113 citations · 844 across the 31 of their papers we have counts for
24 papers · 1 filter
ALMAGAL V. Relations between the core populations and the parent clump physical properties
D. Elia, A. Coletta, S. Molinari +54
Context. The fragmentation of massive molecular clumps into smaller, potentially star-forming cores plays a key role in the processes of high-mass star formation. The ALMAGAL proje…
ALMAGAL III. Compact source catalog: Fragmentation statistics and physical evolution of the core population
A. Coletta, S. Molinari, E. Schisano +49
The mechanisms behind the fragmentation of high-mass dense clumps into compact star-forming cores are fundamental topics in current astrophysical research. The ALMAGAL survey provi…
Dynamical Accretion Flows -- ALMAGAL: Flows along filamentary structures in high-mass star-forming clusters
M. R. A. Wells, H. Beuther, S. Molinari +47
We use data from the ALMA Evolutionary Study of High Mass Protocluster Formation in the Galaxy (ALMAGAL) survey to study 100 ALMAGAL regions at 1 arsecond resolution located…
GMF G214.5-1.8 as traced by CO: I -- cloud-scale CO freeze-out as a result of a low cosmic-ray ionisation rate
S. D. Clarke, V. A. Makeev, Á. Sánchez-Monge +6
We present an analysis of the outer Galaxy giant molecular filament (GMF) G214.5-1.8 (G214.5) using IRAM 30m data of CO, CO and CO. We find that the CO…
Unravelling the structure of magnetised molecular clouds with SILCC-Zoom: sheets, filaments and fragmentation
S. Ganguly, S. Walch, D. Seifried +2
To what extent magnetic fields affect how molecular clouds (MCs) fragment and create dense structures is an open question. We present a numerical study of cloud fragmentation using…
Unveiling the formation of the massive DR21 ridge
L. Bonne, S. Bontemps, N. Schneider +10
We present new CO(1-0), CO(1-0), HCO(1-0) and HCO(1-0) maps from the IRAM 30m telescope, and a spectrally-resolved [CII] 158 m map observed with…
A Herschel study of G214.5-1.8: a young, cold and quiescent giant molecular filament on the shell of a HI superbubble
S. D. Clarke, A. Sanchez-Monge, G. M. Williams +3
We present an analysis of the outer Galaxy giant molecular filament (GMF) G214.5-1.8 (G214.5) using Herschel data. We find that G214.5 has a mass of 16,000 M, yet…
RJ-plots: An improved method to classify structures objectively
Seamus D. Clarke, Sarah E. Jaffa, Anthony P. Whitworth
The interstellar medium is highly structured, presenting a range of morphologies across spatial scales. The large data sets resulting from observational surveys and state-of-the-ar…
Understanding star formation in molecular clouds IV. Column density PDFs from quiescent to massive molecular clouds
N. Schneider, V. Ossenkopf-Okada, S. Clarke +26
We present N-PDFs of 29 Galactic regions obtained from Herschel imaging at high angular resolution, covering diffuse and quiescent clouds, and those showing low-, intermediate-, an…
From Bubbles and Filaments to Cores and Disks: Gas Gathering and Growth of Structure Leading to the Formation of Stellar Systems
Jaime E. Pineda, Doris Arzoumanian, Philippe André +8
The study of the development of structures on multiple scales in the cold interstellar medium has experienced rapid expansion in the past decade, on both the observational and the…
SILCC-Zoom: the dynamic balance in molecular cloud substructures
S. Ganguly, S. Walch, S. D. Clarke +1
How molecular clouds fragment and create the dense structures which go on to form stars is an open question. We investigate the relative importance of different energy terms (kinet…
Synthetic CO emission and the factor of young molecular clouds: a convergence study
Elisabeth M. A. Borchert, Stefanie Walch, Daniel Seifried +3
The properties of synthetic CO emission from 3D simulations of forming molecular clouds are studied within the SILCC-Zoom project. Since the time scales of cloud evolution and mole…
Formation of the Musca filament: Evidence for asymmetries in the accretion flow due to a cloud-cloud collision
L. Bonne, S. Bontemps, N. Schneider +11
Context. Dense molecular filaments are ubiquituous in the interstellar medium, yet their internal physical conditions and formation mechanism remain debated. Aims. We study the kin…
Dense gas formation in the Musca filament due to the dissipation of a supersonic converging flow
L. Bonne, N. Schneider, S. Bontemps +9
Observations with the Herschel Space Telescope have established that most of the star forming gas is organised in interstellar filaments, a finding that is supported by numerical s…
The hierarchical fragmentation of filaments and the role of sub-filaments
S. D. Clarke, G. M. Williams, S. Walch
Recent observations have revealed the presence of small fibres or sub-filaments within larger filaments. We present a numerical fragmentation study of fibrous filaments investigati…
L1495 Revisited: A PPMAP View of a Star-Forming Filament
A. D. P. Howard, A. P. Whitworth, K. A. Marsh +4
We have analysed the Herschel and SCUBA-2 dust continuum observations of the main filament in the Taurus L1495 star forming region, using the Bayesian fitting procedure PPMAP. (i)…
Determining the presence of characteristic fragmentation length-scales in filaments
S. D. Clarke, G. M. Williams, J. C. Ibáñez-Mejía +1
Theories suggest that filament fragmentation should occur on a characteristic fragmentation length-scale. This fragmentation length-scale can be related to filament properties, suc…
Dust charge distribution in the interstellar medium
Juan C. Ibáñez-Mejía, Stefanie Walch, Alexei V. Ivlev +3
We investigate the equilibrium charge distribution of dust grains in the interstellar medium (ISM). Our treatment accounts for collisional charging by electrons and ions, photoelec…
On the resolution requirements for modelling molecular gas formation in solar neighbourhood conditions
P. R. Joshi, S. Walch, D. Seifried +3
The formation of molecular hydrogen (H) and carbon monoxide (CO) is sensitive to the volume and column density distribution of the turbulent interstellar medium. In this paper,…
Synthetic [CII] emission maps of a simulated molecular cloud in formation
A. Franeck, S. Walch, D. Seifried +10
The C ion is an important coolant of interstellar gas, and so the [CII] fine structure line is frequently observed in the interstellar medium. However, the physical and chemi…
Synthetic CO observations of fibrous filaments: the problems of mapping from PPV to PPP
S. D. Clarke, A. P. Whitworth, R. L. Spowage +5
Molecular-line observations of filaments in star-forming regions have revealed the existence of elongated coherent features within the filaments; these features are termed fibres.…
J plots: a new method for characterizing structures in the interstellar medium
S. E. Jaffa, A. P. Whitworth, S. D. Clarke +1
Large scale surveys have brought about a revolution in astronomy. To analyse the resulting wealth of data, we need automated tools to identify, classify, and quantify the important…
Filamentary fragmentation in a turbulent medium
S. D. Clarke, A. P. Whitworth, A. Duarte-Cabral +1
We present the results of smoothed particle hydrodynamic simulations investigating the evolution and fragmentation of filaments that are accreting from a turbulent medium. We show…
Perturbation growth in accreting filaments
Seamus D. Clarke, Anthony P. Whitworth, David A. Hubber
We use smoothed particle hydrodynamic simulations to investigate the growth of perturbations in infinitely long, initially sub-critical but accreting filaments. The growth of these…