Magnetars' Giant Flares: the Case of SGR 1806–20
نویسندگان
چکیده
منابع مشابه
Magnetars ’ Giant Flares : the case of SGR 1806 - 20
We first review on the peculiar characteristics of the bursting and flaring activity of the Soft Gamma-ray Repeaters and Anomalous Xray Pulsars. We then report on the properties of the SGR 1806-20’s Giant Flare occurred on 2004 December 27th, with particular interest on the pre and post flare intensity/hardness correlated variability. We show that these findings are consistent with the picture ...
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We estimate the high energy neutrino flux from the giant flare of SGR 180620 on December 27, 2004, which irradiated Earth with a gamma-ray flux ∼ 10 times larger than the most luminous gamma-ray bursts (GRBs) ever detected. The Antarctic Cherenkov neutrino detector AMANDA was on-line during the flare, and may either have detected high energy neutrinos for the first time from a cosmic point sour...
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On December 27, 2004, a giant flare from SGR 1806−20 was detected on earth. Its thermal spectrum and temperature suggest that the flare resulted from an energy release of about 10 erg/sec close to the surface of a neutron star in the form of radiation and/or pairs. This plasma expanded under its own pressure producing a fireball and the observed gamma-rays escaped once the fireball became optic...
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We present one possible mechanism for the giant flares of the Soft GammaRay Repeaters (SGRs) within the framework of magnetar, i.e., superstrongly magnetized neutron star model, motivated by the positive period increase associated with the August 27 event from SGR 1900+14. We assume that the global reconfiguration of the internal magnetic field suddenly occurs. Then, the shape of the star is de...
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The giant flare observed on Dec. 27 2004 from SGR 1806–20 has revived the idea that a fraction of short (<2 s) Gamma Ray Bursts (GRB) is due to giant flares from Soft Gamma Ray Repeaters located in nearby galaxies. One of the distinguishing characteristics of these events is the thermal (black body) spectrum with temperatures ranging from ∼50 to ∼180 keV, with the highest temperature observed f...
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ژورنال
عنوان ژورنال: Chinese Journal of Astronomy and Astrophysics
سال: 2006
ISSN: 1009-9271
DOI: 10.1088/1009-9271/6/s1/19