IC 2602: A lithium depletion boundary age and new candidate low-mass stellar members
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Dobbie, Paul; Lodieu, N; Sharp, Robert
Description
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...[Show more]
dc.contributor.author | Dobbie, Paul | |
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dc.contributor.author | Lodieu, N | |
dc.contributor.author | Sharp, Robert | |
dc.date.accessioned | 2015-12-13T22:45:07Z | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.uri | http://hdl.handle.net/1885/79609 | |
dc.description.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. | |
dc.publisher | Blackwell Publishing Ltd | |
dc.source | Monthly Notices of the Royal Astronomical Society | |
dc.subject | Keywords: Brown dwarfs; Open clusters and associations: individual: IC 2602; Stars: low-mass; Techniques: photometric | |
dc.title | IC 2602: A lithium depletion boundary age and new candidate low-mass stellar members | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 409 | |
dc.date.issued | 2010 | |
local.identifier.absfor | 020104 - Galactic Astronomy | |
local.identifier.ariespublication | f5625xPUB8014 | |
local.type.status | Published Version | |
local.contributor.affiliation | Dobbie, P, Australian Astronomical Observatory | |
local.contributor.affiliation | Lodieu, N, Instituto de Astrofísica de Canarias | |
local.contributor.affiliation | Sharp, Robert, College of Physical and Mathematical Sciences, ANU | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.issue | 3 | |
local.bibliographicCitation.startpage | 1002 | |
local.bibliographicCitation.lastpage | 1012 | |
local.identifier.doi | 10.1111/j.1365-2966.2010.17355.x | |
dc.date.updated | 2016-02-24T09:39:08Z | |
local.identifier.scopusID | 2-s2.0-78649722698 | |
Collections | ANU Research Publications |
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