Search Publications
Missions
Journals
Publication Years
Discovery of a persistent radio source associated with FRB 20240114A
Piro, L.; Palazzi, E.; Rossi, A. +6 more
Aims. We present the discovery of a fourth persistent radio source (PRS) associated with a fast radio burst (FRB). Methods. Following previous indications of a candidate PRS associated with FRB 20240114A, we performed deep Very Long Baseline Array observations at 5 GHz to test the presence of a compact radio source within the uncertainty position …
A possible misaligned orbit for the young planet AU Mic c
Aigrain, S.; Alonso, R.; Deleuil, M. +98 more
The AU Microscopii planetary system is only 24 Myr old, and its geometry may provide clues about the early dynamical history of planetary systems. Here, we present the first measurement of the Rossiter-McLaughlin effect for the warm sub-Neptune AU Mic c, using two transits observed simultaneously with the European Southern Observatory's (ESO's) Ve…
Testing the Universality of Self-organized Criticality in Galactic, Extragalactic, and Black Hole Systems
Göǧüş, Ersin; Aschwanden, Markus J.
In this study, we test whether the power law slopes (α F ) for fluxes (F), and (α E ) for energies (E) are universal in their size distributions,
A novel method for estimating the far-ultraviolet flux, and a catalogue for disc-hosting stars in nearby star-forming regions
Testi, Leonardo; Rosotti, Giovanni; Zari, Eleonora +4 more
When protoplanetary discs are externally irradiated by far-ultraviolet (FUV) photons from OBA-type stars, they lose material through photoevaporative winds. This reduces the amount of material that is available to form planets. Understanding the link between the environmental irradiation and the observed disc properties requires accurately evaluat…
Decent Estimate of CME Arrival Time From a Data-Assimilated Ensemble in the Alfvén Wave Solar Atmosphere Model (DECADE-AWSoM)
Chen, Yang; Manchester, Ward; Huang, Zhenguang +7 more
Forecasting the arrival time of Earth-directed coronal mass ejections (CMEs) via physics-based simulations is an essential but challenging task in space weather research due to the complexity of the underlying physics and limited remote and in situ observations of these events. Data assimilation techniques can assist in constraining free model par…
Magnetic Activity Evolution of Solar-like Stars. II. Sph–Ro Evolution of Kepler Main-sequence Targets
van Saders, Jennifer; García, Rafael A.; Breton, Sylvain N. +16 more
There is now a large sample of stars observed by the Kepler satellite with measured rotation periods and photometric activity index Sph. We use this data, in conjunction with stellar interiors models, to explore the interplay of magnetism, rotation, and convection. Stellar activity proxies other than Sph are correlated with t…
Orbits of Six Triple Systems
Tokovinin, Andrei
Joint analysis of position measurements and radial velocities of six triple stellar systems is conducted to determine their inner and/or outer orbits. Accumulation of such data is needed to study the architecture of stellar hierarchies and its relation to the formation mechanisms. The inner periods in the six systems (HIP 11783, 64836, 72423, 8472…
A new method for determining the onset times of solar energetic particles and their uncertainties: Poisson-CUSUM bootstrap hybrid method
Gutiérrez, C. P.; Vainio, R.; Dresing, N. +2 more
Context. Solar energetic particle (SEP) events are a type of space weather phenomena in which highly energetic charged particles are released from the Sun into interplanetary space by violent and eruptive phenomena, such as solar flares and coronal mass ejections. In order to assess the origin of SEPs, an accurate timing of their arrival at spacec…
The IACOB project: XIV. New clues on the location of the TAMS in the massive star domain
Simón-Díaz, S.; Urbaneja, M. A.; de Burgos, A. +4 more
Context. Massive stars play a very important role in many astrophysical fields. Despite their scarcity with respect to less-massive counterparts, their influence on the chemo-dynamical evolution of the galaxies is substantial. Yet, some fundamental aspects of their evolution remain poorly constrained. In this regard, there is an open debate on the…
The wide binary frequency of metal-poor stars
Clavero, R.; Martín, E. L.; Nespral, D. +5 more
Context. This study is aimed at identifying possible low-mass and sub-stellar companions to stars with well-determined metallicities. We investigate the multiplicity of metal-poor stars along with its impact on formation processes in the conditions of the early universe. Aims. Our goal is to look for wide common proper motion companions to metal-p…