Search Results - "Menten, Karl M."
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Astrophysical detection of the helium hydride ion HeH
Published in Nature (London) (18-04-2019)“…During the dawn of chemistry 1 , 2 , when the temperature of the young Universe had fallen below some 4,000 kelvin, the ions of the light elements produced in…”
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Spiral density waves in a young protoplanetary disk
Published in Science (American Association for the Advancement of Science) (30-09-2016)“…Gravitational forces are expected to excite spiral density waves in protoplanetary disks, disks of gas and dust orbiting young stars. However, previous…”
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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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Detection of a branched alkyl molecule in the interstellar medium: iso-propyl cyanide
Published in Science (American Association for the Advancement of Science) (26-09-2014)“…The largest noncyclic molecules detected in the interstellar medium (ISM) are organic with a straight-chain carbon backbone. We report an interstellar…”
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The 107 GHz Methanol Transition Is a Dasar in G0.253+0.016
Published in The Astrophysical journal (01-10-2023)“…Abstract We present observations of population anti-inversion in the 3 1 − 4 0 A + transition of CH 3 OH (methanol) at 107.013831 GHz toward the Galactic…”
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H2D+ observations give an age of at least one million years for a cloud core forming Sun-like stars
Published in Nature (London) (11-12-2014)“…Observations of emission and absorption lines of the deuterated trihydrogen cation (H 2 D + ) from a dense interstellar cloud core, combined with chemical…”
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Atlas of Cosmic-Ray-induced Astrochemistry
Published in The Astrophysical journal (20-11-2018)“…Cosmic rays are the primary initiators of interstellar chemistry, and getting a better understanding of the varying impact they have on the chemistry 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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Mass Assembly in Massive Star Formation: A Fragmentation Study of ATLASGAL Clumps
Published in The Astrophysical journal (01-05-2024)“…Abstract The mass assembly in star-forming regions arises from the hierarchical structure in molecular clouds in tandem with fragmentation at different scales…”
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A Stringent Limit on a Drifting Proton-to-Electron Mass Ratio from Alcohol in the Early Universe
Published in Science (American Association for the Advancement of Science) (04-01-2013)“…The standard model of physics is built on the fundamental constants of nature, but it does not provide an explanation for their values, nor require their…”
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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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Probing the Full CO Spectral Line Energy Distribution (SLED) in the Nuclear Region of a Quasar-starburst System at z = 6.003
Published in The Astrophysical journal (01-02-2020)“…We report Atacama Large Millimeter/submillimeter Array observations of CO(8-7), (9-8), , and and NOrthern Extended Millimeter Array observations of CO(5-4),…”
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Fire in the Heart: A Characterization of the High Kinetic Temperatures and Heating Sources in the Nucleus of NGC 253
Published in The Astrophysical journal (01-02-2019)“…The nuclear starburst within the central ∼15″ (∼250 pc; 1″ 17 pc) of NGC 253 has been extensively studied as a prototype for the starburst phase in galactic…”
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A REVERSE SHOCK IN GRB 160509A
Published in The Astrophysical journal (10-12-2016)“…ABSTRACT We present the second multi-frequency radio detection of a reverse shock in a γ-ray burst. By combining our extensive radio observations of the…”
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Gas Dynamics of a Luminous z = 6.13 Quasar ULAS J1319+0950 Revealed by ALMA High-resolution Observations
Published in The Astrophysical journal (20-08-2017)“…We present new Atacama Large Millimeter/submillimeter Array (ALMA) observations of the dust continuum and [C ii] 158 m fine structure line emission toward a…”
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Star Formation and ISM Properties in the Host Galaxies of Three Far-infrared Luminous Quasars at z ∼ 6
Published in The Astrophysical journal (10-05-2019)“…We present Karl G. Jansky Very Large Array observations of the CO (2−1) line emission toward three far-infrared luminous quasars at z ∼ 6: SDSS…”
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Molecular Gas in z ~ 6 Quasar Host Galaxies
Published in The Astrophysical journal (01-05-2010)“…We report our new observations of redshifted carbon monoxide emission from six z ~ 6 quasars, using the IRAM Plateau de Bure Interferometer. CO (6-5) or (5-4)…”
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First ALMA Light Curve Constrains Refreshed Reverse Shocks and Jet Magnetization in GRB 161219B
Published in The Astrophysical journal (01-08-2018)“…We present detailed multiwavelength observations of GRB 161219B at z = 0.1475, spanning the radio to X-ray regimes, and the first Atacama Large…”
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Ionized and Atomic Interstellar Medium in the z = 6.003 Quasar SDSS J2310+1855
Published in The Astrophysical journal (01-09-2020)“…Observing the interstellar medium (ISM) in the z 6 quasar host galaxies is essential for understanding the coevolution between supermassive black holes and…”
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Temperature Structure of the Pipe Nebula Studied by the Intensity Anomaly of the OH 18 cm Transition
Published in The Astrophysical journal (01-12-2020)“…Abstract We present observations of the four hyperfine structure components of the OH 18 cm transition (1612, 1665, 1667, and 1720 MHz) toward a filamentary…”
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