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Cloud-by-cloud multiphase investigation of the circumgalactic medium of low-redshift galaxies
Richter, Philipp; Charlton, Jane C.; Kacprzak, Glenn G. +10 more
The pervasive presence of warm gas in galaxy haloes suggests that the circumgalactic medium (CGM) is multiphase in its ionization structure and complex in its kinematics. Some recent state-of-the-art cosmological galaxy simulations predict an azimuthal dependence of CGM metallicities. We investigate the presence of such a trend by analysing the di…
The Type I superluminous supernova catalogue I: light-curve properties, models, and catalogue description
Rest, Armin; Villar, V. Ashley; Eftekhari, Tarraneh +25 more
We present the most comprehensive catalogue to date of Type I superluminous supernovae (SLSNe), a class of stripped-envelope supernovae (SNe) characterized by exceptionally high luminosities. We have compiled a sample of 262 SLSNe reported through 2022 December 31. We verified the spectroscopic classification of each SLSN and collated an exhaustiv…
Strong size evolution of disc galaxies since z = 1. Readdressing galaxy growth using a physically motivated size indicator
Trujillo, Ignacio; Buitrago, Fernando
Our understanding of how the size of galaxies has evolved over cosmic time is based on the use of the half-light (effective) radius as a size indicator. Although the half-light radius has many advantages for structurally parameterising galaxies, it does not provide a measure of the global extent of the objects, but only an indication of the size o…
Global-scale magnetosphere convection driven by dayside magnetic reconnection
Branduardi-Raymont, Graziella; Wang, Chi; Dai, Lei +8 more
Plasma convection on a global scale is a fundamental feature of planetary magnetosphere. The Dungey cycle explains that steady-state convection within the closed part of the magnetosphere relies on magnetic reconnection in the nightside magnetospheric tail. Nevertheless, time-dependent models of the Dungey cycle suggest an alternative scenario whe…
CHEOPS in-flight performance. A comprehensive look at the first 3.5 yr of operations
Guterman, P.; Alonso, R.; Deleuil, M. +128 more
Context. Since the discovery of the first exoplanet almost three decades ago, the number of known exoplanets has increased dramatically. By beginning of the 2000s it was clear that dedicated facilities to advance our studies in this field were needed. The CHaracterising ExOPlanet Satellite (CHEOPS) is a space telescope specifically designed to mon…
Dead or Alive? How Bursty Star Formation and Patchy Dust Can Cause Temporary Quiescence in High-redshift Galaxies
Morishita, Takahiro; Faisst, Andreas L.
The recent discovery of a galaxy at z = 7.3 with undetected optical emission lines and a blue UV-to-optical continuum ratio in JWST spectroscopy is surprising and needs to be explained physically. Here, we explore two possibilities that could cause such a seemingly quiescent ∼5 × 108 M ⊙ galaxy in the early Universe: (i) stoc…
JWST observations of the Ring Nebula (NGC 6720): I. Imaging of the rings, globules, and arcs
Matsuura, Mikako; Volk, Kevin; Cami, Jan +18 more
We present JWST images of the well-known planetary nebula NGC 6720 (the Ring Nebula), covering wavelengths from 1.6 to 25 $\, \mu$m. The bright shell is strongly fragmented with some 20 000 dense globules, bright in H2, with a characteristic diameter of 0.2 arcsec and density nH ~ 105-106 cm-3…
JWST Thermal Emission of the Terrestrial Exoplanet GJ 1132b
Eastman, Jason D.; Bean, Jacob L.; Zhang, Michael +9 more
We present thermal emission measurements of GJ 1132b spanning 5–12 µm obtained with the Mid-Infrared Instrument Low-Resolution Spectrometer on the James Webb Space Telescope. GJ 1132b is an M dwarf rocky planet with T eq = 584 K and an orbital period of 1.6 days. We measure a white-light secondary eclipse depth of 140 ± 17 ppm, wh…
Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints
De la Torre Luque, Pedro; Balaji, Shyam; Koechler, Jordan
We study sub-GeV dark matter (DM) particles that may annihilate or decay into Standard Model particles producing an exotic injection component in the Milky Way that leaves an imprint in both photon and cosmic-ray (CR) fluxes. Specifically, the DM particles may annihilate or decay into e + e ‑, µ + µ
Data reconstruction of the dynamical connection function in f(Q) cosmology
Ren, Xin; Wang, Bo; Cai, Yi-Fu +2 more
We employ Hubble data and Gaussian Processes in order to reconstruct the dynamical connection function in $f(Q)$ cosmology beyond the coincident gauge. In particular, there exist three branches of connections that satisfy the torsionless and curvatureless conditions, parametrized by a new dynamical function $\gamma$. We express the redshift depend…