Search Publications
Evolution of the Thermodynamic Properties of Clusters of Galaxies out to Redshift of 1.8
Mahler, Guillaume; Kraft, Ralph; Khullar, Gourav +11 more
The thermodynamic properties of the hot plasma in galaxy clusters retain information on the processes leading to the formation and evolution of the gas in their deep, dark matter potential wells. These processes are dictated not only by gravity but also by gas physics, e.g., active galactic nucleus feedback and turbulence. In this work, we study t…
The Mass-Metallicity Relation at z 1-2 and Its Dependence on the Star Formation Rate
Papovich, Casey; Barro, Guillermo; Martin, Crystal L. +24 more
We present a new measurement of the gas-phase mass-metallicity relation (MZR) and its dependence on star formation rates (SFRs) at 1.3 < z < 2.3. Our sample comprises 1056 galaxies with a mean redshift of z = 1.9, identified from the Hubble Space Telescope Wide Field Camera 3 (WFC3) grism spectroscopy in the Cosmic Assembly Near-infrared Dee…
Gemini/GMOS optical transmission spectroscopy of WASP-121b: signs of variability in an ultra-hot Jupiter?
Nikolov, Nikolay; de Mooij, Ernst J. W.; Gibson, Neale P. +5 more
We present ground-based, spectroscopic observations of two transits of the ultra-hot Jupiter WASP-121b covering the wavelength range ≈500-950 nm using Gemini/GMOS. We use a Gaussian process framework to model instrumental systematics in the light curves, and also demonstrate the use of the more generalized Student's-T process to verify our results…
X-ray flux in SED modelling: An application of X-CIGALE in the XMM-XXL field
Ciesla, L.; Buat, V.; Boquien, M. +3 more
X-CIGALE is built on the spectral energy distribution (SED) code of CIGALE and implements important new features: the code accounts for obscuring material in the poles of AGNs and has the ability to fit X-ray fluxes. In this work, we used ∼2500 spectroscopic X-ray AGNs from the XMM-XXL-north field and examined the improvements the new features bri…
The kinematics of globular cluster populations in the E-MOSAICS simulations and their implications for the assembly history of the Milky Way
Kruijssen, J. M. Diederik; Trujillo-Gomez, Sebastian; Crain, Robert A. +5 more
We present a detailed comparison of the Milky Way (MW) globular cluster (GC) kinematics with the 25 MW-mass cosmological simulations from the E-MOSAICS project. While the MW falls within the kinematic distribution of GCs spanned by the simulations, the relative kinematics of its metal-rich ( $[\rm {Fe}/\rm {H}] \gt -1.2$ ) versus metal-poor ( $[\r…
Impacts of Ionospheric Ions on Magnetic Reconnection and Earth's Magnetosphere Dynamics
Lavraud, B.; André, M.; Kistler, L. M. +13 more
Ionospheric ions (mainly H+, He+, and O+) escape from the ionosphere and populate the Earth's magnetosphere. Their thermal energies are usually low when they first escape the ionosphere, typically a few electron volt to tens of electron volt, but they are energized in their journey through the magnetosphere. The io…
Measuring and Replicating the 1-20 µm Energy Distributions of the Coldest Brown Dwarfs: Rotating, Turbulent, and Nonadiabatic Atmospheres
Marley, Mark; Dupuy, Trent J.; Caselden, Dan +7 more
Cold, low-mass, field brown dwarfs are important for constraining the terminus of the stellar mass function, and also for optimizing atmospheric studies of exoplanets. In 2020 new model grids for such objects were made available: Sonora-Bobcat and ATMO 2020. Also, new candidate cold brown dwarfs were announced, and new spectroscopic observations a…
Threaded-field-line Model for the Low Solar Corona Powered by the Alfvén Wave Turbulence
Jin, Meng; Sokolov, Igor V.; Gombosi, Tamas I. +6 more
We present an updated global model of the solar corona, including the transition region. We simulate the realistic three-dimensional (3D) magnetic field using the data from the photospheric magnetic field measurements and assume the magnetohydrodynamic (MHD) Alfvén wave turbulence and its nonlinear dissipation to be the only source for heating the…
AGN feeding and feedback in Fornax A. Kinematical analysis of the multi-phase ISM
Gaspari, M.; Serra, P.; Smirnov, O. +10 more
We present a multi-wavelength study of the gaseous medium surrounding the nearby active galactic nucleus (AGN), Fornax A. Using MeerKAT, ALMA, and MUSE observations, we reveal a complex distribution of the atomic (H I), molecular (CO), and ionised gas in its centre and along the radio jets. By studying the multi-scale kinematics of the multi-phase…
GALExtin: an alternative online tool to determine the interstellar extinction in the Milky Way
Moitinho, André; Amôres, Eduardo B.; Jesus, Ricardo M. +6 more
Estimates of interstellar extinction are essential in a broad range of astronomical research. In the last decades, several maps and models of the large-scale interstellar extinction in the Galaxy have been published. However, these maps and models have been developed in different programming languages, with different user interfaces and input/outp…