摘要: The study of HII regions in the disks spiral galaxies has given us important information about their physical conditions. In particular chemical abundances soon showed existence negative gradients with higher abundance towards centre a galaxy (e.g. Pagel and Edmunds 1981; McCall 1982; Diaz 1989; Dinerstein 1990).
springer.com
harvard.edu
sci-hub.st 参考文章(36)
D. R. Garnett, G. A. Shields, The composition gradient across M81 The Astrophysical Journal. ,vol. 317, pp. 82- ,(1987) , 10.1086/165257
B. E. J. Pagel, J. E. Beckman, Evolutionary phenomena in galaxies epg. ,(1989)
Harriet L. Dinerstein, Abundances in Extragalactic H II Regions ASSL. ,vol. 161, pp. 257- 286 ,(1990) , 10.1007/978-94-009-0595-5_10
Phil Maloney, Mass determinations from CO observations ASSL. ,vol. 161, pp. 493- 524 ,(1990) , 10.1007/978-94-009-0595-5_21
M. B. Vila-Costas, M. G. Edmunds, The nitrogen-to-oxygen ratio in galaxies and its implications for the origin of nitrogen Monthly Notices of the Royal Astronomical Society. ,vol. 265, pp. 199- 212 ,(1993) , 10.1093/MNRAS/265.1.199
Jean P. Brodie, John P. Huchra, Extragalactic globular clusters. III - Metallicity comparisons and anomalies The Astrophysical Journal. ,vol. 379, pp. 157- 167 ,(1991) , 10.1086/170492
M. B. Vila-Costas, M. G. Edmunds, The relation between abundance gradients and the physical properties of spiral galaxies Monthly Notices of the Royal Astronomical Society. ,vol. 259, pp. 121- 145 ,(1992) , 10.1093/MNRAS/259.1.121
A. I. Diaz, M. Tosi, The chemical evolution of spiral galaxies: the Galaxy, M31, M33, M83 and M101 Monthly Notices of the Royal Astronomical Society. ,vol. 208, pp. 365- 377 ,(1984) , 10.1093/MNRAS/208.2.365
Alison Campbell, Physical conditions in H II galaxies The Astrophysical Journal. ,vol. 335, pp. 644- ,(1988) , 10.1086/166955
Robert C., Jr. Kennicutt, Donald R. Garnett, The Composition Gradient in M101 Revisited. I. H II Region Spectra and Excitation Properties The Astrophysical Journal. ,vol. 456, pp. 504- ,(1996) , 10.1086/176675