Dust Emission from the Perseus Molecular Cloud

Abstract

Using far-infrared emission maps taken by IRAS and Spitzer and a near-infrared extinction map derived from 2MASS data, we have made dust temperature and column density maps of the Perseus molecular cloud. We show that the emission from transiently heated very small grains and the big grain dust emissivity vary as a function of extinction and dust temperature, with higher dust emissivities for colder grains. This variable emissivity can not be explained by temperature gradients along the line of sight or by noise in the emission maps, but is consistent with grain growth in the higher density and lower temperature regions. By accounting for the variations in the dust emissivity and VSG emission, we are able to map the temperature and column density of a nearby molecular cloud with better accuracy than has previously been possible.

16 pages, including 9 figures. Accepted to ApJ

References in corpus (17)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Infrared Emission from Interstellar Dust. II. The Diffuse Interstellar Medium
• Infrared Emission from Interstellar Dust. I. Stochastic Heating of Small Grains
• From Molecular Cores to Planet-forming Disks: A SIRTF Legacy Program
• IRIS: A new generation of IRAS maps
• Mapping the interstellar dust with near-infrared observations: An optimized multi-band technique
• CO Isotopologues in the Perseus Molecular Cloud Complex: the X-Factor and Regional Variations
• The COMPLETE Survey of Star-Forming Regions: Phase I Data
• 2MASS wide field extinction maps - I. The Pipe nebula
• Absolute Calibration and Characterization of the Multiband Imaging Photometer for Spitzer. II. 70 micron Imaging
• Far-infrared to millimeter astrophysical dust emission I: A model based on physical properties of amorphous solids
• The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds: VI. Perseus Observed with MIPS
• Absolute Calibration and Characterization of the Multiband Imaging Photometer for Spitzer. III. An Asteroid-based Calibration of MIPS at 160 microns
• A COMPLETE Look at The Use of IRAS Emission Maps to Estimate Extinction and Dust Temperature
• The Effect of Noise in Dust Emission Maps on the Derivation of Column Density, Temperature and Emissivity Spectral Index
• Estimating Column Density in Molecular Clouds with FIR and Sub-mm Emission Maps
• Constraints on the nature of dust particles by infrared observations

Cited by in corpus (34)

• The CO-to-H2 Conversion Factor
• Planck 2013 results. XI. All-sky model of thermal dust emission
• Dust coagulation and fragmentation in molecular clouds. I. How collisions between dust aggregates alter the dust size distribution
• Planck Early Results: Thermal dust in Nearby Molecular Clouds
• The State of the Gas and the Relation Between Gas and Star Formation at Low Metallicity: the Small Magellanic Cloud
• The "True" Column Density Distribution in Star-Forming Molecular Clouds
• The Galactic Center Molecular Cloud Survey. I. A Steep Linewidth-Size Relation & Suppression of Star Formation
• Direct evidence of dust growth in L183 from MIR light scattering
• Dust variations in the diffuse interstellar medium: constraints on Milky Way dust from Planck-HFI observations
• The Physical Properties of Large-Scale Galactic Filaments
• The Structure of a Low-Metallicity Giant Molecular Cloud Complex
• Fragmentation in Molecular Clouds and its connection to the IMF
• Cosmic rays, gas and dust in nearby anticentre clouds : I -- CO-to-H2 conversion factors and dust opacities
• Evidence for dust evolution within the Taurus Complex from Spitzer images
• Parameterizing the interstellar dust temperature
• Modelling the dust emission from dense interstellar clouds: disentangling the effects of radiative transfer and dust properties
• A submillimetre survey of the kinematics of the Perseus molecular cloud: I. data
• Physical properties of the ambient medium and of dense cores in the Perseus star-forming region derived from Herschel Gould Belt Survey observations
• Characterizing the line emission from molecular clouds. Stratified random sampling of the Perseus cloud
• Grain size limits derived from 3.6 μm and 4.5 μm coreshine
• Spitzer characterisation of dust in an anomalous emission region: the Perseus cloud
• Dust Emissivity in the Star-Forming Filament OMC 2/3
• The properties of SCUBA cores in the Perseus molecular cloud: the bias of clump-finding algorithms
• Implications of a Temperature Dependent IMF I: Photometric Template Fitting
• The Relationship between CO Emission and Visual Extinction Traced by Dust Emission in the Magellanic Clouds
• The Gas Temperature of Starless Cores in Perseus
• Implications of a Temperature Dependent IMF II: An Updated View of the Star-Forming Main Sequence
• The Cosmic Microwave Background and the Stellar Initial Mass Function
• Detecting scattered light from low-mass molecular cores at 3.6 $\mu$m - Impact of global effects on the observation of coreshine
• SGR 1806-20 distance and dust properties in molecular clouds by analysis of a flare x-ray echoes
• Dependence of Chemical Abundance on the Cosmic Ray Ionization Rate in IC 348
• Contraction Signatures Toward Dense Cores in the Perseus Molecular Cloud
• Cold Water Vapor in the Barnard 5 Molecular Cloud
• Modeling Long-Wavelength Amorphous Dust Emission Based on the Physically Motivated Soft-Potential Model