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The G31.41+0.31 (G31) hot molecular core (HMC) is a high-mass protocluster showing accelerated infall and rotational spin-up that is well studied at high-angular resolution. To complement the accurate view of the small scale in G31, we have…

Astrophysics of Galaxies · Physics 2022-04-13 M. T. Beltrán , V. M. Rivilla , M. S. N. Kumar , R. Cesaroni , D. Galli

We performed a large-scale mapping observation toward the W33 complex and its surroundings, covering an area of $1.3^\circ \times 1.0^\circ$ , in $^{12}$CO (1-0), $^{13}$CO (1-0), and C$^{18}$O (1-0) lines from the Purple Mountain…

Astrophysics of Galaxies · Physics 2021-02-24 Xiao-Lan Liu , Jin-Long Xu , Jun-Jie Wang , Nai-Ping Yu , Chuan-Peng Zhang , Nan Li , Guo-Yin Zhang

We present a gas kinematic study of the massive protocluster G318.049+00.086. The protocluster is reported to contain 12 prestellar core candidates and 4 protostellar cores. Filamentary structures are identified using the 1.3 mm dust…

To probe star formation processes, we present a multi-scale and multi-wavelength investigation of the `Snake' nebula/infrared dark cloud G11.11$-$0.12 (hereafter, G11; length $\sim$27 pc). Spitzer images hint at the presence of…

Astrophysics of Galaxies · Physics 2023-11-01 L. K. Dewangan , N. K. Bhadari , A. K. Maity , C. Eswaraiah , Saurabh Sharma , O. R. Jadhav

Hub-filament systems are considered as natural sites for high-mass star formation. Kinematic analysis of the surroundings of hub-filaments is essential to better understand high-mass star formation within such systems. In this work, we…

We present a multi-scale and multi-wavelength study to unveil massive star formation (MSF) processes around sites AFGL 5180, and AFGL 6366S, both hosting a Class II 6.7 GHz methanol maser emission. The radio continuum map at 8.46 GHz…

Astrophysics of Galaxies · Physics 2023-06-14 A. K. Maity , L. K. Dewangan , N. K. Bhadari , D. K. Ojha , Z. Chen , Rakesh Pandey

Young Stellar Objects (YSOs) in the inner Galactic region $10^0 < l < 15^0$ and $-1^0 < b < 1^0$ are studied using GLIMPSE images and GLIMPSE data catalogue. A total number of 1107 Class I and 1566 Class II sources are identified in this…

Solar and Stellar Astrophysics · Physics 2013-07-22 B Bhavya , Annapurni Subramaniam , V C Kuriakose

We use a suite of high resolution molecular cloud simulations carried out with the moving mesh code Arepo to explore the nature of star-forming filaments. The simulated filaments are identified and categorised from column density maps in…

Astrophysics of Galaxies · Physics 2015-06-22 Rowan J. Smith , Simon C. O. Glover , Ralf. S. Klessen

Observations of molecular clouds reveal a complex structure, with gas and dust often arranged in filamentary rather than spherical geometries. The associations of pre- and proto- stellar cores with the filaments suggest a direct link with…

Herschel surveys of Galactic clouds support a paradigm for low-mass star formation in which dense filaments play a crucial role. The detailed fragmentation properties of star-forming filaments remain poorly understood, however, and the…

Astrophysics of Galaxies · Physics 2019-12-11 Y. Shimajiri , Ph. Andre , E. Ntormousi , A. Men'shchikov , D. Arzoumanian , P. Palmeirim

There is growing evidence that high-mass star formation (HMSF) is a multiscale, dynamical process in molecular clouds, where filaments transport gas material between larger and smaller scales. We analyze here multiscale gas dynamics in an…

Astrophysics of Galaxies · Physics 2024-01-04 Sirong Pan , Hong-Li Liu , Sheng-Li Qin

The mid- and far-infrared view on high-mass star formation, in particular with the results from the Herschel space observatory, has shed light on many aspects of massive star formation. However, these continuum studies lack kinematic…

Astrophysics of Galaxies · Physics 2014-05-21 J. Tackenberg , H. Beuther , Th. Henning , H. Linz , T. Sakai , S. E. Ragan , O. Krause , M. Nielbock , M. Hennemann , J. Pitann , A. Schmiedeke

To understand the formation process of massive stars, we present a multi-scale and multi-wavelength study of the W31 complex hosting two extended HII regions (i.e., G10.30-0.15 (hereafter, W31-N) and G10.15-0.34 (hereafter, W31-S)) powered…

Astrophysics of Galaxies · Physics 2022-07-27 A. K. Maity , L. K. Dewangan , H. Sano , K. Tachihara , Y. Fukui , N. K. Bhadari

We study the G013.313+0.193 G013.313 region, a complex environment characterized by molecular cloud interactions indicative of cloud-cloud collision (CCC). Observations of the NH3(1,1) and (2,2) inversion transitions were obtained using the…

We performed a multi-wavelength study toward the filamentary cloud G47.06+0.26 to investigate the gas kinematics and star formation. We present the 12CO (J=1-0), 13CO (J=1-0) and C18O (J=1-0) observations of G47.06+0.26 obtained with the…

Astrophysics of Galaxies · Physics 2018-01-10 Jin-Long Xu , Ye Xu , Chuan-Peng Zhang , Xiao-Lan Liu , Naiping Yu , Chang-Chun Ning , Bing-Gang Ju

Filamentary structures are ubiquitous in high-mass star-forming molecular clouds. Their relation with high-mass star formation is still to be understood. Here we report interferometric observations toward 8 filamentary high-mass…

Herschel observations of nearby molecular clouds suggest that interstellar filaments and prestellar cores represent two fundamental steps in the star formation process. The observations support a picture of low-mass star formation according…

Specific indications of star-formation are presented within cluster and filament galaxies that are members of the Horologium-Reticulum supercluster (HRS, z ~0.06). These indicators arise from multi-wavelength observations, primarily…

Cosmology and Nongalactic Astrophysics · Physics 2009-09-02 Matthew C. Fleenor , Melanie Johnston-Hollitt

Context. G29.96-0.02 is a high-mass star-forming cloud observed at 70, 160, 250, 350, and 500 microns as part of the Herschel survey of the Galactic Plane during the Science Demonstration Phase. Aims. We wish to conduct a far-infrared study…

The IRDC G14.225-0.506 is associated with a network of filaments, which result in two different dense hubs, as well as with several signposts of star formation activity. The aim of this work is to study the cm continuum emission to…