broad emission at base of P Cygni lines

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Robin Leadbeater
Posts: 1926
Joined: Mon Sep 26, 2011 4:41 pm
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broad emission at base of P Cygni lines

Post by Robin Leadbeater »

Does anyone know the astrophysical explanation for the broad emission seen at the base of the P Cygni lines as seen here for example ?
PCyg_broad emission.png
https://britastro.org/specdb/data_graph ... s_id=11488

(If it is doppler related the velocities are much higher than that measured from the P Cygni line absorption)

Thanks
Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Christophe Boussin
Posts: 170
Joined: Sun Aug 21, 2016 6:04 pm

Re: broad emission at base of P Cygni lines

Post by Christophe Boussin »

Hi Robin,

I found this very interesting publication (in free access) :

P Cygni profiles atop broad emission lines 
Roberto Cid Fernandes, Jr
Monthly Notices of the Royal Astronomical Society, Volume 305, Issue 3, May 1999, Pages 602–614,

https://doi.org/10.1046/j.1365-8711.1999.02466.x

Spectroscopically,

Christophe
CBO (Newton 200 F/5 / Alpy600 / Atik 314L+ / Atik Titan + Mewlon 180 F/12 / LHIRES III 2400 / Atik 460EX / Atik 314 L+) @ ARAS database
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