Disc Clearing of Young Stellar Objects: Evidence for Fast Inside-out Dispersal

Abstract

The time-scale over which and the modality by which young stellar objects (YSOs) disperse their circumstellar discs dramatically influences the eventual formation and evolution of planetary systems. By means of extensive radiative transfer (RT) modelling, we have developed a new set of diagnostic diagrams in the infrared colour-colour plane (K-[24] vs. K-[8]), to aid with the classification of the evolutionary stage of YSOs from photometric observations. Our diagrams allow the differentiation of sources with unevolved (primordial) discs from those evolving according to different clearing scenarios (e.g. homologous depletion vs. inside-out dispersal), as well as from sources that have already lost their disc. Classification of over 1500 sources in 15 nearby star-forming regions reveals that approximately 39 % of the sources lie in the primordial disc region, whereas between 31 % and 32 % disperse from the inside-out and up to 22 % of the sources have already lost their disc. Less than 2 % of the objects in our sample lie in the homogeneous draining regime. Time-scales for the transition phase are estimated to be typically a few 10^5 years independent of stellar mass. Therefore, regardless of spectral type, we conclude that currently available infrared photometric surveys point to fast (of order 10 % of the global disc lifetime) inside-out clearing as the preferred mode of disc dispersal.

arXiv comment31 pages, 21 figures, 6 tables, accepted for publication in MNRAS

References in corpus (60)

• The Infrared Array Camera (IRAC) for the Spitzer Space Telescope
• The Spitzer Space Telescope Mission
• The Spitzer c2d Legacy Results: Star Formation Rates and Efficiencies; Evolution and Lifetimes
• The Infrared Spectrograph on the Spitzer Space Telescope
• A Hipparcos census of the nearby OB associations
• Protoplanetary Disks and Their Evolution
• Interpreting Spectral Energy Distributions from Young Stellar Objects. II. Fitting observed SEDs using a large grid of pre-computed models
• Interpreting Spectral Energy Distributions from Young Stellar Objects. I. A grid of 200,000 YSO model SEDs
• A Spitzer Survey of Young Stellar Clusters within One Kiloparsec of the Sun: Cluster Core Extraction and Basic Structural Analysis
• Dust coagulation in protoplanetary disks: a rapid depletion of small grains
• A Census of the Young Cluster IC 348
• Spitzer Space Telescope study of disks in the young $\sigma$ Orionis cluster
• 2-D Radiative Transfer in Protostellar Envelopes: I. Effects of Geometry on Class I Sources
• Photoevaporation of protoplanetary discs II: evolutionary models and observable properties
• 2-D Radiative Transfer in Protostellar Envelopes: II. An Evolutionary Sequence
• The Disk Population of the Taurus Star-Forming Region
• Radiation-Hydrodynamic Models of X-Ray & EUV Photoevaporating Protoplanetary Discs
• On the theory of disc photoevaporation
• Evidence for Mass-dependent Circumstellar Disk Evolution in the 5 Myr-old Upper Scorpius OB Association
• Photoevaporation of protoplanetary discs I: hydrodynamic models
• The Stellar Population of the Chamaeleon I Star-Forming Region
• The Taurus Spitzer Survey: New Candidate Taurus Members Selected Using Sensitive Mid-Infrared Photometry
• Transitional and Pre-Transitional disks: Gap Opening by Multiple Planets?
• Time-Evolution of Viscous Circumstellar Disks due to Photoevaporation by FUV, EUV and X-ray Radiation from the Central Star
• Protoplanetary disc evolution and dispersal: the implications of X-ray photoevaportion
• Astrometry of Water Maser Sources in Nearby Molecular Clouds with VERA - II. SVS 13 in NGC 1333
• The Distance to NGC 2264
• New Brown Dwarfs and an Updated Initial Mass Function in Taurus
• Destruction of protoplanetary disks in the Orion Nebula Cluster
• The Disk Around CoKu Tau/4: Circumbinary, not Transitional
• Herbig Ae/Be Stars in nearby OB associations
• Spitzer observations of the Orion OB1 association: disk census in the low mass stars
• An Infrared/X-ray Survey for New Members of the Taurus Star-Forming Region
• A Spitzer IRS Study of Infrared Variability in Transitional and Pre-Transitional Disks around T Tauri Stars
• Giant planet migration, disk evolution, and the origin of transitional disks
• The Last Gasp of Gas Giant Planet Formation: A Spitzer Study of the 5 Myr-old Cluster NGC 2362
• A Spitzer Census of Transitional Protoplanetary Disks with AU-Scale Inner Holes
• VLBA determination of the distance to nearby star-forming regions IV. A preliminary distance to the proto-Herbig AeBe star EC95 in the Serpens Core
• VLBA determination of the distance to nearby star-forming regions II. Hubble 4 and HDE 283572 in Taurus
• Disk Evolution in the three Nearby Star-Forming Regions of Taurus, Chamaeleon, and Ophiuchus
• The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds. XI. Lupus Observed With IRAC and MIPS
• Primordial Circumstellar Disks in Binary Systems: Evidence for Reduced Lifetimes
• The CIDA Variability Survey of Orion OB1. I: the low-mass population of Ori OB 1a and 1b
• A Study of the Luminosity and Mass Functions of the Young IC 348 Cluster using FLAMINGOS Wide-Field Near-Infrared Images
• Fitting the young main-sequence; distances, ages and age spreads
• Binarity as a key factor in protoplanetary disk evolution: Spitzer disk census of the eta Chamaeleontis cluster
• 25 Orionis: A Kinematically Distinct 10 Myr Old Group in Orion OB1a
• Debris Disks in the Upper Scorpius OB Association
• The young population of the Chamaeleon II dark cloud
• Spectroscopy of Candidate Members of the Eta Cha and MBM12 Young Associations
• Kinematics of NGC 2264: signs of cluster formation
• Optical Characterization of a New Young Stellar Population in the Serpens Molecular Cloud
• Two populations of transition discs?
• Spitzer observations of the Orion OB1 association: second generation dust disks at 5-10 Myr
• Evidence for Early Circumstellar Disk Evolution in NGC 2068/71
• Deep MIPS Observations of the IC 348 Nebula: Constraints on the Evolutionary State of Anemic Circumstellar Disks and the Primordial-to-Debris Disk Transition
• Spitzer observations of NGC2264: The nature of the disk population
• A Spectroscopic Study of Young Stellar Objects in the Serpens Cloud Core and NGC 1333
• The imprint of photoevaporation on edge-on discs
• The clearing of discs around late type T Tauri stars: constraints from the infrared two colour plane

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• Stellar Oblateness versus Distant Giants in Exciting Kepler Planet Mutual Inclinations
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• Rapid radiative clearing of protoplanetary discs
• Exoplanet atmosphere evolution: emulation with neural networks
• High-resolution [OI] line spectral mapping of TW Hya consistent with X-ray driven photoevaporation
• The general applicability of self-similar solutions for thermal disc winds
• Millimeter emission in photoevaporating disks is determined by early substructures
• Circumstellar discs: What will be next?
• Giant planet migration during the disc dispersal phase
• The fulcrum wavelength of young stellar objects -- the case of LRLL 31
• Testing photoevaporation and MHD disk wind models through future high-angular resolution radio observations: the case of TW Hydrae
• A study of accretion and disk diagnostics in the NGC 2264 cluster
• The interplay between forming planets and photo-evaporating discs I: Forbidden line diagnostics
• The interplay between forming planets and photoevaporating discs II: Wind-driven gas redistribution
• Planet formation in evolving protoplanetary discs
• The Dispersal of Planet-forming discs: Theory confronts Observations
• Modelling the secular evolution of proto-planetary disc dust sizes -- A comparison between the viscous and magnetic wind case
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