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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Barlow, Mj
University College London
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2021The impact of metallicity-dependent dust destruction on the dust-to-metals ratio in galaxies
- 2019The dust content of the Crab Nebula
- 2015A stubbornly large mass of cold dust in the ejecta of Supernova 1987Acitations
- 2015The dust and gas content of the Crab Nebulacitations
- 2012A Cool Dust Factory in the Crab Nebula: A Herschel Study of the Filamentscitations
- 2007Dust yields in clumpy supernova shells: SN 1987A revisitedcitations
- 2006The Spatial Distribution of Grains Around the Dual Chemistry Post-AGB Star Roberts 22
- 2003Three-dimensional photoionization modelling of the hydrogen-deficient knots in the planetary nebula Abell 30citations
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article
A Cool Dust Factory in the Crab Nebula: A Herschel Study of the Filaments
Abstract
Whether supernovae are major sources of dust in galaxies is a long-standing debate. We present infrared and submillimeter photometry and spectroscopy from the Herschel Space Observatory of the Crab Nebula between 51 and 670 μm as part of the Mass Loss from Evolved StarS program. We compare the emission detected with Herschel with multiwavelength data including millimeter, radio, mid-infrared, and archive optical images. We carefully remove the synchrotron component using the Herschel and Planck fluxes measured in the same epoch. The contribution from line emission is removed using Herschel spectroscopy combined with Infrared Space Observatory archive data. Several forbidden lines of carbon, oxygen, and nitrogen are detected where multiple velocity components are resolved, deduced to be from the nitrogen-depleted, carbon-rich ejecta. No spectral lines are detected in the SPIRE wavebands; in the PACS bands, the line contribution is 5% and 10% at 70 and 100 μm and negligible at 160 μm. After subtracting the synchrotron and line emission, the remaining far-infrared continuum can be fit with two dust components. Assuming standard interstellar silicates, the mass of the cooler component is 0.24<SUP>+0.32</SUP> <SUB>- 0.08</SUB> M <SUB>☉</SUB> for T = 28.1<SUP>+5.5</SUP> <SUB>- 3.2</SUB> K. Amorphous carbon grains require 0.11 ± 0.01 M <SUB>☉</SUB> of dust with T = 33.8<SUP>+2.3</SUP> <SUB>- 1.8</SUB> K. A single temperature modified blackbody with 0.14 M <SUB>☉</SUB> and 0.08 M <SUB>☉</SUB> for silicate and carbon dust, respectively, provides an adequate fit to the far-infrared region of the spectral energy distribution but is a poor fit at 24-500 μm. The Crab Nebula has condensed most of the relevant refractory elements into dust, suggesting the formation of dust in core-collapse supernova ejecta is efficient.Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.