Modelling the recurrent nova CI Aql in quiescence

Free access article

Issue		A&A Volume 397, Number 3, January III 2003


Page(s)		951 - 959
Section		Stellar atmospheres
DOI		http://dx.doi.org/10.1051/0004-6361:20021539

A&A 397, 951-959 (2003)
DOI: 10.1051/0004-6361:20021539

Modelling the recurrent nova CI Aql in quiescence

C. Lederle and S. Kimeswenger

Institut für Astrophysik der Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
(Received 16 August 2002 / Accepted 30 September 2002)

Abstract
We present detailed photometric investigations of the recurrent nova CI Aql. New data obtained after the 2000 outburst are used to derive a 3D geometrical model of the system. The resulting light curves clearly indicate the existence of an asymmetric spray around the accretion disk, as claimed in the past e.g. for the super-soft X-ray source CAL87 in the LMC. The simulated light curves give us the mass transfer rates varying from $\dot M \approx 2.5 \times 10^{-8}\,\,{M}_\odot\,{\rm yr}^{-1}$ in 1991-1996 to $5.5 \times 10^{-8} < \dot M < 1.5 \times 10^{-7}\,\,{M}_\odot\,{\rm yr}^{-1}$ in 2001/2002. The distance and the interstellar foreground extinction resulting from the model are 1.55 kpc and $E_{B-V} = 0\fm98$ respectively. During fast photometry sequences in 2002 short timescale variations ( $t_{\rm F} \approx 13$ min) of the mass loss are found. Moreover a change in the orbital period of the system is detectable and results in a mass loss of $2.2 \times 10^{-6} < \Delta M < 5.7 \times 10^{-6}\,\,{M}_\odot$ during the nova explosion.

Key words: stars: individual: CI Aql -- stars: novae, cataclysmic variables -- accretion, accretion disks -- binaries: eclipsing

Offprint request: S. Kimeswenger, stefan.kimeswenger@uibk.ac.at

SIMBAD Objects

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.