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When the Peas Jump around the Pod: How Stellar Clustering Affects the Observed Correlations between Planet Properties in Multiplanet Systems
Kruijssen, J. M. Diederik; Longmore, Steven N.; Chevance, Mélanie
Recent studies have shown that the radii and masses of adjacent planets within a planetary system are correlated. It is unknown how this "peas-in-a-pod" phenomenon originates, whether it is in place at birth or requires evolution, and whether it (initially) applies only to neighboring planets or to all planets within a system. Here we address thes…
Magnetic Helicity Estimations in Models and Observations of the Solar Magnetic Field. IV. Application to Solar Observations
Liu, Y.; Guo, Y.; Pariat, E. +9 more
In this ISSI-supported series of studies on magnetic helicity in the Sun, we systematically implement different magnetic helicity calculation methods on high-quality solar magnetogram observations. We apply finite-volume, discrete flux tube (in particular, connectivity-based) and flux-integration methods to data from Hinode's Solar Optical Telesco…
HYPERS simulations of solar wind interactions with the Earth's magnetosphere and the Moon
Chen, Li-Jen; Roytershteyn, Vadim; Omelchenko, Yuri A. +2 more
The hybrid simulations, where the ions are treated kinetically and the electrons as a fluid, seek to describe ion microphysics with maximum physical fidelity. The hybrid approach addresses the fundamental need for space plasma models to incorporate physics beyond magnetohydrodynamics. Global hybrid simulations must account for a wide range of both…
Multi-tracer analysis of straight depolarisation canals in the surroundings of the 3C 196 field
Haverkorn, Marijke; Turić, Luka; Jelić, Vibor +6 more
Context. Faraday tomography of a field centred on the extragalactic point source 3C 196 with the LOw Frequency ARray (LOFAR) revealed an intertwined structure of diffuse polarised emission with straight depolarisation canals and tracers of the magnetised and multi-phase interstellar medium (ISM), such as dust and line emission from atomic hydrogen…
NEMESIS: Exoplanet Transit Survey of Nearby M-dwarfs in TESS FFIs. I.
Feliz, Dax L.; Stassun, Keivan G.; Collins, Kevin I. +4 more
In this work, we present an analysis of 33,054 M-dwarf stars, located within 100 parsecs, via the Transiting Exoplanet Survey Satellite (TESS) full-frame images (FFIs) of observed sectors 1-5. We present a new pipeline called NEMESIS, developed to extract detrended photometry, and to perform transit searches of single-sector data in TESS FFIs. As …
Progenitor mass distribution for 22 historic core-collapse supernovae
Dolphin, Andrew E.; Williams, Benjamin F.; Dalcanton, Julianne J. +2 more
We infer the progenitor mass distribution for 22 historic core-collapse supernovae (CCSNe) using a Bayesian hierarchical model. For this inference, we use the local star formation histories to estimate the age for each supernova (SN). These star formation histories often show multiple bursts of star formation; our model assumes that one burst is a…
Quantifying the Lobe Reconnection Rate During Dominant IMF By Periods and Different Dipole Tilt Orientations
Østgaard, N.; Reistad, J. P.; Laundal, K. M. +5 more
Lobe reconnection is usually thought to play an important role in geospace dynamics only when the Interplanetary Magnetic Field (IMF) is mainly northward. This is because the most common and unambiguous signature of lobe reconnection is the strong sunward convection in the polar cap ionosphere observed during these conditions. During more typical …
The structure of the Milky Way based on unWISE 3.4 µm integrated photometry
Mosenkov, Aleksandr V.; Camps, Peter; Savchenko, Sergey S. +1 more
We present a detailed analysis of the Galaxy structure using an unWISE wide-field image at $3.4\,\mu$m. We perform a 3D photometric decomposition of the Milky Way taking into account (i) the projection of the Galaxy on the celestial sphere and (ii) that the observer is located within the Galaxy at the solar radius. We consider a large set of photo…
A panoramic view of the Local Group dwarf galaxy NGC 6822
Mackey, Dougal; Da Costa, Gary S.; Zhang, Shumeng
We present a panoramic survey of the isolated Local Group dwarf irregular galaxy NGC 6822. Our photometry reaches ~2-3 mag deeper than most previous studies and spans the widest area around the dwarf compared to any prior work. We observe no stellar overdensities in the outskirts of NGC 6822 to V ~ 30 mag arcsec-2 and a projected radius…
First-year ion-acoustic wave observations in the solar wind by the RPW/TDS instrument on board Solar Orbiter
Maksimovic, M.; Bale, S. D.; Chust, T. +21 more
Context. Electric field measurements of the Time Domain Sampler (TDS) receiver, part of the Radio and Plasma Waves (RPW) instrument on board Solar Orbiter, often exhibit very intense broadband wave emissions at frequencies below 20 kHz in the spacecraft frame. During the first year of the mission, the RPW/TDS instrument was operating from the firs…