2009/05/28 by Hidehiro Kaneda, H. Kaneda, Mitsuyoshi Yamagishi +5 · 30 citations
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Star Formation Studies #Brightness #Cosmic dust #Extinction (optical mineralogy) #Far infrared #Galactic halo #Galaxies: Formation, Evolution, Phenomena #Galaxy #Halo #Infrared #Optics #Outflow #Physics #Surface brightness #astro-ph.GA
paper · pdf · doi:10.1088/0004-637x/698/2/l125
published in The Astrophysical Journal 698(2), L125-L128 (IOP Publishing) · 4 pages, 3 figures, accepted for publication in the ApJL
arxiv created 2009/05/28 · openalex publication_date 2009/06/01 · arxiv updated 2011/02/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We present new far-infrared (FIR) images of the edge-on starburst galaxy NGC 253 obtained with the Far-Infrared Surveyor (FIS) onboard AKARI at wavelengths of 90 μm and 140 μm. We have clearly detected FIR dust emission extended in the halo of the galaxy; there are two filamentary emission structures extending from the galactic disk up to 9 kpc in the northern and 6 kpc in the northwestern direction. From its spatial coincidence with the X-ray plasma outflow, the extended FIR emission is very likely to represent outflowing dust entrained by superwinds. The ratios of surface brightness at 90 μm to that at 140 μm suggest that the temperatures of the dust in the halo are getting higher in the regions far from the disk, implying that there exist extra dust heating sources in the halo of the galaxy.