Kinematic Detection of the Galactic Nuclear Disc

Abstract

We report the detection of the Galactic nuclear disc in line-of-sight kinematics of stars, measured with infrared spectroscopy from APOGEE. This stellar component of the nuclear disc has an extent and rotation velocity V ~ 120kms comparable to the gas disc in the central molecular zone. The current data suggest that this disc is kinematically cool and has a small vertical extent of order 50pc. The stellar kinematics suggest a truncation radius/steep decline of the stellar disc at a galactocentric radius R ~ 150pc, and provide tentative evidence for an overdensity at the position of the ring found in the molecular gas disc.

6 pages, 4 figures, accepted by ApJ Letters

References in corpus (7)

• The Two Young Star Disks in the Central Parsec of the Galaxy: Properties, Dynamics and Formation
• Target Selection for the Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• The dynamical evolution of molecular clouds near the Galactic Centre - I. Orbital structure and evolutionary timeline
• Star Formation in the Central 400 pc of the Milky Way: Evidence for a Population of Massive YSOs
• Chemical Abundances of Luminous Cool Stars in the Galactic Center from High-Resolution Infrared Spectroscopy
• Kinematics of classical Cepheids in the Nuclear Stellar Disk
• Recognizing the fingerprints of the Galactic bar: a quantitative approach to comparing model (l,v) distributions to observation

Cited by in corpus (41)

• Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
• Dynamical modelling of the Galactic bulge and bar: the Milky Way's bar pattern speed, stellar, and dark matter mass distribution
• Galactic Rotation Curves vs. Ultra-Light Dark Matter: Implications of the Soliton -- Host Halo Relation
• Resonance sweeping by a decelerating Galactic bar
• Final Targeting Strategy for the SDSS-IV APOGEE-2S Survey
• Simulations of the Milky Way's central molecular zone -- II. Star formation
• Recognising Axionic Dark Matter by Compton and de-Broglie Scale Modulation of Pulsar Timing
• Ultra-light dark matter in disk galaxies
• Gas dynamics in the Milky Way: a low pattern speed model
• Gas Dynamics in the Galaxy: Total Mass Distribution and the Bar Pattern Speed
• CMZoom: Survey Overview and First Data Release
• Age Dating the Galactic Bar with the Nuclear Stellar Disc
• The Milky Way's nuclear stellar disc: A dynamically cool and metal-rich component formed from the Central Molecular Zone?
• The 3D structure of the Galactic bulge
• Dynamical Evidence of a Solitonic Core of $10^9{M}_{\odot }$ in the Milky Way
• Jeans modelling of the Milky Way's nuclear stellar disc
• Testing the Prediction of Fuzzy Dark Matter Theory in the Milky Way Center
• Cool stars in the Galactic Center as seen by APOGEE: M giants, AGB stars and supergiant stars/candidates
• A KMOS survey of the nuclear disk of the Milky Way I: Survey design and metallicities
• Mira variables in the Milky Way's nuclear stellar disc: discovery and classification
• Composite Bulges -- II. Classical Bulges and Nuclear Discs in Barred Galaxies: The Contrasting Cases of NGC 4608 and NGC 4643
• The extinction law in the inner $3\times 3$ deg${}^2$ of the Milky Way and the red clump absolute magnitude in the inner bar-bulge
• A proper motion catalogue for the Milky Way's nuclear stellar disc
• First results from a large-scale proper motion study of the Galactic Centre
• Constraints on the Galactic Centre environment from \textit{Gaia} hypervelocity stars III: Insights on a possible companion to Sgr A*
• Kinematic data rebuild the Nuclear star cluster as the most metal rich region of the Galaxy
• Predicted Stellar Kinematics of a Kiloparsec-Scale Nuclear Disc (or Ring) in the Milky Way
• A first glimpse at the line-of-sight structure of the Milky Way's nuclear stellar disc
• A new distance to the Brick, the dense molecular cloud G0.253+0.016
• Distance to the Brick cloud using stellar kinematics
• Probing the Milky Way stellar and brown dwarf initial mass function with modern microlensing observations
• Origin of reduced dynamical friction by dark matter halos with net prograde rotation
• Dynamical galactic effects induced by stable vortex structure in bosonic dark matter
• The Milky Way like galaxy NGC 6384 and its nuclear star cluster at high NIR spatial resolution using LBT/ARGOS commissioning data
• Metallicity-dependent kinematics and orbits in the Milky Way's nuclear stellar disc
• Chemical Evolution in Nuclear Stellar Discs
• Vortex Lines in Ultralight Bosonic Dark Matter around Rotating Supermassive Black Holes
• Chandra X-ray Measurement of Heavy Element Abundances of Wolf-Rayet Stars in the Galactic Center
• Hunting for Planetary Nebulae toward the Galactic Center
• Understanding the Galaxy
• Self-consistent modelling of the Milky Way's Nuclear Stellar Disc