Measurements of Li in T-Tauri stars : J/MNRAS/434/966

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Authors : Sergison D.J. orcid , Mayne N.J., Naylor T. (hide) , Mayne N.J., Naylor T. et..al

VizieR DOI : 10.26093/cds/vizier.74340966
Bibcode : 2013MNRAS.434..966S (ADS) (Simbad) (Objects)
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CDS Keywords : Clusters, open; Stars, pre-main sequence; Abundances
UAT : Open star clusters, Pre-main sequence stars, Chemical abundances

Observation (OC)

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Inserted into VizieR : 24-Sep-2014
Last modification : 06-Aug-2024

No evidence for intense, cold accretion on to YSOs from measurements of Li in T-Tauri stars. (2013)

Keywords : stars pre-main-sequence - open clusters and associations: individual: NGC 1976 - open clusters and associations: individual: NGC 2264

Abstract:We have used medium-resolution spectra to search for evidence that proto-stellar objects accrete at high rates during their early 'assembly phase'. Models predict that depleted lithium and reduced luminosity in T-Tauri stars are key signatures of 'cold' high-rate accretion occurring early in a star's evolution. We found no evidence in 168 stars in NGC 2264 and the Orion nebula cluster for strong lithium depletion through analysis of veiling-corrected 6708{AA} lithium spectral line strengths. This suggests that 'cold' accretion at high rates (dM/dt>=5x10^-4^M_{sun}_/yr) occurs in the assembly phase of fewer ...(more)
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Monthly Notices policies
The observations were made on the nights of 2011 November 20, 21 using the AF2/WYFFOS multi-object fibre-fed spectrograph on the 4.2m William Herschel Telescope.

  • J/ApJ/671/605 : NGC 2264 and ONC PMS stars in the infrared (Cieza+, 2007)
  • J/ApJ/648/1090 : Radial velocities of NGC 2264 stars (Furesz+, 2006)
  • J/AJ/127/1117 : Halpha emission-line stars in NGC2264 (Reipurth+, 2004)
  • J/ApJS/208/28 : H{alpha} survey in the ONC (Szegedi-Elek+, 2013)

                


                

                    

                


                

                    

                


                

                    
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