A Space & astronomy forum. SpaceBanter.com

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » SpaceBanter.com forum » Others » Astro Pictures
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

ASTRO: NGC 6384



 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old July 31st 12, 08:36 AM posted to alt.binaries.pictures.astro
Rick Johnson[_2_]
external usenet poster
 
Posts: 3,085
Default ASTRO: NGC 6384

NGC 6384 is a low surface brightness galaxy in Ophiuchus about 80
million light-years away. Not a constellation in which you find many
nice spiral galaxies! It is more the globular cluster constellation.
It is also the Zodiac constellation astrologers ignore. NED classes it
as SAB(r)bc and as a LINER galaxy. The NGC Project using a different
classification scheme says SBbc I. It is somewhat obscured and of low
surface brightness making it a bit of a challenging target. I didn't
try to correct the color for reddening. Due to it being somewhat
obscured by our galaxies dust. Looking at various color images on the
net I find it in a field of far more blue stars than I show. I can't
explain the difference but it could be from adjusting the blue back into
the galaxy but not excluding the unobscured stars from this blue boost.
I used the simple G2V balancing of the unobscured stars. This likely
left the galaxy too red due to extinction.

Being in a heavily obscured area of the sky it is not covered by the
Sloan survey. Only 6 galaxies are listed in NED as being in this field,
none with any distance data but NGC 6384 itself.

Several papers indicated the arms were smooth and featureless. That
certainly isn't the impression I got in my image so I had to do some
digging. I found a great Hubble Space Telescope image of it that
certainly doesn't show the arms as smooth and featureless. Also several
papers indicated there was no star formation going on in the core.
Strange as most theories on barred spirals say the bar funnels in gas
and dust triggering star formation around the core area. The text with
the Hubble image says that they see star formation around the core area
triggered by dust and gas that is being funneled into the core. Odd the
experts can't seem to agree on what's going on in this much studied
galaxy. The HST image and text is at:
http://www.spacetelescope.org/images/potw1108a/

I'll let their webpage fill in the details sparse as they are.

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

Name:	NGC6384L4X10RGB2X10R.JPG
Views:	323
Size:	529.3 KB
ID:	4209  Click image for larger version

Name:	NGC6384L4X10RGB2X10RCROP150.JPG
Views:	128
Size:	170.6 KB
ID:	4210  
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
ASTRO: NGC 6384 spiral galaxy in Ophiuchus Danilo Pivato Astro Pictures 1 October 5th 10 04:41 AM
[sci.astro,sci.astro.seti] Contents (Astronomy Frequently Asked Questions) (0/9) [email protected] SETI 0 August 15th 07 09:36 PM
[sci.astro,sci.astro.seti] Contents (Astronomy Frequently Asked Questions) (0/9) [email protected] SETI 0 May 3rd 07 01:08 AM
[sci.astro,sci.astro.seti] Contents (Astronomy Frequently Asked Questions) (0/9) [email protected] Astronomy Misc 0 May 3rd 06 12:33 PM
[sci.astro,sci.astro.seti] Contents (Astronomy Frequently Asked Questions) (0/9) [email protected] Astronomy Misc 0 October 6th 05 02:34 AM


All times are GMT +1. The time now is 11:30 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Copyright 2004-2021 SpaceBanter.com.
The comments are property of their posters.