NGC 7793 with Carbon Stars?

[sjastro]

Probably belongs in the Science or Spectroscopy forum.

A comparison of NGC 7793 in visible and near infrared (NIR).
While the NIR image is relatively featureless compared to the visible image, it does show stars that are bright in NIR. Not sure if these are rare carbon stars or your common garden variety red dwarf.
In any case I think it makes a more interesting image.

It could be a worthwhile challenge to obtain a spectrum of one of these stars for identification.

Each image was composed of 3 hrs of visible and NIR luminance and combined to 1 hr R, G and B colour.

Scope BRC 250, ST-X10ME CCD.

Higher resolution.
http://members.iinet.net.au/~sjastro...ison_Stars.jpg

[Ryderscope (Rodney)]

Thanks for posting an image with an interesting challenge. I am sure there is an answer from the spectroscopy front.

[jase (Jason)]

Impressive comparison Steven. The carbon stars really pop in the NIR data. Thanks for sharing.

[Ross G]

Great capture Steven.

An interesting comparison.

Ross.

[sjastro]

Thanks Rodney, Jase and Ross for your comments.

Regards

Steven

[Elio]

very intresting comparison

[sjastro]

Thank you Elio.

Regards

Steven