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Circumstellar discs around solar-mass stars in NGC 6611

Oliveira, J.M.; Jeffries, R.D.; Th. van Loon, J.; Littlefair, S.P.; Naylor, T.

Circumstellar discs around solar-mass stars in NGC 6611 Thumbnail


Authors

S.P. Littlefair

T. Naylor



Abstract

We have performed IZJHKL' observations in NGC 6611, the young cluster that ionises the Eagle Nebula. We have discovered a rich pre-main sequence concentrated around the O-stars in the cluster. As measured by their L'-band excesses, at least 58% +/- 5% of the pre-main sequence objects (0.45 Msun < M < 2 Msun) have circumstellar discs. By comparing this disc frequency with frequencies determined for regions where the pre-main sequence stars are subject to less ionising radiation, we find no evidence that the harsher environment of NGC 6611 (approximately an order of magnitude more ionising Lyman continuum radiation than the Trapezium cluster) significantly hastens the dissipation of circumstellar discs around solar-mass stars.

Journal Article Type Article
Online Publication Date Mar 1, 2005
Publication Date 2005-03
Publicly Available Date Mar 28, 2024
Journal Monthly Notices of the Royal Astronomical Society: Letters
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 358
Issue 1
Pages L21-L24
DOI https://doi.org/10.1111/j.1745-3933.2005.00020.x
Keywords Astrophysics
Publisher URL https://doi.org/10.1111/j.1745-3933.2005.00020.x

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