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.

arXiv comment22 pages, 13 figures, Accepted by A&A

References in corpus (50)

• Dust Grain Size Distributions and Extinction in the Milky Way, LMC, and SMC
• X-Shooter spectroscopy of young stellar objects: IV -- Accretion in low-mass stars and sub-stellar objects in Lupus
• 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
• HST/STIS spectroscopy of the optical outflow from DG Tau: structure and kinematics on sub-arcsecond scales
• On the formation of H-alpha line emission around classical T Tauri stars
• Rotation of Jets from Young Stars: New Clues from the Hubble Space Telescope Imaging Spectrograph
• X-shooter spectroscopy of young stellar objects: I - Mass accretion rates of low-mass T Tauri stars in σOrionis
• The Planetary Mass Companion 2MASS1207-3932 B: Temperature, Mass and Evidence for an Edge-On Disk
• X-Shooter spectroscopy of young stellar objects: II. Impact of chromospheric emission on accretion rate estimates
• The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds. XI. Lupus Observed With IRAC and MIPS
• Evidence for Disk Photoevaporation Driven by the Central Star
• A combined optical/infrared spectral diagnostic analysis of the HH1 jet
• Recipes for stellar jets: results of combined optical/infrared diagnostics
• Jets and Outflows From Star to Cloud: Observations Confront Theory
• Circumstellar structure of RU Lupi down to au scales
• A Widely-Separated, Highly-Occluded Companion to the Nearby Low-Mass T Tauri Star TWA 30
• Redshifted Absorption at He I 10830 as a Probe of the Accretion Geometry of T Tauri Stars
• Paschen beta emission as a tracer of outflow activity from T-Tauri stars, as compared to Optical Forbidden emission
• Classical T Tauri-like Outflow Activity in the Brown Dwarf Mass Regime
• The Enigmatic Young Low-Mass Variable TWA 30
• LAMP: The Long-term Accretion Monitoring Program of T Tauri stars in Chamaeleon-I
• How Variable is Accretion in Young Stars?
• The First X-shooter Observations of Jets from Young Stars
• Tracing kinematical and physical asymmetries in the jet from DG Tau B
• POISSON project - I - Emission lines as accretion tracers in young stellar objects: results from observations of Chamaeleon I and II sources
• HST/STIS observations of the RW Aurigae bipolar jet: mapping the physical parameters close to the source
• Bipolar jets launched from accretion disks. II. Formation of symmetric and asymmetric jets and counter jets
• HeI 1.083 micron emission and absorption in DG Tau: line excitation in jet, hot wind, and accretion flow
• An outflow origin of the [NeII] emission in the T Tau triplet
• X-shooter observations of the accreting brown dwarf J053825.4-024241
• Spatially Resolved Observations of the Bipolar Optical Outflow from the Brown Dwarf 2MASSJ12073347-3932540
• Quiescent H2 Emission From Pre-Main Sequence Stars in Chamaeleon I
• The diagnostic potential of Fe lines applied to protostellar jets
• Mass loss at the lowest stellar masses
• On the origin of [Ne II] emission in young stars: mid-infrared and optical observations with the Very Large Telescope
• Generation of radiative knots in a randomly pulsed protostellar jet I. Dynamics and energetics
• Multi-wavelength study of the disk around the very low-mass star Par-Lup3-4
• The bipolar outflow and disk of the brown dwarf ISO217
• 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
• An HST Imaging Survey of Low-Mass Stars in the Chamaeleon I Star Forming region
• A molecular outflow driven by the brown dwarf binary FU Tau
• Tracing the origins of permitted emission lines in RU Lupi down to AU scales
• X-Shooter spectroscopy of FU Tau A
• Velocity asymmetries in YSO jets: Intrinsic and extrinsic mechanisms
• Discovery of an outflow of the very low-mass star ISO 143
• Disks, accretion and outflows of brown dwarfs

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• Connection between jets, winds and accretion in T Tauri stars: the X-shooter view
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• Asymmetric MHD Outflows/Jets from Accreting T Tauri Stars
• X-Shooter spectroscopy of young stellar objects - VI - HI line decrements
• The small-scale HH34 IRS jet as seen by X-shooter
• The He I $\lambda$10830 $\mathring{A}$ line as a probe of winds and accretion in young stars in Lupus and Upper Scorpius
• The Near-Infrared Outflow and Cavity of the proto-Brown Dwarf Candidate ISO-Oph 200
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• Bipolar molecular outflow of the very low-mass star Par-Lup3-4
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• Revealing Ionization Conditions of Sz 102 with Spatially Resolved [Ne III] Microjets
• 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
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