ASTRO: Crab in [NII] = Red, Ha = Green, [OIII] = Blue

just a short exposure from Sat night before the clouds shut me down

then there's the [NII] = Red, Ha = Green = Blue shot too, showing that I can
separate those lines that are only 2nm apart

Cool Richard... looks quite different in narrow band.

--
Regards, Doug W.
www.photonsfate.com
--
"Richard Crisp" wrote in message
. net...
just a short exposure from Sat night before the clouds shut me down

then there's the [NII] = Red, Ha = Green = Blue shot too, showing that I
can separate those lines that are only 2nm apart

Very impressed Richard
Kev

"Richard Crisp" wrote in message
. net...
just a short exposure from Sat night before the clouds shut me down

then there's the [NII] = Red, Ha = Green = Blue shot too, showing that I
can separate those lines that are only 2nm apart

"Richard Crisp" wrote
...
just a short exposure from Sat night before the clouds shut me down

then there's the [NII] = Red, Ha = Green = Blue shot too, showing that I
can separate those lines that are only 2nm apart

Cool image of the Crab! This completely separates out the turbulent material
by eliminating the blue synchrotron radiation.

George N

here is the synchrotron making it through in the HeII filter

this is Red=[SII], Green = [OIII] and Blue = HeliumII (468nm line)

according to a spectrogram in Simon Mitton's book "The Crab Nebula", there
is in fact Helium II emission in the Crab




"George Normandin" wrote in message
...
"Richard Crisp" wrote
...
just a short exposure from Sat night before the clouds shut me down

then there's the [NII] = Red, Ha = Green = Blue shot too, showing that I
can separate those lines that are only 2nm apart

Cool image of the Crab! This completely separates out the turbulent
material
by eliminating the blue synchrotron radiation.

George N

"Richard Crisp" wrote
...
here is the synchrotron making it through in the HeII filter

this is Red=[SII], Green = [OIII] and Blue = HeliumII (468nm line)

according to a spectrogram in Simon Mitton's book "The Crab Nebula", there
is in fact Helium II emission in the Crab


Richard,

Interesting. Stripping both electrons off He is starting to get into
some "serious" energy, but then we are talking a supernova remnant!

George N.

helium II is singly ionized, George.

To be doubly ionized it would be called Helium III

There's no Helium IV though!

Turns out that Helium II 468 line is a very special line found only in the
vicinity of very hot sources of energy

You can turn up a lot of interesting information about Helium II 468 with a
good search engine


"George Normandin" wrote in message
...
"Richard Crisp" wrote
...
here is the synchrotron making it through in the HeII filter

this is Red=[SII], Green = [OIII] and Blue = HeliumII (468nm line)

according to a spectrogram in Simon Mitton's book "The Crab Nebula",
there is in fact Helium II emission in the Crab


Richard,

Interesting. Stripping both electrons off He is starting to get into
some "serious" energy, but then we are talking a supernova remnant!

George N.

"Richard Crisp" wrote
....
helium II is singly ionized, George.

Right....... not enough sleep.........

George N