The complexity of Orion: an ALMA view III. The explosion impact

Abstract

The chemistry of complex organic molecules in interstellar dark clouds is still highly uncertain in part because of the lack of constraining observations. Orion is the closest massive star-forming region, and observations making use of ALMA allow us to separate the emission regions of various complex organic molecules (COMs) in both velocity and space. Orion also benefits from an exceptional situation, in that it is the site of a powerful explosive event that occurred 550 years ago. We show that the closely surrounding Kleinmann-Low region has clearly been influenced by this explosion; some molecular species have been pushed away from the densest parts while others have remained in close proximity. This dynamical segregation reveals the time dependence of the chemistry and, therefore allows us to better constrain the formation sequence of COMs and other species, including deuterated molecules.

arXiv comment10 pages, 7 figures, Letter to A&A accepted for publication

References in corpus (19)

• Proper Motions of the BN Object and the I Radio Source in Orion: Where and When Did BN Become a Runaway Star?
• Explosive Disintegration of a Massive Young Stellar System in Orion
• Dynamical decay of a massive multiple system in Orion KL?
• The ALMA View of the OMC1 Explosion in Orion
• Ortho-H2 and the Age of Interstellar Dark Clouds
• Orion KL: The hot core that is not a "Hot Core"
• Detection of the Ammonium Ion in Space
• High Angular Resolution Mid-infrared Imaging of Young Stars in Orion BN/KL
• The Orion Nebula in the mid-IR
• Chemical segregation of complex organic O-bearing species in Orion KL
• Herschel observations of Extra-Ordinary Sources: Methanol as a probe of physical conditions in Orion KL
• The complexity of Orion: an ALMA view. II. gGg'-Ethylene Glycol and Acetic Acid
• The Proper Motions of the Double Radio Source n in the Orion BN/KL Region
• New Evidence for the Dynamical Decay of a Multiple System in the Orion Kleinmann-Low Nebula
• A 3D view of the outflow in the Orion Molecular Cloud 1 (OMC-1)
• ALMA Images of the Orion Hot Core at 349 GHz
• Laboratory rotational ground state transitions of NH${}_3$D${}^{+}$ and CF${}^{+}$
• ALMA observations of the archetypal "hot core" that isn't: Orion KL
• The Orion fingers: Near-IR spectral imaging of an explosive outflow

Cited by in corpus (9)

• Astrochemistry During the Formation of Stars
• ALMA-IMF I -- Investigating the origin of stellar masses: Introduction to the Large Program and first results
• Shocking Sgr B2(N1) with its own outflow: A new perspective on segregation between O- and N-bearing molecules
• Chemical composition in the IRAS 16562--3959 high-mass star-forming region
• The Explosion in Orion-KL as Seen by Mosaicking the Magnetic Field with ALMA
• Proper Motions of the Radio Source Orion MR, Formerly Known as Orion n, and New Sources with Large Proper Motions in Orion BN/KL
• Evidence for dense gas heated by the explosion in Orion KL
• Observational evidence for rotational desorption of Complex Molecules by radiative torques from Orion BN/KL
• PRODIGE - envelope to disk with NOEMA: V. Low 12C/13C ratios for CH3OH and CH3CN in hot corinos