Astrometry of Galactic Star Forming Region Sharpless 269 with VERA : Parallax Measurements and Constraint on Outer Rotation Curve

Abstract

We have performed high-precision astrometry of H2O maser sources in Galactic star forming region Sharpless 269 (S269) with VERA. We have successfully detected a trigonometric parallax of 189+/-8 micro-arcsec, corresponding to the source distance of 5.28 +0.24/-0.22 kpc. This is the smallest parallax ever measured, and the first one detected beyond 5 kpc. The source distance as well as proper motions are used to constrain the outer rotation curve of the Galaxy, demonstrating that the difference of rotation velocities at the Sun and at S269 (which is 13.1 kpc away from the Galaxy's center) is less than 3%. This gives the strongest constraint on the flatness of the outer rotation curve and provides a direct confirmation on the existence of large amount of dark matter in the Galaxy's outer disk.

arXiv comment7 pages and 4 figures, Accepted by PASJ (Vol. 59, No. 5, October 25, 2007 issue)

References in corpus (7)

• Local stellar kinematics from Hipparcos data
• Rotation Curves of Spiral Galaxies
• The Proper Motion of Sgr A*: II. The Mass of Sgr A*
• The Distance to the Perseus Spiral Arm in the Milky Way
• Water maser motions in W3(OH) and a determination of its distance
• Refining the Oort and Galactic constants
• First Fringe Detection with VERA's Dual-Beam System and its Phase Referencing Capability

Cited by in corpus (88)

• The Galaxy in Context: Structural, Kinematic and Integrated Properties
• Trigonometric Parallaxes of High Mass Star Forming Regions: the Structure and Kinematics of the Milky Way
• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• Trigonometric Parallaxes Of High-Mass Star Forming Regions: Our View Of The Milky Way
• The WISE Catalog of Galactic HII Regions
• Unified Rotation Curve of the Galaxy -- Decomposition into de Vaucouleurs Bulge, Disk, Dark Halo, and the 9-kpc Rotation Dip --
• The observed spiral structure of the Milky Way
• Astrometry of Water Maser Sources in Nearby Molecular Clouds with VERA - II. SVS 13 in NGC 1333
• Chemodynamical Simulations of the Milky Way Galaxy
• A Trigonometric Parallax of Sgr B2
• Kinematics of the stellar halo and the mass distribution of the Milky Way using BHB stars
• Micro-Arcsecond Radio Astrometry
• Trigonometric Parallax of W51 Main/South
• Distance to Orion KL Measured with VERA
• Fundamental Parameters of the Milky Way Galaxy Based on VLBI astrometry
• The Bar and Spiral Structure Legacy (BeSSeL) Survey: Mapping the Milky Way with VLBI Astrometry
• Trigonometric Parallaxes of 6.7 GHz Methanol Masers
• Trigonometric parallaxes of star forming regions in the Sagittarius spiral arm
• Rotation Curve of the Milky Way out to $\sim$ 200 kpc
• A Grand Rotation Curve and Dark Matter Halo in the Milky Way Galaxy
• The origin of large peculiar motions of star-forming regions and spiral structures of our Galaxy
• The First VERA Astrometry Catalog
• Distance to VY Canis Majoris with VERA
• The local spiral structure of the Milky Way
• A comparison of the local spiral structure from Gaia DR2 and VLBI maser parallaxes
• Spectrophotometric Distances to Galactic H\,{\sc{ii}} Regions
• Astrometry of H${}_2$O Masers in Nearby Star-Forming Regions with VERA --- IV. L1448C
• Rotation and Mass in the Milky Way and Spiral Galaxies
• Astrometry of H${}_2$O Masers in Nearby Star-Forming Regions with VERA. III. IRAS 22198+6336 in L1204G
• Metallicity Structure in the Milky Way Disk Revealed by Galactic HII Regions
• The Rotation Curve, Mass Distribution and Dark Matter Content of the Milky Way from Classical Cepheids
• Parallaxes of Star Forming Regions in the Outer Spiral Arm of the Milky Way
• Direct diagnostics of forming massive stars: stellar pulsation and periodic variability of maser sources
• The spiral structure of the Milky Way
• Major structures of the inner Galaxy delineated by 6.7-GHz methanol masers
• A strong radio brightening at the jet base of M87 during the elevated very-high-energy gamma-ray state in 2012
• The Galactic spiral structure as revealed by O- and early B-type stars
• Compatibility of DAMA/LIBRA dark matter detection with other searches in light of new Galactic rotation velocity measurements
• Distance to NGC 281 in a Galactic Fragmenting Superbubble: Parallax Measurements with VERA
• The distance to a star forming region in the Outer arm of the Galaxy
• The almost ubiquitous association of 6.7 GHz methanol masers with dust
• Astrometry of Galactic Star-Forming Region ON2N with VERA: Estimation of the Galactic Constants
• Distance to G14.33-0.64 in the Sagittarius Spiral Arm: H2O Maser Trigonometric Parallax with VERA
• Outer Rotation Curve of the Galaxy with VERA I: Trigonometric parallax of IRAS 05168+3634
• The Mass Distribution and Rotation Curve in the Galaxy
• Tracing the Galactic spiral structure with embedded clusters
• Pseudo Rotation Curve connecting the Galaxy, Dark Halo, and Local Group
• The scaling relations and star formation laws of ministarburst complexes
• VLBI Astrometry of AGB Variables with VERA -- A Semiregular Variable S Crateris --
• First Parallax Measurements Towards a 6.7 GHz Methanol Maser with the Australian Long Baseline Array - Distance to G339.884-1.259
• Redetermination of Galactic Spiral Density Wave Parameters Based on Spectral Analysis of Maser Radial Velocities
• Astrometry of H${}_2$O masers in the massive star--forming region IRAS 06061+2151 with VERA
• Trigonometric Parallaxes of Massive Star-Forming Regions. IX. The Outer Arm in the First Quadrant
• New Distance and Revised Natures of High Mass Star Formation in G5.89-0.39
• Astrometry of Galactic Star-Forming Region Onsala 1 with VERA: Estimation of Angular Velocity of Galactic Rotation at Sun
• A Galactic survey of radio jets from massive protostars
• Annual Parallax Distance to the K-type star system IRAS 22480+6002 measured with VERA
• Parallax of a Mira variable R Ursae Majoris studied with astrometric VLBI
• VLBI Astrometry of the Semiregular Variable RX Bootis
• Astrometry of Star Forming Region IRAS 05137+3919 in the far outer Galaxy
• VLBI Astrometry of AGB Variables with VERA -- A Mira Type Variable T Lepus
• Accuracy Diagrams for the Galactic Rotation Curve and Kinematical Distances
• High Resolution Radio Astronomy Using Very Long Baseline Interferometry
• 6.7 GHz variability characteristics of new periodic methanol maser sources
• HI Absorption Toward HII Regions at Small Galactic Longitudes
• Towards a census of the Galactic anticentre star clusters - III: tracing the spiral structure in the Outer Disk
• Annual Parallax Distance and Secular Motion of the Water Fountain Source IRAS 18286-0959
• H2O maser motions and the distance of the star forming region G192.16-3.84
• The Stellar Content of Obscured Galactic Giant HII Regions. VII. W3
• Near-Solar-Circle Method for Determination of the Galactic Constants
• Intermittent maser flare around the high mass young stellar object G353.273+0.641 I: data & overview
• Distance and proper motion measurement of water masers in Shapless 269 IRS 2w
• Properties of Galactic Dark Matter: Constraints from Astronomical Observations
• Resolving the distance controversy for Sharpless 269: A possible kink in the outer arm
• A Sino-German 6cm polarisation survey of the Galactic plane IX. HII regions
• Absolute Proper Motion of IRAS 00259+5625 with VERA : Indication of Superbubble Expansion Motion
• A New Multi-Tracer Approach to Defining the Spiral arm width in the Milky Way
• Trigonometric Parallax of IRAS 22555+6213 with VERA: 3-Dimensional View of Sources Along the Same Line of Sight
• A Multi-Epoch Study of Radio Continuum Emission from MassiveProtostars
• Inverse MultiView II: Microarcsecond Trigonometric Parallaxes for Southern Hemisphere 6.7~GHz Methanol Masers G232.62+00.99 and G323.74$-$00.26
• Internal Motion of 6.7-GHz Methanol Masers in H II Region S269
• Analysis of H2O Masers in Sharpless 269 using VERA Archival data --- Effect of maser structures on astrometric accuracy
• Probing Precise Location of Radio Core in TeV Blazar Mrk 501 with VERA at 43 GHz
• Interarm islands in the Milky Way -- the one near the Cygnus spiral arm
• Note on Inversion Formula to Determine Binary Elements by Astrometry
• The Origem Loop
• Rotation Curve of the Milky Way and the Dark Matter Density
• First Trigonometric Parallax Measurements with the KVN and VERA Array (KaVA)