Toward a better understanding of the mid-infrared emission in the LMC
arXiv:2304.09519 · doi:10.1051/0004-6361/202245107
Abstract
In this paper we aim to constrain for the first time the dust emission in the mid-to-far infrared domain, in the LMC, with the use of the Spitzer IRS and MIPS SED data, combined with Herschel data. We also consider UV extinction predictions derived from modeling. We selected 10 regions observed as part of the SAGE-Spec program, to probe dust properties in various environments (diffuse, molecular and ionized regions). All data were smoothed to the 40arcsec angular resolution. The SEDs were modeled with DustEM models, using the standard Mathis RF, as well as three additional RFs, with stellar clusters ages ranging from 4 Myr to 600 Myr. Standard dust models used to reproduce the Galactic diffuse medium are clearly not able to reproduce the dust emission in the MIR wavelength domain. This analysis evidences the need of adjusting parameters describing the dust size distribution and shows a clear distinct behavior according to the type of environments. In addition, whereas the small grain emission always seems to be negligible at long wavelengths in our Galaxy, the contribution of this small dust component could be more important than expected, in the submm-mm range, in the LMC averaged SED. Properties of the small dust component of the LMC are clearly different from those of our Galaxy. Its abundance, significantly enhanced, could be the result of large grains shattering due to strong shocks or turbulence. In addition, this grain component in the LMC systematically shows smaller grain size in the ionized regions compared to the diffuse medium. Predictions of extinction curves show significantly distinct behaviors depending on the dust models but also from one region to another. Comparison of model predictions with the LMC mean extinction curve shows that no model gives satisfactory agreement using the Mathis radiation field while using a harder radiation field tends to improve the agreement
arXiv commentAccepted for publication in A&A
References in corpus (61)
- The Infrared Array Camera (IRAC) for the Spitzer Space Telescope
- Infrared Emission from Interstellar Dust. IV. The Silicate-Graphite-PAH Model in the Post-Spitzer Era
- A Quantitative Comparison of SMC, LMC, and Milky Way UV to NIR Extinction Curves
- Planck 2013 results. XI. All-sky model of thermal dust emission
- Spitzer Survey of the Large Magellanic Cloud, Surveying the Agents of a Galaxy's Evolution (SAGE) I: Overview and Initial Results
- An Analysis of the Shapes of Interstellar Extinction Curves. V. The IR-Through-UV Curve Morphology
- Infrared Emission from Interstellar Dust. I. Stochastic Heating of Small Grains
- The CO-to-H2 Conversion Factor From Infrared Dust Emission Across the Local Group
- IRIS: A new generation of IRAS maps
- A Robotic Wide-Angle H-Alpha Survey of the Southern Sky
- The evolution of amorphous hydrocarbons in the ISM: dust modelling from a new vantage point
- The global dust SED: Tracing the nature and evolution of dust with DustEM
- Reduction Algorithms for the Multiband Imaging Photometer for Spitzer
- The Second Survey of the Molecular Clouds in the Large Magellanic Cloud by NANTEN. II. Star Formation
- Herschel Far-Infrared and Sub-millimeter Photometry for the KINGFISH Sample of Nearby Galaxies
- The Magellanic Mopra Assessment (MAGMA). I. The Molecular Cloud Population of the Large Magellanic Cloud
- A New Look at the Large-Scale HI Structure of the LMC
- Spectral Mapping Reconstruction of Extended Sources
- Non-Standard Grain Properties, Dark Gas Reservoir, and Extended Submillimeter Excess, Probed by Herschel in the Large Magellanic Cloud
- Towards a free-free template for CMB foregrounds
- Planck intermediate results. XVII. Emission of dust in the diffuse interstellar medium from the far-infrared to microwave frequencies
- The Herschel-PACS photometer calibration: Point-source flux calibration for scan maps
- Linking dust emission to fundamental properties in galaxies: The low-metallicity picture
- Far-infrared to millimeter astrophysical dust emission I: A model based on physical properties of amorphous solids
- Mapping the cold dust temperatures and masses of nearby Kingfish galaxies with Herschel
- The Astrodust+PAH Model: A Unified Description of the Extinction, Emission, and Polarization from Dust in the Diffuse Interstellar Medium
- Planck Early Results: Origin of the submm excess dust emission in the Magellanic Clouds
- The Dust Budget of the SMC: Are AGB Stars the Primary Dust Source at Low Metallicity?
- Dust and Gas in the Magellanic Clouds from the HERITAGE Herschel Key Project. II. Gas-to-Dust Ratio Variations across ISM Phases
- Submillimeter to centimeter excess emission from the Magellanic Clouds. II. On the nature of the excess
- Herschel Inventory of The Agents of Galaxy Evolution (HERITAGE): the Large Magellanic Cloud dust
- Milky Way Mid-Infrared Spitzer Spectroscopic Extinction Curves: Continuum and Silicate Features
- The SAGE-Spec Spitzer Legacy program: The life-cycle of dust and gas in the Large Magellanic Cloud
- Modeling Thermal Dust Emission with Two Components: Application to the Planck HFI Maps
- Cold and Warm Atomic Gas around the Perseus Molecular Cloud. II. The Impact of High Optical Depth on the HI Column Density Distribution and Its Implication for the HI-to-H2 Transition
- Planck intermediate results. XIV. Dust emission at millimetre wavelengths in the Galactic plane
- The Polycyclic Aromatic Hydrocarbon Mass Fraction on a 10 pc scale in the Magellanic Clouds
- The impact of stellar feedback on the density and velocity structure of the interstellar medium
- Multi-wavelength analysis of the dust emission in the Small Magellanic Cloud
- Far-Infrared to Millimeter Astrophysical Dust Emission. II: Comparison of the Two-Level Systems (TLS) model with Astronomical Data
- Spatial variations of dust abundances across the Large Magellanic Cloud
- Abundant molecular gas in the intergalactic medium of Stephan's Quintet
- Modeling dust emission in the Magellanic Clouds with Spitzer and Herschel
- On the Observed Diversity of Star Formation Efficiencies in Giant Molecular Clouds
- Spitzer characterisation of dust in an anomalous emission region: the Perseus cloud
- Dust Abundance Variations in the Magellanic Clouds: Probing the Lifecycle of Metals with All-Sky Surveys
- The thermal dust emission in the N158-N159-N160 (LMC) star forming complex mapped by Spitzer, Herschel and LABOCA
- Detection and characterization of a 500 mic dust emissivity excess in the Galactic Plane using Herschel/Hi-GAL observations
- Herschel and SCUBA-2 observations of dust emission in a sample of Planck cold clumps
- Spitzer Characterization of Dust in the Ionized Medium of the Large Magellanic Cloud
- Mapping Spatial Variations of HI Turbulent Properties in the Small and Large Magellanic Cloud
- Shattering by turbulence as a production source of very small grains
- Physical Conditions, Grain Temperatures, and Enhanced Very Small Grains in the Barnard Loop
- Absolute Calibration and Characterization of the Multiband Imaging Photometer for Spitzer: IV. The Spectral Energy Distribution Mode
- Benchmarking Dust Emission Models in M101
- Dark dust II: Properties in the general field of the diffuse ISM
- Herschel spectroscopy of Massive Young Stellar Objects in the Magellanic Clouds
- Spitzer Observations of Dust Emission from HII Regions in the Large Magellanic Cloud
- Modeling and predicting the shape of the far-infrared to submillimeter emission in ultra-compact HII regions and cold clumps
- Thermal emission from the amorphous dust: An alternative possibility of the origin of the anomalous microwave emission
- Revisiting the dust properties in the molecular clouds of the Large Magellanic Cloud