Search Publications
Detection of an unidentified soft X-ray emission feature in NGC 5548
Gu, Liyi; Ward, Martin; Mehdipour, Missagh +17 more
Context. NGC 5548 is an X-ray bright Seyfert 1 active galaxy. It exhibits a variety of spectroscopic features in the soft X-ray band, in particular including the absorption by the active galactic nucleus (AGN) outflows of a broad range of ionization states, with column densities up to 1027 m−2, and having speeds up to several…
Discrete Element Modeling of Aeolian-like Morphologies on Comet 67P/Churyumov-Gerasimenko
Otto, K. A.; Sachse, M.; Kappel, D. +1 more
Context. Even after the Rosetta mission, some of the mechanical parameters of comet 67P/Churyumov-Gerasimenko's surface material are still not well constrained. They are needed to improve our understanding of cometary activity or for planning sample return procedures.
Aims: We discuss the physical process dominating the formation of aeolian-l…
Solid confirmation of the broad DIB around 864.8 nm using stacked Gaia-RVS spectra
Schultheis, M.; Marshall, D. J.; Smith, M. +26 more
Context. Studies of the correlation between different diffuse interstellar bands (DIBs) are important for exploring their origins. However, the Gaia-RVS spectral window between 846 and 870 nm contains few DIBs, the strong DIB at 862 nm being the only convincingly confirmed one.
Aims: Here we attempt to confirm the existence of a broad DIB aro…
The complex dynamical past and future of double eclipsing binary CzeV343: Misaligned orbits and period resonance
Prieto, Jose L.; Fausnaugh, Michael M.; De Rosa, Gisella +5 more
CzeV343 (=V849 Aur) was previously identified as a candidate double eclipsing binary (2+2 quadruple), where the orbital periods of the two eclipsing binaries (PA ≈ 1.2 days and PB ≈ 0.8 days) lie very close to a 3:2 resonance. Here, we analyze 11 yr of ground-based photometry, four sectors of Transiting Exoplanet Survey Satel…
The strongest cool core in REXCESS: Missing X-ray cavities in RXC J2014.8-2430
Donahue, Megan; Mroczkowski, Tony; Clarke, Tracy E. +8 more
We present a broad, multi-wavelength study of RXC J2014.8−2430, the most extreme cool-core cluster in the Representative XMM-Newton Cluster Structure Survey (REXCESS), using Chandra X-ray, Southern Astrophysical Research (SOAR) Telescope spectroscopic and narrow-band imaging, Atacama Large Millimeter/submillimeter Array (ALMA), Very Large Array, a…
First investigation of the diamagnetic cavity boundary layer with a 1D3V PIC simulation
Gunell, H.; Nilsson, H.; Hamrin, M. +3 more
Context. Amongst the different features and boundaries encountered around comets, one remains of particular interest to the plasma community: the diamagnetic cavity. Crossed for the first time at 1P/Halley during the Giotto flyby in 1986 and later met more than 700 times by the ESA Rosetta spacecraft around Comet 67P/Churyumov-Gerasimenko, this re…
Expanding shells around young clusters - S 171/Be 59
Persson, C. M.; Gahm, G. F.; Wilhelm, M. J. C. +2 more
Context. Some HII regions that surround young stellar clusters are bordered by molecular shells that appear to expand at a rate inconsistent with our current model simulations. In this study we focus on the dynamics of Sharpless 171 (including NGC 7822), which surrounds the cluster Berkeley 59.
Aims: We aim to compare the velocity pattern ove…
XMM-Newton study of six massive, X-ray luminous galaxy cluster systems in the redshift range z = 0.25-0.5
Böhringer, H.; Laporte, N.; Ellis, R. S. +2 more
Massive galaxy clusters are interesting astrophysical and cosmological objects to study, but they are relatively rare. In the redshift range z = 0.25-0.5 which is, for example, a favourable region for gravitational lensing studies, about 100 such systems are known. Most of them have been studied in X-rays. In this paper we study the six remaining …
Deep and fast Solar System flybys: the controversial case of WD 0810-353
de la Fuente Marcos, R.; de la Fuente Marcos, C.
Context. Most flybys in the Galactic disk are distant, beyond 104 AU, and have characteristic velocities of ~70 km s−1. However, deep and fast encounters also take place, albeit with lower probability, particularly if one of the objects involved is a stellar remnant ejected during a supernova. WD 0810-353 might be a high velo…
The miniJPAS survey: White dwarf science with 56 optical filters
Tremblay, P. -E.; Mendes de Oliveira, C.; Guerrero, M. A. +21 more
Aims: We analyze the white dwarf population in miniJPAS, the first square degree observed with 56 medium-band, 145 Å in width optical filters by the Javalambre Physics of the accelerating Universe Astrophysical Survey (J-PAS), to provide a data-based forecast for the white dwarf science with low-resolution (R ∼ 50) photo-spectra.
Methods…