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

Schoettler, Christina; Parker, Richard J.

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