Dust disks around star in young clusters : J/MNRAS/442/2543


Authors : Yasui C. orcid , Kobayashi N., Tokunaga A.T. (hide) , Kobayashi N., Tokunaga A.T. et..al

Bibcode : 2014MNRAS.442.2543Y (ADS) (Simbad) (Objects) (hide)

CDS Keywords : Associations, stellar; MK spectral classification
UAT : Stellar associations, Morgan-Keenan classification

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Inserted into VizieR : 19-Jun-2015
Last modification : 09-Aug-2024

Rapid evolution of the innermost dust disc of protoplanetary discs surrounding intermediate-mass stars. (2014)

Keywords : planets and satellites formation - protoplanetary discs - circumstellar matter - stars: pre main-sequence - stars: variables: T Tauri, Herbig Ae/Be - infrared: stars

Abstract:We derived the intermediate-mass (=~1.5-7M_{sun}_) disc fraction (IMDF) in the near-infrared JHK photometric bands as well as in the mid-infrared (MIR) bands for young clusters in the age range of 0 to ~10Myr. From the JHK IMDF, the lifetime of the innermost dust disc (~0.3au; hereafter the K disc) is estimated to be ~3Myr, suggesting a stellar mass (M*) dependence of K-disc lifetime (=~1.5-7M_{sun}_). However, from the MIR IMDF, the lifetime of the inner disc (~5au; hereafter the MIR disc) is estimated to be ~6.5Myr, suggesting a very weak stellar mass dependence (M*). The much shorter K-disc lifetime compared to the MIR-disc lifetime for intermediate-mass (IM) stars suggests that IM stars with transition discs, which have only MIR ...(more)
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