Gas kinematics around filamentary structures in the Orion B cloud

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dc.contributor.authorGaudel, Mathilde
dc.contributor.authorOrkisz, Jan H.
dc.contributor.authorGerin, Maryvonne
dc.contributor.authorPety, Jerome
dc.contributor.authorRoueff, Antoine
dc.contributor.authorMarchal, Antoine
dc.contributor.authorLevrier, Francois
dc.contributor.authorMiville-Deschenes, Marc-Antoine
dc.contributor.authorGoicoechea, Javier R.
dc.contributor.authorRoueff, Evelyne
dc.contributor.authorLe Petit, Franck
dc.contributor.authorMagalhaes, Victor de Souza
dc.contributor.authorPalud, Pierre
dc.contributor.authorSanta-Maria, Miriam G.
dc.contributor.authorVono, Maxime
dc.contributor.authorBardeau, Sebastien
dc.contributor.authorBron, Emeric
dc.contributor.authorChainais, Pierre
dc.contributor.authorChanussot, Jocelyn
dc.contributor.authorGratier, Pierre
dc.contributor.authorGuzman, Viviana
dc.contributor.authorHughes, Annie
dc.contributor.authorKainulainen, Jouni
dc.contributor.authorLanguignon, David
dc.contributor.authorLe Bourlot, Jacques
dc.contributor.authorLiszt, Harvey
dc.contributor.authorOberg, Karin
dc.contributor.authorPeretto, Nicolas
dc.contributor.authorSievers, Albrecht
dc.contributor.authorTremblin, Pascal
dc.date.accessioned2025-01-20T20:17:16Z
dc.date.available2025-01-20T20:17:16Z
dc.date.issued2023
dc.description.abstractContext. Understanding the initial properties of star-forming material and how they affect the star formation process is key. From an observational point of view, the feedback from young high-mass stars on future star formation properties is still poorly constrained.Aims. In the framework of the IRAM 30m ORION-B large program, we obtained observations of the translucent (2 <= A(V) < 6 mag) and moderately dense gas (6 <= A(V) < 15 mag), which we used to analyze the kinematics over a field of 5 deg(2) around the filamentary structures.Methods. We used the Regularized Optimization for Hyper-Spectral Analysis (ROHSA) algorithm to decompose and de-noise the (CO)-O-18(1-0) and (CO)-C-13(1-0) signals by taking the spatial coherence of the emission into account. We produced gas column density and mean velocity maps to estimate the relative orientation of their spatial gradients.Results. We identified three cloud velocity layers at different systemic velocities and extracted the filaments in each velocity layer. The filaments are preferentially located in regions of low centroid velocity gradients. By comparing the relative orientation between the column density and velocity gradients of each layer from the ORION-B observations and synthetic observations from 3D kinematic toy models, we distinguish two types of behavior in the dynamics around filaments: (i) radial flows perpendicular to the filament axis that can be either inflows (increasing the filament mass) or outflows and (ii) longitudinal flows along the filament axis. The former case is seen in the Orion B data, while the latter is not identified. We have also identified asymmetrical flow patterns, usually associated with filaments located at the edge of an H II region.Conclusions. This is the first observational study to highlight feedback from H II regions on filament formation and, thus, on star formation in the Orion B cloud. This simple statistical method can be used for any molecular cloud to obtain coherent information on the kinematics.
dc.fuente.origenWOS
dc.identifier.doi10.1051/0004-6361/202142109
dc.identifier.eissn1432-0746
dc.identifier.issn0004-6361
dc.identifier.urihttps://doi.org/10.1051/0004-6361/202142109
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92386
dc.identifier.wosidWOS:000932395400001
dc.language.isoen
dc.revistaAstronomy & astrophysics
dc.rightsacceso restringido
dc.subjectISM
dc.subjectkinematics and dynamics
dc.subjectclouds
dc.subjectindividual objects
dc.subjectOrion B
dc.subjectHII regions
dc.subjectstars
dc.subjectformation
dc.subjectradio lines
dc.titleGas kinematics around filamentary structures in the Orion B cloud
dc.typeartículo
dc.volumen670
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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