| PROPOSAL OVERVIEW | |
| Proposal Title | Investigating the vertical structure of the accretion disc wind in Hercules X-1 |
| Proposal Category | White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, ULXs and Black Holes |
| Proposal Type | LARGE PROGRAM |
| Proposal Id | 86544 |
| Number of Observations | 3 |
| Total exposure time (ks) | 405 |
| PI DETAILS | |
| PI | Mr Peter Kosec |
| Institute | Institute of Astronomy |
| Country | UNITED KINGDOM |
| CO-INVESTIGATORS | ||
| Name | Country | |
| A. Fabian | UNITED KINGDOM | |
| D. Walton | UNITED KINGDOM | |
| C. Pinto | NETHERLANDS | |
| F. Fuerst | SPAIN | |
| R. Ballhausen | GERMANY | |
| S. Dyda | UNITED KINGDOM | |
| I. Psaradaki | NETHERLANDS | |
| J. Wilms | GERMANY | |
| C. Reynolds | UNITED KINGDOM | |
| ABSTRACT | |
| Accretion disc winds in X-ray binaries are not spherically symmetric structures, but their solid angle is difficult to determine because we usually only sample specific lines of sight. We can overcome this problem by studying Hercules X-1, a binary with a precessing warped disc. Its disc wind is strongly varying within a precession cycle, indicating a small wind launching angle and strong vertical stratification. However, the available data originate from many precession cycles and could be plagued by long-term variability effects. With this proposal, we aim to finely sample the wind vertical structure within a single precession cycle, free of any long term deviations, to understand the wind launching angle, launching mechanism and to measure accurately the mass outflow rate. | |
| PAPERS |
| - CLASS 1: | papers that present specific XMM-Newton observations |
| - CLASS 2: | papers that refer to published XMM-Newton results with complementary observations, follow-up analysis, or theoretical analysis |
| - CLASS 3: | further deliveries which resulted from the program and which are made available to the community (e.g. source catalogues, processed images or spectra in public data base) |
| - CLASS 4: | comments and suggestions from PI |
| CLASS 1 (2 references) |
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