Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-03-07
Astrophys.J. 623 (2005) 398-410
Astronomy and Astrophysics
Astrophysics
Accepted for publication in ApJ - 04/2005. Complete grid results (Tables 2+3) data available at: http://geophysics.tau.ac.il/p
Scientific paper
10.1086/428435
This paper is a sequel to an earlier paper devoted to multiple, multicycle nova evolution models (Prialnik & Kovetz 1995, first paper of the series), which showed that the different characteristics of nova outbursts can be reproduced by varying the values of three basic and independent parameters: the white dwarf mass-M_{WD}, the temperature of its isothermal core-T_{WD} and the mass transfer rate-Mdot. Apart from being the largest computational classical novae parameter-space survey, we show here that the parameter space is constrained by several analytical considerations and find its limiting surfaces. Consequently, we extend the grid of multicycle nova evolution models presented in Paper I almost to its limits, adding multicycle nova outburst calculations for a considerable number of new parameter combinations. In particular, the extended parameter pace that produces nova eruptions includes low mass transfer rates down to 5e-13 Msun/yr, and more models for low T_{WD}. Resulting characteristics of these runs are added to the former parameter combination results, to provide a full grid spanning the entire parameter space for Carbon-Oxygen white dwarfs. The full grid covers the entire range of observed nova characteristics, even those of peculiar objects, which have not been numerically reproduced until now. Most remarkably, runs for very low Mdot lead to very high values for some characteristics, such as outburst amplitude A>~20, high super-Eddington luminosities at maximum, heavy element abundance of the ejecta Z_{ej}~0.63 and high ejected masses m_{ej}~7e-4 Msun.
Kovetz Attay
Prialnik Dina
Shara Michael M.
Yaron Ofer
No associations
LandOfFree
An Extended Grid of Nova Models: II. The Parameter Space of Nova Outbursts does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with An Extended Grid of Nova Models: II. The Parameter Space of Nova Outbursts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An Extended Grid of Nova Models: II. The Parameter Space of Nova Outbursts will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-557748