Author Topic: Place your lenticular (S0) galaxies in this thread  (Read 190808 times)

EricFDiaz

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #30 on: November 04, 2007, 07:04:49 pm »
It would have been nice if SIMBAD or NED had data confirming that this is a lenticular (S0) galaxy, but since they don't, I'm left only with my gut feeling to go on. I know I'm sticking my neck out a little on this one because of the oblique, almost edge-on viewing angle of this image, but I'm reasonably sure that this is an S0 type galaxy.

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jlowe

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #31 on: November 04, 2007, 07:08:31 pm »
Eric, this is all your fault!! ;) 
Reading a little more in A Knowledge base for Extragalactic Astronomy and Cosmology", "Basic Data: Galaxies->Qualitative classifications of galaxies, alternate systems and modifications->Ellipticals", is the following:

"Elliptical galaxies show very little or no internal structure and they are simply characterized by their apparent ellipticity. In general, ellipticals with major and minor axes, a and b, respectively, are typed En where n = 10 (a - b) / a. Thus E0 galaxies are apparently circular, E7 galaxies are the most flattened. When n exceeds 7, other structures appear (such as a cusp in the light distribution or rings of apparent obscuration), and the galaxy is designated as lenticular or of the S0 class."

I'm sure this is very basic to many of you.. My view is that the Zoo is a wonderful place for me to learn.. thanks for the motivation...
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 #32 on: November 04, 2007, 07:11:04 pm »
I don't believe this, three in a row! That's got to be a record.

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dlocksmith

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #33 on: November 04, 2007, 07:16:45 pm »
Douglas Adams: "There is a theory which states that if ever anybody discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another theory which states that this has already happened."

EricFDiaz

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #34 on: November 04, 2007, 07:22:06 pm »
Make that four in a row. Someone screwed-up on this one in SDSS. On SkyServer Object Explorer it has a redshift of z=0.00 with no zConf value at all. But on SIMBAD it is listed as LEDA 26751, a galaxy, and goes by  other identifiers as well. Now come on! Does this look like a star to you? I mean, give me a break!

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Simplex0

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #35 on: November 04, 2007, 07:53:00 pm »

EricFDiaz

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #36 on: November 04, 2007, 08:09:31 pm »
Eric, this is all your fault!! ;) 
Reading a little more in A Knowledge base for Extragalactic Astronomy and Cosmology", "Basic Data: Galaxies->Qualitative classifications of galaxies, alternate systems and modifications->Ellipticals", is the following:

"Elliptical galaxies show very little or no internal structure and they are simply characterized by their apparent ellipticity. In general, ellipticals with major and minor axes, a and b, respectively, are typed En where n = 10 (a - b) / a. Thus E0 galaxies are apparently circular, E7 galaxies are the most flattened. When n exceeds 7, other structures appear (such as a cusp in the light distribution or rings of apparent obscuration), and the galaxy is designated as lenticular or of the S0 class."

I'm sure this is very basic to many of you.. My view is that the Zoo is a wonderful place for me to learn.. thanks for the motivation...


I accept full responsibility for corrupting you, jlowe.  ;) ;D Level 5 is a wonderful resource. I even have a link to it in my own astronomy site. And you're right about the Zoo being a wonderful place to learn. They're are a lot of knowledgeable people here, and invariably I learn something new every single day. I'm glad that you're having fun with this. That's the way learning should be.  ;)
« Last Edit: November 05, 2007, 04:50:43 am by EricFDiaz »

EricFDiaz

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #37 on: November 04, 2007, 08:18:02 pm »


Could the central one be lenticular?

ObjId.

It could and is, Vanderdecken.  ;)

dlocksmith

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #38 on: November 04, 2007, 08:36:26 pm »
Spiral or lenticular?
http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=587741531715469443


More trivia, from wikipedia, must be true...
Quote
The optical lens is so named after the lentil (Latin: lens), whose shape it resembles. The same applies also to Greek language, where the word φακός means lens and φακή means lentil. In Persian language, a lens is referred to as adasi where adas means lentil. In Hebrew, a lens is known as adasha (plural adashot) and adash (plural adashim) means lentil. In Turkish, mercek means lens and mercimek means lentil. In French the word lentille is used to mean either lens or lentil. In Serbian, word sočivo and in Croatian leća, means both lentil and lens
Douglas Adams: "There is a theory which states that if ever anybody discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another theory which states that this has already happened."

jlowe

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #39 on: November 04, 2007, 08:43:02 pm »
Stepping out on a limb...
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If only time didn't take so long ... we'd be there by now

quarkspin

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Re: Place your lenticular (S0) galaxies in this thread 587739131341963289
« Reply #40 on: November 04, 2007, 11:03:09 pm »
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jlowe

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #41 on: November 05, 2007, 02:36:14 pm »
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 #42 on: November 05, 2007, 02:42:02 pm »
Two birds with one stone I see, jlowe. :o Very nice image.  ;)

EricFDiaz

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #43 on: November 06, 2007, 01:56:33 am »
According to SIMBAD, NGC 5866 (M102)? pictured here, besides morphologically being a lenticular (S0) type galaxy is also an AGN and is classified as a Seyfert Galaxy, and judging by the very bright appearance of it's central bulge, I would say a Seyfert 1 Galaxy.

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jlowe

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Re: Place your lenticular (S0) galaxies in this thread
« Reply #44 on: November 06, 2007, 12:14:24 pm »
Eric, very nice.. I did poke around and found a search at HST shows NED resolves M102 to MESSIER 101. But SEDS Messier 101  doesn't look right either.
Going to SEDS Messier 102, it all becomes clear .. well not really. Seems M102 might be a duplicate of M101, and NGC 5866 is "Perhaps more probably (due to historical evidence) M102..."  .. and I thought all this was 'written in stone'  :D Sure glad that's all clear now!
If only time didn't take so long ... we'd be there by now