The Magellanic Clouds and the Primordial Helium Abundance
| dc.creator | Peimbert, Manuel Peimbert Antonio | |
| dc.date | 2000-02-05 | |
| dc.date.accessioned | 2026-07-25T10:59:48Z | |
| dc.description | A new determination of the pregalactic helium abundance based on the Magellanic Clouds H II regions is discussed. This determination amounts to Yp = 0.2345 +- 0.0030 and is compared with those derived from giant extragalactic H II regions in systems with extremely low heavy elements content. It is suggested that the higher primordial value derived by other authors from giant H II region complexes could be due to two systematic effects: the presence of neutral hydrogen inside the helium Stromgren sphere and the presence of temperature variations inside the observed volume. | |
| dc.description | 10 pages, 1 figure, IAU Symposium 198 | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0002120 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0002120 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/479 | |
| dc.subject | Astrophysics | |
| dc.title | The Magellanic Clouds and the Primordial Helium Abundance | |
| dc.type | text |