Search Publications
Action-based Dynamical Modeling for the Milky Way Disk: The Influence of Spiral Arms
Bovy, Jo; Rix, Hans-Walter; Trick, Wilma H. +1 more
RoadMapping is a dynamical modeling machinery developed to constrain the Milky Way’s (MW) gravitational potential by simultaneously fitting an axisymmetric parametrized potential and an action-based orbit distribution function (DF) to discrete 6D phase-space measurements of stars in the Galactic disk. In this work, we demonstrate RoadMapping's rob…
ALMA CO Clouds and Young Star Complexes in the Interacting Galaxies IC 2163 and NGC 2207
Brinks, Elias; Struck, Curtis; Elmegreen, Bruce G. +5 more
Atacama Large Millimeter Array (ALMA) observations of CO(1-0) emission in the interacting galaxies IC 2163 and NGC 2207 are used to determine the properties of molecular clouds and their association with star-forming regions observed with the Hubble Space Telescope. Half of the CO mass is in 249 clouds, each more massive than 4.0× {10}5…
Systematic error of the Gaia DR1 TGAS parallaxes from data for the red giant clump
Gontcharov, G. A.
Based on the Gaia DR1 TGAS parallaxes and photometry from the Tycho-2, Gaia, 2MASS, andWISE catalogues, we have produced a sample of 100 000 clump red giants within 800 pc of the Sun. The systematic variations of the mode of their absolute magnitude as a function of the distance, magnitude, and other parameters have been analyzed. We show that the…
XMM-Newton and NuSTAR Simultaneous X-Ray Observations of IGR J11215-5952
Tiengo, A.; Sidoli, L.; Natalucci, L. +3 more
We report the results of an XMM-Newton and NuSTAR coordinated observation of the Supergiant Fast X-ray Transient (SFXT) IGR J11215-5952, performed on 2016 February 14, during the expected peak of its brief outburst, which repeats every ∼165 days. Timing and spectral analysis were performed simultaneously in the energy band 0.4-78 keV. A spin perio…
Contribution of energetic and heavy ions to the plasma pressure: The 27 September to 3 October 2002 storm
Dandouras, I.; Daly, P. W.; Klecker, B. +5 more
Magnetospheric plasma sheet ions drift toward the Earth and populate the ring current. The ring current plasma pressure distorts the terrestrial internal magnetic field at the surface, and this disturbance strongly affects the strength of a magnetic storm. The contribution of energetic ions (>40 keV) and of heavy ions to the total plasma pressu…
Borexino's search for low-energy neutrino and antineutrino signals correlated with gamma-ray bursts
Wang, H.; Meyer, M.; Smirnov, O. +98 more
A search for neutrino and antineutrino events correlated with 2350 gamma-ray bursts (GRBs) is performed with Borexino data collected between December 2007 and November 2015. No statistically significant excess over background is observed. We look for electron antineutrinos (νbare) that inverse beta decay on protons with energies from 1.…
Molecular Gas Kinematics and Star Formation Properties of the Strongly-lensed Quasar Host Galaxy RXS J1131-1231
Riechers, Dominik A.; Pavesi, Riccardo; Leung, T. K. Daisy
We report observations of CO(J = 2 → 1) and {CO}(J=3\to 2) line emission toward the quadruply-lensed quasar RXS J1131-1231 at z = 0.654 obtained using the Plateau de Bure Interferometer (PdBI) and the Combined Array for Research in Millimeter-wave Astronomy (CARMA). Our lens modeling shows that the asymmetry in the double-horned CO(J = 2 → 1) line…
Spectroscopic study of the elusive globular cluster ESO452-SC11 and its surroundings
Hansen, Camilla Juul; Kunder, Andrea; Koch, Andreas
Globular clusters (GCs) have long been recognized as being amongst the oldest objects in the Galaxy. As such, they have the potential of playing a pivotal role in deciphering the Milky Way's early history. Here we present the first spectroscopic study of the low-mass system ESO452-SC11 using the AAOmega multifibre spectrograph at medium resolution…
The 1.1 mm Continuum Survey of the Small Magellanic Cloud: Physical Properties and Evolution of the Dust-selected Clouds
Kohno, Kotaro; Yun, Min S.; Kawabe, Ryohei +18 more
The first 1.1 mm continuum survey toward the Small Magellanic Cloud (SMC) was performed using the AzTEC instrument installed on the ASTE 10 m telescope. This survey covered 4.5 deg2 of the SMC with 1σ noise levels of 5-12 mJy beam-1, and 44 extended objects were identified. The 1.1 mm extended emission has good spatial correl…
The distance to the Galactic center determined by G, K, and M stars
Branham, Richard L.
The distance from the Sun to the center of the Galaxy