Journal: New Astronomy

  • Publication
    155-day Periodicity in solar cycles 3 and 4
    The near 155 days solar periodicity, so called Rieger periodicity, was first detected in solar flares data and later confirmed with other important solar...
  • Publication
    A far infrared polarimeter
    We describe an experiment to measure calibration sources, the polarization of Cosmic Microwave Background Radiation (CMBR) and the polarization induced on the...
  • Publication
    A photometric and spectroscopic study of the binary V1430 Aql
    We present the first infrared light curves of the binary V1430 Aql, in the bands J and K, plus V, R and I light curves and spectra covering the ranges of Hβ, Hα...
  • Publication
    A theory of gamma-ray bursts
    Recent observations and theoretical considerations have linked gamma-ray bursts with ultra-bright type Ibc supernovae (`hypernovae'). We here work out a...
  • Publication
    A time-series VI study of the variable stars of the globular cluster NGC 6397
    We present a new time-series VI CCD photometry of the globular cluster NGC 6397, from which we obtained and analysed the light curves of 35 variables carefully...
  • Publication
    Absolute parameters of the Algol binary Z Vul
    Spectra in the wavelength range 4230-9150 Å and the first light curves of Z Vul in the infrared J, H and K bands are presented. Our infrared JHK light curves...
  • Publication
    Absolute parameters of the short-period binary HY Virginis from JHK light curves and spectroscopy
    We present the first light curves in the infrared J, H and K filters of HY Vir. Based on HY Vir and template stars spectra in the region 8440 8870 Å, we...
  • Publication
    Abundance analysis of a sample of evolved stars in the outskirts of ω Centauri
    The globular cluster ω Centauri (NGC 5139) is a puzzling stellar system harboring several distinct stellar populations whose origin still represents a unique...
  • Publication
    An estimation of global solar p-mode frequencies from IRIS network data: 1989-1996
    The IRIS network has accumulated full disk helioseismological data since July 1989, i.e. a complete 11-year solar cycle. Since the last paper publishing a...