Jet from the enigmatic high-latitude star BP Psc and evolutionary status of its driving source

• DOI: 10.1093/mnras/stac2667
• Publication Date: 2022-09-21T20:48:31Z
• Authors: Ilya S Potravnov; M Yu Khovritchev; S A Artemenko; D N Shakhovskoy
• Keywords: Star (game theory); High latitude

ABSTRACT BP Psc is an active late-type (sp:G9) star with unclear evolutionary status lying at high-galactic latitude b = −57°. It also the source of well collimated bipolar jet. We present results proper motion and radial velocity study outflow based on archival Hα imaging GMOS camera 8.1-m Gemini-North telescope as recent long-slit spectroscopy SCORPIO multimode focal reducer 6-m BTA SAO RAS. The 3D kinematics jet revealed full spatial up to ∼140 km s−1 allows us estimate distance system D 135 ± 40 pc. This leads estimation central luminosity L* ≈ 1.2 L⊙, indicating that it ≈1.3M⊙ T Tauri age t ≲ 7 Myrs. measured electron density order Ne ∼ 102 cm−3 mean ionization fraction f 0.04 within knots estimated upper limit mass-loss rate in NE lobe $\dot{M}_{\rm out}\approx 1.2\cdot 10^{-8}{\rm M}_{\odot }\,{\rm yr}^{-1}$. physical characteristics are typical for low-excitation YSO jets consistent magnetocentrifugal mechanism its launching collimation. Prominent wiggling pattern images allowed suppose existence a secondary substellar companion non-coplanar orbit most plausible mass Mp 30MJup. conclude one closest Sun young jet-driving systems origin possibly related episode formation triggered by expanding supershells second Galactic quadrant.