ESO-H$\alpha$~574 and Par-Lup3-4 Jets: Exploring the spectral, kinematical and physical properties

Abstract

In this paper a comprehensive analysis of VLT / X-Shooter observations of two jet systems, namely ESO-H$\alpha$ 574 a K8 classical T Tauri star and Par-Lup 3-4 a very low mass (0.13~\Msun) M5 star, is presented. Both stars are known to have near-edge on accretion disks. A summary of these first X-shooter observations of jets was given in a 2011 letter. The new results outlined here include flux tables of identified emission lines, information on the morphology, kinematics and physical conditions of both jets and, updated estimates of ${\dot{M}}_{out}$ / ${\dot{M}}_{acc}$. Asymmetries in the \eso flow are investigated while the \para jet is much more symmetric. The density, temperature, and therefore origin of the gas traced by the Balmer lines are investigated from the Balmer decrements and results suggest an origin in a jet for \eso while for \para the temperature and density are consistent with an accretion flow. ${\dot{M}}_{acc}$ is estimated from the luminosity of various accretion tracers. For both targets, new luminosity relationships and a re-evaluation of the effect of reddening and grey extinction (due to the edge-on disks) allows for substantial improvements on previous estimates of ${\dot{M}}_{acc}$. It is found that log(${\dot{M}}_{acc}$) = -9.15 $\pm$ 0.45~\Msun yr${}^{-1}$ and -9.30 $\pm$ 0.27~\Msun yr${}^{-1}$ for \eso and \para respectively. Additionally, the physical conditions in the jets (electron density, electron temperature, and ionisation) are probed using various line ratios and compared with previous determinations from iron lines. The results are combined with the luminosity of the [SII]$\lambda$6731 line to derive ${\dot{M}}_{out}$ through a calculation of the gas emissivity based on a 5-level atom model.

22 pages, 13 figures, Accepted by A&A

References in corpus (14)

• UV excess measures of accretion onto young very low-mass stars and brown dwarfs
• Which jet launching mechanism(s) in TTauri stars?
• The Stellar Population of the Chamaeleon I Star-Forming Region
• Probing T Tauri Accretion and Outflow with 1 Micron Spectroscopy
• On the formation of H-alpha line emission around classical T Tauri stars
• The Planetary Mass Companion 2MASS1207-3932 B: Temperature, Mass and Evidence for an Edge-On Disk
• The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds. XI. Lupus Observed With IRAC and MIPS
• Recipes for stellar jets: results of combined optical/infrared diagnostics
• Redshifted Absorption at He I 10830 as a Probe of the Accretion Geometry of T Tauri Stars
• An outflow origin of the [NeII] emission in the T Tau triplet
• Quiescent H2 Emission From Pre-Main Sequence Stars in Chamaeleon I
• LBT/LUCIFER near-infrared spectroscopy of PV Cephei. An outbursting young stellar object with an asymmetric jet
• Proper Motion Studies of Outflows from Classical T Tauri Stars
• Tracing the origins of permitted emission lines in RU Lupi down to AU scales

Cited by in corpus (16)

• Connection between jets, winds and accretion in T Tauri stars: the X-shooter view
• An extensive VLT/X-Shooter library of photospheric templates of pre-main sequence stars
• Characterization of Molecular Outflows in The Substellar Domain
• Asymmetric MHD Outflows/Jets from Accreting T Tauri Stars
• X-Shooter spectroscopy of young stellar objects - VI - HI line decrements
• The He I $\lambda$10830 $\mathring{A}$ line as a probe of winds and accretion in young stars in Lupus and Upper Scorpius
• The small-scale HH34 IRS jet as seen by X-shooter
• The [Ne III] Jet of DG Tau and its Ionization Scenarios
• Accretion-ejection connection in the young brown dwarf candidate ISO-Cha1 217
• Bipolar molecular outflow of the very low-mass star Par-Lup3-4
• Revealing Ionization Conditions of Sz 102 with Spatially Resolved [Ne III] Microjets
• Asymmetric Signatures of Warps in Edge-on Disks
• Optical Forbidden Emission Line Spectro-astrometry of T CrA: Evidence for a Multiple System and Multiple Jets
• Investigating the asymmetry of young stellar outflows: Combined MUSE-X-shooter study of the Th 28 jet
• Revisiting the BE99 method for the study of outflowing gas in protostellar jets
• Variability of the DG Tau Forbidden Emission Line Low Velocity Component