zone of avoidance
(ZOA, zone of few nebulae)
(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 (extinction), such as other galaxies.
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 lack of galaxies in the region of the sky was first
pointed out in 1869 by astronomer Richard Proctor who
termed it the zone of few nebulae.
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.
(Milky Way,sky)
Further reading:
https://en.wikipedia.org/wiki/Zone_of_Avoidance
https://ui.adsabs.harvard.edu/abs/1994A%26A...286...17S/abstract
https://ned.ipac.caltech.edu/level5/Sept04/Hubble/Hubble1_8.html
https://ui.adsabs.harvard.edu/abs/2000A%26ARv..10..211K/abstract
https://ui.adsabs.harvard.edu/abs/1869MNRAS..29..337P/abstract
Prefix | Example | | |
ZOAG | ZOAG G135.74-04.53 | | |
|
Referenced by pages:
Anticenter Shell
Dwingeloo Obscured Galaxy Survey (DOGS)
Great Attractor
Local Group (LG)
Parkes HI Zone of Avoidance Survey (HIZOA)
rare designator prefixes
zone
Index