Author Topic: Place your lenticular (S0) galaxies in this thread  (Read 198947 times)

abacuswl

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clinchg

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #16 on: November 03, 2007, 02:54:02 am »
This galaxy popped up during my analysis this evening. I tried to classify it but it wasn't quite a spiral nor obvious elliptical. I followed a few threads and ended up here. The larger sdss image shows more clockwise spiral than the analysis image. Would this classify as an S0? If so, I hope it can be an example to advance this topic.



This is also my first forum post so if the image does not appear the Reference number is 588017949888086089.

Thanks!

Aza

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #17 on: November 03, 2007, 11:13:37 am »

trevor faller

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #18 on: November 03, 2007, 12:17:09 pm »
This galaxy popped up during my analysis this evening. I tried to classify it but it wasn't quite a spiral nor obvious elliptical. I followed a few threads and ended up here. The larger sdss image shows more clockwise spiral than the analysis image. Would this classify as an S0? If so, I hope it can be an example to advance this topic.




would go for lenticular with inner rings

Although lenticular galaxies do not vary in shape as much as spiral galaxies, they may still be divided into a series of subclasses based on their appearance. Some of these subclasses are described below.


Bars
In the de Vaucouleurs classification system, lenticular galaxies may be split into  subclasses based on the presence or absence of a central bar structure. The SA0 designation is used for lenticular galaxies with no apparent bars. The SB0 designation is used for galaxies with a strong bar. The SAB0 designation is an intermediate class that may be referred to as weakly barred.[1]


 Inner ring
Some lenticular galaxies are also given inner ring (S0(r)) 

katherine

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #19 on: November 03, 2007, 01:38:04 pm »

EricFDiaz

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #20 on: November 03, 2007, 08:50:43 pm »
Hi Eric & everyone, what can you tell me about this one, first posted in Analysis Tips?  (Got some amusing opinions there!) Thanks
http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=587730774959915150

Hi mgp,

Well other than the fact that this is NGC 7711, goes by a number of identifiers, has a very bright core and is a very pretty lenticular (S0) galaxy, it does appear to have some kind of perturbation present. To the left is what appears to be tidal star tails and yet the overall structure of the galaxy appears to be unperturbed. There's no data, that I have found, of a perturbing neighbor, so I can't really explain it. The large bulge to the right, however, can be explained by a barred structure in the galaxy. Although it's odd that it's asymmetrical, this would be classified in G. de Vaucouleurs classification system as an SB0 type galaxy, with 'B' denoting a barred structure in the galaxy. I must admit, though, that the giant bulge to the right is kind of strange looking.

NGC 7711
« Last Edit: November 04, 2007, 03:38:30 am by EricFDiaz »

EricFDiaz

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #21 on: November 03, 2007, 09:08:47 pm »
Nice find, clinchg!!! ;)

You've been reading up on G. de Vaucouleurs classification system I see, Trevor.  ;) ;D ;D Nice job identifying and explaining clinchg's S0(r) type galaxy.
« Last Edit: November 03, 2007, 09:25:52 pm by EricFDiaz »

Vanderdecken

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #22 on: November 04, 2007, 11:26:24 am »


Could the central one be lenticular?

ObjId.

quarkspin

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Re: Place your lenticular (S0) galaxies in this thread 588017978339164335
« Reply #23 on: November 04, 2007, 02:47:04 pm »
588017978339164335



Maybe lenticular?
Q

clinchg

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #24 on: November 04, 2007, 03:00:36 pm »
Reference Number: 587735349101789401

I've just started reading Debra Meloy Elmegreen's Galaxies & Galactic Structure and the explanations have been very useful. I'll go out on limb and call this galaxy SO/SBO. Central bulge, a bar, and lens. Also a sharp boundary between the inner bright region and an apparent diffuse outer region. Would you all agree?




quarkspin

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Re: Place your lenticular (S0) galaxies in this thread 587735695367012388
« Reply #25 on: November 04, 2007, 03:04:04 pm »
587735695367012388



Q

jlowe

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #26 on: November 04, 2007, 03:45:11 pm »
At risk of being a bore .. searching for more information on S0's I've found several interesting links for anyone interested..
Hubble Types of Galaxies
SDSS
Keel's site on Galaxy Classification
Published in "Galaxies and the Universe", edited by A. Sandage, M. Sandage and J. Kristian, 1975
If only time didn't take so long ... we'd be there by now

EricFDiaz

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #27 on: November 04, 2007, 03:59:08 pm »
Thanks, jlowe. It is greatly appreciated. ;) Eric
« Last Edit: November 04, 2007, 05:34:05 pm by EricFDiaz »

dlocksmith

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EricFDiaz

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #29 on: November 04, 2007, 06:56:13 pm »