Dynamical stellar masses of pre-main sequence stars in Lupus and Taurus obtained with ALMA surveys in comparison with stellar evolutionary models

Abstract

We analysed archival molecular line data of pre-main sequence (PMS) stars in the Lupus and Taurus star-forming regions obtained with ALMA surveys with an integration time of a few minutes per source. We stacked the data of ${}^{13}$CO and C${}^{18}$O (J = 2-1 & 3-2) and CN (N = 3-2, J = 7/2-5/2) lines to enhance the signal-to-noise ratios, and measured the stellar masses of 45 out of 67 PMS stars from the Keplerian rotation in their circumstellar disks. The measured dynamical stellar masses were compared to the stellar masses estimated from the spectroscopic measurements with seven different stellar evolutionary models. We found that the magnetic model of Feiden (2016) provides the best estimate of the stellar masses in the mass range of $0.6M_{\odot }\le M_{\star }\le 1.3M_{\odot }$ with a deviation of $<$0.7$\sigma$ from the dynamical masses, while all the other models underestimate the stellar masses in this mass range by 20% to 40%. In the mass range of $<0.6M_{\odot }$, the stellar masses estimated with the magnetic model of Feiden (2016) have a larger deviation ($>2\sigma$) from the dynamical masses, and other, non-magnetic stellar evolutionary models of Siess et al. (2000), Baraffe et al. (2015) and Feiden (2016) show better agreements with the dynamical masses with the deviations of 1.4$\sigma$ to 1.6$\sigma$. Our results show the mass dependence of the accuracy of these stellar evolutionary models.

arXiv comment31 pages, 10 figures, Accepted by ApJ

References in corpus (52)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Gaia mission
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
• Improving PARSEC models for very low mass stars
• ALMA Survey of Lupus Protoplanetary Disks I: Dust and Gas Masses
• Gaps and Rings in an ALMA Survey of Disks in the Taurus Star-forming Region
• X-Shooter spectroscopy of young stellar objects in Lupus: Accretion properties of class II and transitional objects
• An Optical Spectroscopic Study of T Tauri Stars. I. Photospheric Properties
• Dynamical Masses of T Tauri Stars and Calibration of PMS Evolution
• 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
• A Kinematical Detection of Two Embedded Jupiter Mass Planets in HD 163296
• An ALMA Survey of Protoplanetary Disks in the $\sigma$ Orionis Cluster
• Magnetic Inhibition of Convection and the Fundamental Properties of Low-Mass Stars. III. A Consistent 10 Myr Age for the Upper Scorpius OB Association
• An Assessment of Dynamical Mass Constraints on Pre-Main Sequence Evolutionary Tracks
• The role of stellar feedback in the formation of galaxies
• ALMA Observations of Circumstellar Disks in the Upper Scorpius OB Association
• The warm gas atmosphere of the HD 100546 disk seen by Herschel (Evidence of a gas-rich, carbon-poor atmosphere?)
• Compact Disks in a High Resolution ALMA Survey of Dust Structures in the Taurus Molecular Cloud
• Episodic accretion at early stages of evolution of low mass stars and brown dwarfs: a solution for the observed luminosity spread in HR diagrams?
• Survival of molecular gas in cavities of transition disks (I. CO)
• Direct mapping of the temperature and velocity gradients in discs. Imaging the vertical CO snow line around IM Lupi
• X-shooter spectroscopy of young stellar objects: I - Mass accretion rates of low-mass T Tauri stars in σOrionis
• X-Shooter study of accretion in Chamaeleon I: II. A steeper increase of accretion with stellar mass for very low mass stars?
• Physical properties of dusty protoplanetary disks in Lupus: evidence for viscous evolution?
• Determining protoplanetary disk gas masses from CO isotopologues line observations
• Protoplanetary Disk Properties in the Orion Nebula Cluster: Initial Results from Deep, High-Resolution ALMA Observations
• Detection of exocometary CO within the 440 Myr-old Fomalhaut belt: a similar CO+CO${}_2$ ice abundance in exocomets and Solar System comets
• The Dawes Review 8: Measuring the Stellar Initial Mass Function
• Empirical Isochrones for Low Mass Stars in Nearby Young Associations
• Observational constraints on dust disk sizes in tidally truncated protoplanetary disks in multiple systems in the Taurus region
• Empirical Tests of Pre-Main-Sequence Stellar Evolution Models with Eclipsing Binaries
• Masses and Implications for Ages of Low-Mass Pre-Main Sequence Stars in Taurus and Ophiuchus
• Temperature, Mass and Turbulence: A Spatially Resolved Multi-Band Non-LTE Analysis of CS in TW~Hya
• The Ophiuchus DIsk Survey Employing ALMA (ODISEA): Disk Dust Mass Distributions across Protostellar Evolutionary Classes
• ALMA survey of Class II protoplanetary disks in Corona Australis: a young region with low disk masses
• Signatures of unresolved binaries in stellar spectra: implications for spectral fitting
• The masses of young stars: CN as a probe of dynamical masses
• Component Masses of the Young Spectroscopic Binary UZ Tau E
• Dynamical Masses of Low Mass Stars in the Taurus and Ophiuchus Star Forming Regions
• Stacking Spectra in Protoplanetary Disks: Detecting Intensity Profiles from Hidden Molecular Lines in HD 163296
• Protoplanetary disk masses in NGC 2024: Evidence for two populations
• V1094 Sco: a rare giant multi-ringed disk around a T Tauri star
• DCO${}^{+}$, DCN and N${}_2$D${}^{+}$ reveal three different deuteration regimes in the disk around the Herbig Ae star HD163296
• Dynamical Masses of Young Stars I: Discordant Model Ages of Upper Scorpius
• HST spectra reveal accretion in MY Lupi
• High Precision Dynamical Masses of Pre-Main Sequence Stars with ALMA and Gaia
• Constraining the radial drift of millimeter-sized grains in the protoplanetary disks in Lupus
• Stellar masses and disk properties of Lupus young stellar objects traced by velocity-aligned stacked ALMA 13CO and C18O spectra
• Dynamical Masses of Young Stars II: Young Taurus Binaries Hubble~4, FF~Tau, and HP~Tau/G3
• Measuring the Initial Mass Function of Low Mass Stars and Brown Dwarfs

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