dc.creator | Skopal, A. | |
dc.creator | Shugarov, S. Y. | |
dc.creator | Munari, U. | |
dc.creator | Masetti, N. | |
dc.creator | Marchesini, Ezequiel Joaquín | |
dc.creator | Komzík, R. M. | |
dc.creator | Kundra, E. | |
dc.creator | Shagatova, N. | |
dc.creator | Tarasova, T. N. | |
dc.creator | Buil, C. | |
dc.creator | Boussin, C. | |
dc.creator | Shenavrin, V. I. | |
dc.creator | Hambsch, F. J. | |
dc.creator | Dallaporta, S. | |
dc.creator | Frigolé, Cecilia Andrea | |
dc.creator | Gardey, Juan Cruz | |
dc.creator | Zubareva, A. | |
dc.creator | Dubovský, P. A. | |
dc.creator | Kroll, P. | |
dc.date.accessioned | 2021-11-04T11:56:15Z | |
dc.date.accessioned | 2022-10-14T21:33:35Z | |
dc.date.available | 2021-11-04T11:56:15Z | |
dc.date.available | 2022-10-14T21:33:35Z | |
dc.date.created | 2021-11-04T11:56:15Z | |
dc.date.issued | 2020-04 | |
dc.identifier | Skopal, A.; Shugarov, S. Y.; Munari, U.; Masetti, N.; Marchesini, Ezequiel Joaquín; et al.; The path to Z And-type outbursts: The case of V426 Sagittae (HBHA 1704-05); EDP Sciences; Astronomy and Astrophysics; 636; A77; 4-2020; 1-18 | |
dc.identifier | 0004-6361 | |
dc.identifier | http://hdl.handle.net/11336/145944 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4309129 | |
dc.description.abstract | Context. The star V426 Sge (HBHA 1704-05), originally classified as an emission-line object and a semi-regular variable, brightened at the beginning of August 2018, showing signatures of a symbiotic star outburst. Aims. We aim to confirm the nature of V426 Sge as a classical symbiotic star, determine the photometric ephemeris of the light minima, and suggest the path from its 1968 symbiotic nova outburst to the following 2018 Z And-type outburst. Methods. We re-constructed an historical light curve (LC) of V426 Sge from approximately the year 1900, and used original low- (R ∼ 500-1500; 330-880 nm) and high-resolution (R ∼ 11 000-34 000; 360-760 nm) spectroscopy complemented with Swift-XRT and UVOT, optical UBVRCIC and near-infrared JHKL photometry obtained during the 2018 outburst and the following quiescence. Results. The historical LC reveals no symbiotic-like activity from ∼1900 to 1967. In 1968, V426 Sge experienced a symbiotic nova outburst that ceased around 1990. From approximately 1972, a wave-like orbitally related variation with a period of 493.4 ± 0.7 days developed in the LC. This was interrupted by a Z And-type outburst from the beginning of August 2018 to the middle of February 2019. At the maximum of the 2018 outburst, the burning white dwarf (WD) increased its temperature to ? 2 × 105 K, generated a luminosity of ∼7 × 1037 (d/3.3 kpc)2 erg s-1 and blew a wind at the rate of ∼3 × 10-6 M yr-1. Our spectral energy distribution models from the current quiescent phase reveal that the donor is a normal M4-5 III giant characterised with Teff ∼ 3400 K, RG ∼ 106 (d/3.3 kpc) R and LG ∼ 1350 (d/3.3 kpc)2 L and the accretor is a low-mass ∼0.5 M WD. Conclusions. During the transition from the symbiotic nova outburst to the quiescent phase, a pronounced sinusoidal variation along the orbit develops in the LC of most symbiotic novae. The following eventual outburst is of Z And-type, when the accretion by the WD temporarily exceeds the upper limit of the stable burning. At this point the system becomes a classical symbiotic star. | |
dc.language | eng | |
dc.publisher | EDP Sciences | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201937199 | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2020/04/aa37199-19/aa37199-19.html | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.subject | BINARIES: SYMBIOTIC | |
dc.subject | CATACLYSMIC VARIABLES | |
dc.subject | NOVAE | |
dc.subject | STARS: INDIVIDUAL: V426 SAGITTAE (HBHA 1704-05) | |
dc.title | The path to Z And-type outbursts: The case of V426 Sagittae (HBHA 1704-05) | |
dc.type | info:eu-repo/semantics/article | |
dc.type | info:ar-repo/semantics/artículo | |
dc.type | info:eu-repo/semantics/publishedVersion | |