The Magellanic Clouds and the Primordial Helium Abundance

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dc.creatorPeimbert, Manuel Peimbert Antonio
dc.date2000-02-05
dc.date.accessioned2026-07-07T01:52:08Z
dc.date.available2026-07-07T01:52:08Z
dc.descriptionA 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.description10 pages, 1 figure, IAU Symposium 198
dc.identifierhttps://arxiv.org/abs/astro-ph/0002120
dc.identifierhttp://arxiv.org/abs/astro-ph/0002120
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/524
dc.subjectAstrophysics
dc.titleThe Magellanic Clouds and the Primordial Helium Abundance
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