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Supersonic Expansion of the Bipolar H ii Region Sh2-106: A 3500 Year Old Explosion?
dc.contributor.author | Bally, John | |
dc.contributor.author | Chia, Zen | |
dc.contributor.author | Ginsburg, Adam | |
dc.contributor.author | Reipurth, Bo | |
dc.contributor.author | Tanaka, Kei E. I. | |
dc.contributor.author | Zinnecker, Hans | |
dc.contributor.author | Faulhaber, John | |
dc.date.accessioned | 2024-04-10T06:20:37Z | |
dc.date.available | 2024-04-10T06:20:37Z | |
dc.date.issued | 2022 | |
dc.identifier | 10.3847/1538-4357/ac30de | |
dc.identifier.issn | 0004637X | |
dc.identifier.uri | https://hdl.handle.net/20.500.12728/10963 | |
dc.description.abstract | Multi-epoch narrowband Hubble Space Telescope images of the bipolar H ii region Sh2-106 reveal highly supersonic nebular proper motions that increase with projected distance from the massive young stellar object S106 IR, reaching over ∼30 mas yr-1 (∼150 km s-1 at D = 1.09 kpc) at a projected separation of ∼1.′4 (0.44 pc) from S106 IR. We propose that S106 IR experienced a ∼1047 erg explosion ∼3500 yr ago. The explosion may be the result of a major accretion burst or a recent encounter with another star, or a consequence of the interaction of a companion with the bloated photosphere of S106 IR as it grew from ∼10 through ∼15 M o˙ at a high accretion rate. Near-IR images reveal fingers of H2 emission pointing away from S106 IR and an asymmetric photon-dominated region surrounding the ionized nebula. Radio continuum and Brγ emission reveal a C-shaped bend in the plasma, indicating either the motion of S106 IR toward the east, or the deflection of plasma toward the west by the surrounding cloud. The H ii region bends around a ∼1′ diameter dark bay west of S106 IR that may be shielded from direct illumination by a dense molecular clump. Herbig-Haro and Molecular Hydrogen Objects tracing outflows powered by stars in the Sh2-106 protocluster such as the Class 0 source S106 FIR are discussed. © 2022. The Author(s). Published by the American Astronomical Society.. | es_ES |
dc.language.iso | en | es_ES |
dc.publisher | IOP Publishing Ltd | es_ES |
dc.title | Supersonic Expansion of the Bipolar H ii Region Sh2-106: A 3500 Year Old Explosion? | es_ES |
dc.type | Article | es_ES |