Nebular Spectroscopy: A Guide on HII Regions and Planetary Nebulae

被引：96
|
作者：
Peimbert, Manuel [1 ]
Peimbert, Antonio [1 ]
Delgado-Inglada, Gloria [1 ]
机构：
[1] Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 2017年 / 129卷 / 978期
关键词：
ISM: abundances; (ISM:) HII regions; (ISM:) planetary nebulae: general; H-II REGIONS; PRIMORDIAL HELIUM ABUNDANCE; CHEMICAL-COMPOSITION; PHYSICAL CONDITIONS; GASEOUS NEBULAE; ORION NEBULA; PHOTOIONIZATION MODELS; RECOMBINATION LINES; OXYGEN ABUNDANCES; EMISSION-LINES;
D O I：
10.1088/1538-3873/aa72c3
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a tutorial on the determination of the physical conditions and chemical abundances in gaseous nebulae. We also include a brief review of recent results on the study of gaseous nebulae, their relevance for the study of stellar evolution, galactic chemical evolution, and the evolution of the universe. One of the most important problems in abundance determinations is the existence of a discrepancy between the abundances determined with collisionally excited lines and those determined by recombination lines: this is called abundance discrepancy factor (ADF) problem, and we review results related to it. Finally, we discuss the possible reasons for the large t(2) values observed in gaseous nebulae.
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页数：27
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