"Bernd Hanisch" <bernd.hanisch1@gmx.de> schrieb:
Hallo Hugo,
tolle Spektren! War die zentrale Absorption bei Zeta Tau im vergangenen Jahr auch schon so stark, dass sie bis unter das Kontunuum ging? Ich habe das so nicht in Erinnerung.
... hallo Bernd,
in deinen Zeilen hast du zwar Hugo angesprochen, doch möchte ich dir gerne in diesem Zusammenhang meine Korrespondenz mit unserem Freund und Kollegen Th. Rivinius vom Paranal nicht vorenthalten.
In Anlehnung an mein Spektrum (siehe Anhang) stellte ich Thomas folgende Frage:
-------------------------------------
Zitat:
Dear colleagues!
My last spectrum (2008/12/13) of zeta Tau shows, that the Halpha
emission is in a shell phase.
Because this spectrum shape is rather seldom, I would like ask you
whether you can confirm that.
-------------------------------------My last spectrum (2008/12/13) of zeta Tau shows, that the Halpha
emission is in a shell phase.
Because this spectrum shape is rather seldom, I would like ask you
whether you can confirm that.
hier seine Antwort:
----------------------------
That is almost exactly the expected behaviour judged from the previous
Zitat:
Zitat:
four or five V/R cycles, both in RV, and V/R. The central depression is
below unity, and I might have expected that inly in two or three more
month but in general it fits the picture from previous events like a
clockwork.
In the course of the V/R cycle, there is always such a phase in zeta Tau when below unity, and I might have expected that inly in two or three more
month but in general it fits the picture from previous events like a
clockwork.
changing from V>R to R>V around the moment of V=R. It might be brief, and
therefore in a sense "rare", but it is always there. Zeta Tau is always a
shell star if you take a look at metallic lines.
Beste Grüße,
Ernst
PS:
noch eine Frage:
wie stehst du zu meinem PCyg-Kommentar, den ich dir vor Tagen geschickt hatte?
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