2MASX J00482185-2507365 occulting pair

The pair as photographed by Hubble Space Telescope.

The 2MASX J00482185-2507365 occulting pair is a pair of overlapping spiral galaxies found in the vicinity of NGC 253, the Sculptor Galaxy. Both galaxies are more distant than NGC 253, with the background galaxy, 2MASX J00482185-2507365 (PGC 198187), lying at redshift z=0.06, and the foreground galaxy lying between NGC 253 and the background galaxy (0.0008 < z < 0.06).[1]

This pair of galaxies illuminates the distribution of galactic dust beyond the visible arms of a spiral galaxy. The heretofore unexpected extent of dust beyond the starry limits of the arms shows new areas for extragalactic astronomical study. The dusty arms extend 6 times the radii of the starry arms of the galaxy, and are shown silhouetted in HST images against the central and core sections of the background galaxy.[2]

See also

References

  1. ↑ arXiv:0810.2646v1 ; An extended dust disk in a spiral galaxy; An occulting galaxy pair in ANGST ; Bibcode: 2008arXiv0810.2646H ; B. W. Holwerda, W. C. Keel, B. Williams, J. J. Dalcanton, R. S. de Jong ; 15 Oct 2008'
  2. ↑ Astronomy; Galaxy's Dark Secret Exposed ; Daniel Pendick ; pp.20 Vol.37 Issue.1 January 2009 ;

External links


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