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Accounting for the foreground contribution to the dust emission towards Kepler's supernova remnant.
- Source :
-
Monthly Notices of the Royal Astronomical Society . Aug2009, Vol. 397 Issue 3, p1621-1632. 12p. 1 Color Photograph, 2 Black and White Photographs, 3 Charts, 8 Graphs. - Publication Year :
- 2009
-
Abstract
- 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 = 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 , 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00358711
- Volume :
- 397
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Publication Type :
- Academic Journal
- Accession number :
- 43460133
- Full Text :
- https://doi.org/10.1111/j.1365-2966.2009.15061.x