86 citations · 1.3k across the 103 of their papers we have counts for
21 papers · 1 filter
Cluster Formation in a Filamentary Cloud: The Case of the Stellar Cluster NGC 2316
Saurabh Sharma, Aayushi Verma, Kshitiz Mallick +7
We present a multi-wavelength analysis of the star cluster NGC 2316 and its surroundings. We estimated the physical parameters of the NGC 2316 cluster, including its shape (elongat…
The ALMA-QUARKS survey: -- I. Survey description and data reduction
Xunchuan Liu, Tie Liu, Lei Zhu +31
This paper presents an overview of the QUARKS survey, which stands for `Querying Underlying mechanisms of massive star formation with ALMA-Resolved gas Kinematics and Structures'.…
Galactic `Snake' IRDC G11.110.12: a site of multiple hub-filament systems and colliding filamentary clouds
L. K. Dewangan, N. K. Bhadari, A. K. Maity +3
To probe star formation processes, we present a multi-scale and multi-wavelength investigation of the `Snake' nebula/infrared dark cloud G11.110.12 (hereafter, G11; length $\sim…
Fragmentation and dynamics of dense gas structures in the proximity of massive young stellar object W42-MME
N. K. Bhadari, L. K. Dewangan, L. E. Pirogov +4
We present an analysis of the dense gas structures in the immediate surroundings of the massive young stellar object (MYSO) W42-MME, using the high-resolution (0.310$''…
The ALMA Survey of Star Formation and Evolution in Massive Protoclusters with Blue Profiles (ASSEMBLE): Core Growth, Cluster Contraction, and Primordial Mass Segregation
Fengwei Xu, Ke Wang, Tie Liu +40
The ALMA Survey of Star Formation and Evolution in Massive Protoclusters with Blue Profiles (ASSEMBLE) aims to investigate the process of mass assembly and its connection to high-m…
Merging Filaments and Hub Formation in the G083.09703.270 Molecular Complex
Alik Panja, Lokesh K. Dewangan, Tapas Baug +4
We uncover a hub-filament system associated with massive star formation in the G083.09703.270. Diagnosed with simultaneous CO, CO, and CO line observations,…
New insights in the bubble wall of NGC 3324: intertwined sub-structures and a bipolar morphology uncovered by JWST
L. K. Dewangan, A. K. Maity, Y. D. Mayya +4
We report the discovery of intertwined/entangled sub-structures towards the bubble wall of NGC 3324 below a physical scale of 4500 AU, which is the sharp edge/ionization front/elon…
Dissecting the morphology of star forming complex S193
Rakesh Pandey, Saurabh Sharma, Lokesh Dewangan +5
We have studied a star-forming complex S193 using near-infrared (NIR) observations and other archival data covering optical to radio wavelengths. We identified stellar clusters in…
Direct observational evidence of the multi-scale, dynamical mass accretion toward a high-mass star forming hub-filament system
Dongting Yang, Hong-Li Liu, Anandmayee Tej +28
There is growing evidence that high-mass star formation and hub-filament systems (HFS) are intricately linked. The gas kinematics along the filaments and the forming high-mass star…
Exploring Stellar Cluster and Feedback-driven Star Formation in Galactic Mid-infrared Bubble [HKS2019] E70
Aayushi Verma, Saurabh Sharma, Kshitiz K. Mallick +8
We present a comprehensive analysis of the Galactic mid-infrared (MIR) bubble [HKS2019] E70 (E70) by adopting a multi-wavelength approach to understand the physical environment and…
AFGL 5180 and AFGL 6366S: sites of hub-filament systems at the opposite edges of a filamentary cloud
A. K. Maity, L. K. Dewangan, N. K. Bhadari +3
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 methano…
Investigating star formation activity in the Sh 2-61 H II region
Rakesh Pandey, Saurabh Sharma, Lokesh Dewangan +4
Using the multiwavelength data sets, we studied the star formation activity in H II region Sh 2-61 (hereafter S61). We identified a clustering in the region and estimated the membe…
Structural Analysis of Open Cluster Bochum 2
Harmeen Kaur, Saurabh Sharma, Alok Durgapal +5
We present the results from our deep optical photometric observations of Bochum 2 (Boc2) star cluster obtained using the m Devasthal Fast Optical Telescope along with archival…
Near-Infrared Polarimetry and H emission toward Massive Young Stars: Discovery of a Bipolar Outflow associated to S235 e2s3
R. Devaraj, A. Caratti o Garatti, L. K. Dewangan +3
We present a near-infrared band polarimetric study toward the S235 e2s3 protostar, obtained using the POLICAN instrument on the 2.1m OAGH telescope. The images reveal a bipolar…
IC 5146 dark Streamer: is a first reliable candidate of edge collapse, hub-filament systems, and intertwined sub-filaments?
L. K. Dewangan, N. K. Bhadari, A. Men'shchikov +5
The paper presents an analysis of multi-wavelength data of a nearby star-forming site IC 5146 dark Streamer (d 600 pc), which has been treated as a single and long filament,…
Teutsch 76: a Deep Near-Infrared Study
Saurabh Sharma, Lokesh Dewangan, Neelam Panwar +9
We have performed a detailed analysis on the Teutsch 76 (T76) open cluster using the deep near-infrared (NIR) observations taken with the TANSPEC instrument mounted on the 3.6m Dev…
Structure and Kinematics of Sh2-138 -- A distant hub-filament system in the outer Galactic plane
Kshitiz Mallick, Lokesh Dewangan, Devendra Ojha +2
We present a molecular line study of the Sh2-138 (IRAS 22308+5812) hub-filament system with an aim to investigate its structure and kinematics. Archival CO molecular line data from…
Kronberger 55: A Candidate for End-dominated Collapse Scenario
Aayushi Verma, Saurabh Sharma, Lokesh Dewangan +5
Using optical photometric observations from 1.3m Devasthal Fast Optical Telescope and deep near-infrared (NIR) photometric observations from TANSPEC mounted on 3.6m Devasthal Optic…
Evidence of high-mass star formation through multi-scale mass accretion in hub-filament-system clouds
Hong-Li Liu, Anandmayee Tej, Tie Liu +30
We present a statistical study of a sample of 17 hub-filament-system (HFS) clouds of high-mass star formation using high-angular resolution (1-2 arcsecond) ALMA 1.3mm and 3mm…
Investigating the morphology and CO gas kinematics of Sh2-112 region
Kshitiz Mallick, Saurabh Sharma, Lokesh Dewangan +3
We present a study of the molecular cloud in Sh2-112 massive star forming region using the 3-2 transition of CO isotopologues - CO, 13CO, and C18O; supplemented in part by CGPS HI…
ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -- XV. Steady Accretion from Global Collapse to Core Feeding in Massive Hub-filament System SDC335
Feng-Wei Xu, Ke Wang, Tie Liu +37
We present ALMA Band-3/7 observations towards "the Heart" of a massive hub-filament system (HFS) SDC335, to investigate its fragmentation and accretion. At a resolution of $\sim0.0…