SIMBAD references

2014A&A...566A..45L - Astronomy and Astrophysics, volume 566A, 45-45 (2014/6-1)

Herschel-Planck dust optical-depth and column-density maps. I. Method description and results for Orion.


Abstract (from CDS):

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 dust-emission maps and constitute the highest dynamic range column-density maps ever constructed for the entire Orion complex, covering 0.01mag<AK<30mag, or 2x1020cm–2<N<5x1023cm–2. We determined the ratio of the 2.2µm extinction coefficient 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 probability distribution function, 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 Σ* follows a simple law Σ*∝Σgasβ, with β∼2.

Abstract Copyright:

Journal keyword(s): ISM: clouds - dust, extinction - ISM: structure - ISM: individual objects: Orion molecular cloud

VizieR on-line data: <Available at CDS (J/A+A/566/A45): list.dat planck_herschel.fits>

Errata: + corrigendum vol. 568, p. C1

Simbad objects: 35

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