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Cepheids with giant companions. II. Spectroscopic confirmation of nine new double-lined binary systems composed of two Cepheids
Bono, Giuseppe; Thompson, Ian B.; Gieren, Wolfgang +13 more
Context. Binary Cepheids with giant companions are crucial for studying the physical properties of Cepheid variables, in particular providing the best means to measure their masses. Systems composed of two Cepheids are even more important, but to date, only one such system has been identified, in the Large Magellanic Cloud (LMC).
Aims: Our cu…
The solar cycle 25 multi-spacecraft solar energetic particle event catalog of the SERPENTINE project
Hayes, L. A.; Vainio, R.; Mitchell, J. G. +26 more
Context. The solar energetic particle analysis platform for the inner heliosphere (SERPENTINE) project, funded through the H2020-SPACE-2020 call of the European Union's Horizon 2020 framework program, employs measurements of the new inner heliospheric spacecraft fleet to address several outstanding questions on the origin of solar energetic partic…
X-ray counterpart detection and γ-ray analysis of the supernova remnant G279.0+01.1 with eROSITA and Fermi-LAT
Sasaki, Manami; Santangelo, Andrea; Pühlhofer, Gerd +2 more
A thorough inspection of known Galactic supernova remnants (SNRs) along the Galactic plane with SRG/eROSITA yielded the detection of the X-ray counterpart of the SNR G279.0+01.1. The SNR is located just 1.5° above the Galactic plane. Its X-ray emission emerges as an incomplete, partial shell of ~3° angular extension. It is strongly correlated to t…
Confirmation of TiO absorption and tentative detection of MgH and CrH in the atmosphere of HAT-P-41b
Pallé, E.; Chen, G.; Murgas, F. +3 more
Understanding the role of optical absorbers is critical for linking the properties of the dayside and terminator atmospheres of hot Jupiters. This study aims to identify the signatures of optical absorbers in the atmosphere of the hot Jupiter HAT-P-41b. We conducted five transit observations of this planet to obtain its optical transmission spectr…
Observations of fan-spine topology by Solar Orbiter/EUI: Rotational motions and indications of Alfvén waves
Berghmans, D.; Parenti, S.; Valori, G. +3 more
Context. Torsional Alfvén waves do not produce any intensity variation and are therefore challenging to observe with imaging instruments. Previously, Alfvén wave observations were reported throughout all the layers of the solar atmosphere using spectral imaging.
Aims: We present a torsional Alfvén wave detected in an inverted Y-shaped structu…
Characterisation of the warm-Jupiter TOI-1130 system with CHEOPS and a photo-dynamical approach
Alonso, R.; Deleuil, M.; Erikson, A. +93 more
Context. Among the thousands of exoplanets discovered to date, approximately a few hundred gas giants on short-period orbits are classified as 'lonely' and only a few are in a multi-planet system with a smaller companion on a close orbit. The processes that formed multi-planet systems hosting gas giants on close orbits are poorly understood, and o…
Generic low-atmosphere signatures of swirled-anemone jets
Nóbrega-Siverio, Daniel; Aulanier, Guillaume; Schmieder, Brigitte +4 more
Context. Solar jets are collimated plasma flows moving along magnetic field lines and are accelerated at low altitude following magnetic reconnection. Several of them originate from anemone-shaped low-lying arcades, and the most impulsive ones tend to be relatively wider and display untwisting motions.
Aims: We aim to establish typical behavi…
SDSS1335+0728: The awakening of a ∼106 M⊙ black hole
Bayo, A.; Bauer, F. E.; Merloni, A. +22 more
Context. The early-type galaxy SDSS J133519.91+072807.4 (hereafter SDSS1335+0728), which had exhibited no prior optical variations during the preceding two decades, began showing significant nuclear variability in the Zwicky Transient Facility (ZTF) alert stream from December 2019 (as ZTF19acnskyy). This variability behaviour, coupled with the hos…
Short-period pulsating hot subdwarf stars observed by TESS. II. Northern ecliptic hemisphere
Reed, M. D.; Van Grootel, V.; Charpinet, S. +5 more
We present the results of an extension of our Transiting Exoplanet Survey Satellite (TESS) search for short-period pulsations in compact stellar objects observed during the second and fourth years of the TESS mission, which targeted the northern ecliptic hemisphere. For many of the targets, we exploited unpublished spectroscopic data to confirm or…
Galaxy populations and redshift dependence of the correlation between infrared and radio luminosity
Massardi, M.; Negrello, M.; De Zotti, G. +4 more
We argue that the difference in infrared-to-radio luminosity ratio between local and high-redshift star-forming galaxies reflects the alternative physical conditions –including magnetic field configurations– of the dominant population of star-forming galaxies in different redshift ranges. We define three galactic types, based on our reference mode…