Premium
Soft gamma‐ray repeaters and superstrong magnetic fields
Author(s) -
Murakami T.
Publication year - 1999
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/1521-3994(199908)320:4/5<257::aid-asna257>3.0.co;2-k
Subject(s) - magnetar , physics , pulsar , astrophysics , dipole , economic shortage , gamma ray , gauss , magnetic dipole , period (music) , magnetic field , neutron star , astronomy , quantum mechanics , linguistics , philosophy , government (linguistics) , acoustics
Four Soft Gamma‐ray Repeaters were observed with ASCA, RXTE and BeppoSAX in X‐ray. Two were already identified to a pulsar of 7.47 s and 5.16 s in period. The periods and the period derivatives enable us to estimate magnetic dipole moments. These are extremely strong of almost 10 15 Gauss. Shortage of the rotational energy to explain the observed luminosities and the SGR activities are naturally explained by the Magnetar model by Thompson and Duncun. A possibility to explain the classical GRBs by a giant energy release at the birth of magnetars is also mentioned.