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The COS Absorption Survey of Baryon Harbors: The Galaxy Database and Cross-correlation Analysis of O VI Systems
Tripp, Todd M.; Prochaska, J. Xavier; Tejos, Nicolas +10 more
We describe the survey for galaxies in the fields surrounding nine sightlines to far-UV bright, z ∼ 1 quasars that define the COS Absorption Survey of Baryon Harbors (CASBaH) program. The photometry and spectroscopy that comprise the data set come from a mixture of public surveys (SDSS, DECaLS) and our dedicated efforts on private facilities (Keck…
From kpcs to the central parsec of NGC 1097: feeding star formation and a black hole at the same time
Bruzual, Gustavo; Burkert, Andreas; Prieto, M. Almudena +3 more
A panchromatic view of the star-forming ring and feeding process in the central kpc of the galaxy NGC 1097 is presented. The assembled IR to UV images at ∼10 pc resolution allow us to characterize the population of circa 250 clusters in the ring and disentangle the network of filaments of dust and gas that enshroud and feed them. The ring is a pla…
LISA Pathfinder micronewton cold gas thrusters: In-flight characterization
Mendes, L.; Russano, G.; Lloro, I. +76 more
The LISA Pathfinder (LPF) mission has demonstrated the ability to limit and measure the fluctuations in acceleration between two free falling test masses down to sub-femto-g levels. One of the key elements to achieve such a level of residual acceleration is the drag free control. In this scheme the spacecraft is used as a shield against any extern…
Three-dimensional dust mapping of 12 supernovae remnants in the Galactic anticentre
Zijlstra, A.; Jiang, B. W.; Chen, B. Q. +1 more
We present three-dimensional (3D) dust mapping of 12 supernova remnants (SNRs) in the Galactic anticentre (Galactic longitude l between 150° and 210°) based on a recent 3D interstellar extinction map. The dust distribution of the regions, which cover the full extents in the radio continuum for the individual SNRs, is discussed. Four SNRs show sign…
An estimate of the k2 Love number of WASP-18Ab from its radial velocity measurements
Csizmadia, Sz.; Smith, A. M. S.; Hellard, H.
Context. Increasing our knowledge of the interior structure, composition, and density distribution of exoplanets is crucial to make progress in the understanding of exoplanetary formation, migration and habitability. However, the directly measurable mass and radius values offer little constraint on interior structure, because the inverse problem i…
Subsurface Sediment Mobilization in the Southern Chryse Planitia on Mars
Hauber, E.; Michael, G.; Brož, P. +2 more
The southern part of the smooth plain of Chryse Planitia on Mars hosts a large population of kilometer-sized (from 0.2 to 20 km) landforms spread over a wide area. Based on the investigation of a small part of this area, Komatsu et al. (2016, https://doi.org/10.1016/j.icarus.2015.12.032) p…
Discovery of an X-Ray Quasar Wind Driving the Cold Gas Outflow in the Ultraluminous Infrared Galaxy IRAS F05189-2524
Veilleux, Sylvain; Tombesi, Francesco; Lohfink, Anne M. +2 more
We present new XMM-Newton and NuSTAR observations of the galaxy merger IRAS F05189-2524, which is classified as an ultraluminous infrared galaxy and optical Seyfert 2 at z = 0.0426. We test a variety of spectral models that yield a best fit consisting of an absorbed power law with emission and absorption features in the Fe K band. Remarkably, we f…
Statistical detection of a tidal stream associated with the globular cluster M68 using Gaia data
Miralda-Escudé, Jordi; Palau, Carles G.
A method to search for tidal streams and to fit their orbits based on maximum likelihood is presented and applied to the Gaia data. Tests of the method are performed showing how a simulated stream produced by tidal stripping of a star cluster is recovered when added to a simulation of the Gaia catalogue. The method can be applied to search for str…
Modeling Mg II During Solar Flares. I. Partial Frequency Redistribution, Opacity, and Coronal Irradiation
Kerr, Graham S.; Carlsson, Mats; Allred, Joel C.
The Interface Region Imaging Spectrograph has routinely observed the flaring Mg II near-ultraviolet (NUV) spectrum, offering excellent diagnostic potential and a window into the location of energy deposition. A number of studies have forward-modeled both the general properties of these lines and specific flare observations. Generally these have fo…
Characteristics of the Two Sequences Seen in the High-velocity Hertzsprung-Russell Diagram in Gaia DR2
Casagrande, Luca; Feltzing, Sofia; Sahlholdt, Christian L.
In this study we use a sample of about 9 million SkyMapper stars with metallicities to investigate the properties of the two stellar populations seen in the high-velocity (V T > 200 km s-1) Gaia DR2 Hertzsprung-Russell diagram. Based on 10,000 red giant branch (RGB) stars (out of 75,000 with high velocity), we find that th…