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Spectrum of M87 Nucleus

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Robin Leadbeater's picture
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Spectrum of M87 Nucleus

Since M87 has been in the news recently with the radio image of the region immediately surrounding the black hole, I thought I would take a spectrum of this region using the ALPY600.

https://britastro.org/node/17807

Cheers

Robin

John Coffin's picture
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Thanks

Thanks for sharing that. Can you add any links to the radio image?

Robin Leadbeater's picture
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References added

Hi John, 

I have added links to the AAS article on the radio image (just 50 micro arcsec across !) and the source of the 2008 comparison professional spectrum.

Cheers

Robin

Andy Wilson's picture
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Fascinating

Fascinating spectrum Robin! A good demonstration that the emission lines are generated in the central region of the galaxy.

Cheers

Andy

Robin Leadbeater's picture
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emission region

Thanks Andy,

I wonder how compact the emission line source is compared to the region shown in the radio image. (unfortunately the spectrum was not very well focused at H alpha so the extent is not clear in my spectrum)

Robin

EDIT this image and spectra from HST suggests the main emission region region extends around 1 arcsec or so across

http://www.rpi.edu/dept/phys/courses/79205/Pics/HST95/diskM87Data.gif

Andy Wilson's picture
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Emission Region Size

I think that would make the emission region about 250 light years across, assuming a distance of 55 million light years.

Andy

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Robin,

Robin,

Good work, so nice to see such detailed spectra and information.

Regards,

Jack

Essex UK