VV Cephei Low Resolution

[MARC TRYPSTEEN]

To encourage Low Resolution (LR) registrations of the VV Cephei behavior a didactic presentation of such a spectrum is presented in the attachment. Anyone entering the campaign has a starting point this way.

A reference spectrum of a M2 I type star is superimposed.

Here we can see in the spectral range  5000 – 7000 Å the following spectral lines typical for M2 I stars: Magnesium triplet, Sodium doublet , Fe I lines, Blend with Fe I, Ba I and sporadic Ti.

The Hydrogen alpha line is in absorption on the reference. In contrast to this the Hydrogen alpha line on the recorded spectrum is in emission due to the mass transfer effect – accretion around the B type star. (White line on the recorded spectral strip)

Success!

Clear skies and kind regards,

Marc.

Attachments:

1. 

   VVCEPLRREFLAB.jpg
   

[Michael O’Connell]

That’s interesting Marc. Must give that a go.

[Robin Leadbeater]

There is also a lot of background information and amateur spectra at all resolutions on VV Cep posted on the ARAS forum over the past few years.

http://www.spectro-aras.com/forum/viewforum.php?f=19

Cheers

Robin

[Author]

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