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Thomas M. Dame - One of the best experts on this subject based on the ideXlab platform.
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PARALLAXES OF Star-Forming Regions IN THE OUTER SPIRAL ARM OF THE MILKY WAY
The Astrophysical Journal, 2015Co-Authors: K. Hachisuka, M. J. Reid, Andreas Brunthaler, Yoon Kyung Choi, Karl M. Menten, Alberto Sanna, Thomas M. DameAbstract:We report parallaxes and proper motions of three water maser sources in high-mass Star-Forming Regions in the Outer Spiral Arm of the Milky Way. The observations were conducted with the Very Long Baseline Array as part of Bar and Spiral Structure Legacy Survey and double the number of such measurements in the literature. The Outer Arm has a pitch angle of 14 degrees.9 +/- 2 degrees.7 and a Galactocentric distance of 14.1 +/- 0.6 kpc toward the Galactic anticenter. The average motion of these sources toward the Galactic center is 10.7 +/- 2.1 kms(-1) and we see no sign of a significant fall in the rotation curve out to 15 kpc from the Galactic center. The three-dimensional locations of these Star-Forming Regions are consistent with a Galactic warp of several hundred parsecs from the plane.
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parallaxes of Star Forming Regions in the outer spiral arm of the milky way
arXiv: Astrophysics of Galaxies, 2014Co-Authors: K. Hachisuka, M. J. Reid, K. M. Menten, Yoon Kyung Choi, Alberto Sanna, A Brunthaler, Thomas M. DameAbstract:We report parallaxes and proper motions of three water maser sources in high-mass Star-Forming Regions in the Outer Spiral Arm of the Milky Way. The observations were conducted with the Very Long Baseline Array as part of Bar and Spiral Structure Legacy Survey and double the number of such measurements in the literature. The Outer Arm has a pitch angle of 14.9 +/- 2.7 deg and a Galactocentric distance of 14.1 +/- 0.6 kpc toward the Galactic anticenter. The average motion of these sources toward the Galactic center is 10.7 +/- 2.1 km/s and we see no sign of a significant fall in the rotation curve out to 15 kpc from the Galactic center. The three-dimensional locations of these Star-Forming Regions are consistent with a Galactic warp of several hundred parsecs from the plane.
K. Hachisuka - One of the best experts on this subject based on the ideXlab platform.
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PARALLAXES OF Star-Forming Regions IN THE OUTER SPIRAL ARM OF THE MILKY WAY
The Astrophysical Journal, 2015Co-Authors: K. Hachisuka, M. J. Reid, Andreas Brunthaler, Yoon Kyung Choi, Karl M. Menten, Alberto Sanna, Thomas M. DameAbstract:We report parallaxes and proper motions of three water maser sources in high-mass Star-Forming Regions in the Outer Spiral Arm of the Milky Way. The observations were conducted with the Very Long Baseline Array as part of Bar and Spiral Structure Legacy Survey and double the number of such measurements in the literature. The Outer Arm has a pitch angle of 14 degrees.9 +/- 2 degrees.7 and a Galactocentric distance of 14.1 +/- 0.6 kpc toward the Galactic anticenter. The average motion of these sources toward the Galactic center is 10.7 +/- 2.1 kms(-1) and we see no sign of a significant fall in the rotation curve out to 15 kpc from the Galactic center. The three-dimensional locations of these Star-Forming Regions are consistent with a Galactic warp of several hundred parsecs from the plane.
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parallaxes of Star Forming Regions in the outer spiral arm of the milky way
arXiv: Astrophysics of Galaxies, 2014Co-Authors: K. Hachisuka, M. J. Reid, K. M. Menten, Yoon Kyung Choi, Alberto Sanna, A Brunthaler, Thomas M. DameAbstract:We report parallaxes and proper motions of three water maser sources in high-mass Star-Forming Regions in the Outer Spiral Arm of the Milky Way. The observations were conducted with the Very Long Baseline Array as part of Bar and Spiral Structure Legacy Survey and double the number of such measurements in the literature. The Outer Arm has a pitch angle of 14.9 +/- 2.7 deg and a Galactocentric distance of 14.1 +/- 0.6 kpc toward the Galactic anticenter. The average motion of these sources toward the Galactic center is 10.7 +/- 2.1 km/s and we see no sign of a significant fall in the rotation curve out to 15 kpc from the Galactic center. The three-dimensional locations of these Star-Forming Regions are consistent with a Galactic warp of several hundred parsecs from the plane.
M. J. Reid - One of the best experts on this subject based on the ideXlab platform.
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Astrometry of Star-Forming Regions in the Sagittarius spiral arm
Proceedings of 14th European VLBI Network Symposium & Users Meeting — PoS(EVN2018), 2019Co-Authors: K. L. J. Rygl, M. J. Reid, Andreas Brunthaler, K. M. MentenAbstract:We are now outlining the basic spiral structure of our Galaxy. This is not a trivial matter due to our location within the Galactic disk that causes any spiral structure to be superimposed within the line of sight. While radial velocity information can largely disentangle the various spiral arms, kinematic distances are not accurate enough for precise spiral structure studies. We measure the parallaxes and proper motions of water and 6.7 GHz methanol masers associated with Star-Forming Regions in the Sagittarius spiral arm, up to the distance of the tangential point of 5.4 kpc at a Galactic longitude of 49 degree, as part of the BeSSeL survey program. By combining these new astrometric data with previous measurements, we can study the distribution of high-mass Star-Forming Regions in this spiral arm. As the Sagittarius arm is one of the closest spiral arms to the Sun, the fractional parallax uncertainties are relatively small, permitting one to trace the three dimensional structure and velocities of the Star Forming Regions in the arm to ultimately compare these to spiral arm models and observations of other (face-on) galaxies.
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PARALLAXES OF Star-Forming Regions IN THE OUTER SPIRAL ARM OF THE MILKY WAY
The Astrophysical Journal, 2015Co-Authors: K. Hachisuka, M. J. Reid, Andreas Brunthaler, Yoon Kyung Choi, Karl M. Menten, Alberto Sanna, Thomas M. DameAbstract:We report parallaxes and proper motions of three water maser sources in high-mass Star-Forming Regions in the Outer Spiral Arm of the Milky Way. The observations were conducted with the Very Long Baseline Array as part of Bar and Spiral Structure Legacy Survey and double the number of such measurements in the literature. The Outer Arm has a pitch angle of 14 degrees.9 +/- 2 degrees.7 and a Galactocentric distance of 14.1 +/- 0.6 kpc toward the Galactic anticenter. The average motion of these sources toward the Galactic center is 10.7 +/- 2.1 kms(-1) and we see no sign of a significant fall in the rotation curve out to 15 kpc from the Galactic center. The three-dimensional locations of these Star-Forming Regions are consistent with a Galactic warp of several hundred parsecs from the plane.
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parallaxes of Star Forming Regions in the outer spiral arm of the milky way
arXiv: Astrophysics of Galaxies, 2014Co-Authors: K. Hachisuka, M. J. Reid, K. M. Menten, Yoon Kyung Choi, Alberto Sanna, A Brunthaler, Thomas M. DameAbstract:We report parallaxes and proper motions of three water maser sources in high-mass Star-Forming Regions in the Outer Spiral Arm of the Milky Way. The observations were conducted with the Very Long Baseline Array as part of Bar and Spiral Structure Legacy Survey and double the number of such measurements in the literature. The Outer Arm has a pitch angle of 14.9 +/- 2.7 deg and a Galactocentric distance of 14.1 +/- 0.6 kpc toward the Galactic anticenter. The average motion of these sources toward the Galactic center is 10.7 +/- 2.1 km/s and we see no sign of a significant fall in the rotation curve out to 15 kpc from the Galactic center. The three-dimensional locations of these Star-Forming Regions are consistent with a Galactic warp of several hundred parsecs from the plane.
Karl M. Menten - One of the best experts on this subject based on the ideXlab platform.
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PARALLAXES OF Star-Forming Regions IN THE OUTER SPIRAL ARM OF THE MILKY WAY
The Astrophysical Journal, 2015Co-Authors: K. Hachisuka, M. J. Reid, Andreas Brunthaler, Yoon Kyung Choi, Karl M. Menten, Alberto Sanna, Thomas M. DameAbstract:We report parallaxes and proper motions of three water maser sources in high-mass Star-Forming Regions in the Outer Spiral Arm of the Milky Way. The observations were conducted with the Very Long Baseline Array as part of Bar and Spiral Structure Legacy Survey and double the number of such measurements in the literature. The Outer Arm has a pitch angle of 14 degrees.9 +/- 2 degrees.7 and a Galactocentric distance of 14.1 +/- 0.6 kpc toward the Galactic anticenter. The average motion of these sources toward the Galactic center is 10.7 +/- 2.1 kms(-1) and we see no sign of a significant fall in the rotation curve out to 15 kpc from the Galactic center. The three-dimensional locations of these Star-Forming Regions are consistent with a Galactic warp of several hundred parsecs from the plane.
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CH3OH and H2O masers in high-mass Star-Forming Regions
Astronomy & Astrophysics, 2002Co-Authors: H. Beuther, P. Schilke, Andrew Walsh, T. K. Sridharan, Karl M. Menten, Friedrich WyrowskiAbstract:We present a comparison of ClassII CH3OH and H2O masers at high spatial resolution in a sample of 29 massive Star-Forming Regions. Absolute positions of both maser types are compared with mm dust continuum, cm continuum and mid-infrared sources. Spatial correlations of the different tracers and kinematic signatures are discussed.
Andreas Brunthaler - One of the best experts on this subject based on the ideXlab platform.
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Astrometry of Star-Forming Regions in the Sagittarius spiral arm
Proceedings of 14th European VLBI Network Symposium & Users Meeting — PoS(EVN2018), 2019Co-Authors: K. L. J. Rygl, M. J. Reid, Andreas Brunthaler, K. M. MentenAbstract:We are now outlining the basic spiral structure of our Galaxy. This is not a trivial matter due to our location within the Galactic disk that causes any spiral structure to be superimposed within the line of sight. While radial velocity information can largely disentangle the various spiral arms, kinematic distances are not accurate enough for precise spiral structure studies. We measure the parallaxes and proper motions of water and 6.7 GHz methanol masers associated with Star-Forming Regions in the Sagittarius spiral arm, up to the distance of the tangential point of 5.4 kpc at a Galactic longitude of 49 degree, as part of the BeSSeL survey program. By combining these new astrometric data with previous measurements, we can study the distribution of high-mass Star-Forming Regions in this spiral arm. As the Sagittarius arm is one of the closest spiral arms to the Sun, the fractional parallax uncertainties are relatively small, permitting one to trace the three dimensional structure and velocities of the Star Forming Regions in the arm to ultimately compare these to spiral arm models and observations of other (face-on) galaxies.
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PARALLAXES OF Star-Forming Regions IN THE OUTER SPIRAL ARM OF THE MILKY WAY
The Astrophysical Journal, 2015Co-Authors: K. Hachisuka, M. J. Reid, Andreas Brunthaler, Yoon Kyung Choi, Karl M. Menten, Alberto Sanna, Thomas M. DameAbstract:We report parallaxes and proper motions of three water maser sources in high-mass Star-Forming Regions in the Outer Spiral Arm of the Milky Way. The observations were conducted with the Very Long Baseline Array as part of Bar and Spiral Structure Legacy Survey and double the number of such measurements in the literature. The Outer Arm has a pitch angle of 14 degrees.9 +/- 2 degrees.7 and a Galactocentric distance of 14.1 +/- 0.6 kpc toward the Galactic anticenter. The average motion of these sources toward the Galactic center is 10.7 +/- 2.1 kms(-1) and we see no sign of a significant fall in the rotation curve out to 15 kpc from the Galactic center. The three-dimensional locations of these Star-Forming Regions are consistent with a Galactic warp of several hundred parsecs from the plane.
