The effect of magnetic fields on γ-ray bursts inferred from multi-wavelength observations of the burst of 23 January 1999

被引:151
作者
Galama, TJ
Briggs, MS
Wijers, RAMJ
Vreeswijk, PM
Rol, E
Band, D
van Paradijs, J
Kouveliotou, C
Preece, RD
Bremer, M
Smith, IA
Tilanus, RPJ
de Bruyn, AG
Strom, RG
Pooley, G
Castro-Tirado, AJ
Tanvir, N
Robinson, C
Hurley, K
Heise, J
Telting, J
Rutten, RGM
Packham, C
Swaters, R
Davies, JK
Fassia, A
Green, SF
Foster, MJ
Sagar, R
Pandey, AK
Nilakshi
Yadav, RKS
Ofek, EO
Leibowitz, E
Ibbetson, P
Rhoads, J
Falco, E
Petry, C
Impey, C
Geballe, TR
Bhattacharya, D
机构
[1] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands
[2] Ctr High Energy Astrophys, NL-1098 SJ Amsterdam, Netherlands
[3] Univ Alabama, Dept Phys, Huntsville, AL 35899 USA
[4] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA
[5] Univ Calif San Diego, CASS, La Jolla, CA 92093 USA
[6] NASA, MSFC, Huntsville, AL 35812 USA
[7] Univ Space Res Assoc, Huntsville, AL 35812 USA
[8] Inst Radio Astron Millimetr, F-38406 St Martin Dheres, France
[9] Rice Univ, Dept Space Phys & Astron, Houston, TX 77005 USA
[10] Joint Astron Ctr, Hilo, HI 96720 USA
[11] Netherlands Fdn Res Astron, NL-7990 AA Dwingeloo, Netherlands
[12] Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands
[13] Univ Cambridge, Cavendish Lab, Mullard Radio Astron Observ, Cambridge CB3 0HE, England
[14] Lab Astrofis Espacial & Fis Fundamental, INTA, E-28080 Madrid, Spain
[15] CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain
[16] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England
[17] Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England
[18] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
[19] Natl Sci Fdn, Berkeley, CA 94720 USA
[20] SRON, Space Res Lab, NL-3584 CA Utrecht, Netherlands
[21] Isaac Newton Grp, E-38780 Santa Cruz De La Palma, Islas Canarias, Spain
[22] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2BZ, England
[23] Univ Kent, Phys Lab, Sch Phys Sci, Unit Space Sci & Astrophys, Canterbury CT2 7NR, Kent, England
[24] Uttar Pradesh State Observ, Naini Tal 263129, India
[25] Tel Aviv Univ, Wise Observ, IL-69978 Tel Aviv, Israel
[26] Kitt Peak Natl Observ, Tucson, AZ 85726 USA
[27] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[28] Univ Arizona, Steward Observ, Tucson, AZ 85719 USA
[29] Univ Hawaii, Gemini Observ, Hilo, HI 96720 USA
[30] Raman Res Inst, Bangalore 560080, Karnataka, India
关键词
D O I
10.1038/18828
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Gamma-ray bursts (GRBs) are thought to arise when an extremely relativistic outflow of particles from a massive explosion (the nature of which is still unclear) Interacts with material surrounding the site of the explosion. observations of the evolving changes in emission at many wavelengths allow us to Investigate the origin of the photons, and so potentially determine the nature of the explosion. Here we report the results of gamma-ray, optical, Infrared, submillimetre, millimetre and radio observations of the burst GRB990123 and Its afterglow. Our Interpretation of the data Indicates that the initial and afterglow emissions are associated with three distinct regions In the fireball. The peak flux of the afterglow, one day after the burst, has a lower frequency than observed for other bursts; this explains tbe short-lived radio emission. We suggest that the differences between bursts reflect variations In the magnetic-field strength in the afterglow-emitting regions.
引用
收藏
页码:394 / 399
页数:6
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