2003MNRAS.346L..21P

Query : 2003MNRAS.346L..21P

2003MNRAS.346L..21P - Mon. Not. R. Astron. Soc., 346, L21-L25 (2003/December-1)

Superhumps, magnetic fields and the mass ratio in AM Canum Venaticorum.

PEARSON K.J.

Abstract (from CDS):

We show that the observed K velocities and periodicities of AM CVn can be reconciled given a mass ratio q ~ 0.22 and a secondary star with a modest magnetic field of surface strength B ∼ 1 T. We see that the new mass ratio implies that the secondary is most likely semidegenerate. The effect of the field on the accretion disc structure is examined. The theory of precessing discs and resonant orbits is generalized to encompass higher order resonances than 3:2 and shown to retain consistency with the new mass ratio.

Abstract Copyright: 2003 RAS

Journal keyword(s): accretion, accretion discs - MHD - methods: N -body simulations - binaries: close - stars: individual: AM CVn - novae, cataclysmic variables

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* U Gem CV* 07 55 05.2323858391 +22 00 05.045435077   15.3 14.54     DA 1101 0
2 V* Z Cha CV* 08 07 27.7517751528 -76 32 00.665029356           M5.5 605 1
3 V* SU UMa CV* 08 12 28.2695986944 +62 36 22.427676396           B2 498 0
4 V* AM CVn CV* 12 34 54.6231062664 +37 37 44.120620056   14.02 14.13 14.47   DBnnp 407 0

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