The 1989 and 2015 outbursts of V404 Cygni: a global study of wind-related optical features

0496056 - ASÚ 2019 RIV GB eng J - Journal Article
Mata Sánchez, D. - Munoz-Darias, T. - Casares, J. - Armas Padilla, M. - Fernández-Ontiveros, J.A. - Jiménez-Ibarra, F. - Jonker, P.G. - Linares, M. - Torres, M.A.P. - Shaw, A. W. - Rodríguez-Gil, P. - van Grunsven, T. - Blay, P. - Caballero-García, María Dolores - Castro-Tirado, A.J. - Chinchilla, P. - Farina, C. - Ferragamo, A. - Lopez-Martinez, F. - Rubino-Martin, J.A. - Suárez-Andrés, L.
The 1989 and 2015 outbursts of V404 Cygni: a global study of wind-related optical features.
Monthly Notices of the Royal Astronomical Society. Roč. 481, č. 2 (2018), s. 2646-2665. ISSN 0035-8711. E-ISSN 1365-2966
Institutional support: RVO:67985815
Keywords : accretion discs * outflows * X-rays
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.231, year: 2018

We present a data base consisting of 651 optical spectra obtained during this event, that we combine with 58 spectra gathered during the fainter December 2015 sequel outburst, as well as with 57 spectra from the 1989 event. we build diagnostic diagrams that enable us to study the evolution of typical emission line parameters, such as line fluxes and equivalent widths, and develop a technique to systematically detect outflow signatures. We find that these are present throughout the outburst, even at very low optical fluxes, and that both types of outflow features are observed simultaneously in some spectra, confirming the idea of a common origin.
Permanent Link: http://hdl.handle.net/11104/0288930