2MASX J00482185-2507365 occulting pair

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2MASX J00482185-2507365
2MASX J00482185-2507365 by HST.jpg
The pair as photographed by the Hubble Space Telescope
Observation data (J2000 epoch)
Constellation Sculptor
Right ascension 00h 48m 21.859s [1]
Declination −25° 07′ 36.53″[1]
Redshift 0.064011[2]
Helio radial velocity 19190 km/s[2]
Apparent magnitude (V) 16.5[2]
Characteristics
Apparent size (V) 0.447' x 0.286'[3]
Other designations
2MASX J00482185-2507365, PGC 198197, 6dFGS gJ004821.8-250737[2]
See also: Galaxy, List of galaxies

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, about 800 million light-years from Earth, and the foreground galaxy lying between NGC 253 and the background galaxy (0.0008 < z < 0.06).[4]

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.[5]

See also[edit]

References[edit]

  1. ^ a b Skrutskie, M. (2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708. 
  2. ^ a b c d "NED results for object PGC 198197". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 13 December 2016. 
  3. ^ "2MASX J00482185-2507365". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 December 2016. 
  4. ^ arXiv:0810.2646v1 ; An extended dust disk in a spiral galaxy; An occulting galaxy pair in ANGST ; Bibcode2008arXiv0810.2646H ; B. W. Holwerda, W. C. Keel, B. Williams, J. J. Dalcanton, R. S. de Jong ; 15 Oct 2008'
  5. ^ Astronomy; Galaxy's Dark Secret Exposed ; Daniel Pendick ; pp.20 Vol.37 Issue.1 January 2009 ;

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