Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...18511907c&link_type=abstract
American Astronomical Society, 185th AAS Meeting, #119.07; Bulletin of the American Astronomical Society, Vol. 26, p.1517
Astronomy and Astrophysics
Astronomy
Scientific paper
Ultradeep imaging (to V ~ 28) with the ESO 3.5 m NTT has shown that the two brightest galaxies (V ~ 18) in a 7.6 arcmin field at high galactic latitude are surrounded by ``dark haloes'' of diameter ~ 180h(-1) kpc. These dark haloes appear to be regions in which the background light from beyond the galaxies has been reduced by obscuration. Thus we appear to be seeing the shadows of the haloes of these galaxies. The size of the effect is not large, being a reduction in the total background (i.e. including the local sky background) of only ~ 0.06%. Both galaxies appear to be ellipticals at the same redshift z = 0.191, separated on the sky by ~ 400h(-1) kpc. Dusty haloes of similar size, diameter ~ 90h(-1) kpc, have recently been reported by Zaritsky (1994), from the reddening of background galaxies.
Campusano Luis E.
Clowes Roger G.
Melnick Jorge
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