Search Publications
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…
PhotoD with LSST: Stellar Photometric Distances Out to the Edge of the Galaxy
Jurić, Mario; Ivezić, Željko; Jurkić, Tomislav +14 more
As demonstrated with the Sloan Digital Sky Survey (SDSS), Pan-STARRS, and most recently with Gaia data, broadband near-UV to near-IR stellar photometry can be used to estimate distance, metallicity, and interstellar dust extinction along the line of sight for stars in the Galaxy. Anticipating photometric catalogs with tens of billions of stars fro…
VLF Transmitter Signals Observed by the Cluster Spacecraft Over a Wide Range of Latitudes
Santolík, O.; Němec, F.; Albert, J. M.
Very low frequency transmitter signals can penetrate through the ionosphere and propagate in the inner magnetosphere, being observed by spacecraft instruments with sufficient frequency resolution and range. We use 23 years of measurements performed by the Waves of High frequency and Sounder for Probing of Electron density by Relaxation instrument …
Land of gas and dust - exploring bursting cavities on comet 67P
De Keyser, Johan; Berthelier, Jean-Jacques; Wurz, Peter +9 more
Gas and dust outbursts are recurring phenomena on comets, offering critical insights into their subsurface activities. On comet 67P/Churyumov-Gerasimenko, two distinct outburst types have been identified: CO
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…
New Stellar Parameters, Metallicities, and Elemental Abundance Ratios for 311 Metal-poor Stars
Roederer, Ian U.; Mittal, Sanil
We present equivalent widths, improved model atmosphere parameters, and revised abundances for 14 species of 11 elements derived from high-resolution optical spectroscopy of 311 metal-poor stars. All of these stars had their parameters previously published by Roederer et al. We use color–Teff relationships calibrated for Gaia and 2MASS …
The Magnetically Induced Radial Velocity Variation of Gliese 341 and an Upper Limit to the Mass of Its Transiting Earth-sized Planet
Lustig-Yaeger, Jacob; Fu, Guangwei; Peacock, Sarah +5 more
The Transiting Exoplanet Survey Satellite (TESS) mission identified a potential 0.88R⊕ planet with a period of 7.577 days, orbiting the nearby M1V star GJ 341 (TOI 741.01). This system has already been observed by the James Webb Space Telescope (JWST) to search for presence of an atmosphere on this planet. Here, we present an in-depth a…
Martian buildings: Feasible cement/concrete for onsite sustainable construction from the structural point of view
Soureshjani, Omid Karimzade; Massumi, Ali; Nouri, Gholamreza
Colonizing other planets, like Mars, marks a significant milestone in the pursuit of a multi-planetary existence. Millions of people would settle on Mars in self-sufficient bases. Colonizing Mars is a long-term mission that demands self-sufficient, secure habitats and comprehensive planning. Importing structures, such as inflatable structures, fro…
Prediction of Star Formation Rates Using an Artificial Neural Network
Woo, Jong-Hak; Ayubinia, Ashraf; Kim, Changseok +2 more
In this study we develop an artificial neural network to estimate the infrared (IR) luminosity and star formation rates (SFR) of galaxies. Our network is trained using "true" IR luminosity values derived from modeling the IR spectral energy distributions of FIR-detected galaxies. We explore five different sets of input features, each incorporating…
Mind the gaps: improved methods for the detection of periodicities in unevenly sampled data
Gúrpide, Andrés; Middleton, Matthew
The detection of periodic signals in irregularly sampled time series is a problem commonly encountered in astronomy. Traditional tools used for periodic searches, such as the periodogram, have poorly defined statistical properties under irregular sampling, which complicate inferring the underlying aperiodic variability used for hypothesis testing.…