X-Shooter study of accretion in Chamaeleon I

Abstract

We present the analysis of 34 new VLT/X-Shooter spectra of young stellar objects in the Chamaeleon I star forming region, together with four more spectra of stars in Taurus and two in Chamaeleon II. The broad wavelength coverage and accurate flux calibration of our spectra allow us to estimate stellar and accretion parameters for our targets by fitting the photospheric and accretion continuum emission from the Balmer continuum down to 700 nm. The dependence of accretion with stellar properties for this sample is consistent with previous results from the literature. The accretion rates for transitional disks are consistent with those of full disks in the same region. The spread of mass accretion rates at any given stellar mass is found to be smaller than in many studies, but is larger than that derived in the Lupus clouds using similar data and techniques. Differences in the stellar mass range and in the environmental conditions between our sample and that of Lupus may account for the discrepancy in scatter between Chamaeleon I and Lupus. Complete samples in Chamaeleon I and Lupus are needed to determine whether the difference in scatter of accretion rates and the lack of evolutionary trends are robust to sample selection.

Accepted for publication on A&A. Revised version submitted after language editing

References in corpus (24)

• An Optical Spectroscopic Study of T Tauri Stars. I. Photospheric Properties
• Stellar SEDs from 0.3-2.5 Microns: Tracing the Stellar Locus and Searching for Color Outliers in SDSS and 2MASS
• UV excess measures of accretion onto young very low-mass stars and brown dwarfs
• Accretion in the Rho-Oph pre-main sequence stars
• The Stellar Population of the Chamaeleon I Star-Forming Region
• The Disk Population of the Chamaeleon I Star-Forming Region
• On the gas content of transitional disks: a VLT/X-Shooter study of accretion and winds
• Why Do T Tauri Disks Accrete?
• Mapping accretion and its variability in the young open cluster NGC 2264: a study based on u-band photometry
• Accretion in protoplanetary disks: the imprint of core properties
• The Gaia-ESO Survey: Chromospheric Emission, Accretion Properties, and Rotation in $\gamma$ Velorum and Chamaeleon I
• X-Shooter spectroscopy of young stellar objects: V - Slow winds in T Tauri stars
• The young population of the Chamaeleon II dark cloud
• The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds.X. The Chamaeleon II Pre-Main Sequence Population as Observed With IRAC and MIPS
• The stellar mass-accretion rate relation in T Tauri stars and brown dwarfs
• Demographics of Transition Discs in Ophiuchus and Taurus
• The $\dot{M}-M$ relationship in pre-main sequence stars
• X-Shooter study of accretion in $\rho$-Ophiucus: very low-mass stars and brown dwarfs
• Optical Spectroscopic Classification and Membership of Young M Dwarfs in Star-Forming Regions
• The Keele-Exeter young cluster survey: I. Low mass pre-main sequence stars in NGC 2169
• POISSON project - III - Investigating the evolution of the mass accretion rate
• The evolution of accretion in young stellar objects: Strong accretors at 3 - 10 Myr
• Proper motions of young stars in Chamaeleon. I. A Virtual Observatory study of spectroscopically confirmed members
• On the accretion properties of young stellar objects in the L1615/L1616 cometary cloud

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• The evolution of dust-disk sizes from a homogeneous analysis of 1-10 Myr-old stars
• Homogeneous Analysis of the Dust Morphology of Transition Disks Observed with ALMA: Investigating dust trapping and the origin of the cavities
• Connection between jets, winds and accretion in T Tauri stars: the X-shooter view
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• HST spectra reveal accretion in MY Lupi
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• The Mass Accretion Rate and Stellar Properties in Class I Protostars
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• A revised estimate of the distance to the clouds in the Chamaeleon complex using the Tycho-Gaia Astrometric Solution
• X-Shooter observations of low-mass stars in the Eta Chamaeleontis association
• A High-resolution Optical Survey of Upper Sco: Evidence for Coevolution of Accretion and Disk Winds
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• A Census of the Low Accretors. II: Accretion Properties
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• Toward a Population Synthesis of Disks and Planets I. Evolution of Dust with Entrainment in Winds and Radiation Pressure
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• Protoplanetary and Transitional Disks in the Open Stellar Cluster IC 2395
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• X-Shooter survey of disk accretion in Upper Scorpius I. Very high accretion rates at age>5 Myr
• Continuum And Line Emission From Accretion Shocks at T Tauri Stars I. Correlations With Shock Parameters