SIMBAD references

2005MNRAS.358...13J - Mon. Not. R. Astron. Soc., 358, 13-29 (2005/March-3)

The lithium depletion boundary in NGC 2547 as a test of pre-main-sequence evolutionary models.


Abstract (from CDS):

Intermediate resolution spectroscopy from the European Southern Observatory Very Large Telescope is analysed for 63 photometrically selected low-mass (0.08-0.30 M) candidates of the open cluster NGC 2547. We have confirmed membership for most of these stars using radial velocities, and found that lithium remains undepleted for cluster stars with I > 17.54±0.14 and Ks > 14.86±0.12. From these results, several pre-main-sequence evolutionary models give almost model independent ages of 34-36 Myr, with a precision of 10 per cent. These ages are only slightly larger than the ages of 25-35(±5) Myr obtained using the same models to fit isochrones to higher mass stars descending towards the zero-age main-sequence, both in empirically calibrated and theoretical colour-magnitude diagrams. This agreement between age determinations in different mass ranges is an excellent test of the current generation of low-mass pre-main-sequence stellar models and lends confidence to ages determined with either method between 30 and 120 Myr.

Abstract Copyright: 2005 RAS

Journal keyword(s): stars: abundances - stars: late-type - open clusters and associations: individual: NGC 2547

VizieR on-line data: <Available at CDS (J/MNRAS/358/13): table1.dat>

Nomenclature: Table 1: Cl* NGC 2547 JO NN (Nos 1-63).

Status at CDS:  

CDS comments: P.25 : Star RX 2 = [JT98] 2.

Simbad objects: 20

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