Estimation of Galactic model parameters in high latitudes with 2MASS

Abstract

In this paper, we try to find any dependence of the Galactic structural parameters with the Galactic longitude for either the thin disc or the thick disc of the Milky Way, that would indicate to possible inhomogeneities or asymmetries in those Galactic components. Galactic model parameters obtained using a set of 36 high-latitude fields with 2MASS photometry for the different fields show that, effectively, they are Galactic longitude-dependent. The thick disc scaleheight changes from 800 pc at 150 deg < l < 230 deg to 1050 pc at |l| < 30 deg. A plausible explanation for this finding might be the effect of the flare in this Galactic component that changes the scaleheight with Galactocentric distance

9 pages, 15 figures (accepted for publication in A&A)

References in corpus (22)

• The Radial Velocity Experiment (RAVE): first data release
• Modelling the Galactic Interstellar Extinction Distribution in Three Dimensions
• Three Dimensional Structure of the Milky Way Disk
• A three-dimensional Galactic extinction model
• Outer structure of the Galactic warp and flare: explaining the Canis Major over-density
• Old stellar Galactic disc in near-plane regions according to 2MASS: scales, cut-off, flare and warp
• Three-Dimensional Distribution of the ISM in the Milky Way Galaxy: I. The HI Disk
• Starcounts Redivivus. IV. Density Laws Through Photometric Parallaxes
• The Vertical Structure of the Outer Milky Way HI Disk
• K-Band Calibration of the Red Clump Luminosity
• Population effects on the red giant clump absolute magnitude: The K-band
• Detection of the old stellar component of the major Galactic bar
• WIYN Open Cluster Study. X. The K-Band Magnitude of the Red Clump as a Distance Indicator
• Vertical scaleheights in a gravitationally coupled, three-component Galactic disk
• The Long Bar in the Milky Way. Corroboration of an old hypothesis
• Generation of galactic disc warps due to intergalactic accretion flows onto the disc
• A different approach for the estimation of Galactic model parameters
• Galactic structure studies with BATC star counts
• Evidence for a deficit of young and old stars in the Milky Way inner in-plane disc
• On the origin of warps and the role of the intergalactic medium
• Stellar density distribution in the NIR on the Galactic plane at longitudes 15-27 deg. Clues for the Galactic bar ?
• The Asymmetric Thick Disk: A Star Count and Kinematic Analysis. II The Kinematics

Cited by in corpus (24)

• Thin, thick and dark discs in LCDM
• The Milky Way's Stellar Disk
• Kinematical and chemical vertical structure of the Galactic thick disk II. A lack of dark matter in the solar neighborhood
• The long Galactic bar as seen by UKIDSS Galactic Plane Survey
• Flare in the Galactic stellar outer disc detected in SDSS-SEGUE data
• The 3D Velocity Structure of the Thick Disk from SPM4 and RAVE DR2
• The Information Of The Milky Way From 2MASS Whole Sky Star Count: The Structure Parameters
• Local stellar kinematics from RAVE data: III. Radial and Vertical Metallicity Gradients based on Red Clump Stars
• A comprehensive study of the open cluster NGC 6866
• Constraining the Galactic structure parameters with the XSTPS-GAC and SDSS photometric surveys
• Galactic Model Parameters and Space Density of Cataclysmic Variables in Gaia Era: New Constraints to Population Models
• Estimation of Galactic Model Parameters and Metalicity Distribution in Intermediate Latitudes with SDSS
• The metallicity distributions in high-latitudes with SDSS
• CCD UBV photometry of the open cluster NGC 6819
• Multiwavelength Absolute Magnitudes and Colours of Red Clump Stars in {\it Gaia} Era
• Estimation of Absolute Magnitude-dependent Galactic Model Parameters In Intermediate Latitude With SDSS and SCUSS
• The Deeper, Wider, Faster Program: Exploring stellar flare activity with deep, fast cadenced DECam imaging via machine learning
• The long bar as seen by the VVV Survey: II. Star counts
• Luminosity-Colour Relations for Red Clump Stars
• On the Origin of Metal-poor Stars in the Solar Neighborhood
• UV-excess sources with a red/IR-counterpart: low-mass companions, debris disks and QSO selection
• Absolute Magnitude Calibration for Red Clump Stars
• The Information Of The Milky Way From 2MASS Whole Sky Star Count: The Bimodal Color Distributions
• A Universal Vertical Stellar Density Distribution Law for the Galaxy