Herschel-Planck dust optical-depth and column-density maps - I. Method description and results for Orion
By Marco Lombardi, H. Bouy, Joao F. Alves, C. Lada. 2014
144 citations recorded by the source corpus.
We present high-resolution, high dynamic range column-density and color-temperature maps of the Orion complex using a combination of Planck dust-emission maps, Herschel dust-emission maps, and 2MASS NIR dust-extinction maps. The column-density maps combine the robustness of the 2MASS NIR extinction maps with the resolution and coverage of the Herschel and Planck dustemission maps and constitute the highest dynamic range column-density maps ever constructed for the entire Orion complex, covering 0:01 mag < AK < 30 mag, or 2 10 20 cm 2 < N < 5 10 23 cm 2 . We determined the ratio of the 2:2µm extinction coe cient to the 850µm opacity and found that the values obtained for both Orion A and B are significantly lower than the predictions of standard dust models, but agree with newer models that incorporate icy silicate-graphite conglomerates for the grain population. We show that the cloud projected pdf, over a large range of column densities, can be well fitted by a simple power law. Moreover, we considered the local Schmidt-law for star formation, and confirm earlier results, showing that the protostar surface density follows a simple law / gas, with 2.
Subfields: Astronomy and Astrophysics, Fluid Flow and Transfer Processes
View Paper: https://www.semanticscholar.org/paper/2421984a682b39b5ba17bea9b993ac9e9bdd9e68
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Citations in the corpus
- Evolution of Interstellar Medium, Star Formation, and Accretion at High Redshift (2017, methodology): “Figures 2 and 7 in Lombardi et al. (2014) clearly show that these areas of peak dust temperature are confined to the immediate vicinity of the two OB star formation regions (∼ 2 arcmin in size) while the bulk of the GMCs, extending over 6 and 4◦ at λ > 200µm, is at TD = 14 − 20 K.”
- An ALMA study of the Orion Integral Filament: I. Evidence for narrow fibers in a massive cloud (2018, background): “Figure 7 illustrates a point-to-point comparison of the total N(H2) column density derived in previous Herschel-Planck studies (θFWHM = 36′′; Lombardi et al. 2014) with similar single-dish N2H+ integrated intensity maps (θFWHM = 30′′; Hacar et al. 2017a), normalized by the corresponding gas kinetic…”
- A Herschel/PACS Far-infrared Line Emission Survey of Local Luminous Infrared Galaxies (2017, methodology): “On the other hand, Lombardi et al. (2014) presented column density and effective dust temperature maps based on NIR, Herschel and Planck data for the entire Orion complex at a lower angular resolution than Goicoechea et al. (2015).”