415 datasets found

Keywords: stellar ages

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  • Lupus DANCe. Census and 6D structure with Gaia-DR2

    Lupus is recognised as one of the closest star-forming regions, but the lack of trigonometric parallaxes in the pre-Gaia era hampered many studies on the kinematic properties of...
  • K2-Gaia-ESO stellar param. and abundances

    The extensive stellar spectroscopic datasets that are available for studies in Galactic Archeaology thanks to, for example, the Gaia-ESO Survey, now benefit from having a...
  • Age dissection of the Milky Way discs

    Ensemble studies of red-giant stars with exquisite asteroseismic (Kepler), spectroscopic (APOGEE), and astrometric (Gaia) constraints offer a novel opportunity to recast and...
  • Chromospheric activity from AMBRE-HARPS

    The main objective of this project is to characterise chromospheric activity of FGK stars from the HARPS archive. We start, in this first paper, by presenting a catalogue of...
  • TRAPPIST-1 analogue stars TESS light curves

    As more exoplanets are being discovered around ultracool dwarfs, understanding their magnetic activity - and the implications for habitability - is of prime importance. To find...
  • Homogeneous study of Herbig Ae/Be stars

    Herbig Ae/Be stars (HAeBes) have so far been studied based on relatively small samples that are scattered throughout the sky. Their fundamental stellar and circumstellar...
  • Titans metal-poor reference stars. I.

    Several large stellar spectroscopic surveys are producing overwhelming amounts of data that can be used for determining stellar atmospheric parameters and chemical abundances....
  • SHINE sample definition

    Large surveys with new-generation high-contrast imaging instruments are needed to derive the frequency and properties of exoplanet populations with separations from 5 to 300au....
  • Kinematic properties of white dwarfs

    Kinematic and chemical tagging of stellar populations have both revealed much information on the past and recent history of the Milky Way, including its formation history,...
  • CHIPS II. O stars in Trumpler 14 CHIPS-Tr14

    Most massive stars belong to multiple systems, yet the formation process leading to such high multiplicity remain insufficiently understood. To help constrain the different...
  • 178 debris systems

    We know little about the outermost exoplanets in planetary systems because our detection methods are insensitive to moderate-mass planets on wide orbits. However, debris discs...
  • BHeB stars in the Leo A galaxy

    Leo A is a gas-rich dwarf irregular galaxy of low stellar mass and metallicity. Its star formation history extends up to ~10Gyr. A few prominent HII regions indicate that star...
  • AMBRE catalogue of stellar [Mg/Fe] and ages

    The [Mg/Fe] abundance ratios are a fundamental fossil signature used to trace the chemical evolution of the disc and to divide it into low-{alpha} and high-{alpha} populations....
  • Parameters for 25 distant open clusters

    Several studies have been presented in the last few years applying some kind of automatic processing of data to estimate the fundamental parameters of open clusters. These...
  • Chemo-dynamic features of super-metal-rich stars

    The solar vicinity is currently populated by a mix of stars with various chemo-dynamical properties, including stars with a high metallicity compared to the Sun. Dynamical...
  • Planets around stars with wide brown dwarfs

    The project aims to understand better the role of wide brown dwarf companions on planetary systems. We obtained high-resolution spectra of six bright stars with co-moving wide...
  • Stars with debris disks and planets

    The nature of the few known solar mass stars containing debris disks and planets simultaneously remains an open question. Many authors have shown that this property appears to...
  • Milky Way global survey of star clusters. VII.

    We built Galactic open star cluster mass functions (CMFs) for different age sub-samples and spatial locations in the wider solar neighbourhood. Here, we present a simple cluster...
  • StarHorse data for 8 spectroscopic surveys

    The Gaia mission has provided an invaluable wealth of astrometric data for more than a billion stars in our Galaxy. The synergy between Gaia astrometry, photometry, and...
  • Old Galactic stellar populations

    Over its history, the Milky Way has accreted several smaller satellite galaxies. These mergers added stars and gas to the Galaxy and affected the properties of the pre-existing...
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