Search Publications
Stellar atmospheric parameters and chemical abundances of ~5 million stars from S-PLUS multiband photometry
Mendes de Oliveira, C.; Placco, V. M.; Borges Fernandes, M. +30 more
Context. The APOGEE, GALAH, and LAMOST spectroscopic surveys have substantially contributed to our understanding of the Milky Way by providing a wide range of stellar parameters and chemical abundances. Complementing these efforts, photometric surveys that include narrowband and medium-band filters, such as Southern Photometric Local Universe Surv…
Near-ultraviolet absorption distribution of primitive asteroids from photometric surveys: II. Collisional families
Tatsumi, Eri; Vilas, Faith; de León, Julia +5 more
Context. Primitive asteroids consisting of mainly phyllosilicates and opaque minerals have great variation at near-ultraviolet (NUV) wavelengths (0.35–0.5 µm). The absorption in NUV could be indicative of phyllosilicates that reflect their formation environments such as the distribution of water, temperature, and pressure. The asteroid colli…
XMM/HST monitoring of the ultra-soft highly accreting narrow-line Seyfert 1 RBS 1332
Bianchi, S.; Cappi, M.; Petrucci, P. -O. +10 more
Ultra-soft narrow-line Seyfert 1s (US-NLSy 1s) are a poorly observed class of active galactic nuclei characterised by significant flux changes and an extreme soft X-ray excess. This peculiar spectral shape represents a golden opportunity to test whether the standard framework commonly adopted for modelling local AGNs is still valid. We thus presen…
4FGL J1544.2‑2554: A new spider pulsar candidate
Zharikov, S. V.; Karpova, A. V.; Shibanov, Yu. A. +3 more
Context. Spider pulsars are millisecond pulsars in tight binary systems in which a low-mass companion star is heated and ablated by the pulsar wind. Observations of these objects allow one to study stellar evolution with the formation of millisecond pulsars and the physics of superdense matter in neutron stars. However, spiders are rare due to dif…
Resonant interactions between suprathermal protons and ion-scale waves near an interplanetary shock
Wimmer-Schweingruber, Robert F.; Rodríguez-Pacheco, Javier; Berger, Lars +8 more
Context. The interaction between waves and particles is crucial for particle acceleration near interplanetary shocks. Previously, research on these processes was constrained by limited data and the coarse time resolution of interplanetary missions. However, recent high-resolution observations from the Solar Orbiter mission are providing new insigh…
GJ 2126 b: A highly eccentric Jovian exoplanet
Zucker, S.; Schorr, A.; Binnenfeld, A.
We report the discovery of GJ 2126 b, a highly eccentric (e = 0.85) Jupiter-like planet orbiting its host star every 272.7 days. The planet was detected and characterized using 112 radial velocity (RV) measurements from HARPS (High Accuracy Radial velocity Planet Searcher), provided by HARPS-RVBank. This planet orbits a low-mass star and ranks amo…
Intervening nuclear obscuration changing the X-ray look of the z ≈ 6 quasi-stellar object CFHQS J164121+375520
Brandt, W. N.; Vignali, C.; Gilli, R. +16 more
X-ray observations of the optically selected z = 6.025 quasi-stellar object (QSO) CFHQS J164121+375520 (hereafter J1641) revealed that its flux dropped by a factor of ≳7 between 2018, when it was a bright and soft X-ray source, and 2021. Such a strong variability amplitude has not been observed before among z > 6 QSOs, and the underlying physic…
Assessing the detection of the Yarkovsky effect using the Gaia DR3 and FPR catalogues
Oszkiewicz, Dagmara; Bartczak, Przemysław; Dziadura, Karolina
Aims. The primary objective of this study was to use the newest Gaia Focused Product Release (FPR) catalogue, which contains ultra-precise asteroid astrometry spanning 66 months, to detect the Yarkovsky effect. This non-gravitational acceleration affects the orbits of small asteroids. Moreover, we examined close approaches of near-Earth asteroids …
Constraints to the drag-based reverse modeling
Temmer, M.; Vršnak, B.; Dumbović, M. +2 more
Context. One of the most widely used space weather forecast models to simulate the propagation of coronal mass ejections (CMEs) is the analytical drag-based model (DBM). It predicts the CME arrival time and speed at Earth or at a specific target (planets, spacecraft) in the Solar System. The corresponding drag-based ensemble model (DBEM) additiona…
Atmospheric dynamics of the hypergiant RW Cep during the Great Dimming
Yang, S.; Kolka, I.; Kasikov, A. +5 more
Context. The hypergiant RW Cep is one of the largest stars in the Galaxy. The evolution and mass loss of such stars have profound effects on their surrounding regions and their galaxy as a whole. Between 2020 and 2024, RW Cep experienced a historic mass-loss event known as the Great Dimming. Aims. This study provides a spectroscopic analysis of RW…