch , K. Kraljic , V. Perret , C. Struck

We present Nobeyama 45m telescope C18O, 13CO, and 12CO(1-0) mapping observations towards an interstellar filament in the Taurus molecular cloud. We investigate the gas velocity structure along the filament and in its surrounding parent…

Astrophysics of Galaxies · Physics 2018-09-26 Doris Arzoumanian , Yoshito Shimajiri , Shu-ichiro Inutsuka , Tsuyoshi Inoue , Kengo Tachihara

This paper gives a new way to diagnose the star-forming potential of a molecular cloud region from the probability density function of its column density (N-pdf). It gives expressions for the column density and mass profiles of a symmetric…

Astrophysics of Galaxies · Physics 2015-05-06 Philip C. Myers

This paper focuses on NGC 454, a nearby interacting pair of galaxies (AM0112-554, RR23), composed of an early-type (NGC 454 E) and a star forming late-type companion (NGC 454 W). We aim at characterizing this wet merger candidate via a…

Astrophysics of Galaxies · Physics 2017-10-11 H. Plana , R. Rampazzo , P. Mazzei , A. Marino , Ph. Amram , A. L. B. Ribeiro

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 star-forming region W5 is a major part of the Cassiopeia OB6 association. Its internal structure and kinematics may provide hints of the star formation process in this region. Here, we present a kinematic study of young stars in W5…

Astrophysics of Galaxies · Physics 2023-08-16 Beomdu Lim , Jongsuk Hong , Jinhee Lee , Hyeong-Sik Yun , Narae Hwang , Byeong-Gon Park

Analyzing the dynamical state of nearby young massive star clusters is essential understanding star cluster formation and evolution during their earliest stages. In this work we analyze the stellar and gas kinematics of the young massive…

Solar and Stellar Astrophysics · Physics 2021-03-03 Peter Zeidler , Elena Sabbi , Antonella Nota , Anna F. McLeod

Stars form in dense, clustered environments, where feedback from newly formed stars eventually ejects the gas, terminating star formation and leaving behind one or more star clusters. Using the STARFORGE simulations, it is possible to…

We present a detailed stellar clustering analysis with the application of the two-point correlation function on distinct young stellar ensembles. Our aim is to understand how stellar systems are assembled at the earliest stages of their…

Astrophysics of Galaxies · Physics 2014-03-05 Dimitrios A. Gouliermis , Sacha Hony , Ralf S. Klessen

An investigation based on data from the spatially complete 2MASS Survey reveals that a remarkable burst of clustered star formation is taking place throughout the south-east quadrant of the Rosette Molecular Cloud. Compact clusters are…

Astrophysics · Physics 2009-11-10 J. Z. Li , M. D. Smith

We present the results of sulfur monoxide, SO line emission observations of G0.253+0.016 with the Atacama Large Millimeter/submillimeter Array (ALMA) at an angular resolution of 1.7 arcsec. The dense and massive molecular cloud of…

Astrophysics of Galaxies · Physics 2015-06-19 Aya E. Higuchi , James O. Chibueze , Asao Habe , Ken Takahira , Shuro Takano

Splash bridges are formed from the direct inelastic collision of gas-rich galaxies. Recent multi-wavelength observations of the Taffy galaxies, UGC 12914/15, have revealed complicated gas structures in the bridge. We have upgraded the…

Astrophysics of Galaxies · Physics 2020-01-15 Travis Yeager , Curt Struck

Filamentary molecular clouds are regarded as the place where newborn stars are formed. In particular, a hub region, a place where it appears as if several filaments are colliding, often indicates active star formation. To understand the…

Astrophysics of Galaxies · Physics 2023-09-06 Raiga Kashiwagi , Kazunari Iwasaki , Kohji Tomisaka

Pillars and globules are present in many high-mass star-forming regions, such as the Eagle nebula (M16) and the Rosette molecular cloud, and understanding their origin will help characterize triggered star formation. The formation…

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