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COMPTEL observations of 44Ti gamma-ray line emission from Cas Aстатья
Информация о цитировании статьи получена из
Web of Science
Дата последнего поиска статьи во внешних источниках: 19 октября 2015 г.
- Авторы: Iyudin A.F., Diehl R., Lichti G.G., Schönfelder V.Steinle H, Bloemen H., Hermsen W., de Vries C., Morris D., Ryan J., Varendorff M., Winkler C.
- Сборник: Second COMPTON Symposium
- Серия: AIP Conference Proceedings
- Том: 304
- Год издания: 1994
- Издательство: AIP Publishing
- Местоположение издательства: United States
- Первая страница: 156
- Последняя страница: 160
- DOI: 10.1063/1.45612
- Аннотация: The COMPTEL telescope on board the Compton Gamma‐Ray Observatory (CGRO) is capable of imaging gamma‐ray line sources in the MeV region at a sensitivity of the order of 10− 5 photons/(cm2s). During two observation periods in July 1992 and February 1993 the Galactic plane in the region of the young supernova remnant Cas A was observed. Imaging and spectral analyses show evidence for line emission of 44Ti at 1.16 MeV from a position of Cas A at a significance level of ∼4 σ. This is the first time a supernova remnant has been detected in the gamma‐ray line from 44Ti decay. If the Cas A supernova remnant is placed at 2.8 kpc then the measured line flux can be translated into a 44Ti mass, ejected during the Cas A supernova explosion, between (1.40±0.35) ⋅ 10− 4 M⊙ and (3.2±0.8) ⋅ 10− 4 M⊙, depending on the precise value of the 44Ti mean life time value and on the precise date of the event. Implications of this result for supernova nucleosynthesis models are discussed.
- Добавил в систему: Июдин Анатолий Федорович