Ca II K line in Be star spectra? V403 Pup
Posted: Wed Mar 20, 2019 3:05 am
I saw that V403 Pup didn't have any spectra in the BeSS database, so I observed it. Twice.
First was on Mar 3
I noticed and later identified the Ca II K line at 393.4 nm
I observed it again on Mar 11
The Ca II K line is gone but the He I line at 402.5 nm was much stronger.
In the literature I found references to Ca II emission lines in the IR as an indication of interacting binary Be stars
https://arxiv.org/pdf/1205.2259.pdf
These articles also mention the Ca II K absorption line:
https://arxiv.org/pdf/0711.2085.pdf
https://arxiv.org/pdf/1807.00907.pdf
Could I have caught a companion near periastron passage? Seems kind of lucky to me.
Does anyone know about the prevalence of the Ca II K line in Be star spectra?
First was on Mar 3
- V403 Pup 0303 full spec.png (18.19 KiB) Viewed 3457 times
- V403 Pup 0303 zoom.png (18.94 KiB) Viewed 3457 times
- V403 Pup 0310 full.png (17.15 KiB) Viewed 3457 times
- V403 Pup 0310 zoom.png (16.92 KiB) Viewed 3457 times
https://arxiv.org/pdf/1205.2259.pdf
These articles also mention the Ca II K absorption line:
https://arxiv.org/pdf/0711.2085.pdf
https://arxiv.org/pdf/1807.00907.pdf
Could I have caught a companion near periastron passage? Seems kind of lucky to me.
Does anyone know about the prevalence of the Ca II K line in Be star spectra?