Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-12-04
Astronomy and Astrophysics
Astrophysics
16 pages, 32 figures, accepted for publication in Astronomy & Astrophysics
Scientific paper
10.1051/0004-6361:20011613
The ISOPHOT instrument aboard ISO has been used to observe extended FIR emission of six Abell clusters. The raw profiles of the I_(120 um) / I_(180 um) surface brightness ratio including zodiacal light show a bump towards Abell 1656 (Coma), dips towards Abell 262 and Abell 2670, and are without clear structure towards Abell 400, Abell 496, and Abell 4038. After subtraction of the zodiacal light, the bump towards Abell 1656 is still present, while the dips towards Abell 262 and Abell 2670 are no longer noticable. This indicates a localized excess of emitting material outside the Galaxy towards Abell 1656, while the behavior in Abell 262 and Abell 2670 can be reconciled with galactic cirrus structures localized on the line-of-sight to these clusters. The excess towards Abell 1656 (Coma) is interpreted as thermal emission from intracluster dust distributed in the hot X-ray emitting intracluster medium. The absence of any signature for intracluster dust in five clusters and the rather low inferred dust mass in Abell 1656 indicates that intracluster dust is likely not responsible for the excess X-ray absorption seen in cooling flow clusters. These observations thereby represent a further unsuccessful attempt in detecting the presumed final stage of the cooling flow material, in accord with quite a number of previous studies in other wavelengths regions. Finally, the observed dimming of the high-redshift supernovae is unlikely be attributable to extinction caused by dust in the intracluster or even a presumed intercluster medium.
Klaas Ulrich
Lemke Deitrich
Mattila Kalevi
Stickel Manfred
No associations
LandOfFree
Far-Infrared Emission from Intracluster Dust in Abell Clusters does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Far-Infrared Emission from Intracluster Dust in Abell Clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Far-Infrared Emission from Intracluster Dust in Abell Clusters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-478780