Multi-scale analysis of the Monoceros OB 1 star-forming region: II. Colliding filaments in the Monoceros OB1 molecular cloud

Abstract

We started a multi-scale analysis of G202.3+2.5, an intertwined filamentary region of Monoceros OB1. In Paper I, we examined the distributions of dense cores and protostars and found enhanced star formation (SF) activity in the junction region of the filaments. In this second paper, we aim to unveil the connections between the core and filament evolutions, and between the filament dynamics and the global evolution of the cloud. We characterise the gas dynamics and energy balance using Herschel and WISE observations and molecular tracers observed with the IRAM 30m and TRAO 14m telescopes. The velocity field of the cloud is examined and velocity-coherent structures are put in perspective with the cloud environment. Two main velocity components (VCs) are revealed, well separated in the north and merged around the location of intense N2H+ emission where Paper I found the peak of SF activity. The relative position of the two VCs along the sightline, and the velocity gradient in N2H+ emission imply that the VCs have been undergoing collision for ~10^5 yrs. The dense gas where N2H+ is detected is interpreted as the compressed region between the two filaments, which corresponds to a high mass inflow rate of ~1e-3 Msun/yr and possibly leads to an increase in its SF efficiency. We identify a protostar in the junction region that possibly powers two crossed intermittent outflows. We show that the HII region around the nearby cluster NCG 2264 is still expanding and its role in the collision is examined. However, we cannot rule out the idea that the collision arises mostly from the global collapse of the cloud. The (sub-)filament-scale observables examined in this paper reveal a collision between G202.3+2.5 sub-structures and its probable role in feeding the cores in the junction region. One must now characterise the cloud morphology, its fragmentation, and magnetic field, all at high resolution.

arXiv commentA&A, in press; IRAM and TRAO data cubes will be available at CDS

References in corpus (68)

• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Theory of Star Formation
• The Photodetector Array Camera and Spectrometer (PACS) on the Herschel Space Observatory
• The Herschel-SPIRE instrument and its in-flight performance
• From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt survey
• Interpreting Spectral Energy Distributions from Young Stellar Objects. I. A grid of 200,000 YSO model SEDs
• The Cologne Database for Molecular Spectroscopy, CDMS, in the Virtual Atomic and Molecular Data Centre, VAMDC
• A Full-Sky H-alpha Template for Microwave Foreground Prediction
• High-Mass Star and Massive Cluster Formation in the Milky Way
• Cores, filaments, and bundles: hierarchical core formation in the L1495/B213 Taurus region
• The WISE Catalog of Galactic HII Regions
• The relation between gas and dust in the Taurus Molecular Cloud
• TADPOL: A 1.3 mm Survey of Dust Polarization in Star-forming Cores and Regions
• Cloud-Scale Molecular Gas Properties in 15 Nearby Galaxies
• SDC13 infrared dark clouds: Longitudinally collapsing filaments?
• An ALMA study of the Orion Integral Filament: I. Evidence for narrow fibers in a massive cloud
• The Effect of Line of Sight Temperature Variation and Noise on Dust Continuum Observations
• Magnetic Fields and Massive Star Formation
• The anatomy of the Orion B Giant Molecular Cloud: A local template for studies of nearby galaxies
• Planck Early Results: The Galactic Cold Core Population revealed by the first all-sky survey
• A sub-parsec resolution simulation of the Milky Way: Global structure of the ISM and properties of molecular clouds
• Comparing Star Formation on Large Scales in the c2d Legacy Clouds: Bolocam 1.1 mm Dust Continuum Surveys of Serpens, Perseus, and Ophiuchus
• The Circumstellar Environment of High Mass Protostellar Objects. III Evidence of Infall?
• Probing the formation of intermediate- to high-mass stars in protoclusters: A detailed millimeter study of the NGC 2264 clumps
• Galactic cold cores III. General cloud properties
• The Effect of Noise on the Dust Temperature - Spectral Index Correlation
• Parsec-scale SiO Emission in an Infrared Dark Cloud
• On the nature of star-forming filaments: II. Sub-filaments and velocities
• The JCMT BISTRO Survey: The magnetic field strength in the Orion A filament
• High- and Low-Mass Star Forming Regions from Hierarchical Gravitational Fragmentation. High local Star Formation Rates with Low Global Efficiencies
• Evaporating Very Small Grains as tracers of the UV radiation field in Photo-dissociation Regions
• On the frequency of N2H+ and N2D+
• Gas dynamics in Massive Dense Cores in Cygnus-X
• Fibers in the NGC1333 proto-cluster
• The dangers of being trigger--happy
• Infall through the evolution of high-mass star-forming clumps
• 350 micron Polarimetry from the Caltech Submillimeter Observatory
• Planck 2015 results. XXVIII. The Planck Catalogue of Galactic Cold Clumps
• The Musca cloud: A 6 pc-long velocity-coherent, sonic filament
• Accuracy of core mass estimates in simulated observations of dust emission
• Supernova Driving. IV. The Star Formation Rate of Molecular Clouds
• Testing Larson's relationships in massive clumps
• The ATLASGAL survey: distribution of cold dust in the Galactic plane. Combination with Planck data
• A holistic perspective on the dynamics of G035.39-00.33: the interplay between gas and magnetic fields
• A Full-sky, High-resolution Atlas of Galactic 12 micron Dust Emission with WISE
• Cluster Formation Triggered by Filament Collisions in Serpens South
• The degeneracy between dust colour temperature and spectral index. Comparison of methods for estimating the beta(T) relation
• The TOP-SCOPE survey of Planck Galactic Cold Clumps: Survey overview and results of an exemplar source, PGCC G26.53+0.17
• Evolution of Magnetic Fields in High Mass Star Formation: SMA dust polarization image of the UCHII region G5.89-0.39
• Unveiling the Early-Stage Anatomy of a Protocluster Hub with ALMA
• Gas-phase CO depletion and N2H+ abundances in starless cores
• Massive 70 micron quiet clumps II: non-thermal motions driven by gravity in massive star formation?
• The Gaia-ESO Survey and CSI 2264: Substructures, disks, and sequential star formation in the young open cluster NGC 2264
• The Initial Mass Function and Young Brown Dwarf Candidates in NGC 2264. IV. The Initial Mass Function and Star Formation History
• Polarization Properties and Magnetic Field Structures in the High-Mass Star-Forming Region W51 Observed with ALMA
• Star Formation in Massive Protoclusters in the Monoceros OB1 Dark Cloud
• Interferometric mapping of magnetic fields: The ALMA view of the massive star forming clump W43-MM1
• Massive 70 micron quiet clumps I: evidence of embedded low/intermediate-mass star formation activity
• Gas flows around 2 young stellar clusters in NGC2264
• SCOPE: SCUBA-2 Continuum Observations of Pre-protostellar Evolution - Survey Description and Compact Source Catalogue
• A Spitzer View of Mon OB1 East/NGC 2264
• Planck cold clumps in the $\lambda$ Orionis complex: I. Discovery of an extremely young Class 0 protostellar object and a proto-brown dwarf candidate in a bright rimmed clump PGCC G192.32-11.88
• The classical D-type expansion of spherical H II regions
• Galactic Cold Cores. VIII. Filament formation and evolution: Filament properties in context with evolutionary models
• Wide-Field ${}^{12}$CO ($J=2-1$) and ${}^{13}$CO ($J=2-1$) Observations toward the Aquila Rift and Serpens Molecular Cloud Complexes. I. Molecular Clouds and Their Physical Properties
• The structure of molecular gas associated with NGC2264: wide-field 12CO and H2 imaging
• Multi-scale analysis of the Monoceros OB 1 star-forming region: I. The dense core population
• Compressed magnetic field in the magnetically-regulated global collapsing clump of G9.62+0.19

Cited by in corpus (18)

• Unifying low and high mass star formation through density amplified hubs of filaments
• Mass segregation and sequential star formation in NGC 2264 revealed by Herschel
• Star-forming sites IC 446 and IC 447: an outcome of end-dominated collapse of Monoceros R1 filament
• Formation of the SDC13 Hub-Filament System: A Cloud-Cloud Collision Imprinted on The Multiscale Magnetic Field
• Large-scale magnetic field in the Monoceros OB-1 East molecular cloud
• A Naive Bayes Classifier for identifying Class II YSOs
• Spatial and dynamical structure of the NGC 2264 star-forming region
• New Herbig-Haro objects and outflows in Mon R1 association
• ALMA-IMF XVIII: The assembly of a star cluster: Dense N${}_2$H${}^{+}$ (1-0) kinematics in the massive G351.77 protocluster
• A Multi-wavelength Study on the Formation of AFGL 333-Ridge
• Probing the Global Dust Properties and Cluster Formation Potential of the Giant Molecular Cloud G148.24+00.41
• A High-Mass Young Star-forming Core Escaping from Its Parental Filament
• Comparison of Herschel and ArTéMiS observations of massive filaments
• Monoceros OB4: a new association in Gaia DR2
• Near-infrared detection of H${}_2$ flows in the core of Mon R1 association
• A Gaia view on the star formation in the Monoceros OB1 and R1 associations
• Assessing membership projection errors in star forming regions
• Evolution of compressed clouds formed by filament coalescence. I. Oblique collisions