Hα Observations of the Binary System VV Cephei Ernst Pollmann

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Presentation transcript:

Hα Observations of the Binary System VV Cephei Ernst Pollmann ASPA Active Spectroscopy in Astronomy

VV Cephei 4,9 mag µ Cephei 4,0 mag 3 VV Cephei 4,9 mag µ Cephei 4,0 mag 1

1a

M2Iab Supergiant 2-3 Solar masses 1600 Solar radii The orbit of the Be-star + Gasdisk leads to the eclipse by the M-type star Duration of eclipse: 673 days Periode: 20,4 years M2Iab Supergiant 2-3 Solar masses 1600 Solar radii Last eclipse: Jun/1996 – August/1998 2

Rotating Hydrogen-Gasdisk and its hot Be-Star with 8 Solarmasses blue shiftet red shiftet Observer 3

4

5

Time behavior of the Hα-emission since 1996 until today Eclipse 1997-99 6

V/R of the Hα-emission as function of orbital phase 7

Periastron passage 8 08/199401/2015 09/1999 09/2003 11/2009 10/2004 11/2005 8

Increase of the emission strength by mass overflow into the Be-disk at periastron 9

thanks for attention 14

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