Talk:NGC 3314

message: NGC 3314 Shows a Barred Spiral Overlaying a Flattened Spiral
I note that galaxy pair NGC 3314 actually shows a barred spiral galaxy
overlaying a flattened spiral galaxy. My calculations in my book 
Galaxy Formation by James A. Green show that barred spiral galaxies are typically
about 47 kilolight years across the long axis, and that flattened spirals are typically
88 kilolight years in diameter, which roughly matches the photos of
NGC 3314 showing a barred spiral in Hydra overlaying a flattened spiral.
My book is described on-line at http://greenwdks.tripod.com/galaxy.html.
I derive the relative dimensions of barred spiral galaxies and flattened
spirals by assuming that the galaxies
formed when the pressure jog associated with the first major atomic recombination event took place, which lowered the pressure by changing the particle number n in P=nkT. This was the He++ to He+ transition in the cooling Big Bang fireball. Assuming an average fireball density equal to the Milky Way density, one can derive the dimensions of fllat spirals, ellipticals, and spherical galaxies using the gravitational potential characteristic of that galactic shape, and examining evaporation of gas from their surfaces,
to isolate the dimensions of the bound system.
One can also derive the galactic dimensions involved from Jeans Length pressure wave models, which I do in
the 2nd part of the book.
- Jim Green
http://greenwdks.tripod.com/home.html
http://greenwdks.tripod.com/galaxy.html 
References:
Jerry Bonnell: http://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html.
Robert J. Nemiroff: http://antwrp.gsfc.nasa.gov/htmltest/rjn.html.
NGC 3314 in Astronomy Picture of the Day at http://antwrp.gsfc.nasa.gov/apod/ap000511.html.  
William C. Keel: http://www.astr.ua.edu/keel/, 
http://www.astr.ua.edu/gifimages/ngc3314.html.
Astrographics Photo: http://www.astrographics.com/GalleryPrintsIndex/GP0043.html.
Keith Noll, Space Telescope Science Institute, Baltimore, MD 21218, 
(phone) 410-338-1828, (fax) 410-338-4579, (e-mail) noll@stsci.edu, 
http://nssdc.gsfc.nasa.gov/photo_gallery/caption/hst_ngc3314_0014.txt.
Greydon Moore, greydie@look.com , http://www.cosmicastronomy.com/canopies.htm.
Omega Optical, sales@omegafilters.com, in response to their page
https://www.omegafilters.com/index.php?page=tech_astro_images.
Staff of the Space Telescope Science Institute, help@stsci.edu, in response to
http://www.laughtergenealogy.com/bin/hubble/html/ngc3314.html, 
and also to webmaster@aura-astronomy.org, also in response to this page on NGC 3314.
Cosmic Light.com, steve@cosmiclight.com, http://www.cosmiclight.com/  shows NGC 3314 online.
rwhite@bama.ua.edu, Raymond E. White III published on NGC 3314 in 
Seeing Galaxies Through Thick and Thin: IV. The Superimposed Galaxies of NGC 3314 
along with William C. Keel 
at http://arxiv.org/abs/astro-ph/0106056v1.
—Preceding unsigned comment added by JamesAGreen (talk • contribs) 18:48, 14 October 2007 (UTC)
thread_title: NGC 3314

message: According to , there have been several found in the last few years.
the 800 occulting pairs identified by the Galaxy Zoo project (Raddick et al. 2007; Lintott & the GalaxyZOO team 2008) in the Sloan Digital Sky Survey,
76.66.198.171 (talk) 13:23, 3 January 2009 (UTC)
thread_title:  ''virtually unique'' 

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