SIMBAD references

2014MNRAS.442.2543Y - Mon. Not. R. Astron. Soc., 442, 2543-2559 (2014/August-2)

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

YASUI C., KOBAYASHI N., TOKUNAGA A.T. and SAITO M.

Abstract (from CDS):

We derived the intermediate-mass ( ≃ 1.5-7M) 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 ( ≃ 1.5-7 M). 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 excess emission but no K-band excess emission, are more common than classical Herbig Ae/Be stars, which exhibit both. We suggest that this prominent early disappearance of the K disc for IM stars is due to dust settling/growth in the protoplanetary disc, and it could be one of the major reasons for the paucity of close-in planets around IM stars.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): planets and satellites: formation - protoplanetary discs - circumstellar matter - stars: pre main-sequence - stars: variables: T Tauri, Herbig Ae/Be - infrared: stars

VizieR on-line data: <Available at CDS (J/MNRAS/442/2543): table1.dat appen.dat appendix.pdf>

Status in Simbad:  could be processed

Simbad objects: 36

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2019.12.12-08:09:20

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