Search Publications
Carbon photochemistry at Mars: Updates with recent data
Yelle, Roger V.; Lillis, Robert J.; Lo, Daniel Y.
We provide a comprehensive characterization of the photochemistry behind atomic carbon in the Mars atmosphere. Using a one-dimensional photochemical model, with an extensive reaction list incorporating new high-resolution photodissociation cross-sections (Heays et al., 2017) and the recently experimentally confirmed CO2 + hν →C +O2…
Chromospheric activity of nearby Sun-like stars. R'HK index signature of a recent burst of star formation
Gondoin, P.
Context. The chromospheric emission in the cores of the Ca II H & K lines of late-type dwarfs is a well known indicator of magnetic activity that decreases with increasing stellar age.
Aims: I use this indicator to investigate the formation history of nearby G- and early K-type stars with origins at galactocentric distances similar to tha…
The Global Distribution of Ultralow-Frequency Waves in Jupiter's Magnetosphere
Masters, A.; Manners, H.
Jupiter's giant magnetosphere is a complex system seldom in a configuration approximating steady state, and a clear picture of its governing dynamics remains elusive. Crucial to understanding how the magnetosphere behaves on a large scale are disturbances to the system on length-scales comparable to the cavity, which are communicated by magnetohyd…
Small Bodies: Near and Far Database for thermal infrared observations of small bodies in the Solar System
Szakáts, Róbert; Marton, Gábor; Müller, Thomas +4 more
In this paper, we present the Small Bodies: Near and Far Infrared Database, an easy-to-use tool intended to facilitate the modelling of thermal emission of small bodies of the Solar System. Our database collects measurements of thermal emissions for small Solar System targets that are otherwise available in scattered sources and provides a complet…
HST/STIS Capability for Love Number Measurement of WASP-121b
Rauer, Heike; Csizmadia, Szilárd; Padovan, Sebastiano +2 more
Data from transit light curves, radial velocity, and transit timing observations can be used to probe the interiors of exoplanets beyond the mean density, by measuring the Love numbers h2 and k2. The first indirect estimate of k2 for an exoplanet from radial velocity and transit timing variation observations has be…
Imaging the 44 au Kuiper Belt Analog Debris Ring around HD 141569A with GPI Polarimetry
Matthews, Brenda C.; Duchêne, Gaspard; Esposito, Thomas M. +54 more
We present the first polarimetric detection of the inner disk component around the pre-main-sequence B9.5 star HD 141569A. Gemini Planet Imager H-band (1.65 µm) polarimetric differential imaging reveals the highest signal-to-noise ratio detection of this ring yet attained and traces structure inward to 0.″25 (28 au at a distance of 111 pc). …
Physical Conditions in Shocked Interstellar Gas Interacting with the Supernova Remnant IC 443
Jenkins, Edward B.; Ritchey, Adam M.; Federman, S. R. +3 more
We present the results of a detailed investigation into the physical conditions in interstellar material interacting with the supernova remnant (SNR) IC 443. Our analysis is based on a comprehensive examination of high-resolution far-ultraviolet spectra obtained with the Space Telescope Imaging Spectrograph onboard the Hubble Space Telescope of tw…
The EXOD search for faint transients in XMM-Newton observations: Method and discovery of four extragalactic Type I X-ray bursters
Webb, N. A.; van Leeuwen, J.; Pastor-Marazuela, I. +1 more
Context. The observations carried out with XMM-Newton have produced a very extensive X-ray source catalogue in which the standard pipeline determines the variability of sufficiently bright sources through χ2 and fractional variability tests. Faint sources, however, are not automatically checked for variability, and this means that faint…
The Nonstandard Properties of a "Standard" PWN: Unveiling the Mysteries of PWN G21.5-0.9 Using Its IR and X-Ray Emission
Gelfand, Joseph D.; Temim, Tea; Slane, Patrick O. +3 more
The evolution of a pulsar wind nebula (PWN) depends on properties of the progenitor star, supernova, and surrounding environment. As some of these quantities are difficult to measure, reproducing the observed dynamical properties and spectral energy distribution (SED) with an evolutionary model is often the best approach to estimating their values…
Data-Driven Classification of Coronal Hole and Streamer Belt Solar Wind
Macneil, Allan R.; Owens, Mathew; Bloch, Téo +2 more
We present two new solar wind origin classification schemes developed independently using unsupervised machine learning. The first scheme aims to classify solar wind into three types: coronal-hole wind, streamer-belt wind, and `unclassified' which does not fit into either of the previous two categories. The second scheme independently derives thre…