3D dynamics of the Orion cloud complex -- Discovery of coherent radial gas motions at the 100-pc scale

Abstract

We present the first study of the 3D dynamics of the gas in the entire southern Orion cloud complex. We used the parallaxes and proper motions of YSOs from Gaia DR2 as a proxy for gas distance and proper motion, and the gas radial velocities from archival CO data, to compute the space motions of the different star-forming clouds in the complex, including subregions in Orion A, Orion B, and two outlying cometary clouds. From the analysis of the clouds' orbits in space and time, we find that they were closest about 6 Myr ago and are moving radially away from roughly the same region in space. This coherent 100-pc scale radial motion supports a scenario where the entire complex is reacting to a major feedback event, which we name the Orion-BB (big blast) event. This event, which we tentatively associate with the recently discovered Orion X stellar population, shaped the distribution and kinematics of the gas we observe today, although it is unlikely to have been the sole major feedback event in the region. We argue that the dynamics of most of the YSOs carry the memory of the feedback-driven star formation history in Orion and that the majority of the young stars in this complex are a product of large-scale triggering, which can raise the star formation rate by at least an order of magnitude, as for the head of Orion A (the Integral Shape Filament). Our results imply that a feedback, compression, and triggering process lies at the genesis of the Orion Nebula Cluster and NGC2023/2024 in Orion B, thus confirming broadly the classical feedback-driven scenario proposed in Elmegreen & Lada (1977). The space motions of the well-known young compact clusters, $\sigma$ Orionis and NGC 1977, are consistent with this scenario. A momentum estimate suggests that the energy of a few to several supernovae is needed to power the coherent 3D gas motion we measure in this paper.

Accepted by A&A on 17.11.2020, 36 pages, 21 figures, 6 tables

References in corpus (44)

• The NumPy array: a structure for efficient numerical computation
• The Gaia mission
• galpy: A Python Library for Galactic Dynamics
• The distance to the Orion Nebula
• Trigonometric Parallaxes Of High-Mass Star Forming Regions: Our View Of The Milky Way
• APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South
• Momentum Injection by Supernovae in the Interstellar Medium
• Gaia Data Release 1: Catalogue validation
• Pulkovo Compilation of Radial Velocities for 35495 Hipparcos Stars in a Common System
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE) Spectrographs
• A Large Catalog of Accurate Distances to Local Molecular Clouds: The Gaia DR2 Edition
• Before the first supernova: combined effects of HII regions and winds on molecular clouds
• The Gould's Belt Distances Survey (GOBELINS) II. Distances and structure towards the Orion Molecular Clouds
• A Compendium of Distances to Molecular Clouds in the Star Formation Handbook
• A Large Catalog of Accurate Distances to Molecular Clouds from PS1 Photometry
• A Galactic-scale gas wave in the Solar Neighborhood
• Kinematic Structure of the Orion Nebula Cluster and its Surroundings
• Revealing the physical properties of molecular gas in Orion with a large scale survey in J=2-1 lines of 12CO, 13CO and C18O
• The Cloud Factory I: Generating resolved filamentary molecular clouds from galactic-scale forces
• Gone With the Wind: Where is the Missing Stellar Wind Energy from Massive Star Clusters?
• A Tale of Three Cities: OmegaCAM discovers multiple sequences in the color-magnitude diagram of the Orion Nebula Cluster
• Expanding bubbles in Orion A: [CII] observations of M42, M43, and NGC 1977
• Calculation of the Local Standard of Rest from 20,574 Local Stars in the New Hipparcos Reduction with Known Radial Velocities
• Evidence for Early Circumstellar Disk Evolution in NGC 2068/71
• Supernova feedback and the energy deposition in molecular clouds
• When the tale comes true: multiple populations and wide binaries in the Orion Nebula Cluster
• The role of galactic dynamics in shaping the physical properties of giant molecular clouds in Milky Way-like galaxies
• Star-Gas Surface Density Correlations in Twelve Nearby Molecular Clouds I: Data Collection and Star-Sampled Analysis
• Lynds 1622: a nearby star forming cloud projected on Orion B?
• Gaia Stellar Kinematics in the Head of the Orion A Cloud: Runaway Stellar Groups and Gravitational Infall
• Triggered Star Formation on the Border of the Orion-Eridanus Superbubble
• Detailed 3D structure of OrionA in dust with Gaia DR2
• A dynamically young, gravitationally stable network of filaments in Orion B
• Supernovae in the Orion: the missing link in the star forming history of the region
• Star Formation in the Orion Nebula I: Stellar Content
• Kompaneets Model Fitting of the Orion-Eridanus Superbubble II: Thinking Outside of Barnard's Loop
• Orion revisited III. The Orion Belt population
• The Origin of Ionized Filaments Within the Orion-Eridanus Superbubble
• Kinematics of the Optically Visible YSOs Toward the Orion B Molecular Cloud
• Kompaneets Model Fitting of the Orion-Eridanus Superbubble
• Gas absorption and dust extinction towards the Orion Nebula Cluster
• The CARMA-NRO Orion Survey: Statistical Signatures of Feedback in the Orion A Molecular Cloud
• The Orion Molecular Cloud 2/3 and NGC 1977 Regions
• The Dispersed Young Population in Orion

Cited by in corpus (35)

• Star formation near the Sun is driven by expansion of the Local Bubble
• The star formation history of the Sco-Cen association. Coherent star formation patterns in space and time
• The star formation history of Upper Scorpius and Ophiuchus
• Significance Mode Analysis (SigMA) for hierarchical structures. An application to the Sco-Cen OB association
• Survey of Orion Disks with ALMA (SODA) II: UV-driven disk mass loss in L1641 and L1647
• Evidence for Radial Expansion at the Core of the Orion Complex with Gaia EDR3
• Untangling the Galaxy III: Photometric Search for Pre-main Sequence Stars with Deep Learning
• The Radcliffe Wave is Oscillating
• The $\rho$ Oph region revisited with Gaia EDR3
• Orion A's complete 3D magnetic field morphology
• The impact of primordial binary on the dynamical evolution of intermediate massive star clusters
• Evidence of a vertical kinematic oscillation beyond the Radcliffe Wave
• Numerical studies on the link between radioisotopic signatures on Earth and the formation of the Local Bubble. II. Advanced modeling of interstellar 26Al, 53Mn, 60Fe, and 244Pu influxes as traces of past supernovae in the solar neighborhood
• The GALAH survey: Chemical homogeneity of the Orion complex
• The impact of massive stars and black holes on the fate of open star clusters and their tidal streams
• Low Mass Stars as Tracers of Star and Cluster Formation
• The Corona Australis star formation complex is accelerating away from the Galactic plane
• Kinematics of the molecular interstellar medium probed by Gaia: steep velocity dispersion-size relation, isotropic turbulence, and location-dependent energy dissipation
• Large-scale expansion of OB stars in Cygnus
• A 3D View of Orion: I. Barnard's Loop
• A gravitational and dynamical framework of star formation: The Orion Nebula
• The physical properties of Cluster Chains
• Dynamical star forming history of Per OB2
• Gaia EDR3 comparative study of protoplanetary disk fractions in young stellar clusters
• A comparison of the Milky Way's recent star formation revealed by dust thermal emission and high-mass stars
• VISIONS: The VISTA Star Formation Atlas -- I. Survey overview
• The impact of HII regions on Giant Molecular Cloud properties in nearby galaxies sampled by PHANGS ALMA and MUSE
• Characterizing the 3D Kinematics of Young Stars in the Radcliffe Wave
• The Solar System's passage through the Radcliffe wave during the middle Miocene
• The Orion-Taurus ridge: a synchrotron radio loop at the edge of the Orion-Eridanus superbubble
• Lost Sisters Found: TESS and Gaia Reveal a Dissolving Pleiades Complex
• Precise determination of circumstellar disk lifetimes: Disk evolution in a single star-forming region
• The evolution of velocity dispersion in the Sco-Cen OB association
• Direct measurement of ISM proper motion with image registration
• Is the Young Star Association $\epsilon$Cha Double?