AKARI and BLAST Observations of the Cassiopeia A Supernova Remnant and Surrounding Interstellar Medium
B. Sibthorpe
(1)
,
Peter A. Ade
(2)
,
James J. Bock
(3)
,
E. L. Chapin
(4)
,
Mark J. Devlin
(5)
,
Simon R. Dicker
(5)
,
Matthew J. Griffin
(2)
,
Joshua O. Gundersen
(6)
,
Mark Halpern
(4)
,
Peter C. Hargrave
(2)
,
David H. Hughes
(7)
,
Woong-Seob Jeong
(8)
,
Hidehiro Kaneda
(9)
,
J. Klein
(5)
,
B.-C. Koo
(10)
,
H.-G. Lee
(10)
,
Gaelen Marsden
(4)
,
Peter G. Martin
(11)
,
Philip Mauskopf
(2)
,
Dae-Sik Moon
(12)
,
Calvin B. Netterfield
(12)
,
Luca Olmi
(13)
,
E. Pascale
(2)
,
Guillaume Patanchon
(14)
,
M. Rex
(5)
,
Arabindo Roy
(12)
,
Douglas Scott
(4)
,
Christopher Semisch
(5)
,
Matthew D. P. Truch
(5)
,
Carol E. Tucker
(2)
,
Gregory S. Tucker
(15)
,
Marco P. Viero
(12)
,
Donald V. Wiebe
(4)
1
UKATC -
UK Astronomy Technology Centre, Royal Observatory Edinburgh
2 Cardiff University
3 JPL - Jet Propulsion Laboratory
4 UBC - University of British Columbia [Canada]
5 Department of Physics and Astronomy, University of Pennsylvania
6 Department of Physics, University of Miami
7 INAOE - Instituto Nacional de Astrofísica, Óptica y Electrónica
8 Korea Astronomy and Space Science Institute (KASI)
9 Department of Astrophysics, Nagoya University
10 Department of Physics and Astronomy, Seoul National University
11 CITA - Canadian Institute for Theoretical Astrophysics
12 Department of Astronomy and Astrophysics, University of Toronto
13 Istituto di Radioastronomia, Firenze
14 APC (UMR_7164) - AstroParticule et Cosmologie
15 Department of Physics, Brown University
2 Cardiff University
3 JPL - Jet Propulsion Laboratory
4 UBC - University of British Columbia [Canada]
5 Department of Physics and Astronomy, University of Pennsylvania
6 Department of Physics, University of Miami
7 INAOE - Instituto Nacional de Astrofísica, Óptica y Electrónica
8 Korea Astronomy and Space Science Institute (KASI)
9 Department of Astrophysics, Nagoya University
10 Department of Physics and Astronomy, Seoul National University
11 CITA - Canadian Institute for Theoretical Astrophysics
12 Department of Astronomy and Astrophysics, University of Toronto
13 Istituto di Radioastronomia, Firenze
14 APC (UMR_7164) - AstroParticule et Cosmologie
15 Department of Physics, Brown University
Guillaume Patanchon
- Fonction : Auteur
- PersonId : 1452095
- ORCID : 0000-0002-9035-849X
- IdRef : 089431987
Résumé
We use new large area far infrared maps ranging from 65 to 500 mum obtained with the AKARI and the Balloon-borne Large Aperture Submillimeter Telescope missions to characterize the dust emission toward the Cassiopeia A supernova remnant (SNR). Using the AKARI high-resolution data we find a new "tepid" dust grain population at a temperature of ~35 K and with an estimated mass of 0.06 M sun. This component is confined to the central area of the SNR and may represent newly formed dust in the unshocked supernova ejecta. While the mass of tepid dust that we measure is insufficient by itself to account for the dust observed at high redshift, it does constitute an additional dust population to contribute to those previously reported. We fit our maps at 65, 90, 140, 250, 350, and 500 mum to obtain maps of the column density and temperature of "cold" dust (near 16 K) distributed throughout the region. The large column density of cold dust associated with clouds seen in molecular emission extends continuously from the surrounding interstellar medium to project on the SNR, where the foreground component of the clouds is also detectable through optical, X-ray, and molecular extinction. At the resolution available here, there is no morphological signature to isolate any cold dust associated only with the SNR from this confusing interstellar emission. Our fit also recovers the previously detected "hot" dust in the remnant, with characteristic temperature 100 K.