Search Publications
Multiband embeddings of light curves
Catelan, M.; Protopapas, P.; Becker, I. +1 more
In this work, we propose a novel ensemble of recurrent neural networks (RNNs) that considers the multiband and non-uniform cadence without having to compute complex features. Our proposed model consists of an ensemble of RNNs, which do not require the entire light curve to perform inference, making the inference process simpler. The ensemble is ab…
Y Gem, a symbiotic star outshone by its asymptotic giant branch primary component
Guerrero, M. A.; Toalá, J. A.; Rodríguez-González, J. B. +2 more
Context. A considerable number of asymptotic giant branch (AGB) stars exhibit UV excess and/or X-ray emission that indicates a binary companion. AGB stars are so bright that they easily outshine their companions. This almost prevents their identification. Y Gem has been known for some decades to be an AGB star that is bright in the far-UV and X-ra…
Estimating uncertainties in the back-mapping of the fast solar wind
Dolla, L.; Keppens, R.; Koukras, A.
Context. Although the most likely source regions of fast solar wind relate to coronal holes, the exact acceleration mechanism that drives the fast solar wind is still not fully understood. An important approach that can improve our understanding involves the combination of remote sensing and in situ measurements, often referred to as linkage analy…
A population synthesis study of the Gaia 100 pc unresolved white dwarf-main-sequence binary population
Rebassa-Mansergas, A.; Torres, S.; Brown, A. J. +1 more
Context. Binaries consisting of a white dwarf and a main-sequence star (WDMSs) are excellent tools for studying a wide variety of open problems in modern astronomy. However, due to selection effects, the currently known WDMS population is severely affected by observational biases. This is particularly the case for unresolved systems in which the m…
Flaring together: A preferred angular separation between sympathetic flares on the Sun
Strugarek, A.; Charbonneau, P.; Guité, L. -S.
Context. Sympathetic solar flares are eruptions that occur nearby in space and time, driven by an apparent interaction between the active regions in which they are triggered. Their statistical existence on the Sun has yet to be firmly established. Aims. The main goal of this paper is to identify a statistical signature of sympathetic flares, chara…
X-ray and optical analysis of the distant merging double cluster SPT-CLJ2228-5828, its gas bridge, and its shock front
Sharon, K.; Schrabback, T.; Zenteno, A. +16 more
Galaxy cluster mergers are excellent laboratories for studying a wide variety of different physical phenomena. An example of such a cluster system is the distant SPT-CLJ2228-5828 merger located at z ≈ 0.77. Previous analyses via the thermal Sunyaev-Zeldovich effect and weak lensing (WL) data suggested that the system was potentially a dissociative…
On Alfvénic turbulence of solar wind streams observed by Solar Orbiter during March 2022 perihelion and their source regions
Livi, S.; van Driel-Gesztelyi, L.; Matteini, L. +31 more
Context. It has been recently accepted that the standard classification of the solar wind solely according to flow speed is outdated, and particular interest has been devoted to the study of the origin and evolution of so-called Alfvénic slow solar wind streams and to what extent such streams resemble or differ from fast wind. Aims. In March 2022,…
Multi-spacecraft observations of the decay phase of solar energetic particle events
Laitinen, T.; Wimmer-Schweingruber, R. F.; Dalla, S. +3 more
Context. The parameters of solar energetic particle (SEP) event profiles such as the onset time and peak time have been researched extensively to obtain information on the acceleration and transport of SEPs. The corotation of particle-filled magnetic flux tubes with the Sun is generally thought to play a minor role in determining intensity profile…
Stellar flare morphology with TESS across the main sequence
Kriskovics, L.; Pál, A.; Görgei, A. +5 more
Context. Stellar flares are abundant in space photometric light curves. As they are now available in large enough numbers, the statistical study of their overall temporal morphology is timely. Aims. We use light curves from the Transiting Exoplanet Survey Satellite (TESS) to study the shapes of stellar flares beyond a simple parameterization by du…
Three warm Jupiters orbiting TOI-6628, TOI-3837, and TOI-5027 and one sub-Saturn orbiting TOI-2328
Trifonov, Trifon; Henning, Thomas; Bieryla, Allyson +35 more
We report the discovery and characterization of three new transiting giant planets orbiting TOI-6628, TOI-3837, and TOI-5027 and one new warm sub-Saturn orbiting TOI-2328, whose transits events were detected in the light curves of the Transiting Exoplanet Survey Satellite (TESS) space mission. By combining TESS light curves with ground-based photo…