Peas Project

[zookeeperKevin]

Hey all, Carie and I (well, mostly Carie!) are working hard on analysing the peas. They're definitely very interesting, perhaps extraordinary objects. I don't want to say much more right now because many things are still not certain, and because Carie should tell you about it.

I have seen a draft paper slowly taking shape though.... 

[Hanny]

Ooh thanks Kevin!

[guibka]

Hello Kevin Schawinski!
Here is a green pea!
Galaxy 588007005778411734
http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=588007005778411734
Z=0.227, OIII is very bright.
Bye!
Fab.

[Rick Nowell]

Yes, http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=588007005778411734 is a Pea, but it has already been found.
Keep trying! You can check against this list below if you like, especially now there are more candidates with SDSS DR7.
http://www.galaxyzooforum.org/index.php?topic=270747.0

[dosey]

Are you still collecting PEAS? I have seen a very green fuzzy blob that I would have called a star except it was fuzzy.                     The number is 587732153639829774   I haven't worked out how to post a picture of it yet, but not for want of trying.

[waveney]

Are you still collecting PEAS? I have seen a very green fuzzy blob that I would have called a star except it was fuzzy.                     The number is 587732153639829774   I haven't worked out how to post a picture of it yet, but not for want of trying.

Yes we are collecting them, yes it is a Pea, It has already been collected though.  To report peas, please use the sister topic Give Peas a Chance

[dosey]

Thanks Waveney, for the quick reply. I am sorry to bother you with an already collected Pea but I really will work out how to check things out better soon! I think it is that I see something different and don't know which cage it belongs to at the moment, hopefully with time I'll get better but do enjoy the project so much I will stick with it. dosey

[zookeeperKevin]

We're not actively collecting them anymore right now. You're of course welcome to keep posting them and discuss them, but Carie has a very good set that she's analysing. We can't keep adding any more to that set, as she'd have to start all over again for each new pea. Processing their spectra in particular is a very time-consuming task.

[sepos]

We're not actively collecting them anymore right now. You're of course welcome to keep posting them and discuss them, but Carie has a very good set that she's analysing. We can't keep adding any more to that set, as she'd have to start all over again for each new pea. Processing their spectra in particular is a very time-consuming task.

Hi Kevin,

just curious to know, if there are any findings you or Carie could disclose yet? 

[ccardamone]

We're not actively collecting them anymore right now. You're of course welcome to keep posting them and discuss them, but Carie has a very good set that she's analysing. We can't keep adding any more to that set, as she'd have to start all over again for each new pea. Processing their spectra in particular is a very time-consuming task.

Hi Kevin,

just curious to know, if there are any findings you or Carie could disclose yet? 

How about a picture!  I've attached 2 images from HST on the left(on the top is one of the star forming Peas and on the bottom an AGN) and on the right are the sloan images - sorry no color here, just for comparison to HST.  But you can see how they look small and round in the SDSS images, but in HST - the top one looks like 2 merging systems and the bottom looks like a spiral!

We're working on an HST proposal to get more information like this.

[ccardamone]

The total number of Peas by the 'improved Query', using DR7 is 300.  Most of them are pretty faint, so the spectra are giving me some troubles.  I have 'fits' for 50 of them.  That may be all we're able to get, but I'll look into it some more.

Does this mean that you have 50 galaxies out of 300 that you are using in your paper as examples of whatever they are examples of?

yep, except I've up'd the number to 135 now.  As we get a better idea about their nature and the paper takes its final shape I promise to post much more

[ccardamone]

So what is special about peas galaxies? What caught your attention about them? Obviously they have certain shared features, but what does it mean and why is it important?

Forgive me for asking, but I really don't know that much about this, and a quick google search didn't really help me.

hey, this is a really critical questions to ask - so no apologies!

Why were they exciting in the beginning?
Well we know most galaxies look like blue patchy spiraling things that form lots of stars or like big red smooth balls that are done forming their stars.  We've built our understanding of how galaxies form and evolve in the universe to meet these observations.  When we see something new and weird, we want to understand can this tell us something new about these processes! 
I'm hoping the peas will do just that.
But I'll let you know when the verdict is in

[Rick Nowell]

Pictures of SDSS_HST Comparison and then SDSS Explorer. Not sure about orientation.



SHOC 026   http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=587724199349387411
posted by laihro and myself at various points.
http://www.journals.uchicago.edu/doi/abs/10.1086/421519
"Strong Emission Line HII Galaxies in the Sloan Digital Sky Survey. Catalog of DR1 Objects with Oxygen Abundances."
Alexei Y. Kniazev, Simon A. Pustilnik et al.



z=0.283

[r0land]

One more
http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=587739608096309397

[Epsilon Lyrae]

http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=587739652107600089