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

Abstract

The extinction law from $0.9$ to $8$ microns in the inner $3\times 3$ deg${}^2$ of the Milky Way is measured using data from VISTA Variables in the Via Lactea, GLIMPSE and WISE. Absolute extinction ratios are found by requiring that the observed red clump density peaks at the GRAVITY collaboration distance to the Galactic centre. When combined with selective extinction ratios measured from the bulge giant colour-colour diagrams, we find an extinction law of $A_Z:A_Y:A_J:A_H:A_{K_s}:A_{W1}:A_{[3.6]}:A_{[4.5]}:A_{W2}:A_{[5.8]}:A_{[8.0]}=7.19(0.30):5.11(0.20):3.23(0.11):1.77(0.04):1:0.54(0.02):0.46(0.03):0.34(0.03):0.32(0.03):0.24(0.04):0.28(0.03)$ valid for low extinctions where non-linearities are unimportant. These results imply an extinction law from the Rayleigh Jeans colour excess method (RJCE) of $A_{K_s}=0.677(H-[4.5]-0.188)$. We find little evidence for significant selective extinction ratio variation over the inspected region (around $5\%$). Assuming the absolute extinction ratios do not vary across the inspected region gives an independent measurement of the absolute $K_s$ magnitude of the red clump at the Galactic Centre of $(-1.61\pm 0.07)\mathrm{mag}$. This is very similar to the value measured for solar neighbourhood red clump stars giving confidence in the use of red clump stars as standard candles across the Galaxy. As part of our analysis, we inspect the completeness of PSF photometry from the VVV survey using artificial star tests, finding $90\%$ completeness at $K_s\approx 16(17)$ in high (low) density regions and good agreement with the number counts with respect to the GALACTICNUCLEUS and DECAPS catalogues over small regions of the survey.

arXiv comment18 pages, 16 figures, accepted for publication in MNRAS

References in corpus (101)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Astropy: A Community Python Package for Astronomy
• The NumPy array: a structure for efficient numerical computation
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• On the variation of the Initial Mass Function
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• Correcting for the Effects of Interstellar Extinction
• The Sixteenth Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra
• Theoretical isochrones in several photometric systems I. Johnson-Cousins-Glass, HST/WFPC2, HST/NICMOS, Washington, and ESO Imaging Survey filter sets
• A new generation of PARSEC-COLIBRI stellar isochrones including the TP-AGB phase
• The Wavelength Dependence of Interstellar Extinction from 1.25 to 8.0 microns Using GLIMPSE Data
• A geometric distance measurement to the Galactic Center black hole with 0.3% uncertainty
• ASPCAP: The Apogee Stellar Parameter and Chemical Abundances Pipeline
• Improving PARSEC models for very low mass stars
• PARSEC evolutionary tracks of massive stars up to $350M_{\odot }$ at metallicities 0.0001$\le Z\le$0.04
• New PARSEC evolutionary tracks of massive stars at low metallicity: testing canonical stellar evolution in nearby star forming dwarf galaxies
• Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. V. Evidence for a wide age distribution and a complex MDF
• The Nuclear Bulge of the Galaxy. III. Large-Scale Physical Characteristics of Stars and Interstellar Matter
• The Optical to Mid-Infrared Extinction Law Based on the APOGEE, Gaia DR2, Pan-STARRS1, SDSS, APASS, 2MASS and WISE Surveys
• Age and Metallicity Distribution of the Galactic Bulge from Extensive Optical and Near-IR Stellar Photometry
• VVV DR1: The First Data Release of the Milky Way Bulge and Southern Plane from the Near-Infrared ESO Public Survey VISTA Variables in the Via Lactea
• Mapping the Three-Dimensional Density of the Galactic Bulge with VVV Red Clump Stars
• The unWISE Catalog: Two Billion Infrared Sources from Five Years of WISE Imaging
• The Structure of the Milky Way's Bar Outside the Bulge
• Interstellar Extinction Law toward the Galactic Center III: J, H, Ks bands in the 2MASS and the MKO systems, and 3.6, 4.5, 5.8, 8.0 micron in the Spitzer/IRAC system
• Distance to M31 With the HST and Hipparcos Red Clump Stars
• ARGOS III: Stellar Populations in the Galactic Bulge of the Milky Way
• Two Red Clumps and the X-Shaped Milky Way Bulge
• Population effects on the Red Giant Clump absolute magnitude, and distance determinations to nearby galaxies
• Line derived infrared extinction towards the Galactic Center
• Galactocentric Distance With the OGLE and Hipparcos Red Clump Stars
• The Optical-Infrared Extinction Curve and its Variation in the Milky Way
• Modelling the Galactic Bar Using Red Clump Giants
• The APOGEE red-clump catalog: Precise distances, velocities, and high-resolution elemental abundances over a large area of the Milky Way's disk
• K-Band Calibration of the Red Clump Luminosity
• Life in the fast lane: a direct view of the dynamics, formation, and evolution of the Milky Way's bar
• Color-Magnitude Diagram Distribution of the Bulge Red Clump Stars - Evidence for the Galactic Bar
• Lifting the Dusty Veil With Near- and Mid-Infrared Photometry: I. Description and Applications of the Rayleigh-Jeans Color Excess Method
• Improved GRAVITY astrometric accuracy from modeling of optical aberrations
• The Mid-Infrared Extinction Law in the Ophiuchus, Perseus, and Serpens Molecular Clouds
• Modelling the Galactic bar using OGLE-II Red Clump Giant Stars
• The structure of the Galactic bar
• Interstellar Extinction Law toward the Galactic Center II: V, J, H, and Ks Bands
• The GIRAFFE Inner Bulge Survey (GIBS) III. Metallicity distributions and kinematics of 26 Galactic bulge fields
• The DECam Plane Survey: Optical photometry of two billion objects in the southern Galactic plane
• VIRAC: The VVV Infrared Astrometric Catalogue
• The Gaia-ESO Survey: metallicity and kinematic trends in the Milky Way bulge
• The VISTA ZYJHKs Photometric System: Calibration from 2MASS
• The GIRAFFE Inner Bulge Survey (GIBS). I. Survey Description and a kinematical map of the Milky Way bulge
• Reddening and metallicity maps of the Milky Way Bulge from VVV and 2MASS. I.The method and minor axis maps
• Early formation and recent starburst activity in the nuclear disc of the Milky Way
• Reddening and metallicity maps of the Milky Way bulge from VVV and 2MASS III. The first global photometric metallicity map of the Galactic bulge
• Gas flow in barred potentials - III. Effects of varying the Quadrupole
• Lifting the Dusty Veil II: A Large-Scale Study of the Galactic Infrared Extinction Law
• The Slope of the Near Infrared Extinction Law
• Three classical Cepheid variable stars in the nuclear bulge of the Milky Way
• The nuclear cluster of the Milky Way: Our primary testbed for the interaction of a dense star cluster with a massive black hole
• Mapping the Milky Way bulge at high resolution: the 3D dust extinction, CO, and X factor maps
• The Distance to the Galactic Center Derived From Infrared Photometry of Bulge Red Clump Stars
• Extinction ratios in the inner Galaxy as revealed by the VVV survey
• GALACTICNUCLEUS: A high angular resolution $JH{K}_s$ imaging survey of the Galactic Centre. I. Methodology, performance, and near-infrared extinction towards the Galactic Centre
• A new LMC K-band distance from precision measurements of nearby red clump stars
• Point Sources from a Spitzer IRAC Survey of the Galactic Center
• Spatial variations in the Milky Way disc metallicity-age relation
• Empirical photometric calibration of the Gaia Red Clump: colours, effective temperature and absolute magnitude
• Mid-Infrared Extinction and its Variation with Galactic Longitude
• How Many Components? Quantifying the Complexity of the Metallicity Distribution in the Milky Way Bulge with APOGEE
• K-Band Red Clump Distance to the Large Magellanic Cloud
• Milky Way demographics with the VVV survey. IV. PSF photometry from almost one billion stars in the Galactic bulge and adjacent southern disk
• Red clump stars and Gaia: Calibration of the standard candle using a hierarchical probabilistic model
• Star formation history of the Galactic bulge from deep HST imaging of low reddening windows
• GALACTICNUCLEUS: A high-angular-resolution JHKs imaging survey of the Galactic centre II. First data release of the catalogue and the most detailed CMDs of the GC
• A parametric description of the 3D structure of the Galactic Bar/Bulge using the VVV survey
• New constraints on the structure of the nuclear stellar cluster of the Milky Way from star counts and MIR imaging
• Magnetically Confined Interstellar Hot Plasma in the Nuclear Bulge of our Galaxy
• The ARAUCARIA project: Deep near-infrared survey of nearby galaxies. I. The distance to the Large Magellanic Cloud from K-band photometry of red clump stars
• Mapping the Galactic disk with the LAMOST and Gaia Red clump sample: I: precise distances, masses, ages and 3D velocities of $\sim$ 140000 red clump stars
• The Gaia DR2 parallax zero point: Hierarchical modeling of red clump stars
• Testing asteroseismology with Gaia DR2: Hierarchical models of the Red Clump
• Kinematic Detection of the Galactic Nuclear Disc
• A lack of classical Cepheids in the inner part of the Galactic disk
• The inner two degrees of the Milky Way. Evidence of a chemical difference between the Galactic Center and the surrounding inner bulge stellar populations
• Transverse kinematics of the Galactic bar-bulge from VVV and Gaia
• Exploring the stellar age distribution of the Milky Way Bulge using APOGEE
• Mapping the stellar age of the Milky Way bulge with the VVV. III. High resolution reddening map
• The VMC Survey -- XLII. Near-infrared period-luminosity relations for RR Lyrae stars and the structure of the Large Magellanic Cloud
• GALACTICNUCLEUS: A high-angular-resolution $JH{K}_s$ imaging survey of the Galactic centre. IV. Extinction maps and de-reddened photometry
• GALACTICNUCLEUS: A high-angular-resolution JHKs imaging survey of the Galactic centre III. Evidence for wavelength dependence of the extinction curve in the near-infrared
• On the optimal calibration of VVV photometry
• The Optical/Near-Infrared Extinction Law In Highly Reddened Regions
• Variability of the near-infrared extinction curve towards the Galactic centre
• Into the Darkness: Classical and Type II Cepheids in the Zona Galactica Incognita
• Galactic extinction laws: I. A global NIR analysis with 2MASS photometry
• Absolute Magnitudes of Seismic Red Clumps in the Kepler Field and SAGA: the age dependency of the distance scale
• An extremely low mid-infrared extinction law toward the Galactic Center and 4% distance precision to 55 classical Cepheids
• Variable star classification across the Galactic bulge and disc with the VISTA Variables in the Vía Láctea survey
• Impact of distance determinations on Galactic structure. I. Young and intermediate-age tracers
• Near-infrared spectroscopic observations of massive young stellar object candidates in the Central Molecular Zone
• MOC - HEALPix Multi-Order Coverage map Version 1.0
• A Color-Excess Extinction map of the Southern Galactic disk from the VVV and GLIMPSE Surveys

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• Variable stars in the VVV globular clusters. II. NGC6441, NGC6569, NGC6626 (M28), NGC6656 (M22), 2MASS-GC02, and Terzan10
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