Bipolar jets growth and decline in Hen 3-1341: a direct link to fast wind and outburst evolution

Details Bipolar jets growth and decline in Hen 3-1341: a direct link to fast wind and outburst evolution Bipolar jets growth and decline in Hen 3-1341: a direct link to fast wind and outburst evolution

2005-02-03

arxiv.org/abs/astro-ph/0502064v1

Mon.Not.Roy.Astron.Soc. 360 (2005) 1257-1261

Astronomy and Astrophysics

Astrophysics

MNRAS, submitted

Scientific paper

10.1111/j.1365-2966.2005.09100.x

The appearance and disappearance of collimated bipolar jets in the symbiotic star Hen 3-1341 is reported and investigated. From modeling of the emission line spectrum it turns out that the accreting white dwarf in quiescence has T_WD ~ 1.2 10(5) K and R_WD ~ 0.14 Rsun, for a luminosity of 3.8 10(3) Lsun, and it is stably burning hydrogen on the surface at a rate of 5 10(-8) Msun/yr, feeding ionizing photons to a radiation bounded circumstellar nebula extending for ~ 17 AU. The WD underwent a multi-maxima outburst lasting from 1998 to 2004 during which its H-burning envelope reacted to a probable small increase in the mass accretion by expanding and cooling to T_eff ~ 1 10(4) K and R ~ 20 Rsun, mimicking an A-type giant that radiated a total of 6 10(44) erg during the outburst, at an average rate of 1 10(3) Lsun. Bipolar jets developed at the time of outburst maximum and their strength declined in parallel with the demise of a fast wind from the WD, finally disappearing when the wind stopped halfway to quiescence, marking a 1:1 correspondence between jets presence and feeding action of the fast wind. The total mass in the jets was M_jet ~ 2.5 10(-7) Msun for a kinetic energy of E_jet ~ 1.7 10(42)/(sin i) erg, corresponding to 0.3/(sin i) percent of the energy radiated during the whole outburst.

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