ASTRO: NGC 7479

NGC 7479 is an unsymmetrical barred spiral about 100 million light years
away. Since it appears larger than Arp 13 and is more distant we can
immediately tell it is a much larger galaxy. The bar, as many do, is
feeding dust and gas to the core. This is giving the black hole at the
center something to "eat". Thus, this is a Seyfert galaxy. Massive
star formation is going on in the arms and to some extent at the very
core. The core stars are explained by the constant inflow of material
via the bar. That though doesn't explain massive star formation in the
disk and arms. A collision would be one reason but other than the
distorted, non symmetrical arms there's little obvious evidence of one.
Certainly no obvious candidate in the area. Or is there? Some are
now saying this is all the result of a "minor merger" with a small
galaxy. A couple papers say they can identify the remains of the
merging galaxy. If so it happened some 300 million years ago. Too bad
early life on earth didn't have an observatory to verify this. I've
attached a cropped version with the suspect marked between two black
lines. Unfortunately, my poor winter seeing greatly hurt this galaxy as
well, as did my having to image it far to the west where my seeing is
always worse, apparently due to a warm area of the lake where springs
are located. Its the only reason I can think of for winter seeing to be
so poor in that part of the sky. I tried to compensate by taking twice
the luminosity data I normally do and 50% more color data. It did help.

Those of you that like to wade through deep articles can read about this
galaxy and the possible merger at:
http://www.iop.org/EJ/article/0004-6...141/51181.html
Those not into wading through deep "stuff" can jump to the conclusion in
the last paragraph and skip the rest.

14" LX200R @ f/10, L=8x10' binned 2x2, RGB=3x10' binned 3x3,
STL-11000XM, Paramount ME

Rick
--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

Nice image Rick,

and thanks for information.

regards
Fabio

"Rick Johnson" ha scritto nel messaggio
ster.com...
NGC 7479 is an unsymmetrical barred spiral about 100 million light years
away. Since it appears larger than Arp 13 and is more distant we can
immediately tell it is a much larger galaxy. The bar, as many do, is
feeding dust and gas to the core. This is giving the black hole at the
center something to "eat". Thus, this is a Seyfert galaxy. Massive
star formation is going on in the arms and to some extent at the very
core. The core stars are explained by the constant inflow of material
via the bar. That though doesn't explain massive star formation in the
disk and arms. A collision would be one reason but other than the
distorted, non symmetrical arms there's little obvious evidence of one.
Certainly no obvious candidate in the area. Or is there? Some are
now saying this is all the result of a "minor merger" with a small
galaxy. A couple papers say they can identify the remains of the
merging galaxy. If so it happened some 300 million years ago. Too bad
early life on earth didn't have an observatory to verify this. I've
attached a cropped version with the suspect marked between two black
lines. Unfortunately, my poor winter seeing greatly hurt this galaxy as
well, as did my having to image it far to the west where my seeing is
always worse, apparently due to a warm area of the lake where springs
are located. Its the only reason I can think of for winter seeing to be
so poor in that part of the sky. I tried to compensate by taking twice
the luminosity data I normally do and 50% more color data. It did help.

Those of you that like to wade through deep articles can read about this
galaxy and the possible merger at:
http://www.iop.org/EJ/article/0004-6...141/51181.html
Those not into wading through deep "stuff" can jump to the conclusion in
the last paragraph and skip the rest.

14" LX200R @ f/10, L=8x10' binned 2x2, RGB=3x10' binned 3x3,
STL-11000XM, Paramount ME

Rick
--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

Great image Rick. Maybe a bit too much deconvolution, but very deep and
detailed. NGC 7479 is one of those objects where I never got the detail I
had hoped for.

Stefan

"Rick Johnson" schrieb im Newsbeitrag
ster.com...
NGC 7479 is an unsymmetrical barred spiral about 100 million light years
away. Since it appears larger than Arp 13 and is more distant we can
immediately tell it is a much larger galaxy. The bar, as many do, is
feeding dust and gas to the core. This is giving the black hole at the
center something to "eat". Thus, this is a Seyfert galaxy. Massive
star formation is going on in the arms and to some extent at the very
core. The core stars are explained by the constant inflow of material
via the bar. That though doesn't explain massive star formation in the
disk and arms. A collision would be one reason but other than the
distorted, non symmetrical arms there's little obvious evidence of one.
Certainly no obvious candidate in the area. Or is there? Some are
now saying this is all the result of a "minor merger" with a small
galaxy. A couple papers say they can identify the remains of the
merging galaxy. If so it happened some 300 million years ago. Too bad
early life on earth didn't have an observatory to verify this. I've
attached a cropped version with the suspect marked between two black
lines. Unfortunately, my poor winter seeing greatly hurt this galaxy as
well, as did my having to image it far to the west where my seeing is
always worse, apparently due to a warm area of the lake where springs
are located. Its the only reason I can think of for winter seeing to be
so poor in that part of the sky. I tried to compensate by taking twice
the luminosity data I normally do and 50% more color data. It did help.

Those of you that like to wade through deep articles can read about this
galaxy and the possible merger at:
http://www.iop.org/EJ/article/0004-6...141/51181.html
Those not into wading through deep "stuff" can jump to the conclusion in
the last paragraph and skip the rest.

14" LX200R @ f/10, L=8x10' binned 2x2, RGB=3x10' binned 3x3,
STL-11000XM, Paramount ME

Rick
--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

Yes, I really pushed it as my seeing was over 6". Without it being
pushed I had a blob. Got it down to about 4.2" but it looks rather
harsh because of it. I have to get it early next year before it has
moved to above the springs.

Rick


Stefan Lilge wrote:
Great image Rick. Maybe a bit too much deconvolution, but very deep and
detailed. NGC 7479 is one of those objects where I never got the detail I
had hoped for.

Stefan

"Rick Johnson" schrieb im Newsbeitrag
ster.com...

NGC 7479 is an unsymmetrical barred spiral about 100 million light years
away. Since it appears larger than Arp 13 and is more distant we can
immediately tell it is a much larger galaxy. The bar, as many do, is
feeding dust and gas to the core. This is giving the black hole at the
center something to "eat". Thus, this is a Seyfert galaxy. Massive
star formation is going on in the arms and to some extent at the very
core. The core stars are explained by the constant inflow of material
via the bar. That though doesn't explain massive star formation in the
disk and arms. A collision would be one reason but other than the
distorted, non symmetrical arms there's little obvious evidence of one.
Certainly no obvious candidate in the area. Or is there? Some are
now saying this is all the result of a "minor merger" with a small
galaxy. A couple papers say they can identify the remains of the
merging galaxy. If so it happened some 300 million years ago. Too bad
early life on earth didn't have an observatory to verify this. I've
attached a cropped version with the suspect marked between two black
lines. Unfortunately, my poor winter seeing greatly hurt this galaxy as
well, as did my having to image it far to the west where my seeing is
always worse, apparently due to a warm area of the lake where springs
are located. Its the only reason I can think of for winter seeing to be
so poor in that part of the sky. I tried to compensate by taking twice
the luminosity data I normally do and 50% more color data. It did help.

Those of you that like to wade through deep articles can read about this
galaxy and the possible merger at:
http://www.iop.org/EJ/article/0004-6...141/51181.html
Those not into wading through deep "stuff" can jump to the conclusion in
the last paragraph and skip the rest.

14" LX200R @ f/10, L=8x10' binned 2x2, RGB=3x10' binned 3x3,
STL-11000XM, Paramount ME

Rick
--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".





--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".