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• W4229446897 endingPage "761" @default.
• W4229446897 startingPage "744" @default.
• W4229446897 abstract "We analyze the physical conditions and chemical composition of the photoionized Herbig-Haro object HH~514, which emerges from the proplyd 170-337 in the core of the Orion Nebula. We use high-spectral resolution spectroscopy from UVES at the Very Large Telescope and IFU-spectra from MEGARA at the Gran Telescopio de Canarias. We observe two components of HH~514, the jet base and a knot, with $n_{rm e}= (2.3 pm 0.1) times 10^5 text{cm}^{-3}$ and $n_{rm e}= (7 pm 1) times 10^4 text{cm}^{-3}$, respectively, both with $T_{rm e}approx 9000 text{ K}$. We show that the chemical composition of HH~514 is consistent with that of the Orion Nebula, except for Fe, Ni and S, which show higher abundances. The enhanced abundances of Fe and Ni observed in HH objects compared with the general interstellar medium is usually interpreted as destruction of dust grains. The observed sulphur overabundance (more than two times solar) is challenging to explain since the proplyd photoevaporation flow from the same disk shows normal sulphur abundance. If the aforementioned S-overabundance is due to dust destruction, the formation of sulfides and/or other S-bearing dust reservoirs may be linked to planet formation processes in protoplanetary disks, which filter large sulfide dust grains during the accretion of matter from the disk to the central star. We also show that published kinematics of molecular emission close to the central star are not consistent with either a disk perpendicular to the optical jet, nor with an outflow that is aligned with it." @default.
• W4229446897 created "2022-05-11" @default.
• W4229446897 creator A5011894065 @default.
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• W4229446897 date "2022-05-12" @default.
• W4229446897 modified "2023-10-14" @default.
• W4229446897 title "Photoionized Herbig–Haro objects in the Orion Nebula through deep high-spectral resolution spectroscopy – III. HH 514" @default.
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• W4229446897 doi "https://doi.org/10.1093/mnras/stac1300" @default.
• W4229446897 hasPublicationYear "2022" @default.
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