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IC 2602: a lithium depletion boundary age and new candidate low-mass stellar members
Citation
Dobbie, PD and Lodieu, N and Sharp, RG, IC 2602: a lithium depletion boundary age and new candidate low-mass stellar members, Monthly Notices of the Royal Astronomical Society, 409, (3) pp. 1002-1012. ISSN 0035-8711 (2010) [Refereed Article]
Copyright Statement
Copyright 2010 The Authors. Journal compilation Copyright 2010 RAS.
DOI: doi:10.1111/j.1365-2966.2010.17355.x
Abstract
We report the results from a photometric and spectroscopic survey of ∼1.4 deg2 of the young open cluster IC 2602. Fourteen objects have been identified as having magnitudes, spectral types and radial velocities consistent with being probable or possible low-mass stellar members of the cluster. We have used the observed location of the lithium depletion boundary in the sequence defined by these objects to place a new and improved constraint on the cluster age, τ = 46+6−5 Myr. This new determination is larger by a factor ∼1.3–1.8 than the majority of age estimates which have been obtained using the main-sequence turn-off or pre-main-sequence isochrone techniques. It is thus consistent with the trend indicated by the results of similar studies on other young open clusters. Based on this new age, we set a lower limit on the cluster mass function over the range M = 0.054 − 0.24 M⊙, dn/dM > 46 M−1⊙. If the mass function of IC 2602 has a form similar to that of other young clusters and associations then future wide, deep surveys can expect to unearth at least a handful of brown dwarfs which could potentially serve as benchmark objects.
Item Details
Item Type: | Refereed Article |
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Keywords: | techniques: photometric; brown dwarfs; stars: low-mass; open clusters and associations: individual: IC 2602 |
Research Division: | Physical Sciences |
Research Group: | Astronomical sciences |
Research Field: | Stellar astronomy and planetary systems |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the physical sciences |
UTAS Author: | Dobbie, PD (Dr Paul Dobbie) |
ID Code: | 81004 |
Year Published: | 2010 |
Web of Science® Times Cited: | 47 |
Deposited By: | Mathematics and Physics |
Deposited On: | 2012-11-20 |
Last Modified: | 2013-06-27 |
Downloads: | 0 |
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