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Accounting for the foreground contribution to the dust emission towards Kepler's supernova remnant

Gomez, Haley Louise ORCID:, Dunne, L., Ivison, R. J., Reynoso, E. M., Thompson, M. A., Sibthorpe, B., Eales, Stephen Anthony ORCID:, DeLaney, T. M., Maddox, S. and Isaak, Kate G. 2009. Accounting for the foreground contribution to the dust emission towards Kepler's supernova remnant. Monthly Notices of the Royal Astronomical Society 397 (3) , pp. 1621-1632. 10.1111/j.1365-2966.2009.15061.x

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Whether or not supernovae contribute significantly to the overall dust budget is a controversial subject. Submillimetre (sub-mm) observations, sensitive to cold dust, have shown an excess at 450 and 850 μm in young remnants Cassiopeia A (Cas A) and Kepler. Some of the sub-mm emission from Cas A has been shown to be contaminated by unrelated material along the line of sight. In this paper, we explore the emission from material towards Kepler using sub-mm continuum imaging and spectroscopic observations of atomic and molecular gas, via H i, 12CO(J= 2–1) and 13CO(J= 2–1). We detect weak CO emission (peak T*A= 0.2–1 K, 1–2 km s−1 full width at half-maximum) from diffuse, optically thin gas at the locations of some of the sub-mm clumps. The contribution to the sub-mm emission from foreground molecular and atomic clouds is negligible. The revised dust mass for Kepler's remnant is 0.1–1.2 M⊙, about half of the quoted values in the original study by Morgan et al., but still sufficient to explain the origin of dust at high redshifts.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: Supernovae: Kepler; ISM: submillimetre dust; radio lines: ISM; Galaxies: abundances; submillimetre
Publisher: Blackwell
ISSN: 0035-8711
Last Modified: 17 Oct 2022 10:11

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