[vsnet-chat 3359] rere vsnet-rcb 13 & U Cyg

["Dahm, Michael" <marvin.siriuscorp@planet-interkom.de>]

U Cygni and RCBs

Qustions :
Does anyone know of either i) an RCB star that still manages to show
periodic pulsation of undiminished amplitude during obscuration events,
or ii) an eclipsing Mira?

i) Hoffmeister/Richter/Wenzel : Veraenderliche Sterne, J.A. Barth, Leipzig,
1990 reported about the RCB star S Aps which is pulsating in minimum with
the same period and a "greater" amplitude of 1,5 mag. In most cases
irregularities of production and destruction of carbon dust hide the
pulsation in deep minima but this should be not the case in an amplitude of
a few tenth of magnitude.

ii) Miras are known as member of eclipsing binaries. Because of their big
size they eclipse another star and are not eclipsed (of course they are but
the amplitude is undectable small). This is to my knowledge the case in some
symbiotic binaries.

Michael Dahm
Email : RRLyrae@planet-interkom.de
Homepage : www.planet-interkom.de/marvin.siriuscorp/

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp