Search Results - "Reid, Mark J"
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A 2.4% DETERMINATION OF THE LOCAL VALUE OF THE HUBBLE CONSTANT
Published in The Astrophysical journal (20-07-2016)“…ABSTRACT We use the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) to reduce the uncertainty in the local value of the Hubble constant from…”
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Mapping spiral structure on the far side of the Milky Way
Published in Science (American Association for the Advancement of Science) (13-10-2017)“…Little is known about the portion of the Milky Way lying beyond the Galactic center at distances of more than 9 kiloparsec from the Sun. These regions are…”
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A VLBI resolution of the Pleiades distance controversy
Published in Science (American Association for the Advancement of Science) (29-08-2014)“…Because of its proximity and its youth, the Pleiades open cluster of stars has been extensively studied and serves as a cornerstone for our understanding of…”
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An Updated Reference Frame for the Galactic Inner Parsec
Published in The Astrophysical journal (01-10-2023)“…Abstract Infrared observations of stellar orbits about Sgr A* probe the mass distribution in the inner parsec of the Galaxy and provide definitive evidence for…”
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Noncircular Motions in the Outer Perseus Spiral Arm
Published in The Astrophysical journal (01-05-2019)“…We report measurements of parallax and proper motion for five 6.7 GHz methanol maser sources in the outer regions of the Perseus arm as part of the BeSSeL…”
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Precise Black Hole Masses from Megamaser Disks: Black Hole-Bulge Relations at Low Mass
Published in The Astrophysical journal (20-09-2010)“…The black hole (BH)-bulge correlations have greatly influenced the last decade of efforts to understand galaxy evolution. Current knowledge of these…”
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VLBA Trigonometric Parallax Measurement of the Semi-regular Variable RT Vir
Published in The Astrophysical journal (10-11-2017)“…We report a trigonometric parallax measurement of 22 GHz H2O masers toward the semi-regular variable RT Vir from multi-epoch Very Long Baseline Array…”
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THE INTRINSIC SHAPE OF SAGITTARIUS A AT 3.5 mm WAVELENGTH
Published in The Astrophysical journal (10-06-2016)“…ABSTRACT The radio emission from Sgr A is thought to be powered by accretion onto a supermassive black hole of at the Galactic Center. At millimeter…”
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Geometric Distance and Proper Motion of the Triangulum Galaxy (M33)
Published in Science (American Association for the Advancement of Science) (04-03-2005)“…We measured the angular rotation and proper motion of the Triangulum Galaxy (M33) with the Very Long Baseline Array by observing two H₂O masers on opposite…”
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A Milliarcsecond-accurate Position for Sagittarius A
Published in The Astrophysical journal (01-11-2022)“…Abstract The absolute position of Sgr A*, the compact radio source at the center of the Milky Way, had been uncertain by several tens of milliarcseconds. Here…”
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Cygnus X-1 contains a 21-solar mass black hole-Implications for massive star winds
Published in Science (American Association for the Advancement of Science) (05-03-2021)“…The evolution of massive stars is influenced by the mass lost to stellar winds over their lifetimes. These winds limit the masses of the stellar remnants (such…”
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A Very Long Baseline Array Trigonometric Parallax for RR Aql and the Mira Period–Luminosity Relation
Published in The Astrophysical journal (01-06-2022)“…Abstract We report Very Long Baseline Array observations of 22 GHz H 2 O and 43 GHz SiO masers toward the Mira variable RR Aql. By fitting the SiO maser…”
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Proper Motions of OH Masers and Magnetic Fields in Massive Star-forming Regions
Published in The Astrophysical journal (01-12-2007)“…We present data of proper motions of OH masers in the massive star-forming regions ON 1, K3-50, and W51 Main/South. OH maser motions in ON 1 are consistent…”
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The Mass of the Black Hole in Cygnus X-1
Published in The Astrophysical journal (01-12-2011)“…Cygnus X-1 is a binary star system that is comprised of a black hole and a massive giant companion star in a tight orbit. Building on our accurate distance…”
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Constraints on the Proper Motion of the Andromeda Galaxy Based on the Survival of Its Satellite M33
Published in The Astrophysical journal (10-11-2005)“…A major uncertainty in the dynamical history of the Local Group of galaxies originates from the unknown transverse speed of the Andromeda galaxy (M31) relative…”
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Comparison of Gaia DR2 Parallaxes of Stars with VLBI Astrometry
Published in The Astrophysical journal (20-04-2019)“…We compare the parallaxes of stars from VLBI astrometry in the literature to those in the Gaia DR2 catalog. Our full sample contains young stellar objects,…”
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CONFIRMATION VIA THE CONTINUUM-FITTING METHOD THAT THE SPIN OF THE BLACK HOLE IN CYGNUS X-1 IS EXTREME
Published in The Astrophysical journal (20-07-2014)“…In Gou et al., we reported that the black hole primary in the X-ray binary Cygnus X-1 is a near-extreme Kerr black hole with a spin parameter a sub(*) > 0.95…”
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Interstellar Hydroxyl Masers in the Galaxy. II. Zeeman Pairs and the Galactic Magnetic Field
Published in The Astrophysical journal (10-10-2003)Get full text
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The Trigonometric Parallax of Cygnus X-1
Published in The Astrophysical journal (01-12-2011)“…We report a direct and accurate measurement of the distance to the X-ray binary Cygnus X-1, which contains the first black hole to be discovered. The distance…”
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Radio Photospheres of Long-Period Variable Stars
Published in The Astrophysical journal (10-02-1997)Get full text
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