Astrophysical: Astronomical models

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    Anisotropy measurements of the cosmic microwave background radiation at intermediate angular scales
    Galaxy formation by gravitational instability implies the presence of temperature fluctuations in the cosmic microwave background. New observations at 10.45 and...
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    Blue stragglers and the binary hypothesis
    An observational test of the binary hypothesis for the origin of blue straggler stars is conducted by searching for radial velocity variables among 30 blue...
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    Complex ionization structure and kinematics in the circumnuclear region of NGC 3227
    We present bidimensional spectroscopy of the circumnuclear region of the Seyfert galaxy NGC 3227. The physical and kinematical characteristics of the two...
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    Constraints on theories of galaxy formation from measurements of fluctuations in the CMB
    Current observational constraints on anisotropies in the cosmic microwave background (CMB) and on the clustering of galaxies have considerably narrowed the...
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    CS J = 5 - 4 observations of galactic molecular clouds
    Observations from a sample of six regions of star formation in the 244 GHz, J = 5-4 rotational transition of CS, together with previous results for lower...
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    Detailed spectrophotometric study of the giant H II region NGC 604
    Detailed spectrophotometry in the visual and near-infrared is presented for four different slit positions over the core of NGC 604. The excitation ([O II]/[O...
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    Differential rotation and the SPOT zones
    Doppler measurements, using the Capri magnetograph, of the latitudinal fine structure of the solar differential rotation have been carried out. The positions of...
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    Dynamical simulations of the interacting galaxies in the NGC 520/UGC 957 system
    Numerical simulations of the interacting galaxies in the NGC 520/UGC 957 system are presented. Two sets of models were produced to investigate the postulated...
  • Publication
    Evidence for supersonic downflows in the photosphere of a delta sunspot
    We present polarization profiles observed with the High Altitude Observatory/National Solar Observatory (HAO/NSO) Advanced Stokes Polarimeter (ASP) that...