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Infrared view of the multiphase ISM in NGC 253. II. Modelling the ionised and neutral atomic gas
Lebouteiller, Vianney; Ramambason, Lise; Madden, Suzanne C. +9 more
Context. Multi-wavelength studies of galaxies and galactic nuclei allow us to build a relatively more complete picture of the interstellar medium (ISM), especially in the dusty regions of starburst galaxies. An understanding of the physical processes in nearby galaxies can assist in the study of more distant sources at higher redshifts that cannot…
The Environment and Star Formation around the Infrared Bubble N 13
Xu, Ye; Zhou, Dong-Dong; Zhou, Jian-Jun +2 more
Infrared bubbles provide a unique opportunity to study the interactions between massive stars and surrounding material. We conduct a multi-wavelength study on the environment and star formation around an infrared bubble N 13. Three dust clumps and two molecular clumps are identified around N 13, which are all distributed on the layer. Young stella…
Concerning the detection of electromagnetic knot structures in space plasmas using the wave telescope technique
Motschmann, Uwe; Glassmeier, Karl-Heinz; Toepfer, Simon
The wave telescope technique is broadly established in the analysis of spacecraft data and serves as a bridge between local measurements and the global picture of spatial structures. The technique is originally based on plane waves and has been extended to spherical waves, phase-shifted waves and planetary magnetic field representation. The goal o…
Simultaneous Estimates of Star-cluster Age, Metallicity, Mass, and Extinction (SESAMME). I. Presenting an MCMC Approach to Spectral Stellar Population Fitting
Hernandez, Svea; Smith, Linda J.; Aloisi, Alessandra +3 more
We present the first version release of SESAMME, a public, Python-based full spectrum fitting tool for Simultaneous Estimates of Star-cluster Age, Metallicity, Mass, and Extinction. SESAMME compares an input spectrum of a star cluster to a grid of stellar population models with an added nebular continuum component, using Markov Chain Monte Carlo m…
Multipoint Detection of GRB221009A's Propagation through the Heliosphere
Wilson, Lynn; Balikhin, Michael; Larson, Davin +9 more
We present the results of processing the effects of the powerful gamma-ray burst GRB221009A captured by the charged particle detectors (electrostatic analyzers and solid-state detectors) on board spacecraft at different points in the heliosphere on 2022 October 9. To follow the GRB221009A propagation through the heliosphere, we used the electron a…
The m-dimensional spatial Nyquist limit using the wave telescope for larger numbers of spacecraft
Motschmann, Uwe; Plaschke, Ferdinand; Glassmeier, Karl-Heinz +2 more
Spacecraft constellations consisting of multiple satellites are becoming more and more interesting not only for commercial use but also for space science missions. The proposed and accepted scientific multi-satellite missions that will operate within Earth's magnetospheric environment, like HelioSwarm, require researchers to extend established met…
Super rogue waves at Venusian ionosphere and mantle
El-Shafeay, N. A.; El-Taibany, W. F.; Moslem, W. M. +1 more
Formation of super rogue ion-acoustic wave is suggested as a physical catalyst for the photochemical reaction to form the Venusian ionosphere and its mantle. Based on the observed data at Venus by Pioneer Venus Orbiter (PVO) and Venus Express (VEX), we constructed our models. The plasma model of the ionosphere consists of two positive ions fluid (…
The Sun as a revolving-field magnetic alternator with a wobbling-core rotator from real data
Omerbashich, Mensur
Rather than as a star classically assumed to feature elusive dynamo or a proverbial engine and impulsively alternating polarity, the Sun reveals itself in the 385.8–2.439-nHz (1-month–13-years) band of polar (φSun>|70°|) wind's decadal dynamics, dominated by the fast (>700 km s^‑1) winds, as a globally completely vibrating revolving-field ma…
Quasi‑periodic oscillations are more than timing features: Applying the accretion‑ejection instability in super massive black‑holes
Varniere, Peggy
Low frequency quasi‑periodic oscillations (LFQPOs) have always been seen uniquely as a timing feature, with most models focused on reproducing only their timing behavior. Previously, the accretion‑ejection instability (AEI) predicted the existence of a more subtle effect on their energy spectrum. In the case of low mass X‑ray binaries (LMXB), that…
A Six Year, Low-resolution, Multibroadband Transit Photometry Study of HD 189733b
Piccone, Ashley N.; Kobulnicky, Henry A.; Jang-Condell, Hannah +13 more
Transmission spectroscopy offers an invaluable opportunity to characterize the atmospheres of exoplanets. We present new ground-based optical transmission spectra of the hot Jupiter HD 189733b, derived from nine transits observed over a six year time span (2016-2021) using near-simultaneous $u^{\prime} g^{\prime} r^{\prime} i^{\prime} $ broadband …