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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PublicationAnisotropy measurements of the cosmic microwave background radiation at intermediate angular scales
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PublicationBlue 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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PublicationComplex 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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PublicationConstraints 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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PublicationCS 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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PublicationDetailed 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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PublicationDifferential 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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PublicationDynamical 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...
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PublicationEvidence 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...