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arXiv · 2206.10483

The common envelope origins of the fast jet in the planetary nebula M 3-38

J. S. Rechy-García·J. A. Toalá·M. A. Guerrero·C. Rodríguez-López·L. Sabin·G. Ramos-Larios
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Abstract

We present the analysis of Multi-Espectr\'ografo en GTC de Alta Resoluci\'on para Astronom\'ia (MEGARA) high-dispersion integral field spectroscopic observations of the bipolar planetary nebula (PN) M 3-38. These observations unveil the presence of a fast outflow aligned with the symmetry axis of M 3-38 that expands with a velocity up to $\pm$225 km s$^{-1}$. The deprojected space velocity of this feature can be estimated to be $\approx$320$^{+130}_{-60}$ km s$^{-1}$, which together with its highly collimated morphology suggests that it is one of the fastest jet detected in a PN. We have also used Kepler observations of the central star of M 3-38 to unveil variability associated with a dominant period of 17.7 days. We attribute this to the presence of a low-mass star with an orbital separation of $\approx$0.12-0.16 au. The fast and collimated ejection and the close binary system point towards a common envelope formation scenario for M 3-38.

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J. S. Rechy-García, J. A. Toalá, M. A. Guerrero, C. Rodríguez-López, L. Sabin, G. Ramos-Larios. 2022-06-21. The common envelope origins of the fast jet in the planetary nebula M 3-38. https://doi.org/10.3847/2041-8213%2Fac78dc

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