zone of avoidance
(region of sky obscured by Milky Way)
The zone of avoidance (ZOA)
is the region of the sky within the visible Milky Way,
in which the galaxy's dust obscures more distant
objects such as other galaxies (extinction).
Some surveys aim at investigating objects hidden
by the ZOA through observation using portions of the electromagnetic radiation
spectrum that are unaffected by dust, such as radio.
The terms northern zone of avoidance and southern zone of avoidance
have been used to indicate roughly the portions of the ZOA
with positive and negative declinations, respectively,
i.e., north and south of Earth's equator.
The designator ZOAG (for "ZOA galaxy") stems from a 1990s
21-cm line survey to identify galaxies obscured by the Milky
Way, within or near the Perseus-Pisces Supercluster.
|Prefix||Example|| || |
|ZOAG||ZOAG G135.74-04.53|| || |
Referenced by pages:
Dwingeloo Obscured Galaxy Survey (DOGS)
Parkes HI Zone of Avoidance Survey (HIZOA)