Disk mass and Halpha EW of zeta Tau

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Ernst Pollmann
Posts: 461
Joined: Mon Sep 26, 2011 7:16 pm

Disk mass and Halpha EW of zeta Tau

Post by Ernst Pollmann »

I guess that the majority of the ARAS observers knows the ARAS long-term Halpha monitoring of zeta Tau (http://astrospectroscopy.de/media/files/IBVS-5813.pdf)
Several days ago I got the poster "The Variable and Asymmetric Disk of zeta Tau", presented by Christopher Tycner (Central Michigan University, Mount Pleasant, MI, United States) & Aaron Sigut (The University of Western Ontario, London, ON, Canada) at the IAU meeting last year (http://adsabs.harvard.edu/abs/2015IAUGA..2255073T)
That poster shows among others long-baseline interferometric observations in the optical part of the spectrum of zeta Tau in order to complement spectroscopic observations. Fig. 4 of the poster shows the (interferometric) total disk mass as a function of time since Dec 3, 2003 based on the Halpha emission profile fits.
That Fig. offers an excellent opportunity, to compare our Halpha long-term monitoring for the same time section (see the attached Fig.). We can recognize that the disk mass correlates with the Halpha EW. This is not surprising, because the disk contains mostly ionized hydrogen, which is responsible for the line emission, but a wonderful confirmation of our work, which has been complemented by other methods of the professional astronomy. I try to stay in contact with the researchers.

Ernst Pollmann
Halpha-EW v. Diskmass.png
Halpha-EW v. Diskmass.png (110.36 KiB) Viewed 5570 times
Ernst Pollmann
Posts: 461
Joined: Mon Sep 26, 2011 7:16 pm

Re: Disk mass and Halpha EW of zeta Tau

Post by Ernst Pollmann »

Dear colleagues,
an observation report of our zeta Tau Halpha profile monitoring is to find at:
http://astrospectroscopy.de/media/files ... report.pdf
Comments are welcome!

Ernst Pollmann
Ernst Pollmann
Posts: 461
Joined: Mon Sep 26, 2011 7:16 pm

Mass & precession of the disk in zeta Tau

Post by Ernst Pollmann »

New investigation:
"Mass & precession of the Disk in zeta Tau"
see the following link:
http://astrospectroscopy.de/media/files ... ---Tau.pdf

Ernst Pollmann
Last edited by Ernst Pollmann on Fri Jul 07, 2017 5:58 pm, edited 1 time in total.
Ernst Pollmann
Posts: 461
Joined: Mon Sep 26, 2011 7:16 pm

Re: Disk mass and Halpha EW of zeta Tau

Post by Ernst Pollmann »

Dear colleagues,
for those, who have difficulties to imagine the process of disk-nodding and disk-precession in zeta Tau, here a link to an animation:
http://astrospectroscopy.de/media/files ... g_slow.AVI

Arranged from: Schaefer et al., The astron. Journal, 140, 1838-1849, 2010

Ernst Pollmann
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