Search Publications
Asteroid spin and shape properties from Gaia DR3 photometry
Mignard, F.; Tanga, P.; Cellino, A. +1 more
Context. The third data release of Gaia, in June 2022, included the first large sample of sparse photometric data for more than 150 000 Solar System objects (SSOs), mainly asteroids.
Aims: The SSO photometric data can be processed to derive information on the physical properties for a large number of objects, including spin properties, surfac…
Yellow hypergiant V509 Cas: Stable in the `yellow void'
Kolka, I.; Kasikov, A.; Aret, A. +2 more
Context. The yellow hypergiant star
Sublimation of volatiles from H2O:CO2 bulk ices in the context of comet 67P/Churyumov-Gerasimenko. II. Noble gases
Wurz, P.; Altwegg, K.; Rubin, M. +6 more
Context. The ROSINA instrument on board the Rosetta spacecraft measured, among others, the outgassing of noble gases from comet 67P/Churyumov-Gerasimenko. The interpretation of this dataset and unravelling underlying desorption mechanisms requires detailed laboratory studies.
Aims: We aim to improve our understanding of the desorption pattern…
A star under multiple influences. Magnetic activity in V815 Her, a compact 2+2 hierarchical system
Strassmeier, K. G.; Weber, M.; Granzer, T. +7 more
Context. Close binaries with magnetically active components are astrophysical laboratories for studying the effects of binarity on activity. Of particular interest are binary and multiple star systems that contain a solar-type active component with an internal structure similar to the Sun, allowing us to study how the dynamo of a solar-type star w…
A study of two young multipolar planetary nebulae: Hen 2-73 and Hen 2-96
Wen, Shibo; Wang, Yong-Zhi; Hsia, Chih-Hao +4 more
We perform an infrared (IR) spectral and visible morphological study of two young planetary nebulae (YPNe) Hen 2-73 and Hen 2-96 using archival Spitzer Space Telescope and Hubble Space Telescope (HST) observations to understand their dust properties and nebular structures. High-resolution HST images of these nebulae show several bipolar lobes and …
The miniJPAS survey. Optical detection of galaxy clusters with PZWav
Finoguenov, A.; Hernán-Caballero, A.; Mendes de Oliveira, C. +21 more
Context. Galaxy clusters are an essential tool to understand and constrain the cosmological parameters of our universe. Thanks to its multi-band design, J-PAS offers a unique group and cluster detection window using precise photometric redshifts and sufficient depths.
Aims: We produced galaxy cluster catalogues from miniJPAS, which is a pathf…
The giant outburst of EXO 2030+375. II. Broadband spectroscopy and evolution
Wolff, M. T.; Wilms, J.; Pottschmidt, K. +13 more
In 2021, the high-mass X-ray binary EXO 2030+375 underwent a giant X-ray outburst, the first since 2006, that reached a peak flux of ∼600 mCrab (3-50 keV). The goal of this work is to study the spectral evolution over the course of the outburst, search for possible cyclotron resonance scattering features (CRSFs), and to associate spectral componen…
Impact of α enhancement on the asteroseismic age determination of field stars. Application to the APO-K2 catalogue
Valle, G.; Dell'Omodarme, M.; Prada Moroni, P. G. +1 more
Aims: We investigated the theoretical biases affecting the asteroseismic grid-based estimates of stellar mass, radius, and age in the presence of a mismatch between the heavy element mixture of observed stars and stellar models.
Methods: We performed a controlled simulation adopting a stellar effective temperature, [Fe/H], an average lar…
The Gaia-ESO Survey DR5.1 and Gaia DR3 GSP-Spec: a comparative analysis
Recio-Blanco, A.; de Laverny, P.; Vallenari, A. +10 more
Context. The third data release of Gaia, has provided stellar parameters, metallicity [M/H], [α/Fe], individual abundances, broadening parameter from its Radial Velocity Spectrograph (RVS) spectra for about 5.6 million objects thanks to the GSP-Spec module, implemented in the Gaia pipeline. The catalogue also publishes the radial velocity of 33 mi…
VVVX survey dusts off a new intermediate-age star cluster in the Milky Way disk
Minniti, D.; Saito, R. K.; Fernández-Trincado, J. G. +5 more
Context. In the last decade, many new star clusters have been discovered in heavily obscured regions of the Milky Way bulge and disk.
Aims: Our primary long-term objective is to seek out additional star clusters in the poorly studied regions of the Milky Way, where detections pose significant challenges. The aim of this pursuit is to finalize…