Erratum: Revisiting the Cygnus OB associations

Quintana, Alexis L; Wright, N. J.

doi:10.1093/mnras/stac232

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…Therefore it would appear that the large-scale expansion we have identified began before these stars and clusters formed and thus the driving force of the expansion would have acted on the primordial molecular clouds and not the stars we observe today. The traceback ages are also consistent with the expansion ages for the individual OB associations estimated by Quintana & Wright ( 2021, 2022, which are themselves larger than the evolutionary ages for the associations. This suggests that the expansion of the individual OB associations was not driven by their own (stellar) dynamics or processes such as residual gas expulsion, but was seeded prior to their formation, potentially by the same process responsible for the large-scale expansion patterns studied here.…”

Section: Discussionsupporting

confidence: 78%

Large-scale expansion of OB stars in Cygnus

Quintana

Wright

2022

Monthly Notices of the Royal Astronomical Society

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The proper motions (PMs) of OB stars in Cygnus have recently been found to exhibit two large-scale kinematic patterns suggestive of expansion. We perform a 3D traceback on these OB stars, the newly-identified OB associations and related open clusters in the region. We find that there are two groups of stars, associations and clusters and that they were each more compact in the past, reaching their closest approach $7.9^{+3.0}_{-1.8}$ and $8.5^{+0.8}_{-2.8}$ Myr ago. We consider two main scenarios for the driver of these large-scale expansion patterns: feedback-driven expansion from a previous generation of massive stars, and expansion as a result of the turbulent velocity field in the primordial molecular cloud. While it is tempting to attribute such large-scale expansion patterns to feedback processes, we find that the observed kinematics are fully consistent with the turbulent origin, and therefore that the injection of further energy or momentum from feedback is not required. Similar conclusions may be drawn for other star forming regions with large-scale expansion patterns.

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Section: Discussionsupporting

confidence: 78%

Large-scale expansion of OB stars in Cygnus

Quintana

Wright

2022

Monthly Notices of the Royal Astronomical Society

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A New Revision of the Stellar Content and Physical Properties of the Young Open Cluster vdB 130 in the Region of the Stellar Association Cyg OB1 Based on Gaia DR3 Data

et al. 2023

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Large-scale expansion of OB stars in Cygnus

Quintana,

Wright

2022

Preprint

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The proper motions (PMs) of OB stars in Cygnus have recently been found to exhibit two large-scale kinematic patterns suggestive of expansion. We perform a 3D traceback on these OB stars, the newly-identified OB associations and related open clusters in the region. We find that there are two groups of stars, associations and clusters and that they were each more compact in the past, reaching their closest approach 7.9 +3.0 −1.8 and 8.5 +0.8 −2.8 Myr ago. We consider two main scenarios for the driver of these large-scale expansion patterns: feedback-driven expansion from a previous generation of massive stars, and expansion as a result of the turbulent velocity field in the primordial molecular cloud. While it is tempting to attribute such large-scale expansion patterns to feedback processes, we find that the observed kinematics are fully consistent with the turbulent origin, and therefore that the injection of further energy or momentum from feedback is not required. Similar conclusions may be drawn for other star forming regions with large-scale expansion patterns.

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Erratum: Revisiting the Cygnus OB associations

Cited by 3 publications

References 2 publications

Large-scale expansion of OB stars in Cygnus

Large-scale expansion of OB stars in Cygnus

A New Revision of the Stellar Content and Physical Properties of the Young Open Cluster vdB 130 in the Region of the Stellar Association Cyg OB1 Based on Gaia DR3 Data

Large-scale expansion of OB stars in Cygnus

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