Publicaciones

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  • Characterization of Magnetic Flux in the Quiet Sun. II. The Internetwork Fields at High Angular Resolution
    This paper presents high-resolution (0.6") spectropolarimetric observations of very quiet solar regions. We make determinations of the magnetic flux density, intrinsic field strength, and magnetic filling factor in these regions. Our results confirm other previous works in that most of the internetwork flux is in the form of intrinsically strong
    Lites, B. W. et al.

    Fecha de publicación:

    9
    2004
    Número de citas
    66
  • Characterization of the Nucleus of 103P/Hartley 2 for the EPOXI Mission
    With the recovery of comet 103P/Hartley 2, the target of the EPOXI mission, we have begun the characterization of the nucleus necessary for the mission. Observations from past apparitions of this comet show that it typically begins activity while far from the sun, near r = 4 AU (about 450 days pre-perihelion). This makes obtaining information about
    Meech, Karen Jean et al.

    Fecha de publicación:

    9
    2009
    Número de citas
    0
  • Characterizing bar structures: application to NGC 1300, NGC 7479 and NGC 7723
    Detailed surface photometry has been carried out for three barred galaxies with use of high resolution CCD broad-band images in the B, V and I bands. Using azimuthal luminosity profiles and their decomposition into Fourier Series, the structural parameters (length and strength) of the bars in the three galaxies have been obtained. We have also
    Aguerri, J. A. L. et al.

    Fecha de publicación:

    9
    2000
    Número de citas
    79
  • Chemical abundance gradients from open clusters in the Milky Way disk: Results from the APOGEE survey
    Metallicity gradients provide strong constraints for understanding the chemical evolution of the Galaxy. We report on radial abundance gradients of Fe, Ni, Ca, Si, and Mg obtained from a sample of 304 red-giant members of 29 disk open clusters, mostly concentrated at galactocentric distances between ˜ 8-15 kpc, but including two open clusters in
    Cunha, K. et al.

    Fecha de publicación:

    9
    2016
    Número de citas
    48
  • Chemical abundance of 12 stars in open clusters (Carrera+, 2011)
    Using high-resolution (R~30000), high-quality (S/N>=60 per pixel), we obtained spectra for twelve stars in four open clusters with the fibre spectrograph FOCES, at the 2.2 Calar Alto Telescope in Spain.We employ a classical equivalent-width analysis to obtain accurate abundances of sixteen elements: Al, Ba, Ca, Co, Cr, Fe, La,Mg, Na, Nd, Ni, Sc, Si
    Carrera, R. et al.

    Fecha de publicación:

    9
    2011
    Número de citas
    0
  • Chemical Abundances and Kinematics of the Ring Nebula and Its Halos
    We have obtained new narrowband CCD images, spatially resolved intermediate- and high-dispersion spectroscopic observations of the Ring Nebula (NGC 6720). These data reveal that the bright main nebula is not a real ring, but a closed shell. A prolate ellipsoidal geometry for this shell is inferred from the observed tilts in the [N II] velocity
    Guerrero, M. A. et al.

    Fecha de publicación:

    9
    1997
    Número de citas
    38