Where to find spectroscopc data for galaxies.

[SteveBz]

Hi Astronomers,

Does anyone know where I can find the spectroscopic data for galaxy rotation curves for M31, M81 and M109 (and maybe others).  There are plenty of curves that can be cut and paste, but actually, I'd like to regenerate them.  Like these:

M81

M109

M31

But without all the other lines.  I had hoped that places like Simbad might have them, but I can't really work out how to use it.

Kind regards,

Steve.

[pipnina]

You can find various scientific data sets here in the MAST portal. The only problem I have found is that I often don't know the file types provided for more specialist data or how to use it, but you may have more success if you know what you're looking for!

Hope this helps!

https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html

[robin_astro]

NED has spectra for galaxies but generally just taken at specific locations. 

https://ned.ipac.caltech.edu/

For velocity curves, I suspect you will need to dig deeper into the literature though. I think most of these are done at radio wavelengths where the Hydrogen line can be detected out to larger distances 

Cheers

Robin