› Forums › Variable Stars › RW Cephei great dimming › Reply To: RW Cephei great dimming
![](https://britastro.org/wp-content/uploads/2016/11/picture-146-1478110706-80x80.jpg)
Here is a spectrum tonight (R=1000 using an ALPY 600 with a narrower than usual 10um slit)
https://britastro.org/specdb/data_graph.php?obs_id=13110
It is very red but clearly heavily reddened by interstellar or circumstellar dust
VSX suggests a very wide range of spectrum classifications ranging from G to M2 but Keenan suggests K2i in his 1989 catalogue.
https://articles.adsabs.harvard.edu/pdf/1989ApJS…71..245K
Using the B,V brightness values in SIMBAD, this would imply for a K2i star an E(B-V) = 0.99. Dereddening my spectrum by this amount indeed gives a good match to the Pickles standard for K2i both in terms of the continuum shape and more importantly in the spectral line details (My spectrum is a slightly higher resolution which would explain the higher apparent intensity of the lines in my spectrum)
https://britastro.org/specdb/view_image.php?obs_id=13110
Cheers
Robin
EDIT- trying to get the link working.. and failing 🙁 cut and paste it if you need to
-
This reply was modified 1 year, 8 months ago by
Robin Leadbeater.
-
This reply was modified 1 year, 8 months ago by
Robin Leadbeater.
-
This reply was modified 1 year, 8 months ago by
Robin Leadbeater.
-
This reply was modified 1 year, 8 months ago by
Robin Leadbeater.