Search Publications
An old warm Jupiter orbiting the metal-poor G-dwarf TOI-5542
Jordán, Andrés; Stassun, Keivan G.; Worters, Hannah L. +30 more
We report the discovery of a 1.32−0.10+0.10 MJup planet orbiting on a 75.12 day period around the G3V 10.8−3.6+2.1 Gyr old star TOI-5542 (TIC 466206508; TYC 9086-1210-1). The planet was first detected by the Transiting Exoplanet Survey Satellite (TESS) as a single transit event in TESS Sector …
No swan song for Sun-as-a-star helioseismology: Performances of the Solar-SONG prototype for individual mode characterisation
Christensen-Dalsgaard, J.; García, R. A.; Grundahl, F. +5 more
The GOLF instrument on board SoHO has been in operation for almost 25 years, but the ageing of the instrument has now strongly affected its performance, especially in the low-frequency pressure-mode (p-mode) region. At the end of the SoHO mission, the ground-based network BiSON will remain the only facility able to perform Sun-integrated helioseis…
Power distribution of oscillations in the atmosphere of a plage region. Joint observations with ALMA, IRIS, and SDO
Wedemeyer, Sven; Fleck, Bernhard; Jafarzadeh, Shahin +3 more
Context. Joint observations of the Atacama Large Millimeter/Submillimeter Array (ALMA) with other solar observatories can provide a wealth of opportunities for understanding the coupling between different layers of the solar atmosphere.
Aims: We present a statistical analysis of the power distribution of oscillations in a plage region in acti…
ESASky SSOSS: Solar System Object Search Service and the case of Psyche
Valtchanov, I.; López-Caniego, M.; Küppers, M. +18 more
Context. The store of data collected in public astronomical archives across the world is continuously expanding and, thus, providing a convenient interface for accessing this information is a major concern for ensuring a second life for the data. In this context, Solar System objects (SSOs) are often difficult or even impossible to query, owing to…
Dents in the Veil: protostellar feedback in Orion
Bally, J.; Goicoechea, J. R.; van der Tak, F. F. S. +3 more
Context. Interest in stellar feedback has recently increased because new studies suggest that radiative and mechanical feedback from young massive stars significantly regulates the physical and chemical composition of the interstellar medium. Recent SOFIA [C II] 158 µm observations of the Orion Veil have revealed that the expanding bubble is…
Common patterns in pulse profiles of high-mass X-ray binaries
Kretschmar, P.; Caballero, I.; Fürst, F. +2 more
Context. X-ray pulsars are binary systems which consist of a neutron star in orbit with a mass donor (companion). In these systems the neutron accretes matter from the companion star, which creates accretion columns or hot spots on the neutron star surface and gives rise to pulsations in the X-ray light curve. The pulse profiles carry information …
Moving structures in ultraviolet bright points: Observations from Solar Orbiter/EUI
Li, Dong
Context. Moving structures have been detected in coronal bright points and in a solar flare in active regions that are bidirectional, symmetrical, simultaneous, and quasi-periodic. These could be regarded as observational evidence of plasma outflows via magnetic reconnection.
Aims: We explored pairs of moving structures in fifteen ultraviolet…
Constraining masses and separations of unseen companions to five accelerating nearby stars
Rouan, D.; Schmidt, T. O. B.; Henning, T. +40 more
Aims: In this work, we aim to constrain the masses and separations of potential substellar companions to five accelerating stars (HIP 1481, HIP 88399, HIP 96334, HIP 30314, and HIP 116063) using multiple data sets acquired with different techniques.
Methods: Our targets were originally observed as part of the SPHERE/SHINE survey, and rad…
CHEMOUT: CHEMical complexity in star-forming regions of the OUTer Galaxy. II. Methanol formation at low metallicity
Elia, D.; Magrini, L.; Caselli, P. +8 more
Context. The outer Galaxy is an environment with a lower metallicity than the regions surrounding the Sun and for this reason the formation and survival of molecules in star-forming regions located in the inner and outer Galaxy are expected to be different.
Aims: To gain understanding of how chemistry changes throughout the Milky Way, it is c…
Revisiting Ulysses electron data with a triple fit of velocity distributions
Fichtner, H.; Scherer, K.; Lazar, M. +1 more
Context. Given their uniqueness, the Ulysses data can still provide us with valuable new clues about the properties of plasma populations in the solar wind, and especially about their variations with heliographic coordinates. In the context of kinetic waves and instabilities in the solar wind plasma, the electron temperature anisotropy plays a cru…