Dynamical traceback age of the $\beta$ Pictoris moving group

Abstract

Context: The $\beta$ Pictoris moving group is one of the most well-known young associations in the solar neighbourhood and several members are known to host circumstellar discs, planets, and comets. Measuring its age with precision is basic to study several astrophysical processes such as planet formation and disc evolution which are strongly age dependent. Aims: We aim to determine a precise and accurate dynamical traceback age for the $\beta$ Pictoris moving group. Methods: Our sample combines the extremely precise Gaia DR2 astrometry with ground-based radial velocities measured in an homogeneous manner. We use an updated version of our algorithm to determine dynamical ages. The new approach takes into account a robust estimate of the spatial and kinematic covariance matrices of the association to improve the sample selection process and to perform the traceback analysis. Results: We estimate a dynamical age of $18.5_{-2.4}^{+2.0}$ Myr for the $\beta$ Pictoris moving group. We investigated the spatial substructure of the association at birth time and we propose the existence of a core of stars more concentrated. We also provide precise radial velocity measurements for 81 members of $\beta$ Pic, including ten stars with the first determination of their radial velocities. Conclusions: Our dynamical traceback age is three times more precise than previous traceback age estimates and, more important, for the first time, reconciles the traceback age with the most recent estimates of other dynamical, lithium depletion boundary, and isochronal ages. This has been possible thanks to the excellent astrometric and spectroscopic precisions, the homogeneity of our sample, and the detailed analysis of binaries and membership.

References in corpus (60)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Gaia mission
• Gaia Data Release 2: The astrometric solution
• Local Kinematics and the Local Standard of Rest
• galpy: A Python Library for Galactic Dynamics
• A Hipparcos census of the nearby OB associations
• The mass distribution and gravitational potential of the Milky Way
• A giant planet imaged in the disk of the young star Beta Pictoris
• A Gaia DR2 view of the Open Cluster population in the Milky Way
• Gaia Data Release 2: Kinematics of globular clusters and dwarf galaxies around the Milky Way
• The CORALIE survey for southern extra-solar planets VII. Two short-period Saturnian companions to HD108147 and HD168746
• Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Southern Sample
• Determining stellar atmospheric parameters and chemical abundances of FGK stars with iSpec
• A self-consistent, absolute isochronal age scale for young moving groups in the solar neighbourhood
• Three Dimensional Structure of the Milky Way Disk
• Turbulent molecular clouds
• On the age of the $\beta$ Pictoris moving group
• Bayesian analysis to identify new star candidates in nearby young stellar kinematic groups
• Modern stellar spectroscopy caveats
• Discovery of a large dust disk around the nearby star AU Microscopium
• A lithium depletion boundary age of 21 Myr for the Beta Pictoris moving group
• BANYAN. VII. A New Population of Young Substellar Candidate Members of Nearby Moving Groups from the BASS Survey
• The Age of Beta Pic
• Milky Way Mass Models for Orbit Calculations
• Astrophysical supplements to the ASCC-2.5. Ia. Radial velocities of about 55000 stars and mean radial velocities of 516 Galactic open clusters and associations
• The nearest young moving groups
• Identifying the young low-mass stars within 25 pc. II. Distances, kinematics and group membership
• Orbital characterization of the βPictoris b giant planet
• Gaia Data Release 2: The catalogue of radial velocity standard stars
• High-Dispersion Optical Spectra of Nearby Stars Younger Than The Sun
• Lithium Depletion of Nearby Young Stellar Associations
• BANYAN. III. Radial velocity, Rotation and X-ray emission of low-mass star candidates in nearby young kinematic groups
• Structure and kinematics of the Taurus star-forming region from Gaia-DR2 and VLBI astrometry
• BANYAN. IV. Fundamental parameters of low-mass star candidates in nearby young stellar kinematic groups - Isochronal Age determination using Magnetic evolutionary models
• BANYAN. XIII. A First Look at Nearby Young Associations with Gaia Data Release 2
• Understanding the spiral structure of the Milky Way using the local kinematic groups
• Cool Young Stars in the Northern Hemisphere: Beta Pictoris and AB Doradus Moving Group Candidates
• BANYAN. V. A Systematic All-Sky Survey for New Very Late-Type Low-Mass Stars and Brown Dwarfs in Nearby Young Moving Groups
• All-sky Co-moving Recovery Of Nearby Young Members. (ACRONYM) II: The Beta Pictoris Moving Group
• On the kinematic evolution of young local associations and the Sco-Cen complex
• The TW Hydrae Association : trigonometric parallaxes and kinematic analysis
• The Greater Taurus-Auriga Ecosystem I: There Is A Distributed Older Population
• LACEwING: A New Moving Group Analysis Code
• Nonlinear Effects in Models of the Galaxy: 1. Midplane Stellar Orbits in the Presence of 3D Spiral Arms
• Search for associations containing young stars (SACY). V. Is multiplicity universal? Tight multiple systems
• The rotation - Lithium depletion correlation in the beta Pictoris association and LDB age determination
• BANYAN. XII. New Members of Nearby Young Associations from Gaia-Tycho Data
• Corona-Australis DANCe. I. Revisiting the census of stars with Gaia-DR2 data
• CAFE: Calar Alto Fiber-fed Echelle spectrograph
• ACRONYM III: Radial Velocities for 336 Candidate Young Low-Mass Stars in the Solar Neighborhood, Including 78 Newly Confirmed Young Moving Group Members
• Spectroscopic confirmation of M-dwarf candidate members of the Beta Pictoris and AB Doradus Moving Groups
• Reaching the boundary between stellar kinematic groups and very wide binaries. III. Sixteen new stars and eight new wide systems in the beta Pictoris moving group
• Analysis of membership probability in nearby young moving groups with Gaia DR2
• A census of $\rho$ Oph candidate members from Gaia DR2
• Magneto-Convection and Lithium Age Estimates of the βPictoris Moving Group
• The beta Pictoris association: Catalog of photometric rotational periods of low-mass members and candidate members
• Young Stars with SALT
• Binaries among low-mass stars in nearby young moving groups
• CAFE2: an upgrade to the CAFE high-resolution spectrograph. Commissioning results and new public pipeline
• New Stars on the Block

Cited by in corpus (73)

• The Field Substellar Mass Function Based on the Full-sky 20-pc Census of 525 L, T, and Y Dwarfs
• Direct confirmation of the radial-velocity planet $\beta$ Pic c
• The CARMENES search for exoplanets around M dwarfs. Stellar atmospheric parameters of target stars with SteParSyn
• Warm terrestrial planet with half the mass of Venus transiting a nearby star
• The magnetic field and multiple planets of the young dwarf AU~Mic
• Rapid contraction of giant planets orbiting the 20 million-years old star V1298 Tau
• Precise Dynamical Masses and Orbital Fits for $\beta$ Pic b and $\beta$ Pic c
• The star formation history of Upper Scorpius and Ophiuchus
• Significance Mode Analysis (SigMA) for hierarchical structures. An application to the Sco-Cen OB association
• A survey of the linear polarization of directly imaged exoplanets and brown dwarf companions with SPHERE-IRDIS. First polarimetric detections revealing disks around DH Tau B and GSC 6214-210 B
• The SPHERE infrared survey for exoplanets (SHINE)- I Sample definition and target characterization
• A detailed characterization of HR 8799's debris disk with ALMA in Band 7
• Exocomets size distribution in the $\beta$ Pictoris planetary system
• A Census of the TW Hya Association with Gaia
• Lithium depletion boundary, stellar associations, and Gaia
• Constraining planetesimal stirring: how sharp are debris disc edges?
• New Coronae and Stellar Associations Revealed by a Clustering Analysis of the Solar Neighborhood
• Addressing Systematics in the Traceback Age of the $\beta$ Pictoris Moving Group
• Searching for flaring star-planet interactions in AU Mic TESS observations
• The Atacama Cosmology Telescope: Detection of mm-wave transient sources
• The origin of free-floating planets
• Chronostar. II. Kinematic age and substructure of the Scorpius-Centaurus OB2 association
• Catalogue of exoplanets accessible in reflected starlight to the Nancy Grace Roman Space Telescope. A population study and prospects for phase-curve measurements
• The Corona Australis star formation complex is accelerating away from the Galactic plane
• Dynamical age of the Tucana-Horologium young stellar association
• Transit timing variations of AU Microscopii b and c
• SPYGLASS. II. The Multi-Generational and Multi-Origin Star Formation History of Cepheus Far North
• ESPRESSO Mass determination of TOI-263b: An extreme inhabitant of the brown dwarf desert
• Redder than Red: Discovery of an Exceptionally Red L/T Transition Dwarf
• Characterizing the morphology of the debris disk around the low-mass star GSC~07396-00759
• A Census of the 32 Ori Association with Gaia
• JWST-TST High Contrast: JWST/NIRCam observations of the young giant planet $\beta$ Pic b
• Dynamical Mass of the Young Brown Dwarf Companion PZ Tel B
• The $\beta$ Pictoris b Hill sphere transit campaign. Paper I: Photometric limits to dust and rings
• The cosmic DANCe of Perseus I: Membership, phase-space structure, mass, and energy distributions
• Polarization from Aligned Dust Grains in the $\beta$ Pic Debris Disk
• The beta Pictoris system: Setting constraints on the planet and the disk structures at mid-IR wavelengths with NEAR
• High-resolution ALMA observations of V4046Sgr: a circumbinary disc with a thin ring
• The vertical structure of debris discs and the role of disc gravity: A primer using a simplified model
• A possible misaligned orbit for the young planet AU Mic c
• An empirical isochrone archive for nearby open clusters
• Expansion Kinematics of Young Clusters. I. Lambda Ori
• Curves of growth for transiting exocomets: Application to Fe II lines in the Beta Pictoris system
• The cosmic waltz of Coma Berenices and Latyshev 2 (Group X). Membership, phase-space structure, mass, and energy distributions
• An inner warp discovered in the disk around HD 110058 using VLT/SPHERE and HST/STIS
• Probing the innermost region of the AU~Microscopii debris disk
• Disks in Nearby Young Stellar Associations Found Via Virtual Reality
• Water ice in the debris disk around HD 181327
• Population of excited levels of Fe+, Ni+ and Cr+ in exocomets gaseous tails
• Narrow belt of debris around the Sco-Cen star HD 141011
• Formation of the warped debris disc around $\beta$ Pictoris
• The Solar System's passage through the Radcliffe wave during the middle Miocene
• Hints of auroral and magnetospheric polarized radio emission from the scallop-shell star 2MASS J05082729$-$2101444
• Abundances of refractory ions in Beta Pictoris exocomets
• Dynamical Origin for the Collinder 132-Gulliver 21 Stream: A Mixture of three Co-Moving Populations with an Age Difference of 250 Myr
• ALMA's view of the M-dwarf GSC 07396-00759's edge-on debris disc: AU Mic's coeval twin
• Dynamics of the Beta Pictoris planetary system and possibility of an additional planet
• Astrometric and photometric characterization of $\eta$ Tel B combining two decades of observations
• Fundamental limits to orbit reconstruction due to non-conservation of stellar actions in a Milky Way-like simulation
• Bayesian ages of local young stellar associations I. Through the expansion rate method
• Exocomet orbital distribution around $\beta$ Pictoris
• Planet-forming disks and their environment across regions and time from the full NIR census
• One is the loneliest number: multiplicity in cool dwarfs
• Toward the fabric of the Milky Way I. The density of disk streams from a local $250^3$ pc${}^3$ volume
• Estimates of the kinematic age of the $\beta$ Pictoris moving group from up-to-date data
• The late Miocene ${}^{10}$Be anomaly and the possibility of a supernova
• Transit distances and composition of low-velocity exocomets in the $\beta$ Pic system
• The changing face of AU Mic b: stellar spots, spin-orbit commensurability, and Transit Timing Variations as seen by CHEOPS and TESS
• VLTI/MATISSE observations of the hot dust around $\beta$ Pictoris: Observing faint objects with MATISSE
• Orbital motion and dynamical mass of the complex periodic variable binary system 2MASS J05082729-2101444
• A simple linear model to aid in analyses of the Beta Pictoris moving group
• Going Bayesian on the ages of nearby young stellar systems I. The expansion rate method
• The Directly-Imaged Exoplanet Host Star 51 Eridani is a Gamma Doradus Pulsator