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Properties of Galactic B[e] Supergiants. V. 3 Pup-Constraining the Orbital Parameters and Modeling the Circumstellar Environments
Miroshnichenko, A. S.; Manset, N.; Zharikov, S. V. +9 more
We report the results of long-term spectroscopic monitoring of the A-type supergiant with the B[e] phenomenon 3 Pup = HD 62623. We confirm earlier findings that it is a binary system. The orbital parameters were derived using cross-correlation of the spectra in a range of 4460-4632 Å, which contains over 30 absorption lines. The orbit was found to…
Ionosphere Feedback to Electron Scattering by Equatorial Whistler Mode Waves
Artemyev, A. V.; Runov, A.; Shen, Y. +5 more
Plasma sheet electron precipitation, much of it driven by whistler mode waves, is critical for magnetosphere-ionosphere coupling. This precipitation leads to a secondary electron population at low altitudes, which moves upward along magnetic field lines to the equatorial plasma sheet. We investigate observational evidence for such electron precipi…
Polarisation and source structure of solar stationary type IV radio bursts
Klein, Karl-Ludwig; Salas-Matamoros, Carolina
The reconfiguration of the magnetic field during and after a coronal mass ejection (CME) may be accompanied by radio emission from non-thermal electrons. In particular, stationary type IV bursts (also called storm continua) are emitted by electrons in closed magnetic configurations usually located in the wake of the outward-travelling CME. Althoug…
A Survey of Small-Scale Waves and Wave-Like Phenomena in Jupiter's Atmosphere Detected by JunoCam
Wong, Michael H.; Fletcher, Leigh N.; Ingersoll, Andrew P. +17 more
In the first 20 orbits of the Juno spacecraft around Jupiter, we have identified a variety of wave-like features in images made by its public-outreach camera, JunoCam. Because of Juno's unprecedented and repeated proximity to Jupiter's cloud tops during its close approaches, JunoCam has detected more wave structures than any previous surveys. Most…
The Ultraluminous X-Ray Sources Population of the Galaxy NGC 7456
Salvaterra, R.; Haberl, F.; Tiengo, A. +28 more
Ultraluminous X-ray sources (ULXs) are a class of accreting compact objects with X-ray luminosities above 1039 erg s-1. The ULX population counts several hundred objects but only a fraction are well studied. Here we present a detailed analysis of all ULXs hosted in the galaxy NGC 7456. It was observed in X-rays only once in t…
A radiative transfer model for the spiral galaxy M33★
Tuffs, Richard J.; Popescu, Cristina C.; Grootes, Meiert +5 more
We present the first radiative transfer (RT) model of a non-edge-on disc galaxy in which the large-scale geometry of stars and dust is self-consistently derived through the fitting of multiwavelength imaging observations from the ultraviolet to the submm. To this end, we used the axisymmetric RT model of Popescu et al. and a new methodology for de…
How do atomic code uncertainties affect abundance measurements in the intracluster medium?
Gu, Liyi; Mao, Junjie; Kaastra, Jelle S. +6 more
Accurate chemical abundance measurements of X‑ray‑emitting atmospheres pervading massive galaxies, galaxy groups, and clusters provide essential information on the star formation and chemical enrichment histories of these large‑scale structures. Although the collisionally ionized nature of the intracluster medium (ICM) makes these abundance measur…
A More Efficient Search for H2O Megamaser Galaxies: The Power of X-Ray and Mid-infrared Photometry
Chang, Y. -Y.; Cunha, E. da; Matsushita, S. +10 more
We present an investigation of the dependence of H2O maser detection rates and properties on the mid-IR active galactic nucleus (AGN) luminosity, LAGN, and the obscuring column density, NH, based on mid-IR and hard X-ray photometry. Based on spectral energy distribution fitting that allows for decomposition of the …
Geometry of the X-ray source 1H 0707-495
Done, Chris; Mizumoto, Misaki; Szanecki, Michał +3 more
Aims: We investigate the constraints on the size and location of the X-ray source in 1H 0707-495 determined from the shape of the relativistically smeared reflection from the accretion disc.
Methods: We developed a new code to model an extended X-ray source and we applied this code to all archival XMM observations of 1H 0707-495.
Re…
Quasar Sightline and Galaxy Evolution (QSAGE) survey - II. Galaxy overdensities around UV luminous quasars at z = 1-2
Cullen, F.; Bower, R. G.; Tejos, N. +8 more
We demonstrate that the UV brightest quasars at z = 1-2 live in overdense environments. This is based on an analysis of deep Hubble Space Telescope WFC3 G141 grism spectroscopy of the galaxies along the lines-of-sight to UV luminous quasars in the redshift range z = 1-2. This constitutes some of the deepest grism spectroscopy performed by WFC3, wi…