IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
Accounting for the foreground contribution to the dust emission towards Kepler's supernova remnant
Autor/es:
GOMEZ, HALEY; DUNE, LORETTA; IVISON, ROB; REYNOSO, ESTELA M.; THOMPSON, MARK; SIBTHORPE, BRUCE; EALES, STEVE; DELANEY, TRACEY; MADDOX, STEVE; ISAAK, KATE
Revista:
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2009 vol. 397 p. 1621 - 1632
ISSN:
0035-8711
Resumen:
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 850ìm 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 HI, 12CO(J = 2-1) and 13CO(J = 2-1). We detect weak CO emission (peak T*A = 0.2-1K, 1-2kms-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 0.1-1.2Msolar, 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.