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Double trouble: Gaia reveals (proto)planetary systems that may experience more than one dense star-forming environment

Schoettler, Christina; Parker, Richard J.

Authors

Richard J. Parker



Abstract

Planetary systems appear to form contemporaneously around young stars within young star-forming regions. Within these environments, the chances of survival, as well as the long-term evolution of these systems, are influenced by factors such as dynamical interactions with other stars and photoevaporation from massive stars. These interactions can also cause young stars to be ejected from their birth regions and become runaways. We present examples of such runaway stars in the vicinity of the Orion Nebula Cluster (ONC) found in Gaia DR2 data that have retained their discs during the ejection process. Once set on their path, these runaways usually do not encounter any other dense regions that could endanger the survival of their discs or young planetary systems. However, we show that it is possible for star–disc systems, presumably ejected from one dense star-forming region, to encounter a second dense region, in our case the ONC. While the interactions of the ejected star–disc systems in the second region are unlikely to be the same as in their birth region, a second encounter will increase the risk to the disc or planetary system from malign external effects.

Citation

Schoettler, C., & Parker, R. J. (2021). Double trouble: Gaia reveals (proto)planetary systems that may experience more than one dense star-forming environment. Monthly Notices of the Royal Astronomical Society, 501(1), L12-L17. https://doi.org/10.1093/mnrasl/slaa182

Journal Article Type Article
Acceptance Date Oct 22, 2020
Online Publication Date Dec 16, 2020
Publication Date 2021-01
Deposit Date Jan 27, 2025
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 501
Issue 1
Pages L12-L17
DOI https://doi.org/10.1093/mnrasl/slaa182
Keywords accretion, accretion discs, planets and satellites: formation, circumstellar matter, stars: kinematics and dynamics, galaxies: star clusters: individual: Orion Nebula Cluster
Public URL https://keele-repository.worktribe.com/output/1051804
Publisher URL https://academic.oup.com/mnrasl/article/501/1/L12/6028711