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Ammonia Fitting of Multiple Velocity Components in High-Mass Star-Forming Regions
T. Withers, S. Sadavoy, M. Chen +19
We perform a multiple velocity component analysis of ammonia (NH) gas from KEYSTONE, a Green Bank Telescope survey covering 11 giant molecular clouds (GMCs) at distances from 0…
The Magnetized Universe: From planet-forming disks to the high-redshift universe
Josep M Girart, Gary Fuller, Wouter Vlemmings +32
The interstellar medium (ISM) is magnetized at all scales and phases in our Galaxy and other galaxies across the Universe. Spectro-polarimetric millimetre observations are essentia…
DAWN. I. Simulating the formation and early evolution of stellar clusters with Phantom N-Body
Yann Bernard, Estelle Moraux, Daniel J. Price +3
Context. Simulating stellar dynamics in a molecular cloud environment is numerically challenging due to the strong coupling between young stars and their surrounding gas, and the l…
Observations of Carbon Radio Recombination Lines with the NenuFAR telescope. I. Cassiopeia A and Cygnus A
Lucie Cros, Antoine Gusdorf, Philippe Salomé +26
Carbon Radio Recombination Lines (CRRLs) at decametre wavelengths trace the diffuse phase of the interstellar medium (ISM) of the Galaxy. Their observation allows to measure physic…
The interdependence between density PDF, CMF and IMF and their relation with Mach number in simulations
Arturo Nuñez-Castiñeyra, Matthias González, Noé Brucy +3
The initial mass function (IMF) of stars and the corresponding cloud mass function (CMF), traditionally considered universal, exhibit variations that are influenced by the local en…
Statistical model for filamentary structures of molecular clouds -- The modified multiplicative random cascade model and its multifractal nature
Jean-François Robitaille, Abdelhalim Abdeldayem, Isabelle Joncour +4
We propose a new statistical model that can reproduce the hierarchical nature of the ubiquitous filamentary structures of molecular clouds. This model is based on the multiplicativ…
Outflows, cores and magnetic field orientations in W43-MM1 as seen by ALMA
C. Arce-Tord, F. Louvet, P. C. Cortes +7
It has been proposed that the magnetic field, pervasive in the ISM, plays an important role in the process of massive star formation. To better understand its impact at the pre and…
The Herschel view of the dense core population in the Ophiuchus molecular cloud
Bilal Ladjelate, Philippe André, Vera Könyves +13
Herschel observations of nearby clouds in the Gould Belt support a paradigm for low-mass star formation, starting with the generation of molecular filaments, followed by filament f…
Molecular analysis of a high-mass prestellar core candidate in W43-MM1
J. Molet, N. Brouillet, T. Nony +6
High-mass analogues of low-mass prestellar cores are searched for to constrain the models of high-mass star formation. Several high-mass cores, at various evolutionary stages, have…
The unexpectedly large proportion of high-mass star-forming cores in a Galactic mini-starburst
F. Motte, T. Nony, F. Louvet +14
Understanding the processes that determine the stellar Initial Mass Function (IMF) is a critical unsolved problem, with profound implications for many areas of astrophysics. In mol…
Young Stellar Objects in the Massive Star-Forming Regions W51 and W43
G. Saral, J. L. Hora, M. Audard +6
We present the results of our investigation of the star-forming complexes W51 and W43, two of the brightest in the first Galactic quadrant. In order to determine the young stellar…
The earliest phases of high-mass star formation, as seen in NGC 6334 by \emph{Herschel}
J. Tigé, F. Motte, D. Russeil +33
To constrain models of high-mass star formation, the Herschel/HOBYS KP aims at discovering massive dense cores (MDCs) able to host the high-mass analogs of low-mass prestellar core…
Tracing extended low-velocity shocks through SiO emission - Case study of the W43-MM1 ridge
F. Louvet, F. Motte. A. Gusdorf, Q. Nguyen-Luong +7
Previous literature suggests that the densest structures in the interstellar medium form through colliding flows, but patent evidence of this process is still missing. Recent liter…
Characterizing filaments in regions of high-mass star formation: High-resolution submilimeter imaging of the massive star-forming complex NGC 6334 with ArTéMiS
Ph. André, V. Revéret, V. Könyves +28
Herschel observations of nearby molecular clouds suggest that interstellar filaments and prestellar cores represent two fundamental steps in the star formation process. The observa…
ATLASGAL-selected massive clumps in the inner Galaxy, II: Characterisation of different evolutionary stages and their SiO emission
T. Csengeri, S. Leurini, F. Wyrowski +12
The processes leading to the birth of high-mass stars are poorly understood. We characterise here a sample of 430 massive clumps from the ATLASGAL survey, which are representative…
Environmental regulation of cloud and star formation in galactic bars
F. Renaud, F. Bournaud, E. Emsellem +7
The strong time-dependence of the dynamics of galactic bars yields a complex and rapidly evolving distribution of dense gas and star forming regions. Although bars mainly host regi…
A possible link between the power spectrum of interstellar filaments and the origin of the prestellar core mass function
A. Roy, Ph. Andre', D. Arzoumanian +17
Two major features of the prestellar CMF are: 1) a broad peak below 1 Msun, presumably corresponding to a mean gravitational fragmentation scale, and 2) a characteristic power-law…
Understanding star formation in molecular clouds III. Probability distribution functions of molecular lines in Cygnus X
N. Schneider, S. Bontemps, F. Motte +11
Column density (N) PDFs serve as a powerful tool to characterize the physical processes that influence the structure of molecular clouds. Star-forming clouds can best be characteri…
Detection of two power-law tails in the probability distribution functions of massive GMCs
N. Schneider, S. Bontemps, P. Girichidis +20
We report the novel detection of complex high-column density tails in the probability distribution functions (PDFs) for three high-mass star-forming regions (CepOB3, MonR2, NGC6334…
Filaments in the Lupus molecular clouds
M. Benedettini, E. Schisano, S. Pezzuto +19
We have studied the filaments extracted from the column density maps of the nearby Lupus 1, 3, and 4 molecular clouds, derived from photometric maps observed with the Herschel sate…
A census of dense cores in the Aquila cloud complex: SPIRE/PACS observations from the Herschel Gould Belt survey
V. Konyves, Ph. Andre, A. Men'shchikov +29
We present and discuss the results of the Herschel Gould Belt survey observations in a ~11 deg^2 area of the Aquila molecular cloud complex at d~260 pc, imaged with the SPIRE/PACS…
Herschel Observations of the W3 GMC (II): Clues to the Formation of Clusters of High-Mass Stars
A. Rivera-Ingraham, P. G. Martin, D. Polychroni +18
The W3 GMC is a prime target for investigating the formation of high-mass stars and clusters. This second study of W3 within the HOBYS Key Program provides a comparative analysis o…
The Three-mm Ultimate Mopra Milky Way Survey. II. Cloud and Star Formation Near the Filamentary Ministarburst RCW 106
Hans Nguyen, Quang Nguyen Luong, Peter G. Martin +9
We report here a study of gas, dust and star formation rates (SFRs) in the molecular cloud complexes (MCCs) surrounding the giant H region RCW106 using…
SiO emission from low- and high-velocity shocks in Cygnus-X massive dense clumps
A. Duarte-Cabral, S. Bontemps, F. Motte +4
We used PdBI observations of SiO (2-1) to investigate the morphology and profile of the SiO emission within several massive dense clumps (MDCs) in Cygnus-X. We find that most molec…