The He I 10830 line as a probe of winds and accretion in young stars in Lupus and Upper Scorpius
arXiv:2208.02940 · doi:10.1051/0004-6361/202244254
Abstract
The He I 1 micron line is a high excitation line which allows us to probe the innermost regions of protostellar disks, and to trace both accreting and outflowing material. We use X-Shooter observations of a sample of 107 young stars in the Lupus (1-3 Myr) and Upper Scorpius (5-10 Myr) star-forming regions to search for correlations between the line properties, as well as the disk inclination and accretion luminosity. We identified eight distinct profile types in the sample. We fitted Gaussian curves to the line features to measure the maximum velocities traced in absorption, the full-width half-maximum (FWHM) of the line features, and the Gaussian area of the features. We compare the proportion of each profile type in our sample to previous studies in Taurus. We find significant variations between Taurus and Lupus in the proportion of P Cygni and inverse P Cygni profiles, and between Lupus and Upper Scorpius in the number of emission-only and combination profile types. We find that the blue-shifted absorption features appear less blue-shifted at disk inclinations close to edge-on, but no such trend with inclination is observed in sources with only red-shifted features. Higher accretion rates were observed in sources with strong blue-shifted features which, along with the changes in the proportions of each profile type observed in the two regions, indicates that younger sources may drive stronger jets or winds. Overall, we observe variations in the proportion of each profile type and in the line properties which indicates and evolution of accretion and ejection signatures over time, and with source properties. These results confirm past works and models of the He I line, but for a larger sample and for multiple star-forming regions. The work highlights the power of the He I line as a probe of the gas in the innermost regions of the disk.
arXiv comment24 pages, 21 figures, 4 tables - accepted by A&A on 01/08/2022
References in corpus (44)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- Gaia Data Release 2. Summary of the contents and survey properties
- X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope
- Molecfit: A general tool for telluric absorption correction. I. Method and application to ESO instruments
- A Revised Age for Upper Scorpius and The Star-Formation History Among the F-Type Members of the Scorpius-Centaurus OB Association
- Molecfit: A general tool for telluric absorption correction II. Quantitative evaluation on ESO-VLT X-Shooter spectra
- X-Shooter spectroscopy of young stellar objects in Lupus: Accretion properties of class II and transitional objects
- The Disk Population of the Taurus Star-Forming Region
- X-Shooter spectroscopy of young stellar objects: IV -- Accretion in low-mass stars and sub-stellar objects in Lupus
- ALMA Survey of Lupus Protoplanetary Disks II: Gas Disk Radii
- Which jet launching mechanism(s) in TTauri stars?
- Evidence for Mass-dependent Circumstellar Disk Evolution in the 5 Myr-old Upper Scorpius OB Association
- ALMA Observations of Circumstellar Disks in the Upper Scorpius OB Association
- Probing T Tauri Accretion and Outflow with 1 Micron Spectroscopy
- The Disk Population of the Upper Scorpius Association
- Towards a Global Evolutionary Model of Protoplanetary Disks
- Why do protoplanetary disks appear not massive enough to form the known exoplanet population?
- Can we predict the global magnetic topology of a pre-main sequence star from its position in the Hertzsprung-Russell diagram?
- Physical properties of dusty protoplanetary disks in Lupus: evidence for viscous evolution?
- Kinematic links and the co-evolution of MHD winds, jets, and inner disks from a high-resolution optical [OI] survey
- He I 10830 as a Probe of Winds in Accreting Young Stars
- Modeling T Tauri Winds from He I 10830 Profiles
- Connection between jets, winds and accretion in T Tauri stars: the X-shooter view
- Measurement of Circumstellar Disk Sizes in the Upper Scorpius OB Association with ALMA
- Characterizing the IYJ Excess Continuum Emission in T Tauri Stars
- X-Shooter spectroscopy of young stellar objects: V - Slow winds in T Tauri stars
- X-Shooter spectroscopy of young stellar objects in Lupus. Atmospheric parameters, membership and activity diagnostics
- Origins of the H, He I, and Ca II Line Emission in Classical T Tauri Stars
- The Role of Magnetic Fields in Protostellar Outflows and Star Formation
- Gaia EDR3 Reveals the Substructure and Complicated Star Formation History of the Greater Taurus-Auriga Star Forming Complex
- Redshifted Absorption at He I 10830 as a Probe of the Accretion Geometry of T Tauri Stars
- Diagnosing Mass Flows Around Herbig Ae/Be Stars Using the He I 10830 Line
- HST spectra reveal accretion in MY Lupi
- An Episodic Wide-angle Outflow in HH 46/47
- Line formation in the inner winds of classical T Tauri stars: testing the conical-shell wind solution
- Optical Mass Flow Diagnostics in Herbig Ae/Be Stars
- Knotty protostellar jets as a signature of episodic protostellar accretion?
- Direct Measurement of Interstellar Extinction Toward Young Stars Using Atomic Hydrogen Lyman- Absorption
- A Gaia Survey for Young Stars Associated with the Lupus Clouds
- A Census of the Low Accretors. I: The Catalog
- ESO-H~574 and Par-Lup3-4 Jets: Exploring the spectral, kinematical and physical properties
- Stellar masses and disk properties of Lupus young stellar objects traced by velocity-aligned stacked ALMA 13CO and C18O spectra
- A MUSE Spectro-imaging Study of the Th 28 Jet: Precession in the Inner Jet
- Probing Protoplanetary Disk Winds with C II Absorption
Cited by in corpus (9)
- JWST/NIRSpec Observations of the Planetary Mass Companion TWA 27B
- JWST Peers into the Class I Protostar TMC1A: Atomic Jet and Spatially Resolved Dissociative Shock Region
- Modeling JWST MIRI-MRS Observations of T Cha: Mid-IR Noble Gas Emission Tracing a Dense Disk Wind
- Gaia21bty: An EXor lightcurve exhibiting an FUor spectrum
- An Interpretable Machine Learning Framework for Modeling High-Resolution Spectroscopic Data
- Revisiting the Helium and Hydrogen Accretion Indicators at TWA 27B: Weak Mass Flow at Near-Freefall Velocity
- Accretion disc winds in X-ray binaries
- Occurrence rates of accreting companions from a new method for computing emission-line survey sensitivity: application to the H-alpha Giant Accreting Protoplanet Survey
- MeerKAT and ALMA view of the AGAL045.804-0.356 clump