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Planets Across Space and Time (PAST). II. Catalog and Analyses of the LAMOST-Gaia-Kepler Stellar Kinematic Properties
Huang, Yang; Dong, Subo; Zong, Weikai +10 more
The Kepler telescope has discovered over 4000 planets (candidates) by searching ~200,000 stars over a wide range of distance (order of kpc) in our Galaxy. Characterizing the kinematic properties (e.g., Galactic component membership and kinematic age) of these Kepler targets (including the planet candidate hosts) is the first step toward studying K…
The Relativistic Jet Orientation and Host Galaxy of the Peculiar Blazar PKS 1413+135
Lähteenmäki, A.; Pearson, T. J.; Vedantham, H. K. +26 more
PKS 1413+135 is one of the most peculiar blazars known. Its strange properties led to the hypothesis almost four decades ago that it is gravitationally lensed by a mass concentration associated with an intervening galaxy. It exhibits symmetric achromatic variability, a rare form of variability that has been attributed to gravitational milli-lensin…
Identifying the Coronal Source Regions of Solar Wind Streams from Total Solar Eclipse Observations and in situ Measurements Extending over a Solar Cycle
Johnson, Judd; Habbal, Shadia R.; Druckmüller, Miloslav +7 more
This letter capitalizes on a unique set of total solar eclipse observations acquired between 2006 and 2020 in white light, Fe XI 789.2 nm (Tfexi = 1.2 ± 0.1 MK), and Fe XIV 530.3 nm (Tfexiv = 1.8 ± 0.1 MK) emission complemented by in situ Fe charge state and proton speed measurements from Advanced Composition Explorer/SWEPAM-…
Empirical Model of 10 - 130 MeV Solar Energetic Particle Spectra at 1 AU Based on Coronal Mass Ejection Speed and Direction
Richardson, Ian G.; Bruno, Alessandro
We present a new empirical model to predict solar energetic particle (SEP) event-integrated and peak intensity spectra between 10 and 130 MeV at 1 AU, based on multi-point spacecraft measurements from the Solar TErrestrial RElations Observatory (STEREO), the Geostationary Operational Environmental Satellites (GOES), and the Payload for Antimatter …
Oort cloud Ecology. I. Extra-solar Oort clouds and the origin of asteroidal interlopers
Portegies Zwart, S.
We simulate the formation and evolution of Oort clouds around the 200 nearest stars (within ∼16 pc according to the Gaia DR2) database. This study is performed by numerically integrating the planets and minor bodies in orbit around the parent star and in the Galactic potential. The calculations start 1 Gyr ago and continue for 100 Myr into the fut…
Detection of Flare-associated CME Candidates on Two M-dwarfs by GWAC and Fast, Time-resolved Spectroscopic Follow-ups
Wang, J.; Li, H. L.; Xin, L. P. +8 more
The flare-associated stellar coronal mass ejections (CMEs) of solar-like and late-type stars profoundly impact the habitability of any expolanets in the systems. In this paper, we report the detection of flare-associated CMEs for two M-dwarfs, thanks to a high-cadence survey carried out by the Ground Wide-angle Camera system and fast photometric a…
The MURALES survey. IV. Searching for nuclear outflows in 3C radio galaxies at z < 0.3 with MUSE observations
Marconi, A.; Capetti, A.; Grandi, P. +13 more
We analyze VLT/MUSE observations of 37 radio galaxies from the Third Cambridge catalogue (3C) with redshift < 0.3 searching for nuclear outflows of ionized gas. These observations are part of the MURALES project (a MUse RAdio Loud Emission line Snapshot survey), whose main goal is to explore the feedback process in the most powerful radio-loud …
Martian Hydrated Minerals: A Significant Water Sink
Jakosky, Bruce M.; Wernicke, Liza J.
Quantifying the water in all Martian water reservoirs is important for understanding the history of water on Mars, including Mars' past climate and potential for habitability. Hydrated minerals are widespread on Mars and may comprise a significant portion of the water inventory. We calculated the possible volumes of water stored within and require…
Constraining planetesimal stirring: how sharp are debris disc edges?
Marino, Sebastian
The dust production in debris discs by grinding collisions of planetesimals requires their orbits to be stirred. However, stirring levels remain largely unconstrained, and consequently the stirring mechanisms as well. This work shows how the sharpness of the outer edge of discs can be used to constrain the stirring levels. Namely, the sharper the …
One of Everything: The Breakthrough Listen Exotica Catalog
DeBoer, David; Gajjar, Vishal; Siemion, Andrew P. V. +12 more
We present Breakthrough Listen's Exotica Catalog as the centerpiece of our efforts to expand the diversity of targets surveyed in the Search for Extraterrestrial Intelligence (SETI). As motivation, we introduce the concept of survey breadth, the diversity of objects observed during a program. Several reasons for pursuing a broad program are given,…