Search Publications
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…
Observations of whistler mode waves by Solar Orbiter's RPW Low Frequency Receiver (LFR): In-flight performance and first results
Maksimovic, M.; Bale, S. D.; Chust, T. +29 more
Context. The Radio and Plasma Waves (RPW) instrument is one of the four in situ instruments of the ESA/NASA Solar Orbiter mission, which was successfully launched on February 10, 2020. The Low Frequency Receiver (LFR) is one of its subsystems, designed to characterize the low frequency electric (quasi-DC - 10 kHz) and magnetic (∼1 Hz-10 kHz) field…
Detection of volatiles undergoing sublimation from 67P/Churyumov-Gerasimenko coma particles using ROSINA/COPS. I. The ram gauge
Altwegg, K.; Balsiger, H.; Rubin, M. +5 more
Context. The ESA Rosetta mission has allowed for an extensive in situ study of the comet 67P/Churyumov-Gerasimenko. In measurements performed by the ram gauge of the COmet Pressure Sensor (COPS), observed features are seen to deviate from the nominal ram gauge signal. This effect is attributable to the sublimation of the volatile fraction of comet…
A search for X-ray absorbed sources in the 3XMM catalogue using photometric redshifts and Bayesian spectral fits
Georgantopoulos, I.; Corral, A.; Ruiz, A.
Since its launch in 1999, the XMM-Newton mission has compiled the largest catalogue of serendipitous X-ray sources, with the 3XMM being the third version of this catalogue. This was possible thanks to the combination of a large effective area (5000 cm2 at 1 keV) and a wide field of view (30 arcmin). The 3XMM-DR6 catalogue contains about…
The bi-modal 7Li distribution of the Milky Way's thin-disk dwarf stars. The role of Galactic-scale events and stellar evolution
Cifuentes, C.; Roca-Fàbrega, S.; Llorente de Andrés, F. +2 more
Context. The lithium abundance, A(Li), in stellar atmospheres suffers from various enhancement and depletion processes during the star's lifetime. While several studies have demonstrated that these processes are linked to the physics of stellar formation and evolution, the role that Galactic-scale events play in the galactic A(Li) evolution is not…
Multi-wavelength observations and modelling of a quiescent cloud LDN1512
Ysard, Nathalie; Juvela, Mika; Saajasto, Mika +2 more
Context. Light scattering at near-infrared (NIR) wavelengths has been used to study the optical properties of the interstellar dust grains, but these studies are limited by the assumptions on the strength of the radiation field. On the other hand, thermal dust emission can be used to constrain the properties of the radiation field, although this i…