Blue Stragglers in Omega Centauri

SkyViking (Rolf) · #1 06-02-2010, 10:41 PM

I realised I hadn't done a shot of Omega Centauri for several years, so I decided to image it the other day. In this image I have focused on bringing out the different colours of the stars in this massive globular.
Visible is a large amount of 'blue stragglers', stars that are too hot and massive for the cluster's otherwise old age.
Given the ancient origin of the cluster these stars should have turned into red giants by now but it has been proposed that they are the results of mergers and mass transfers in the crowded environment of globular clusters. A main sequence star can exist for billions of years in the cluster and then later gain mass from a close orbiting binary, or as a result of a collision/merger, and thereby become more massive and hotter so that it now appears as a blue giant.

The image is a 2x2 mosaic of 100 x 7s taken with ToUCam Pro SC1 and 10" Newton with no filters.

Hope you enjoy

Regards,
Rolf

[1ponders] (Paul) · #2 06-02-2010, 11:31 PM

Ya gotta love a ToUcam!!! Fantastic Rolf.

Exfso (Peter) · #3 07-02-2010, 01:55 AM

I do the long exposure mods for the 900C here in Aust, and now I know why poeple want it done. That is damn nice.

multiweb (Marc) · #4 07-02-2010, 09:19 AM

Wow! Great shot. Awesome resolution.

Lester · #5 07-02-2010, 09:24 AM

Very nice image Rolf.

SkyViking (Rolf) · #6 07-02-2010, 08:42 PM

Quote:

Originally Posted by [1ponders]

Ya gotta love a ToUcam!!! Fantastic Rolf.

Thanks Paul, I'm quite pleased with it too.

Quote:

Originally Posted by Exfso

I do the long exposure mods for the 900C here in Aust, and now I know why poeple want it done. That is damn nice.

Thank you Peter. I did the LX mod back in 2003, it was quite tricky soldering the little pins but certainly worth it. I also run the cam in RAW mode, which gives a bit better resolution.

Quote:

Originally Posted by multiweb

Wow! Great shot. Awesome resolution.

Thanks Marc, I actually tried with the 5x powermate also but the stars are just too faint for that

Quote:

Originally Posted by Lester

Very nice image Rolf.

Thank you Lester.

seeker372011 (Narayan) · #7 07-02-2010, 09:02 PM

thats very well done indeed with a ToU cam

Tom Davis (Tom) · #8 08-02-2010, 02:08 AM

Really excellent image!

Tom

SkyViking (Rolf) · #9 10-02-2010, 01:44 PM

Quote:

Originally Posted by seeker372011

thats very well done indeed with a ToU cam

Quote:

Originally Posted by Tom Davis

Really excellent image!

Tom

Thanks both of you

Hagar (Doug) · #10 10-02-2010, 08:59 PM

Great image Rolf. I cant believe the quality of image you get with the Tucam.

Well done.