Astrofísicas: Astrometría

  • Publicación
    HST Astrometry in the 30 Doradus Region. II. Runaway Stars from New Proper Motions in the Large Magellanic Cloud
    We present a catalog of relative proper motions for 368,787 stars in the 30 Doradus region of the Large Magellanic Cloud (LMC), based on a dedicated two-epoch...
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    Improved Hubble Space Telescope proper motions for Tycho-G and other stars in the remnant of Tycho's Supernova 1572
    With archival and new Hubble Space Telescope observations, we have refined the space-velocity measurements of the stars in the central region of the remnant of...
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    Individual dynamical masses of DENIS J063001.4-184014AB reveal a likely young brown dwarf triple
    The binary nature of the M8.5 dwarf DENIS J063001.4-184014AB (DE0630-18) was discovered with astrometric monitoring from the ground, which determined the...
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    Measurement and astrometric reduction of CCD images in Bucharest
    The paper presents the methods of measurement and astrometric reduction of the CCD images made at Bucharest Astronomical Observatory beginning with 1995. We...
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    More than 160 near Earth asteroids observed in the EURONEAR network
    Context. The EUROpean Near Earth Asteroid Research (EURONEAR) is a network which envisions to bring some European contributions into the general context traced...
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    New neighbours: II. An M9 dwarf at d ~ 4 pc, DENIS-P J104814.7-395606.1
    We present the discovery of a previously unknown member of the immediate solar neighbourhood, DENIS-P J104814.7-395606.1 (hereafter DENIS 1048-39), identified...
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    New runaway O-type stars in the first Gaia Data Release
    We have detected 13 new runaway-star candidates of spectral type O combining the TGAS (Tycho-Gaia Astrometric Solution) proper motions from Gaia Data Release 1...
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    Observing Near Earth Asteroids with a Small Telescope. I. Planning the Observations
    Even from a light-polluted city it is possible to observe Near Earth Asteroids (NEAs) at opposition using a small telescope equipped with a CCD camera. In this...
  • Publicación
    On the kinematics of the neutron star low mass X-ray binary Cen X-4
    We present the first determination of the proper motion of the neutron star low mass X-ray binary Cen X-4 measured from relative astrometry of the secondary...