The first detection of Far-Infrared emission associated with an extended
  HI disk. The case of NGC 891

Alton; Alton; Broeils; C. C. Popescu; Cuillandre; Davies; Davies; Dettmar; Draine; Dupac; Ferrara; García-Burillo; Guélin; Kessler; Kylafis; Laor; Larson; Lemke; Maller; Misiriotis; Pei; Pohlen; Popescu; Popescu; Popescu; R. J. Tuffs; Radovich; Rand; Sancisi; Swaters; Tinsley; Trewhella; Tuffs; Tuffs; van der Hulst; van der Kruit; Xilouris; Xilouris; Zaritsky

research

The first detection of Far-Infrared emission associated with an extended HI disk. The case of NGC 891

Authors: Alton
Alton
Broeils
C. C. Popescu
Cuillandre
Davies
Davies
Dettmar
Draine
Dupac
Ferrara
García-Burillo
Guélin
Kessler
Kylafis
Laor
Larson
Lemke
Maller
Misiriotis
Pei
Pohlen
Popescu
Popescu
Popescu
R. J. Tuffs
Radovich
Rand
Sancisi
Swaters
Tinsley
Trewhella
Tuffs
Tuffs
van der Hulst
van der Kruit
Xilouris
Xilouris
Zaritsky
Publication date: 1 January 2003
Publisher: 'EDP Sciences'
Doi

Abstract

Spiral galaxies in the Local Universe are commonly observed to be embedded in extended disks of neutral hydrogen - the so called ``extended HI disks''. Based on observations made using the ISOPHOT instrument on board the Infrared Space Observatory, we report the first detection of cold dust in the extended HI disk of a spiral galaxy. The detection was achieved through a dedicated deep Far-Infrared observation of a large field encompassing the entire HI disk of the edge-on spiral galaxy NGC 891. Our discovery indicates that the extended HI disk of NGC 891 is not primordial in origin.Comment: accepted for publication in Astronomy and Astrophysics Letter