CCD UBV photometry of 2279 stars in Sextans A is presented. Differences with the photometric scales of Sandage and Carlson (1985) and Hoessel et al. (1983) are...
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PublicaciónCCD photometry of resolved dwarf irregular galaxies. I - Sextans A
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PublicaciónCCD photometry of stars in the old open cluster NGC 188
CCD photometry for stars in three fields centered on the old open cluster NGC 188 is presented, with the aim of investigating the HR diagram distribution of...
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PublicaciónCCD UBVR photometry of two old open clusters: King 11 and Be42 - Comparison with theoretical models
This paper presents the Johnson-Cousins UBVR CCD photometry of two old rich open clusters toward the galactic anticenter: King 11 and Be 42. Included are the...
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PublicaciónChemical abundances and masses of the haloes around the planetary nebulae NGC 6543 and NGC 6826
Spatial resolved low resolution spectroscopy of the haloes around the planetary nebulae NGC 6543 and NGC 6826 were conducted. The results imply that the...
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PublicaciónChemical Evolution in the Milky Way: Rotation-based Ages for APOGEE-Kepler Cool Dwarf Stars
We use models of stellar angular momentum evolution to determine ages for ∼500 stars in the APOGEE-Kepler Cool Dwarfs sample. We focus on lower-main-sequence...
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PublicaciónCO /J = 2-1/ observations of southern H II regions
Maps in the CO (J = 2-1) line of the southern H II region complexes Carina Nebula and G333.6-0.2/RCW 106 are presented and discussed. Results for the Carina...
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PublicaciónCO mapping of bipolar outflows
The paper presents CO and (C-13)O J = 2-1 spectra and mapping of bipolar outflows, acquired with the 12-m NRAO antenna at Kitt Peak, for the following sources...
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PublicaciónConstraints to the masses of brown dwarf candidates form the lithium test
We present intermediate dispersion (0.7-2.2 A/pixel) optical spectroscopic observations aimed at applying the 'lithium test' to a sample of 10 brown dwarf...
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PublicaciónCore─Envelope Coupling in Intermediate-mass Core-helium Burning Stars
Stars between two and three solar masses rotate rapidly on the main sequence, and the detection of slow core and surface rotation in the core-helium burning...