| |
Main
Date: 18 Jul 2007 00:20:38
From: bernhard@bgrems.com
Subject: A galaxy like this - how can it form? (with picture)
|
I am helping at galaxyzoo.org by categorizing galaxies there. Once in
a while, I stumble across very nice and beautiful objects (from time
to time you see things like pretty mergers or even gravitational
lensing).
Recently, I found a "spiral" that looks so bizarre, I have to share
with you.
Have a look: http://www.digirockers.com/depot/wheel.jpg
My question is: How did this galaxy come to look like it looks? How
would you classify it?
If you are interested, I can share other findings with you as well.
Best,
Bernhard
|
|
| |
Date: 19 Jul 2007 12:31:31
From: Havriliak@aol.com
Subject: Re: A galaxy like this - how can it form? (with picture)
|
On Jul 18, 3:20?am, "bernh...@bgrems.com" <bernh...@bgrems.com > wrote:
> I am helping at galaxyzoo.org by categorizing galaxies there. Once in
> a while, I stumble across very nice and beautiful objects (from time
> to time you see things like pretty mergers or even gravitational
> lensing).
>
> Recently, I found a "spiral" that looks so bizarre, I have to share
> with you.
>
> Have a look:http://www.digirockers.com/depot/wheel.jpg
>
> My question is: How did this galaxy come to look like it looks? How
> would you classify it?
>
> If you are interested, I can share other findings with you as well.
>
> Best,
> Bernhard
I'm doing he same project. Only 999,942 objects left to go. It
doesen't fit in any of their classification. I've seen a reference to
that type as a "Saturn" type.
|
| |
Date: 19 Jul 2007 11:19:29
From: RedShift40
Subject: Re: A galaxy like this - how can it form? (with picture)
|
It states in the FAQ, to mark (ring galaxies) down as edge on/unclear. I
found 4 of them this morning. I am going to collect the strange ones and
post them soon.
The FAQ also state, the Irregular galaxies should go in the star/don't know
bin. Same goes with (the many) blurry objects.
Happy hunting!
Stuart. H.
<bernhard@bgrems.com > wrote in message
news:1184743238.754946.86240@d30g2000prg.googlegroups.com...
>I am helping at galaxyzoo.org by categorizing galaxies there. Once in
> a while, I stumble across very nice and beautiful objects (from time
> to time you see things like pretty mergers or even gravitational
> lensing).
>
> Recently, I found a "spiral" that looks so bizarre, I have to share
> with you.
>
> Have a look: http://www.digirockers.com/depot/wheel.jpg
>
> My question is: How did this galaxy come to look like it looks? How
> would you classify it?
>
> If you are interested, I can share other findings with you as well.
>
> Best,
> Bernhard
>
|
| |
Date: 18 Jul 2007 16:01:46
From: Sam Wormley
Subject: Re: A galaxy like this - how can it form? (with picture)
|
bernhard@bgrems.com wrote:
> I am helping at galaxyzoo.org by categorizing galaxies there. Once in
> a while, I stumble across very nice and beautiful objects (from time
> to time you see things like pretty mergers or even gravitational
> lensing).
>
> Recently, I found a "spiral" that looks so bizarre, I have to share
> with you.
>
> Have a look: http://www.digirockers.com/depot/wheel.jpg
>
> My question is: How did this galaxy come to look like it looks? How
> would you classify it?
>
> If you are interested, I can share other findings with you as well.
>
> Best,
> Bernhard
>
Galaxy Collisions
http://www.public.iastate.edu/~curt/cg/homepage.html
Theories of how galaxies, the fundamental constituents of large-scale structure,
form and evolve have undergone a dramatic paradigm shift in the last few decades.
Earlier views were of rapid, early collapse and formation of basic structures,
followed by slow evolution of the stellar populations and steady buildup of the
chemical elements. Current theories emphasize hierarchical buildup via recurrent
collisions and mergers, separated by long periods of relaxation and secular
restructuring. Thus, collisions between galaxies are now seen as a primary
process in their evolution. This article begins with a brief history; we then
tour parts of the vast array of collisional forms that have been discovered to
date. Many examples are provided to illustrate how detailed numerical models and
multiwaveband observations have allowed the general chronological sequence of
collisional morphologies to be deciphered, and how these forms are produced by
the processes of tidal kinematics, hypersonic gas dynamics, collective dynamical
friction and violent relaxation. Galaxy collisions may trigger the formation of
a large fraction of all the stars ever formed, and play a key role in fueling
active galactic nuclei. Current understanding of the processes involved is
reviewed. The last decade has seen exciting new discoveries about how collisions
are orchestrated by their environment, how collisional processes depend on
environment, and how these environments depend on redshift or cosmological time.
See: http://www.public.iastate.edu/~curt/cg/homepage.html
|
| | |
Date: 21 Jul 2007 05:46:11
From: Zomp
Subject: Re: A galaxy like this - how can it form? (with picture)
|
That is a planetary nebula. It occures when a star of between 0.9 solar
masses to 1.3 solar masses runs low on hydrogen in the core. The core
overheats as helium burning begins and the tell tale technetium flare
appears in the corona. This occurs half way through the lifetime of this
main sequence star. All stars execute this stella nova that throws of a
sphere of gas once the overheating occurs as a sound wave. The frequency is
the cephid variable frequency for stars of this mass and i can be
calculated purely from the mass, stars above 1.3 solar masses the gas falls
back but below the gas expands. These stars of below 1.3 solar masses to 0.9
solar masses have shells of gas inside each other as each exoplosion occurs
ever 500 years or so depending on the mass and this continues for millions
of years until the mass reaches 0.9 solar masses when the star becomes
stable (brown dwarves). Stars over 3 solar masses (blue giants) execute a
super nova instead at the end of their lives.
Stars between 1.3 and 3 solar masses expand into red giants before finally
exploding as a super nova.
Our own sun began its termination about 6000 years ago when it became a
technitium flare star, about 2000 years ago the oscillations with a period
of 500 years started 0ad hot, 1000ad hot, 2000ad hot. 500 ad was cold 1500
ad was cold.
as the core gets hotter the oscillations get bigger.
The core temperature may be measured by the neutron flux and historical
meaurements of Be10 in ice cores show how this changes with time.
The last time I looked this signal shows are drop in core temperasture.
I suppose that is why Hitler built his star ship so healthy individuals
could lesve the solar system and colonise other solar systems thus
maximising the survival of the human species, however the foolish catholic
clergy regected this (fear) as it may have been one of the messages Jesus
brought.
This is in denyal of any "son of god" interpretatoin.
People don't like it but that is what happened. Nothing to do with God at
all.
silly billy.
"Sam Wormley" <swormley1@mchsi.com > wrote in message
news:KPqni.31847$Fc.26809@attbi_s21...
> bernhard@bgrems.com wrote:
>> I am helping at galaxyzoo.org by categorizing galaxies there. Once in
>> a while, I stumble across very nice and beautiful objects (from time
>> to time you see things like pretty mergers or even gravitational
>> lensing).
>>
>> Recently, I found a "spiral" that looks so bizarre, I have to share
>> with you.
>>
>> Have a look: http://www.digirockers.com/depot/wheel.jpg
>>
>> My question is: How did this galaxy come to look like it looks? How
>> would you classify it?
>>
>> If you are interested, I can share other findings with you as well.
>>
>> Best,
>> Bernhard
>>
>
> Galaxy Collisions
> http://www.public.iastate.edu/~curt/cg/homepage.html
>
> Theories of how galaxies, the fundamental constituents of large-scale
> structure,
> form and evolve have undergone a dramatic paradigm shift in the last few
> decades.
> Earlier views were of rapid, early collapse and formation of basic
> structures,
> followed by slow evolution of the stellar populations and steady buildup
> of the
> chemical elements. Current theories emphasize hierarchical buildup via
> recurrent
> collisions and mergers, separated by long periods of relaxation and
> secular
> restructuring. Thus, collisions between galaxies are now seen as a
> primary
> process in their evolution. This article begins with a brief history; we
> then
> tour parts of the vast array of collisional forms that have been
> discovered to
> date. Many examples are provided to illustrate how detailed numerical
> models and
> multiwaveband observations have allowed the general chronological
> sequence of
> collisional morphologies to be deciphered, and how these forms are
> produced by
> the processes of tidal kinematics, hypersonic gas dynamics, collective
> dynamical
> friction and violent relaxation. Galaxy collisions may trigger the
> formation of
> a large fraction of all the stars ever formed, and play a key role in
> fueling
> active galactic nuclei. Current understanding of the processes involved
> is
> reviewed. The last decade has seen exciting new discoveries about how
> collisions
> are orchestrated by their environment, how collisional processes depend
> on
> environment, and how these environments depend on redshift or
> cosmological time.
>
> See: http://www.public.iastate.edu/~curt/cg/homepage.html
|
| | | |
Date: 21 Jul 2007 21:38:14
From: David Knisely
Subject: Re: A galaxy like this - how can it form? (with picture)
|
Zoop posted:
> That is a planetary nebula.
Uh, no, it is very probably a spiral galaxy with inner and outer ring
formations. The image has enough scale to see some of the mottling that
often represents OB Associations in the arms, as well as two narrow gaps
in the outer arms. Clear skies to you.
--
David W. Knisely KA0CZC@navix.net
Prairie Astronomy Club: http://www.prairieastronomyclub.org
Hyde Memorial Observatory: http://www.hydeobservatory.info/
**********************************************
* Attend the 14th Annual NEBRASKA STAR PARTY *
* July 15th-20th, 2007, Merritt Reservoir *
* http://www.NebraskaStarParty.org *
**********************************************
|
| | | |
Date: 21 Jul 2007 13:10:01
From: Sam Wormley
Subject: Re: A galaxy like this - how can it form? (with picture)
|
Zomp wrote:
>
> Stars between 1.3 and 3 solar masses expand into red giants before finally
> exploding as a super nova.
>
If silly billy wants to be known as wise william, he'll have to study some
physics and astronomy. Stars between 1.3 and 3 solar masses do *not* explode
as supernovae, but become white dwarfs.
|
| |
Date: 18 Jul 2007 17:40:47
From: Norbert
Subject: Re: A galaxy like this - how can it form? (with picture)
|
bernhard@bgrems.com nous a donc écrit :
> I am helping at galaxyzoo.org by categorizing galaxies there. Once in
> a while, I stumble across very nice and beautiful objects (from time
> to time you see things like pretty mergers or even gravitational
> lensing).
>
> Recently, I found a "spiral" that looks so bizarre, I have to share
> with you.
>
> Have a look: http://www.digirockers.com/depot/wheel.jpg
>
> My question is: How did this galaxy come to look like it looks? How
> would you classify it?
>
This is called a "ring galaxy".
Such a galaxy may be the result of a collision, but it could also be an old
barred spiral galaxy, whose bar has dissolved.
The most well known of these galaxies is the Hoag's object.
--
Norbert. (no X for the answer)
======================================
knowing the universe - stellar and galaxies evolution
http://nrumiano.free.fr
images of the sky http://images.ciel.free.fr
======================================
|
| |
Date: 18 Jul 2007 08:33:15
From: RedShift40
Subject: Re: A galaxy like this - how can it form? (with picture)
|
Just hit the lenticular button. Oh right, there isn't one!?
Stuart
<bernhard@bgrems.com > wrote in message
news:1184743238.754946.86240@d30g2000prg.googlegroups.com...
>I am helping at galaxyzoo.org by categorizing galaxies there. Once in
> a while, I stumble across very nice and beautiful objects (from time
> to time you see things like pretty mergers or even gravitational
> lensing).
>
> Recently, I found a "spiral" that looks so bizarre, I have to share
> with you.
>
> Have a look: http://www.digirockers.com/depot/wheel.jpg
>
> My question is: How did this galaxy come to look like it looks? How
> would you classify it?
>
> If you are interested, I can share other findings with you as well.
>
> Best,
> Bernhard
>
|
| | |
Date: 18 Jul 2007 07:58:21
From: Marty
Subject: Re: A galaxy like this - how can it form? (with picture)
|
Could it be the little galaxy below it and to the left scored a bullseye
sometime in the past?
Marty
|
|
