Publications

This section contains the publications database that collects IAC articles published in scientific journals. Please, click on the arrow to see full search filter and sort options: author, journal, year, etc..

It also provides access to IAC Preprints Repository here: https://research.iac.es/preprints/

  • Multiprocessor data acquisition system for a 256x256-pixel infrared camera
    The Department of Detectors of the Instituto de Astrofisica de Canarias, Spain is developing a data acquisition system (DAS) for an infrared camera based in a 256 X 256 InSb detector. The camera is going to work from 1 to 5 microns wavelength, with a scale on the sky of 0.5 arcsec per pixel, and will be installed as a common user instrument at the
    Rodriguez-Ramos, Luis F. et al.

    Advertised on:

    4
    1993
    Citations
    0
  • The peculiar nature of BD + 24 deg 676
    The H-alpha emission star BD + 24 deg 676, formerly classified as a T Tauri star and more recently as a Herbig Ae star, has been observed at moderately high resolution in the red spectral region. The main results are: the metallic lines over the wavelength range 6400-6750 A have equivalent widths comparable to early G stars; the radial velocity is
    Martin, Eduardo L.

    Advertised on:

    3
    1993
    Citations
    8
  • The mass and helium discrepancy in massive stars: the case VELA X-1
    A NLTE-analysis is presented of high S/N spectra of the optical component of the standard massive X-ray binary Vela X-1. In combination with the orbital parameters we conclude that the optical star is highly helium enriched and is significantly overluminous compared to standard evolutionary tracks of massive accretion stars. We then propose a new
    Vanbeveren, D. et al.

    Advertised on:

    3
    1993
    Citations
    12
  • The kinematic structure of the unusual outflow source SH 2-71
    We have undertaken high resolution spectroscopy and IR photometry of the extended planetary nebula Sh 2-71. As a consequence, we note evidence for a discoidal expanding emission region size about 100 arcsec, tilted to the line of sight, and enveloping a core high-excitation source associated with velocities about +/- 500 km/s. Both NIR and optical
    Cuesta, L. et al.

    Advertised on:

    3
    1993
    Citations
    12
  • The fundamental parameters of the central stars of eight WR ring nebulae
    We describe work that has recently been completed on deriving the fundamental parameters of eight WR stars through the photoionization modelling of their surrounding nebulae using non-LTE WR flux distributions. The resulting effective temperatures range from 57 000 71 000 K for the WN4-5 stars and
    Smith, Linda J. et al.

    Advertised on:

    3
    1993
    Citations
    3
  • The continuum intensity-magnetic field relation in sunspot umbrae
    We describe the work carried out to obtain observational evidence of a local relation between the temperature and the magnetic field in different regions of several sunspots. Information about the temperature is extracted from the continuum intensity. The magnetic field is deduced by using the Stokes V profile of lines with different excitation
    Martinez Pillet, V. et al.

    Advertised on:

    3
    1993
    Citations
    81