A COOL DUST FACTORY IN THE CRAB NEBULA: A HERSCHEL STUDY OF THE FILAMENTS

By H. Gomez, O. Krause, M. Barlow, B. Swinyard, P. Owen, C. Clark, M. Matsuura, E. Gomez, J. Rho, M.-A. Besel and 6 more. 2012

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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+0.32− 0.08 M☉ for T = 28.1+5.5− 3.2 K. Amorphous carbon grains require 0.11 ± 0.01 M☉ of dust with T = 33.8+2.3− 1.8 K. A single temperature modified blackbody with 0.14 M☉ and 0.08 M☉ 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.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/4f860227df10bc848599db2b9ae70fb7a6124f42

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Citations in the corpus

DUST PRODUCTION AND PARTICLE ACCELERATION IN SUPERNOVA 1987A REVEALED WITH ALMA (2013, background): “(Cassiopeia A, Barlow et al. 2010; Crab Nebula, Gomez et al. 2012).”
Detection of the Far-infrared [O iii] and Dust Emission in a Galaxy at Redshift 8.312: Early Metal Enrichment in the Heart of the Reionization Era (2018, background): “…young SN remnants (SNRs), which could explain the high dust yield (e.g., Dunne et al. 2003, 2009; Barlow et al. 2010; Matsuura et al. 2011, 2015; Gomez et al. 2012; Temim & Dwek 2013; Indebetouw et al. 2014; De Looze et al. 2017), although the other SNRs typically have much smaller dust masses…”