PENELLOPE VI. – Searching the PENELLOPE/UVES sample with spectro-astrometry: Two new microjets of Sz 103 and XX Cha
arxiv(2024)
摘要
The main goal of this study is to screen the PENELLOPE/UVES targets for
outflow activity and find microjets via spectro-astrometry in, e.g., the
[OI]λ6300 line. In total, 34 T Tauri stars of the PENELLOPE survey
have been observed with the high resolution slit spectrograph UVES in three
different slit positions rotated by 120^o. Our spectro-astrometric
analysis in the [OI]λ6300 wind line reveals two newly discovered
microjets associated with Sz 103 and XX Cha. Both microjets have an extent of
about 0.04 arcseconds, that is, <10 au, and we confined their
orientation by the three slit observations. Furthermore, we confirm the binary
nature of VW Cha and CVSO 109. We present (further) evidence that DK Tau B
and CVSO 104 A are spectroscopic binaries. Sz 115 is tentatively a
spectroscopic binary. The origin of the LVC, that is, MHD winds versus
photoevaporative winds, of the Sz 103 and XX Cha microjets remains unclear.
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