Search Publications
Solar Orbiter's first Venus flyby. MAG observations of structures and waves associated with the induced Venusian magnetosphere
Maksimovic, M.; Bale, S. D.; Horbury, T. S. +18 more
Context. The induced magnetosphere of Venus is caused by the interaction of the solar wind and embedded interplanetary magnetic field with the exosphere and ionosphere of Venus. Solar Orbiter entered Venus's magnetotail far downstream, > 70 Venus radii, of the planet and exited the magnetosphere over the north pole. This offered a unique view o…
Quiet-time low energy ion spectra observed on Solar Orbiter during solar minimum
Kulkarni, S. R.; Rodríguez-Pacheco, J.; Wimmer-Schweingruber, R. F. +32 more
Context. The Solar Orbiter spacecraft cruised in the inner heliosphere during Feb. 2020 - Jan. 2021, moving between ∼0.5-1.0 au radial distance. The Energetic Particle Detector suite operated continuously during this period.
Aims: The Suprathermal Ion Spectrograph and High Energy Telescope observations made during intervals in between transie…
A discontinuity in the luminosity-mass relation and fluctuations in the evolutionary tracks of low-mass and low-metallicity stars at the Gaia M-dwarf gap
Kroupa, Pavel; Mansfield, Santana
Context. The Gaia M-dwarf gap is a recently discovered feature in the colour-magnitude diagram that shows a deficiency of low-mass and low-metallicity stars at the lower end of the main sequence.
Aims: We aim at performing theoretical stellar modelling at low metallicities using a fine mass step and a fine time step, looking specifically for …
DEATHSTAR: nearby AGB stars with the Atacama Compact Array. II. CO envelope sizes and asymmetries: the S-type stars
Lindqvist, M.; Olofsson, H.; Sahai, R. +13 more
Aims: We aim to constrain the sizes of, and investigate deviations from spherical symmetry in, the CO circumstellar envelopes (CSEs) of 16 S-type stars, along with an additional 7 and 4 CSEs of C-type and M-type AGB stars, respectively.
Methods: We map the emission from the CO J = 2-1 and 3-2 lines observed with the Atacama Compact Array…
Detection of new O-type stars in the obscured stellar cluster Tr 16-SE in the Carina Nebula with KMOS
Preibisch, T.; Roccatagliata, V.; Ercolano, B. +2 more
Context. The Carina Nebula harbors a large population of high-mass stars, including at least 75 O-type and Wolf-Rayet (WR) stars, but the current census is not complete since further high-mass stars may be hidden in or behind the dense dark clouds that pervade the association.
Aims: With the aim of identifying optically obscured O- and early …
Rieger-type periodicity in the total irradiance of the Sun as a star during solar cycles 23-24
Reiners, A.; Lanza, A. F.; Oliver, R. +4 more
Context. Total solar irradiance allows for the use of the Sun as a star for studying observations of stellar light curves from recent space missions.
Aims: We aim to study how the mid-range periodicity observed in solar activity indices influences the total solar irradiance.
Methods: We studied periodic variations of total solar irradian…
Broadband X-ray spectra and timing of the accreting millisecond pulsar Swift J1756.9-2508 during its 2018 and 2019 outbursts
Huang, Y.; Tsygankov, S. S.; Bozzo, E. +8 more
The accreting millisecond X-ray pulsar Swift J1756.9-2508 launched into an outburst in April 2018 and June 2019 - 8.7 years after the previous period of activity. We investigated the temporal, timing, and spectral properties of these two outbursts using data from NICER, XMM-Newton, NuSTAR, INTEGRAL, Swift, and Insight-HXMT. The two outbursts exhib…
Miec: A Bayesian hierarchical model for the analysis of nearby young open clusters
Miret-Roig, N.; Bouy, H.; Sarro, L. M. +4 more
Context. The analysis of luminosity and mass distributions of young stellar clusters is essential to understanding the star-formation process. However, the gas and dust left over by this process extinct the light of the newborn stars and can severely bias both the census of cluster members and itsss luminosity distribution.
Aims: We aim to de…
TESS and HARPS reveal two sub-Neptunes around TOI 1062
Bouchy, F.; Fridlund, M.; Helled, R. +48 more
The Transiting Exoplanet Survey Satellite (TESS) mission was designed to perform an all-sky search of planets around bright and nearby stars. Here we report the discovery of two sub-Neptunes orbiting around TOI 1062 (TIC 299799658), a V = 10.25 G9V star observed in the TESS Sectors 1, 13, 27, and 28. We use precise radial velocity observations fro…
Astrophysical properties of newly discovered Magellanic Cloud star clusters
Piatti, Andrés E.
New star cluster candidates projected toward the Large and Small Magellanic Clouds (LMC, SMC) have been recently discovered from relatively deep imaging surveys. Here, we conduct a sound analysis of 24 star cluster candidates located in the outer regions of the LMC and SMC using point spread function photometry produced by the Survey of the Magell…