1994A&A...290..473L


Query : 1994A&A...290..473L

1994A&A...290..473L - Astronomy and Astrophysics, volume 290473-486 (1994/10-2)

Systematics of dwarf nova outbursts: a parameter study in the framework of the disk-instability model.

LUDWIG K., MEYER-HOFMEISTER E. and RITTER H.

Abstract (from CDS):

We investigate how the observed features of dwarf nova outbursts in different systems can be described by the disk instability model using the same α parametrization for all systems. We take the two-alpha description, introducing αcold and αhot for the accretion disk viscosity in the cold and the hot state. The present numerical investigation includes three parts: (1) vertical structure computations for different values of α, mass of central star, mixing length parameter, (2) determination of the transition front velocities for the parameters chosen, (3) computation of the disk evolution during outburst cycles for comparison with observations of VW Hydri, U Geminorum and SS Cygni (with a detailed investigation of the difficulties to model the observations). In addition an analytical description of the outburst behaviour is given.
Result. for duration of quiescence and of outburst stages are compared with data of some well observed dwarf nova systems.

Abstract Copyright: ∼

Journal keyword(s): accretion disks - cataclysmic variables - stars: individual: VW Hydri - instabilities

Simbad objects: 6

goto View the references in ADS

Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 V* VW Hyi CV* 04 09 11.3967378648 -71 17 41.554528260   12.786 12.543 14.160   DQ 661 0
2 V* U Gem CV* 07 55 05.2324414746 +22 00 05.044127985   15.3 14.54     DA 1135 0
3 V* Z Cha CV* 08 07 27.7517751528 -76 32 00.665029356           M5.5 620 1
4 V* Z Cam CV* 08 25 13.1986690656 +73 06 39.284964108   12.006 11.927 11.712   ~ 554 0
5 V* OY Car CV* 10 06 22.0793274312 -70 14 04.584660540           ~ 586 0
6 V* SS Cyg CV* 21 42 42.8034497592 +43 35 09.867842484 11.07 12.651 12.032 9.326   K5V 1324 1

To bookmark this query, right click on this link: simbad:objects in 1994A&A...290..473L and select 'bookmark this link' or equivalent in the popup menu