Astrophysical: Variable stars

  • Publication
    3-D Study of the Nebula Around the Symbiotic Mira He2-147
    The expansion in the plane of the sky of the nebula around the symbiotic nova He2-147 has been resolved by means of two HST WFPC2 [NII] images taken 3 years...
  • Publication
    A new pulsating PG 1159 white dwarf - RXJ 2117.1 + 3412
    RXJ 2117.1 + 3412 is a newly spectroscopically identified bright PG1159 star discovered in the ROSAT XRT sky survey. We report the results of rapid photometry...
  • Publication
    A stronger He II 4686 in the spectrum of the planetary nebula NGC 6572
    On a recent spectrogram of the planetary nebula NGC 6572 the authors have found He II 4686 clearly in emission. They review previous descriptions of the...
  • Talk
    Atmospheric Dynamics in Mira Stars: A Spectropolarimetric Insight
    To study the extended atmosphere of evolved stars such as Mira-type variables, spectropolarimetry is an innovative tool. For many kinds of stars, it has been...
  • Publication
    Chromospheric variability in late-type dwarfs from high-resolution spectra of CA II H
    An analysis is presented of high-resolution high SNR spectra of late-type chromospherically active dwarfs in Ca II H. Observational parameters employed are the...
  • Publication
    Circumstellar matter around the RS CVn system II Peg
    The RS CVn noneclipsing system II Peg has been observed in the J, H, K, L, and M infrared bands along a complete period. The shape of the light curve shows an...
  • Talk
    Collapsograms: measurement of low signal-to-noise-ratio solar p modes in spatially-resolved helioseismic data
    1.- I will give an overview of WeCAPP (Wendelstein Calar Alto Pixellensing Project), a microlensing survey towards the Andromeda galaxy. WeCAPP monitored the...
  • Publication
    High-speed infrared photometry of rapidly oscillating AP (roAp) stars - 10 Aquilae
    High-speed photometric observations of the recently discovered roAp star 10 Aql were performed in the J(1.22-micrometer) filter. A total of 47.2 hours of data...
  • Publication
    MASTER Optical Observation of LIGO/VIRGO S200302c Event
    The results of LIGO/Virgo S200302c (O3) error-box optical inspection by MASTER are presented. We observed 4242 square degrees square degrees inside 3σ error box...