Zobrazeno 1 - 10
of 5 940
pro vyhledávání: '"A. Peimbert"'
Autor:
Peimbert, M., Peimbert, A.
We present a review about the relevance of the paper by Peimbert and Costero (1969), on the chemical abundance determinations of H II regions. We analize the observational evidence in favor of the presence of temperature variations inside gaseous neb
Externí odkaz:
http://arxiv.org/abs/0912.3781
The long-term evolution of the outer Solar System is subject to the influence of the giant planets, however, perturbations from other massive bodies located in the region imprint secular signatures, that are discernible in long-term simulations. In t
Externí odkaz:
http://arxiv.org/abs/2410.16570
The capability to efficiently search for objects in complex environments is fundamental for many real-world robot applications. Recent advances in open-vocabulary vision models have resulted in semantically-informed object navigation methods that all
Externí odkaz:
http://arxiv.org/abs/2409.11764
In this paper we present a re-analysis of the criteria used to characterize the Peimbert classes I, IIa, IIb, III and IV, through a statistical study of a large sample of planetary nebulae previously classified according to these groups. In the origi
Externí odkaz:
http://arxiv.org/abs/0709.0711
Planetary Nebulae (PNe) abundance patterns have long been used to note signatures of nuclear processing and to trace the distribution of metals throughout galaxies. We present abundance gradients and heavy element ratios based upon newly acquired spe
Externí odkaz:
http://arxiv.org/abs/astro-ph/0605066
Autor:
Méndez-Delgado, J. Eduardo, Esteban, César, García-Rojas, Jorge, Kreckel, Kathryn, Peimbert, Manuel
In a very recent work, [1] claim that the scenario of temperature inhomogeneities proposed by [2] ($t2$ > 0) is not able to explain the O$^{2+}$/H$^{+}$ abundance discrepancy observed between the calculations based on the optical [OIII] collisional e
Externí odkaz:
http://arxiv.org/abs/2310.01197
Autor:
Torres-Peimbert, Silvia1
Publikováno v:
Proceedings of the International Astronomical Union. Dec2023, Vol. 18 Issue T30, p20-26. 7p.
Autor:
Méndez-Delgado, J. E., Esteban, C., García-Rojas, J., Arellano-Córdova, K. Z., Kreckel, K., Gómez-Llanos, V., Egorov, O. V., Peimbert, M., Orte-García, M.
We present a first study based on the analysis of the DEep Spectra of Ionized REgions Database (DESIRED). This is a compilation of 190 high signal-to-noise ratio optical spectra of HII regions and other photoionized nebulae, mostly observed with 8-10
Externí odkaz:
http://arxiv.org/abs/2305.13136
Autor:
Méndez-Delgado, J. Eduardo, Esteban, César, García-Rojas, Jorge, Kreckel, Kathryn, Peimbert, Manuel
HII regions, ionized nebulae where massive star formation has taken place, exhibit a wealth of emission lines that are the fundamental basis for estimating the chemical composition of the Universe. For more than 80 years, a discrepancy of at least a
Externí odkaz:
http://arxiv.org/abs/2305.11578
Publikováno v:
MNRAS, 519, 5656 (2023)
The nebular He II {\lambda}1640 emission line is observed in star forming galaxies out to large distances and can be used to constrain the properties of sources of He+ ionizing photons. For this purpose, it is crucial to understand which are the main
Externí odkaz:
http://arxiv.org/abs/2303.04243