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Eriksen, K.A.; Hughes, J.P.; Badenes, C.; Fesen, R.; Ghavamian, P.; Moffett, D.; Plucinksy, P.P.; Rakowski, C.E.; Reynoso, E.M.; Slane, P. "Evidence for particle acceleration to the knee of the cosmic ray spectrum in Tycho's supernova remnant" (2011) Astrophysical Journal Letters. 728(2 PART II)
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Abstract:

Supernova remnants (SNRs) have long been assumed to be the source of cosmic rays (CRs) up to the "knee" of the CR spectrum at 1015 eV, accelerating particles to relativistic energies in their blast waves by the process of diffusive shock acceleration (DSA). Since CR nuclei do not radiate efficiently, their presence must be inferred indirectly. Previous theoretical calculations and X-ray observations show that CR acceleration significantly modifies the structure of the SNR and greatly amplifies the interstellar magnetic field. We present new, deep X-ray observations of the remnant of Tycho's supernova (SN 1572, henceforth Tycho), which reveal a previously unknown, strikingly ordered pattern of non-thermal high-emissivity stripes in the projected interior of the remnant, with spacing that corresponds to the gyroradii of 1014-1015 eV protons. Spectroscopy of the stripes shows the plasma to be highly turbulent on the (smaller) scale of the Larmor radii of TeV energy electrons. Models of the shock amplification of magnetic fields produce structure on the scale of the gyroradius of the highest energy CRs present, but they do not predict the highly ordered pattern we observe. We interpret the stripes as evidence for acceleration of particles to near the knee of the CR spectrum in regions of enhanced magnetic turbulence, while the observed highly ordered pattern of these features provides a new challenge to models of DSA. © 2011. The American Astronomical Society.

Registro:

Documento: Artículo
Título:Evidence for particle acceleration to the knee of the cosmic ray spectrum in Tycho's supernova remnant
Autor:Eriksen, K.A.; Hughes, J.P.; Badenes, C.; Fesen, R.; Ghavamian, P.; Moffett, D.; Plucinksy, P.P.; Rakowski, C.E.; Reynoso, E.M.; Slane, P.
Filiación:Department of Physics and Astronomy, Rutgers, State University of New Jersey, Piscataway, NJ 08854, United States
School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv 69978, Israel
Benoziyo Center for Astrophysics, Weizmann Institute of Science, Rehovot 76100, Israel
Department of Physics and Astronomy, Dartmouth College, Hanover, NH 03755, United States
Space Telescope Science Institute, Baltimore, MD 21218, United States
Department of Physics, Furman University, Greenville, SC 29613, United States
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, United States
Space Science Division, Naval Research Laboratory, Washington, DC 20375, United States
Instituto de Astronomiá y Fiśica del Espacio, Buenos Aires, Argentina
Faculty of Exact and Natural Sciences, University of Buenos Aires, Argentina
Palabras clave:Acceleration of particles; Cosmic rays; ISM: individual objects (SN 1572, Tycho); ISM: supernova remnants
Año:2011
Volumen:728
Número:2 PART II
DOI: http://dx.doi.org/10.1088/2041-8205/728/2/L28
Título revista:Astrophysical Journal Letters
Título revista abreviado:Astrophys. J. Lett.
ISSN:20418205
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20418205_v728_n2PARTII_p_Eriksen

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Citas:

---------- APA ----------
Eriksen, K.A., Hughes, J.P., Badenes, C., Fesen, R., Ghavamian, P., Moffett, D., Plucinksy, P.P.,..., Slane, P. (2011) . Evidence for particle acceleration to the knee of the cosmic ray spectrum in Tycho's supernova remnant. Astrophysical Journal Letters, 728(2 PART II).
http://dx.doi.org/10.1088/2041-8205/728/2/L28
---------- CHICAGO ----------
Eriksen, K.A., Hughes, J.P., Badenes, C., Fesen, R., Ghavamian, P., Moffett, D., et al. "Evidence for particle acceleration to the knee of the cosmic ray spectrum in Tycho's supernova remnant" . Astrophysical Journal Letters 728, no. 2 PART II (2011).
http://dx.doi.org/10.1088/2041-8205/728/2/L28
---------- MLA ----------
Eriksen, K.A., Hughes, J.P., Badenes, C., Fesen, R., Ghavamian, P., Moffett, D., et al. "Evidence for particle acceleration to the knee of the cosmic ray spectrum in Tycho's supernova remnant" . Astrophysical Journal Letters, vol. 728, no. 2 PART II, 2011.
http://dx.doi.org/10.1088/2041-8205/728/2/L28
---------- VANCOUVER ----------
Eriksen, K.A., Hughes, J.P., Badenes, C., Fesen, R., Ghavamian, P., Moffett, D., et al. Evidence for particle acceleration to the knee of the cosmic ray spectrum in Tycho's supernova remnant. Astrophys. J. Lett. 2011;728(2 PART II).
http://dx.doi.org/10.1088/2041-8205/728/2/L28