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Chemical enrichment of ICM within the Centaurus cluster - I. Radial profiles
Fabian, A. C.; Pinto, C.; Eckert, D. +6 more
We examine deep XMM-Newton European Photon Imaging Camera pn observations of the Centaurus cluster to study the hot intracluster medium (ICM) and radial metal distributions within such an environment. We found that the best-fitting spectral model corresponds to a lognormal temperature distribution, with discontinuities around ~10, ~50, and ~100 kp…
A naive Bayes classifier for identifying Class II YSOs
Wilson, Tom J.; Naylor, Tim; Wilson, Andrew J. +1 more
A naive Bayes classifier for identifying Class II YSOs has been constructed and applied to a region of the Northern Galactic Plane containing 8 million sources with good quality Gaia EDR3 parallaxes. The classifier uses the five features: Gaia G-band variability, WISE mid-infrared excess, UKIDSS and 2MASS near-infrared excess, IGAPS Hα excess, and…
A search for transients in the Reionization Lensing Cluster Survey (RELICS): three new supernovae
Mahler, Guillaume; Frye, Brenda L.; Kelly, Patrick L. +16 more
The Reionization Cluster Survey imaged 41 galaxy clusters with the Hubble Space Telescope (HST), in order to detect lensed and high-redshift galaxies. Each cluster was imaged to about 26.5 AB mag in three optical and four near-infrared bands, taken in two distinct visits separated by varying time intervals. We make use of the multiple near-infrare…
A transient ultraviolet outflow in the short-period X-ray binary UW CrB
Maccarone, T. J.; Degenaar, N.; Knigge, C. +4 more
Accreting low-mass X-ray binaries (LMXBs) are capable of launching powerful outflows such as accretion disc winds. In disc winds, vast amounts of material can be carried away, potentially greatly impacting the binary and its environment. Previous studies have uncovered signatures of disc winds in the X-ray, optical, near-infrared, and recently eve…
Hotter than Expected: Hubble Space Telescope (HST)/WFC3 Phase-resolved Spectroscopy of a Rare Irradiated Brown Dwarf with Strong Internal Heat Flux
Mayorga, L. C.; Lothringer, Joshua D.; Apai, Dániel +8 more
With infrared flux contrasts larger than typically seen in hot Jupiter, tidally locked white dwarf-brown dwarf binaries offer a superior opportunity to investigate atmospheric processes in irradiated atmospheres. NLTT5306 is such a system, with a M BD = 52 ± 3 M Jup brown dwarf, orbiting a T eff = 7756 ± 35 K white…
Energy transfer of the solar wind turbulence based on Parker solar probe and other spacecraft observations
He, Jiansen; Wang, Xin; Tu, Chuanyi +2 more
The supersonic solar wind, first predicted by Parker and then observed by Mariners, extends to form a heliosphere around the Sun. The energy supply from the energy containing range, the energy cascade though the inertial range, and the eventual energy dissipation are three basic processes of the energy transfer in the solar wind and have been stud…
The Galactic Interstellar Object Population: A Framework for Prediction and Inference
Bannister, Michele T.; Mackereth, J. Ted; Forbes, John C. +2 more
The Milky Way is thought to host a huge population of interstellar objects (ISOs), numbering approximately 1015 pc-3 around the Sun, which are formed and shaped by a diverse set of processes ranging from planet formation to Galactic dynamics. We define a novel framework, first to predict the properties of this Galactic ISO po…
Early-time Ultraviolet and Optical Hubble Space Telescope Spectroscopy of the Type II Supernova 2022wsp
Filippenko, Alexei V.; Modjaz, Maryam; Matheson, Thomas +10 more
We report early-time ultraviolet (UV) and optical spectroscopy of the young, nearby Type II supernova (SN) 2022wsp obtained by the Hubble Space Telescope (HST)/STIS at about 10 and 20 days after the explosion. The SN 2022wsp UV spectra are compared to those of other well-observed Type II/IIP SNe, including the recently studied Type IIP SN 2021yja.…
Application of a neural network classifier for the generation of clean Small Magellanic Cloud stellar samples
Luri, X.; Masana, E.; Jiménez-Arranz, Ó. +1 more
Context. Previous attempts to separate Small Magellanic Cloud (SMC) stars from the Milky Way (MW) foreground stars are based only on the proper motions of the stars.
Aims: In this paper, we aim to develop a statistical classification technique to effectively separate the SMC stars from the MW stars using a wider set of Gaia data. We aim to re…
1D non-LTE corrections for chemical abundance analyses of very metal-poor stars
Jablonka, P.; Hill, V.; Sitnova, T. +3 more
Detailed chemical abundances of very metal-poor (VMP; [Fe/H] < -2) stars are important for better understanding the first stars, early star formation, and chemical enrichment of galaxies. Big on-going and coming high-resolution spectroscopic surveys provide a wealth of material that needs to be carefully analysed. For VMP stars, their elemental…