A5103233551- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Isotope Analysis in Ecology
- Geophysics and Gravity Measurements
- Planetary Science and Exploration
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Geological and Geophysical Studies
- Atmospheric Ozone and Climate
- Space Exploration and Technology
- Astrophysics and Star Formation Studies
National Institute for Astrophysics
2024
Osservatorio di Astrofisica e Scienza dello Spazio
2024
Aarhus University
2022-2024
University of Bologna
2023-2024
Netherlands Institute for Radio Astronomy
2023-2024
Nordic Optical Telescope
2023
Osservatorio astronomico di Bologna
2023
Context. The origin of apparently young α -rich stars in the Galaxy is still a matter debate Galactic archaeology, whether they are genuinely or might be products binary evolution, and mergers mass accretion. Aims. Our aim to shed light on nature Milky Way by studying their distribution thanks an unprecedented sample giant that cover different regions have precise asteroseismic ages, chemical kinematic measurements. Methods. We analyzed new ∼6000 with ages coming from asteroseismology....
We conducted optical polarimetry and near-infrared spectroscopy of JAXA's Hayabusa2# mission target, (98943) 2001 CC21, in early 2023. Our new observations indicated that this asteroid has a polarimetric inversion angle ~21 deg, absorption bands around 0.9 1.9 um, geometric albedo 0.285 +- 0.083. All these features are consistent with those S-type but inconsistent L-type. Based on evidence, we conclude spacecraft will explore an size (0.42-0.56 km when assume the absolute magnitude 18.6)...
Context. Asteroseismic investigations of solar-like oscillations in giant stars allow for the derivation their masses and radii. For members open clusters, this allows us to obtain an age estimate cluster that is expected be identical given by colour-magnitude diagram, but independent uncertainties are present type analysis. Thus, a more precise accurate can obtained. Aims. We aim identify measure asteroseismic properties oscillating NGC 6866 utilise them estimate. Model comparisons also...
Abstract The Earth close approach of near-Earth asteroid 2005 LW3 on 2022 November 23 represented a good opportunity for second observing campaign to test the timing accuracy astrometric observation. With 82 participating stations, International Asteroid Warning Network collected 1046 observations around time approach. Compared previous targeting 2019 XS, some individual observers were able significantly improve their reported observation times. In particular, U.S. surveys achieved...
ABSTRACT Asteroseismic scaling relations can provide high-precision measurements of mass and radius for red giant (RG) stars displaying solar-like oscillations. Their accuracy be validated potentially improved using independent accurate observations mass, radius, effective temperature metallicity. We seek to achieve this long period SB2 eclipsing binaries hosting oscillating RGs. explore KIC 8430105, which a previous study found significant asteroseismic overestimation when compared with...
Context. Asteroseismic investigations of solar-like oscillations in giant stars enable the derivation their masses and radii. For mono-age mono-metallicity populations this allows integrated red branch (RGB) mass loss to be estimated by comparing median low-luminosity RGB that helium-core-burning (HeCB). Aims. We aim exploit quasi field $\alpha$-rich sequence Milky Way (MW) derive its dependence on metallicity. By metal-rich globular clusters (GCs), we wish determine whether differs two...
Context. Asteroseismic investigations of solar-like oscillations in giant stars enable the derivation their masses and radii. For mono-age mono-metallicity populations stars, this allows integrated red branch (RGB) mass loss to be estimated by comparing median low-luminosity RGB that helium-core-burning (HeCB) stars. Aims. We aim exploit quasi-mono-age field α -rich sequence Milky Way (MW) derive its dependence on metallicity. By comparison metal-rich globular clusters (GCs), we wish...
We conducted optical polarimetry and near-infrared spectroscopy of JAXA's Hayabusa2# mission target, (98943) 2001 CC21, in early 2023. Our new observations indicated that this asteroid has a polarimetric inversion angle ~21 deg, absorption bands around 0.9 1.9 um, geometric albedo 0.285 +- 0.083. All these features are consistent with those S-type but inconsistent L-type. Based on evidence, we conclude spacecraft will explore an size (0.42-0.56 km when assume the absolute magnitude 18.6)...
Asteroseismology of solar-like oscillations in giant stars allow the derivation their masses and radii. For members open clusters this allows an age estimate cluster which should be identical to from colour-magnitude diagram, but independent uncertainties that are present for type analysis. Thus, a more precise accurate can obtained. We aim measure asteroseismic properties oscillating NGC 6866 utilise these estimate. Model comparisons constraints on stellar physics, here we investigate...
The origin of apparently young $\alpha$-rich stars in the Galaxy is still a matter debate Galactic archaeology, whether they are genuinely or might be products binary evolution and merger/mass accretion. We aim to shed light on nature Milky Way by studying their distribution thanks an unprecedented sample giant that cover different regions have precise asteroseismic ages, chemical, kinematic measurements. analyze new $\sim$ 6000 with ages coming from asteroseismology. Our combines global...