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Showing 1–6 of 6 results
Advanced filters: Author: C. Pallanca Clear advanced filters

  • The origin of blue straggler stars (BSSs) is still unclear. Here the authors show that the BSS and binary fractions correlate with the host cluster parameters, indicating that BSSs have a binary-related origin mediated by the environment.

    • Francesco R. Ferraro
    • Barbara Lanzoni
    • Giampaolo Piotto
    ResearchOpen Access
    Nature Communications
    Volume: 17, P: 1-11

  • Using the GRAVITY+ instrument, dynamical measurement of the black hole mass in a quasar at a redshift of 2.3 (11 billion years ago) shows how the relationship between galaxies and black holes evolves with time.

    • R. Abuter
    • F. Allouche
    • G. Zins
    ResearchOpen Access
    Nature
    Volume: 627, P: 281-285

  • Blue Stragglers Stars (BSSs) are anomalously luminous main sequence stars in clusters. Here, the authors show evidence that the fraction of fast rotating BSSs increases for decreasing central density of the host system, suggesting fast spinning BSSs prefer low-density environments.

    • Francesco R. Ferraro
    • Alessio Mucciarelli
    • Mario Mateo
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-8

  • The range of sizes of old star clusters in the LMC does not necessarily imply the presence of binary black holes within them; the spread can be explained as a consequence of internal dynamical evolution and formation conditions. Looking at five old LMC clusters, Ferraro et al. find signs of dynamical youth.

    • F. R. Ferraro
    • B. Lanzoni
    • C. Pallanca
    Research
    Nature Astronomy
    Volume: 3, P: 1149-1155

  • Rather than cooling down according to a well-established rate, some ~70% of the white dwarfs in globular cluster M13 are delaying their stellar demise by burning left-over hydrogen conserved by skipping the third dredge-up event.

    • Jianxing Chen
    • Francesco R. Ferraro
    • Emanuele Dalessandro
    Research
    Nature Astronomy
    Volume: 5, P: 1170-1177

  • A globular cluster-like system in the Galactic bulge hosts two stellar populations with remarkably different ages, identifying it as a site of recent star formation and providing observational proof for the hierarchical assembly of the Milky Way spheroid.

    • F. R. Ferraro
    • C. Pallanca
    • G. Beccari
    Research
    Nature Astronomy
    Volume: 5, P: 311-318