Search Publications
Exploring extreme brightness variations in blue supergiant MACHO 80.7443.1718: Evidence for companion-driven enhanced mass loss
Pigulski, A.; Kołaczek-Szymański, P. A.; Moździerski, D. +2 more
Context. The evolution of massive stars is dominated by interactions within binary and multiple systems. In order to accurately model this evolution, it is necessary to investigate all possible forms of an interaction in binary systems that may affect the evolution of the components. One of the "laboratories" plausible for this kind of investigati…
Physical properties of Centaur (60558) 174P/Echeclus from stellar occultations
Maury, A.; Gillon, M.; Jehin, E. +42 more
The Centaur (60558) Echeclus was discovered on 2000 March 03, orbiting between the orbits of Jupiter and Uranus. After exhibiting frequent outbursts, it also received a comet designation, 174P. If the ejected material can be a source of debris to form additional structures, studying the surroundings of an active body like Echeclus can provide clue…
Delayed and Fast-rising Radio Flares from an Optical and X-Ray-detected Tidal Disruption Event in the Center of a Dwarf Galaxy
Yang, Lei; Shu, Xinwen; Wang, Yibo +7 more
AT 2018cqh is a unique tidal disruption event (TDE) discovered in a dwarf galaxy. Both the light-curve fitting and galaxy scaling relationships suggest a central black hole mass in the range of 5.9 < logM BH/M ☉ < 6.4. The r-band peak luminosity is ∼ 1043 erg s‑1, making AT 2018cqh relatively faint…
AGNFITTER-RX: Modeling the radio-to-X-ray spectral energy distributions of AGNs
Bauer, F. E.; Buchner, J.; Stalevski, M. +9 more
We present new advancements in the modeling of the spectral energy distributions (SEDs) of active galaxies by introducing the radio-to-X-ray fitting capabilities of the publicly available Bayesian code AGNFITTER. The new code release, called AGNFITTER-RX, models the broad-band photometry covering the radio, infrared (IR), optical, ultraviolet (UV)…
Signs of magnetic star-planet interactions in HD 118203. TESS detects stellar variability that matches the orbital period of a close-in eccentric Jupiter-sized companion
Barrado, D.; Santos, N. C.; Lillo-Box, J. +4 more
Context. Planetary systems with close-in giant planets can experience magnetic star-planet interactions that modify the activity levels of their host stars. The induced activity is known to strongly depend on the magnetic moment of the interacting planet. Therefore, such planet-induced activity should be more readily observable in systems with clo…
SPICE connection mosaics to link the Sun's surface and the heliosphere
Williams, D.; Barczynski, K.; Peter, H. +28 more
Aims: We present an analysis of the first connection mosaic made by the SPICE instrument on board the ESA/NASA Solar Orbiter mission on March 2, 2022. The data will be used to map coronal composition that will be compared with in-situ measurements taken by SWA/HIS to establish the coronal origin of the solar wind plasma observed at Solar Orbi…
Galaxy morphology classification based on Convolutional vision Transformer (CvT)
Xu, Tingting; Deng, Linhua; Cao, Jie +4 more
Context. The classification of galaxy morphology is among the most active fields in astronomical research today. With the development of artificial intelligence technology, deep learning is a useful tool in the classification of the morphology of galaxies and significant progress has been made in this domain. However, there is still some room for …
Probing coherence in metal absorption towards multiple images of strong gravitationally lensed quasars
Fumagalli, Michele; Acebron, Ana; Grillo, Claudio +3 more
We present a tomographic analysis of metal absorption lines arising from the circumgalactic medium (CGM) of galaxies at z ≈ 0.5-2, using Multi Unit Spectroscopic Explorer (MUSE) observations of two background quasars at z ≈ 2.2 and 2.8, which are two of the few currently known quasars with multiple images due to strong gravitational lensing by gal…
Imaging of I Zw 18 by JWST. I. Detecting Dusty Stellar Populations
Hirschauer, Alec S.; Boyer, Martha L.; Östlin, Göran +17 more
We present a JWST imaging survey of I Zw 18, the archetypal extremely metal-poor, star-forming (SF), blue compact dwarf galaxy. With an oxygen abundance of only ∼3% Z ⊙, it is among the lowest-metallicity systems known in the local Universe, and is, therefore, an excellent accessible analog for the galactic building blocks which existed…
Magnetic Fields and Plasma Heating in the Sun's Atmosphere
Kleint, L.; de Wijn, A. G.; Tritschler, A. +3 more
We use the first publicly available data from the Daniel K. Inouye Solar Telescope to track magnetic connections from the solar photosphere into the corona. We scrutinize relationships between chromospheric magnetism and bright chromospheric, transition region, and coronal plasmas. In 2022 June, the Visible Spectro-Polarimeter (ViSP) instrument ta…