Bibcode
Rodríguez-Gil, Pablo; Martínez-Pais, Ignacio G.
Bibliographical reference
CLASSICAL NOVA EXPLOSIONS: International Conference on Classical Nova Explosions. AIP Conference Proceedings, Volume 637, pp. 558-561 (2002).
Advertised on:
11
2002
Citations
1
Refereed citations
0
Description
We present high time resolution spectroscopy of the non-eclipsing old
nova V533 Herculis (N Her 1963). It is the second nova remnant affected
by the `SW Sex syndrome'. A modulation of the equivalent width of the
emission lines with a period of 23.33 min has been detected. This,
together with the strong He II λ4686 emission characteristic of
magnetic systems, leads us to link this period to the spin of a magnetic
white dwarf. Similar flaring activity has been recorded in other SW Sex
stars, namely, the old nova BT Mon, LS Peg and DW UMa, supporting the
idea of these systems being magnetic accretors. Stationary emission
features are also observed in the Balmer lines, which we attribute to
the ejected nova shell.