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ASTRO: NGC 5005 Another rarely imaged galaxy



 
 
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  #1  
Old October 26th 13, 07:29 AM posted to alt.binaries.pictures.astro
Rick Johnson[_2_]
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Posts: 3,085
Default ASTRO: NGC 5005 Another rarely imaged galaxy

NGC 5005 is a bright spiral galaxy in Canes Venatici that's about 54
million light-years distant by redshift and 55 million by Tully Fisher
measurements. A surprisingly close agreement. It is considered by some
to be a companion to the much more famous, highly warped galaxy, NGC
5033 about 41 minutes to the southeast and thus out of my frame. NED
classes NGC 5005 as SAB(rs)bc;Sy2 LINER while the NGC Project says, Sb
(no bar). Most notes at NED refer to the bar saying it is offset from
the major axis by 30 degrees. I see no hint of it visually. This is
likely why the NGC Project doesn't recognize it. It seems rather dust
red reddened.

Above NGC 5005 is the dwarf irregular galaxy LEDA 166157. I couldn't
find much more than this about this obviously very blue, low surface
brightness galaxy. It did make the Karachentseva and Karachenstev list
of new nearby dwarf galaxy candidates.
http://aas.aanda.org/articles/aas/pd.../03/ds6146.pdf The distances
to some entries were later estimated but not for entry 188 which is LEDA
166157 unfortunately. There is a newer paper on these by the same
authors but it is behind a pay wall so I didn't investigate further.
http://cdsbib.u-strasbg.fr/cgi-bin/c...stL...33..512K

As with much of the year, weather took its toll on the image. The blue
frames were very bright with a background twice that of red and green.
That is very unusual. Again, I was sleeping while this data was taken
so I don't know what caused the problem. Even after all my color
balance tricks the galaxy doesn't quite look right to me as to color.
Might just be due to below average seeing. Certainly the luminance
frames didn't go nearly as deep as usual coming up a good magnitude
short of normal skies.

I'd have included a link to my NGC 5033 image but it isn't posted
anyplace and in dire need of reprocessing as it goes back to 2007 when I
didn't know much about processing images. There are a ton of images of
this warped galaxy on the net anyway.

14" LX200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME

Rick


--
Prefix is correct. Domain is arvig dot net

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  #2  
Old October 27th 13, 10:53 PM posted to alt.binaries.pictures.astro
Stefan Lilge
external usenet poster
 
Posts: 2,269
Default ASTRO: NGC 5005 Another rarely imaged galaxy

Rick,

very good detail and colour (not much to be found in that object).
It does have a decent brightness, so I might be tempted to revisit it next
year...

Stefan

"Rick Johnson" schrieb im Newsbeitrag
...

NGC 5005 is a bright spiral galaxy in Canes Venatici that's about 54
million light-years distant by redshift and 55 million by Tully Fisher
measurements. A surprisingly close agreement. It is considered by some
to be a companion to the much more famous, highly warped galaxy, NGC
5033 about 41 minutes to the southeast and thus out of my frame. NED
classes NGC 5005 as SAB(rs)bc;Sy2 LINER while the NGC Project says, Sb
(no bar). Most notes at NED refer to the bar saying it is offset from
the major axis by 30 degrees. I see no hint of it visually. This is
likely why the NGC Project doesn't recognize it. It seems rather dust
red reddened.

Above NGC 5005 is the dwarf irregular galaxy LEDA 166157. I couldn't
find much more than this about this obviously very blue, low surface
brightness galaxy. It did make the Karachentseva and Karachenstev list
of new nearby dwarf galaxy candidates.
http://aas.aanda.org/articles/aas/pd.../03/ds6146.pdf The distances
to some entries were later estimated but not for entry 188 which is LEDA
166157 unfortunately. There is a newer paper on these by the same
authors but it is behind a pay wall so I didn't investigate further.
http://cdsbib.u-strasbg.fr/cgi-bin/c...stL...33..512K

As with much of the year, weather took its toll on the image. The blue
frames were very bright with a background twice that of red and green.
That is very unusual. Again, I was sleeping while this data was taken
so I don't know what caused the problem. Even after all my color
balance tricks the galaxy doesn't quite look right to me as to color.
Might just be due to below average seeing. Certainly the luminance
frames didn't go nearly as deep as usual coming up a good magnitude
short of normal skies.

I'd have included a link to my NGC 5033 image but it isn't posted
anyplace and in dire need of reprocessing as it goes back to 2007 when I
didn't know much about processing images. There are a ton of images of
this warped galaxy on the net anyway.

14" LX200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME

Rick


--
Prefix is correct. Domain is arvig dot net

  #3  
Old October 28th 13, 02:17 AM
WA0CKY WA0CKY is offline
Senior Member
 
First recorded activity by SpaceBanter: Feb 2008
Posts: 689
Default

The annotated image overlooked LEDA 4574306 to the southeast of NGC 5005 and seen in the corner of the cropped image. It is apparently a dwarf member of the group that includes NGC 5005 and others mentioned below. I've attached the corrected annotated image below.

Rick

Quote:
Originally Posted by Rick Johnson[_2_] View Post
NGC 5005 is a bright spiral galaxy in Canes Venatici that's about 54
million light-years distant by redshift and 55 million by Tully Fisher
measurements. A surprisingly close agreement. It is considered by some
to be a companion to the much more famous, highly warped galaxy, NGC
5033 about 41 minutes to the southeast and thus out of my frame. NED
classes NGC 5005 as SAB(rs)bc;Sy2 LINER while the NGC Project says, Sb
(no bar). Most notes at NED refer to the bar saying it is offset from
the major axis by 30 degrees. I see no hint of it visually. This is
likely why the NGC Project doesn't recognize it. It seems rather dust
red reddened.

Above NGC 5005 is the dwarf irregular galaxy LEDA 166157. I couldn't
find much more than this about this obviously very blue, low surface
brightness galaxy. It did make the Karachentseva and Karachenstev list
of new nearby dwarf galaxy candidates.
http://aas.aanda.org/articles/aas/pd.../03/ds6146.pdf The distances
to some entries were later estimated but not for entry 188 which is LEDA
166157 unfortunately. There is a newer paper on these by the same
authors but it is behind a pay wall so I didn't investigate further.
http://cdsbib.u-strasbg.fr/cgi-bin/c...stL...33..512K

As with much of the year, weather took its toll on the image. The blue
frames were very bright with a background twice that of red and green.
That is very unusual. Again, I was sleeping while this data was taken
so I don't know what caused the problem. Even after all my color
balance tricks the galaxy doesn't quite look right to me as to color.
Might just be due to below average seeing. Certainly the luminance
frames didn't go nearly as deep as usual coming up a good magnitude
short of normal skies.

I'd have included a link to my NGC 5033 image but it isn't posted
anyplace and in dire need of reprocessing as it goes back to 2007 when I
didn't know much about processing images. There are a ton of images of
this warped galaxy on the net anyway.

14" LX200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME

Rick


--
Prefix is correct. Domain is arvig dot net
Attached Thumbnails
Click image for larger version

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Views:	85
Size:	157.4 KB
ID:	4807  
 




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