A Herschel view of protoplanetary disks in the $\sigma$ Ori cluster

Abstract

We present new Herschel PACS observations of 32 T Tauri stars in the young ($\sim$3 Myr) $\sigma$ Ori cluster. Most of our objects are K & M stars with large excesses at 24 $\mu$m. We used irradiated accretion disk models of D'Alessio et al. (2006) to compare their spectral energy distributions with our observational data. We arrive at the following six conclusions. (i) The observed disks are consistent with irradiated accretion disks systems. (ii) Most of our objects (60%) can be explained by significant dust depletion from the upper disk layers. (iii) Similarly, 61% of our objects can be modeled with large disk sizes (${\mathrm{R}}_{\mathrm{d}}\ge$ 100 AU). (iv) The masses of our disks range between 0.03 to 39 ${\mathrm{M}}_{\mathrm{Jup}}$, where 35% of our objects have disk masses lower than 1 Jupiter. Although these are lower limits, high mass ($>$ 0.05 M${}_{\odot }$) disks, which are present e.g, in Taurus, are missing. (v) By assuming a uniform distribution of objects around the brightest stars at the center of the cluster, we found that 80% of our disks are exposed to external FUV radiation of $300\le G_0\le 1000$, which can be strong enough to photoevaporate the outer edges of the closer disks. (vi) Within 0.6 pc from $\sigma$ Ori we found forbidden emission lines of [NII] in the spectrum of one of our large disk (SO662), but no emission in any of our small ones. This suggests that this object may be an example of a photoevaporating disk.

arXiv commentAccepted by the Astrophysical Journal. 37 pages, 20 figures. Section 6 presents estimations of disks masses and radii and evidence of external photoevaporation

References in corpus (74)

• Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
• A Hipparcos census of the nearby OB associations
• Circumstellar Dust Disks in Taurus-Auriga: The Submillimeter Perspective
• Evidence for a developing gap in a 10 Myr old protoplanetary disk
• Accretion Disks Around Young Objects. III. Grain Growth
• Spitzer Space Telescope study of disks in the young $\sigma$ Orionis cluster
• Photoevaporation of protoplanetary discs II: evolutionary models and observable properties
• Observations of IC348: The Disk Population at 2-3 Million Years
• Photoevaporation of Circumstellar Disks due to External FUV Radiation in Stellar Aggregates
• Ring shaped dust accumulation in transition disks
• The Disk Population of the Taurus Star-Forming Region
• Accretion in Young Stellar/Substellar Objects
• Effects of Dust Growth and Settling in T Tauri Disks
• A Survey and Analysis of Spitzer Infrared Spectrograph Spectra of T Tauri Stars in Taurus
• Accretion in Brown Dwarfs: an Infrared View
• Trapping dust particles in the outer regions of protoplanetary disks
• IRAC Observations of Taurus Pre-Main Sequence Stars
• The TW Hya Disk at 870 microns: Comparison of CO and Dust Radial Structures
• Measuring Accretion in Young Substellar Objects: Approaching the Planetary Mass Regime
• Scanamorphos: a map-making software for Herschel and similar scanning bolometer arrays
• Accretion Rates for T Tauri Stars Using Nearly Simultaneous Ultraviolet and Optical Spectra
• The Disk Population of the Upper Scorpius Association
• Spitzer observations of the Orion OB1 association: disk census in the low mass stars
• X-shooter spectroscopy of young stellar objects: I - Mass accretion rates of low-mass T Tauri stars in σOrionis
• The Photoevaporation of Discs Around Young Stars in Massive Clusters
• [O I] 6300A emission in Herbig Ae/Be systems: signature of Keplerian rotation
• A Spitzer Census of Transitional Protoplanetary Disks with AU-Scale Inner Holes
• X-Shooter spectroscopy of young stellar objects: II. Impact of chromospheric emission on accretion rate estimates
• Disk Evolution in the three Nearby Star-Forming Regions of Taurus, Chamaeleon, and Ophiuchus
• A Keck High Resolution Spectroscopic Study of the Orion Nebula Proplyds
• Evidence for Disk Photoevaporation Driven by the Central Star
• On the Outer Edges of Protoplanetary Dust Disks
• External photoevaporation of protoplanetary discs in sparse stellar groups: the impact of dust growth
• ALMA Observations of the Orion Proplyds
• Emission Lines from the Gas Disk around TW Hydra and the Origin of the Inner Hole
• Understanding the origin of the [OI] low-velocity component from T Tauri stars
• Size distribution of circumstellar disks in the Trapezium cluster
• The Structure of the Evolved Circumbinary Disk around V4046 Sgr
• X-Shooter spectroscopy of young stellar objects: V - Slow winds in T Tauri stars
• The state of protoplanetary material 10 Myr after stellar formation: circumstellar disks in the TW Hydrae association
• Proplyds and Massive Disks in the Orion Nebula Cluster Imaged with CARMA and SMA
• A break in the gas and dust surface density of the disc around the T Tauri star IM Lup
• A Submillimeter Array Survey of Protoplanetary Disks in the Orion Nebula Cluster
• Viscous Evolution and Photoevaporation of Circumstellar Disks due to External FUV Radiation Fields
• Herschel/PACS Survey of protoplanetary disks in Taurus/Auriga -- Observations of [OI] and [CII], and far infrared continuum
• Comparison of the dust and gas radial structure in the transition disk [PZ99] J160421.7-213028
• Multiple Star Formation to the Bottom of the IMF
• U-band study of the accretion properties in the sigma Ori star-forming region
• Thermal Dust Emission from Proplyds, Unresolved Disks, and Shocks in the Orion Nebula
• Spitzer Infrared Spectrograph survey of young stars in the Chamaeleon I star-forming region
• Revisiting the "radial-drift barrier" of planet formation and its relevance in observed protoplanetary discs
• The Masses of the Orion Proplyds from Submillimeter Dust Emission
• Transitional disks and their origins: an infrared spectroscopic survey of Orion A
• Spitzer Spectroscopy of Circumstellar Disks in the 5 Myr Old Upper Scorpius OB Association
• Orbital and physical properties of the $\sigma$ Ori Aa,Ab,B triple system
• Spatial distribution of stars and brown dwarfs in sigma Orionis
• Dynamical parallax of sigma Ori AB: mass, distance and age
• Characterizing the stellar photospheres and near-infrared excesses in accreting T Tauri systems
• Curved walls: Grain growth, settling, and composition patterns in T Tauri disk dust sublimation fronts
• Chronology of star formation and disk evolution in the Eagle Nebula
• Gas and dust in the TW Hydrae Association as seen by the Herschel Space Observatory
• A spectroscopic census in young stellar regions: the Sigma Orionis cluster
• Accretion properties of T Tauri stars in sigma Ori
• Probing dynamical processes in the planet forming region with dust mineralogy
• A Herschel PACS survey of the dust and gas in Upper Scorpius disks
• Discovery of a dust cloud next to sigma Orionis
• A SCUBA-2 850 micron survey of protoplanetary discs in the sigma Orionis cluster
• Low-resolution spectroscopy and spectral energy distributions of selected sources towards sigma Orionis
• Results from HOPS: A Multiwavelength Census of Orion Protostars
• The Herschel/PACS view of disks around low-mass stars in Chamaleon-I
• Discovery of an old photoevaporating disk in sigma Orionis
• External Photoevaporation of the Solar Nebula II: Effects on Disk Structure and Evolution with Non-Uniform Turbulent Viscosity due to the Magnetorotational Instability
• Sigma Orionis IRS1 A and B: A Binary Containing a Proplyd
• Accretion and outflow in the proplyd-like objects near Cygnus OB2

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• Stars and brown dwarfs in the sigma Orionis cluster. IV. IDS/INT and OSIRIS/GTC spectroscopy and Gaia DR2 astrometry
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• The Radial Distribution and Excitation of H2 around Young Stars in the HST-ULLYSES Survey
• The Evolution of Protoplanetary Disks: Probing the Inner Disk of Very Low Accretors
• A New Look at Disk Winds and External Photoevaporation in the $\sigma$-Orionis Cluster
• Lyman-alpha Scattering Models Trace Accretion and Outflow Kinematics in T Tauri Systems
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• Understanding the angular momentum evolution of T Tauri and Herbig Ae/Be stars
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