Oliveira, JM and Jeffries, RD and Loon, JTV and Littlefair, SP and Naylor, T (2005) Circumstellar discs around solar-mass stars in NGC 6611. Monthly Notices of the Royal Astronomical Society, 358. ISSN 1365-2966

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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.

Item Type: Article
Uncontrolled Keywords: circumstellar matter, stars: late-type, stars: pre-main-sequence, open clusters and associations: individual: NGC 6611, infrared: stars
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Natural Sciences > School of Physical and Geographical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 20 Aug 2015 13:54
Last Modified: 26 May 2016 11:35
URI: http://eprints.keele.ac.uk/id/eprint/829

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