New radio imaging technique lets us see right through Milky Way'sdisk, at galaxies on the other side!

On 11/02/2016 4:20 PM, Steve Willner wrote:
The survey used the 21 cm line of neutral hydrogen and detected 889
galaxies. Observations finished in year 2000, and it's surprising
publication has been delayed until now. An extension to the survey
was published in 2005:
http://iopscience.iop.org/article/10.1086/426320/

About half the galaxies were already known, but the data give new
definition to the "Norma Wall" in the direction of the Great
Attractor and also show several other galaxy groupings.

Wow, that's some lax publication deadlines if all of this stuff was
found out back in 2000 & 2005!

I googled Norma Wall, it doesn't come back with anything useful. What is it?

Yousuf Khan

Dear Yousuf Khan:

On Friday, February 12, 2016 at 9:29:45 AM UTC-7, Yousuf Khan wrote:
On 11/02/2016 4:20 PM, Steve Willner wrote:
The survey used the 21 cm line of neutral hydrogen and
detected 889 galaxies. Observations finished in year
2000, and it's surprising publication has been delayed
until now. An extension to the survey was published
in 2005:
http://iopscience.iop.org/article/10.1086/426320/

About half the galaxies were already known, but the
data give new definition to the "Norma Wall" in the
direction of the Great Attractor and also show
several other galaxy groupings.

Wow, that's some lax publication deadlines if all of
this stuff was found out back in 2000 & 2005!

I googled Norma Wall, it doesn't come back with
anything useful. What is it?

I find this the earliest paper that referred to it on arxiv.org, with a handfull of papers that return on a search for it:
http://arxiv.org/abs/astro-ph/9705152

David A. Smith

In article ,
dlzc writes:
I find this the earliest paper that referred to it on arxiv.org,
with a handfull of papers that return on a search for it:
http://arxiv.org/abs/astro-ph/9705152

Well done! Also see Fig 18 in the preprint of the current work.
"ZOA" is Zone of Avoidance, i.e., near the Milky Way plane.

An ADS search for "Norma Wall" in the abstract turned up only three
papers (not including the one under discussion or the survey
extension mentioned earlier). Oddly, the one dlzc found didn't turn
up in that search, so probably more papers exist. This region is
difficult to study.

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