Search Results - "Peimbert, A."

Dynamics and morphology of the Milky Way spiral arms from the metallicity distribution and radial mixing by Martinez-Medina, L. A., Pichardo, B., Peimbert, A., Carigi, L.

“…Abstract Albeit radial migration must be a ubiquitous process in disc galaxies, its significance in the evolution of stellar discs is not always reflected…”
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Looking for nebular He ii emission south of the multiple-massive star system, HD 5980 by Sixtos, A, Wofford, A, Sander, A A C, Peimbert, A

“…ABSTRACT The nebular He ii λ1640 emission line is observed in star-forming galaxies out to large distances and can be used to constrain the properties of…”
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Revealing the spiral arms through radial migration and the shape of the metallicity distribution function by Martinez-Medina, L. A., Pichardo, B., Moreno, E., Peimbert, A.

“…Recent observations show that the Milky Way's metallicity distribution function (MDF) changes its shape as a function of radius. This new evidence of radial…”
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ON THE SURVIVAL OF HIGH-ALTITUDE OPEN CLUSTERS WITHIN THE MILKY WAY GALAXY TIDES by Martinez-Medina, L. A., Pichardo, B., Peimbert, A., Moreno, E.

“…ABSTRACT It is a common assumption that high-altitude open clusters live longer compared to clusters moving close to the Galactic plane. This is because, at…”
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A reappraisal of the chemical composition of the Orion nebula based on Very Large Telescope echelle spectrophotometry by Esteban, C., Peimbert, M., García-Rojas, J., Ruiz, M. T., Peimbert, A., Rodríguez, M.

“…ABSTRACT We present Very Large Telescope (VLT) UVES echelle spectrophotometry of the Orion nebula in the 3100–10 400 Å range. We have measured the intensity of…”
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Faint emission lines in the Galactic H ii regions M16, M20 and NGC 3603 by García-Rojas, J., Esteban, C., Peimbert, M., Costado, M. T., Rodríguez, M., Peimbert, A., Ruiz, M. T.

“…We present deep echelle spectrophotometry of the Galactic H ii regions M16, M20 and NGC 3603. The data have been taken with the Very Large Telescope…”
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The Effect of Collisional Enhancement of Balmer Lines on the Determination of the Primordial Helium Abundance by Luridiana, V, Peimbert, A, Peimbert, M, Cerviño, M

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Deep echelle spectrophotometry of S 311, a Galactic H ii region located outside the solar circle by García-Rojas, J., Esteban, C., Peimbert, A., Peimbert, M., Rodríguez, M., Ruiz, M. T.

“…We present echelle spectrophotometry of the Galactic H ii region S 311. The data have been taken with the Very Large Telescope Ultraviolet-Visual Echelle…”
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Non-Local Thermodynamic Equilibrium Model of NGC 6543's Central Star and Its Relation to the Surrounding Planetary Nebula by Georgiev, L. N, Peimbert, M, Hillier, D. J, Richer, M. G, Arrieta, A, Peimbert, A

“…We analyze the chemical composition of the central star of the planetary nebula NGC 6543 based on a detailed NLTE model of its stellar wind. The logarithmic…”
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Revised Primordial Helium Abundance Based on New Atomic Data by Peimbert, Manuel, Luridiana, Valentina, Peimbert, Antonio

“…We have derived a primordial helium abundance of Y sub(p) = 0.2477 plus or minus 0.0029, based on new atomic physics computations of the recombination…”
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The Chemical Composition of the 30 Doradus Nebula Derived from Very Large Telescope Echelle Spectrophotometry by Peimbert, Antonio

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Chemical Composition of Two H II Regions in NGC 6822 Based on VLT Spectroscopy by Peimbert, Antonio, Peimbert, Manuel, Ruiz, María Teresa

“…We present long-slit spectrophotometry of regions V and X of the Local Group irregular galaxy NGC 6822. The data consist of VLT FORS observations in the…”
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Temperature Bias and the Primordial Helium Abundance Determination by Peimbert, Antonio, Peimbert, Manuel, Luridiana, Valentina

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PITCH ANGLE RESTRICTIONS IN LATE-TYPE SPIRAL GALAXIES BASED ON CHAOTIC AND ORDERED ORBITAL BEHAVIOR by PEREZ-VILLEGAS, A, PICHARDO, B, MORENO, E, PEIMBERT, A, VELAZQUEZ, H. M

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Very Large Telescope Echelle Spectrophotometry of the Planetary Nebula NGC 5307 and Temperature Variations by Ruiz, María Teresa, Peimbert, Antonio, Peimbert, Manuel, Esteban, César

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Chemical evolution models for the Galactic disk based on H II region abundances derived from a direct method and a temperature independent method by Carigi, L, Peimbert, M, Peimbert, A

“…We present two chemical evolution models of our galaxy, both models are built to fit the O/H ratios derived from H II regions, using two different methods. One…”
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The ADF and the t$^2$ formalism in H II regions based on the upper mass limit of the IMF for the MW by Carigi, L, Peimbert, A, Peimbert, M, Delgado-Inglada, G

“…We study in depth the abundance discrepancy problem in H II regions, this time from a different perspective than the usual one: by studying the effect of the…”
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Molecular Hydrogen in the Direction of ζ Orionis A by Jenkins, Edward B, Peimbert, Antonio

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Deep echelle spectrophotometry of S 311, a Galactic H ii region located outside the solar circle by García-Rojas, J., Esteban, C., Peimbert, A., Peimbert, M., Rodríguez, M., Ruiz, M. T.

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Faint emission lines in the Galactic H ii regions M16, M20 and NGC 3603 by García-Rojas, J., Esteban, C., Peimbert, M., Costado, M. T., Rodríguez, M., Peimbert, A., Ruiz, M. T.

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