Thermal Dust Emission from Proplyds, Unresolved Disks, and Shocks in the Orion Nebula

Abstract

We present a new 11.7 micron mosaic image of the Orion nebula obtained with T-ReCS on Gemini South. The map includes the BN/KL region, the Trapezium, and OMC-1 South. Excluding BN/KL, we detect 91 point sources, with 27 known proplyds and over 30 ``naked'' stars showing no extended structure in HST images. Within the region we surveyed, 80 percent of known proplyds show detectable emission, almost 40 percent of naked stars are detected at 11.7 micron, and the fraction of all visible sources with IR excess emission is roughly 50 percent. Thermal dust emission from stars with no extended structure in HST images means that they have dust disks comparable to the size of our solar system. Proplyds and stars with IR excess show a clear anti-correlation in their spatial distribution, with proplyds clustered close to theta1C, and other infrared sources found farther away. We suspect that the clustered proplyds trace the youngest 0.5 Myr age group associated with the Trapezium, while the more uniformly-distributed sources trace the older 1-2 Myr population of the ONC. This suggests that small disks persist for a few Myr in irradiated environments, and hints that hierarchical sub-clustering has been important. Within 30 arcsec of theta1C, all proplyds are detected at 11.7 micron. The star theta1D is associated with the most prominent mid-IR dust arc in the nebula. We propose that this arc is the consequence of theta1D being the closest member of the Trapezium to the background cloud. Finally, we detect dust emission from HH jets in Orion, including HH202, HH529, HH513, and HH514. This is the first detection of mid-IR continuum emission from dust in the body of a collimated HH jet or bow shock.

arXiv commentaccepted by AJ. 27 pages, 11 figs, 4 color figs. If you actually want to see the figures, download this version: ftp://origins.colorado.edu/pub/nathans/smith.trecs.pdf

References in corpus (15)

• A Keck High Resolution Spectroscopic Study of the Orion Nebula Proplyds
• Viscous diffusion and photoevaporation of stellar disks
• Can photo-evaporation trigger planetesimal formation?
• A new mid-infrared map of the BN/KL region using the Keck telescope
• Deep 3.8 micron Observations of the Trapezium Cluster
• High Angular Resolution Mid-infrared Imaging of Young Stars in Orion BN/KL
• The Orion Nebula in the mid-IR
• High-resolution near-infrared imaging of the Orion 114-426 silhouette disk
• New Silhouette Disks with Reflection Nebulae and Outflows in the Orion Nebula and M43
• Grain Survival in Supernova Remnants and Herbig-Haro Objects
• The Infrared Emission of Circumstellar Envelopes, Dark Silhouettes and Photoionized Disks in HII Regions
• Thermal-IR Detection of Optical Outflow Sources in OMC1 South
• ISOCAM Molecular Hydrogen Images of the Cep E Outflow
• Polarization Profiles of Scattered Emission Lines. II. Upstream Dust Scattering in the HH 1 Jet
• Discovery of a candidate protoplanetary disk around the embedded source IRc9 in Orion

Cited by in corpus (47)

• The stellar association around Gamma Velorum and its relationship with Vela OB2
• Variations in Stellar Clustering with Environment: Dispersed Star Formation and the Origin of Faint Fuzzies
• SPITZER/IRAC-MIPS Survey of NGC2244: Protostellar Disk Survival in the Vicinity of Hot Stars
• Hierarchical Star Formation in the Spiral Galaxy NGC 628
• Properties of the ionized gas in HH202. II: Results from echelle spectrophotometry with UVES
• A Disk-Wind Model for the Near-Infrared Excess Emission in Protostars
• Proplyds and Massive Disks in the Orion Nebula Cluster Imaged with CARMA and SMA
• X-ray properties of protostars in the Orion Nebula
• Orion KL: The hot core that is not a "Hot Core"
• The three dimensional dynamic structure of the inner Orion Nebula
• A Multi-Color Optical Survey of the Orion Nebula Cluster. Part I: the Catalog
• The VLTI/MIDI survey of massive young stellar objects - Sounding the inner regions around intermediate- and high-mass young stars using mid-infrared interferometry
• The Orion HII Region and the Orion Bar in the Mid-Infrared
• The Ring Nebula Around the Blue Supergiant SBW1: Pre-Explosion Snapshot of a SN 1987A Twin
• JWST Observations of Young protoStars (JOYS): overview of program and early results
• An Improved HR Diagram for the Orion Trapezium Cluster
• The Orion Protostellar Explosion and Runaway Stars Revisited: Stellar Masses, Disk Retention, and an Outflow from BN
• OH maser disc and outflow in the Orion-BN/KL region
• A Herschel view of protoplanetary disks in the $\sigma$ Ori cluster
• New Evidence for the Dynamical Decay of a Multiple System in the Orion Kleinmann-Low Nebula
• Properties of protostars in the Elephant Trunk globule IC 1396A
• Bondi-Hoyle-Lyttleton Accretion onto a Protoplanetary Disk
• Cloud fragmentation and proplyd-like features in HII regions imaged by HST
• Chemical abundances in the protoplanetary disk LV2 (Orion): clues to the causes of the abundance anomaly in HII regions
• Photoionized Herbig-Haro objects in the Orion Nebula through deep high-spectral resolution spectroscopy I: HH529II and III
• Spitzer/MIPS 24 micron Detection of Photoevaporating Protoplanetary Disks
• Ionized gas diagnostics from protoplanetary discs in the Orion Nebula and the abundance discrepancy problem
• Massive star formation and feedback in W49A: The source of our Galaxy's most luminous water maser outflow
• Multi-Conjugate Adaptive Optics images of the Trapezium Cluster
• Silicate Emission Profiles from Low-Mass Protostellar Disks in the Orion Nebula: Evidence for Growth and Thermal Processing of Grains
• Photoionized Herbig-Haro objects in the Orion Nebula through deep high-spectral resolution spectroscopy III: HH514
• Gas-phase Fe/O and Fe/N abundances in Star-Forming Regions. Relations between nucleosynthesis, metallicity and dust
• Bow shocks, bow waves, and dust waves. II. Beyond the rip point
• Bow shocks, bow waves, and dust waves. III. Diagnostics
• A photoionized Herbig-Haro object in the Orion nebula
• Raman mapping of photodissociation regions
• Sigma Orionis IRS1 A and B: A Binary Containing a Proplyd
• True versus apparent shapes of bow shocks
• A VLA Survey For Faint Compact Radio Sources in the Orion Nebula Cluster
• The NEMESIS Catalogue of Young Stellar Objects for the Orion Star Formation Complex. I. General description of data curation
• First Science Observations with SOFIA/FORCAST: 6 to 37 micron Imaging of the Central Orion Nebula
• The Dusty Silhouette Jet HH 1019 in the Carina Nebula
• The Intricate Structure of HH 508, the Brightest Microjet in the Orion Nebula
• The Return of the Proplyds - Understanding the Dynamics of Ionization Triggered Stars
• Using simultaneous mass accretion and external photoevaporation rates for d203-504 to constrain disc evolution processes
• The curious morphology and orientation of Orion proplyd HST-10
• Dispersal of protoplanetary discs: How stellar properties and the local environment determine the pathway of evolution