Navegar

Colección

Datos Estadísticas

Artículo

Torres, D.F.; Cillis, A.; Lacki, B.; Rephaeli, Y. "Building up the spectrum of cosmic rays in star-forming regions" (2012) Monthly Notices of the Royal Astronomical Society. 423(1):822-830
Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

The common approach to compute the cosmic ray distribution in a starburst galaxy or region is equivalent to assuming that at any point within that environment, there is an accelerator inputting cosmic rays at a reduced rate. This rate should be compatible with the overall volume-average injection, given by the total number of accelerators that were active during the starburst age. These assumptions seem reasonable, especially under the supposition of a homogeneous and isotropic distribution of accelerators. However, in this approach the temporal evolution of the superposed spectrum is not explicitly derived; rather, it is essentially assumed ab initio. Here, we test the validity of this approach by following the temporal evolution and spatial distribution of the superposed cosmic ray spectrum and compare our results with those from theoretical models that treat the starburst region as a single source. In the calorimetric limit (with no cosmic ray advection), homogeneity is reached (typically within 20 percent) across most of the starburst region. However, values of centre-to-edge intensity ratios can amount to a factor of several. Differences between the common homogeneous assumption for the cosmic ray distribution and our models are larger in the case of two-zone geometries, such as a central nucleus with a surrounding disc. We have also found that the decay of the cosmic ray density following the duration of the starburst process is slow, and even approximately 1Myr after the burst ends (for a gas density of 35cm -3) it may still be within an order of magnitude of its peak value. Based on our simulations, it seems that the detection of a relatively hard spectrum up to the highest gamma-ray energies from nearby starburst galaxies favours a relatively small diffusion coefficient (i.e. long diffusion time) in the region where most of the emission originates. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.

Registro:

Documento: Artículo
Título:Building up the spectrum of cosmic rays in star-forming regions
Autor:Torres, D.F.; Cillis, A.; Lacki, B.; Rephaeli, Y.
Filiación:Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
Institut de Ciències de l'Espai (IEEC-CSIC), Campus UAB, Torre C5, 2a planta, 08193 Barcelona, Spain
Instituto de Astronomía y Física del Espacio (CONICET-UBA), CC67, Suc. 28, 1428 Buenos Aires, Argentina
Institute for Advanced Study, Einstein Drive, Princeton, NJ 08540, United States
Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, 69978, Israel
Center for Astrophysics and Space Sciences, University of California, San Diego, La Jolla, CA 92093, United States
Palabras clave:Cosmic rays; Galaxies: starburst; Gamma-rays: galaxies; ISM: supernova remnants; Radiation mechanisms: non-thermal
Año:2012
Volumen:423
Número:1
Página de inicio:822
Página de fin:830
DOI: http://dx.doi.org/10.1111/j.1365-2966.2012.20920.x
Título revista:Monthly Notices of the Royal Astronomical Society
Título revista abreviado:Mon. Not. R. Astron. Soc.
ISSN:00358711
CODEN:MNRAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v423_n1_p822_Torres

Referencias:

  • Abdo, A., (2010) ApJ, 709, pp. L152
  • Acciari, V.A., (2009) Nat, 462, p. 770
  • Acero, F., (2009) Sci, 326, p. 1080
  • Actis, M., (2011) Exp. Astron., 32, p. 193
  • Aharonian, F.A., Atoyan, A.M., (1996) A&A, 309, p. 91
  • Atoyan, A.M., Aharonian, F.A., Völk, H.J., (1995) Phys. Rev. D, 52, p. 3265
  • Bell, A.R., (1978) MNRAS, 182, p. 443
  • Bell, A.R., Schure, K.M., Reville, B., (2011) MNRAS, 418, p. 1208
  • Berezhko, E.G., Ellison, D.C., (1999) ApJ, 526, p. 385
  • Blom, J.J., Paglione, T.A., Carramiana, A., (1999) ApJ, 516, p. 744
  • Bradford, C.M., Nikola, T., Stacey, G.J., Bolatto, A.D., Jackson, J.M., Savage, M.L., Davidson, J.A., Higdon, S.J., (2003) ApJ, 586, p. 891
  • de Cea, D.P.E., Torres, D.F., Rodriguez-Marrero, A.Y., (2009) ApJ, 698, p. 1054
  • Domingo-Santamaría, E., Torres, D.F., (2005) A&A, 444, p. 403
  • Ellison, D.C., Berezhko, E.G., Baring, M.G., (2000) ApJ, 540, p. 292
  • Ellison, D.C., Decourchelle, A., Ballet, J., (2004) A&A, 413, p. 189
  • Engelbracht, C.W., Rieke, M.J., Rieke, G.H., Kelly, D.M., Achterman, J.M., (1998) ApJ, 505, p. 639
  • Fujita, Y., Ohira, Y., Tanaka, S.J., Takahara, F., (2009) ApJ, 707, pp. L179
  • Fujita, Y., Ohira, Y., Takahara, F., (2010) ApJ, 712, pp. L153
  • Gabici, S., (2010) Cosmic Rays for Particle and Astroparticle Physics, , ICATPP Conf., preprint (arXiv:1011.2029)
  • Gaisser, T.K., (1990) Cosmic Rays and Particle Physics, , Cambridge Univ. Press, Cambridge
  • Ginzburg, V.L., Syearovatskii, S.I., (1964) The Origin of Cosmic Rays, , Pergamon Press, Oxford
  • Harrison, A., Henkel, C., Russel, A., (1999) MNRAS, 303, p. 157
  • Houghton, S., Whiteoak, J.B., Koribalski, B., Booth, R., Wiklind, T., Wielebinski, R., (1997) A&A, 325, p. 923
  • Lacki, B.C., Thompson, T.A., Quataert, E., (2010) ApJ, 717, p. 1
  • Lacki, B.C., Thompson, T.A., Quataert, E., Loeb, A., Waxman, E., (2011) ApJ, 734, p. 107
  • Loeb, A., Waxman, E., (2006) J. Cosmol. Astropart. Phys., 5, p. 3
  • Makiya, R., Totani, T., Kobayashi, M.A.R., (2011) ApJ, 728, p. 158
  • Melo, V.P., Perez-Garcia, A.M., Acosta-Pulido, J.A., Muñoz-Tuñon, C., Rodriguez Espinosa, J.M., (2002) ApJ, 574, p. 709
  • Ormes, J.F., Ozel, M.E., Morris, D.J., (1988) ApJ, 334, p. 722
  • Paglione, T.A.D., Marscher, A.P., Jackson, J.M., Bertsch, D.L., (1996) ApJ, 460, p. 295
  • Papadopoulos, P.P., (2010) ApJ, 720, p. 226
  • Persic, M., Rephaeli, Y., Arieli, Y., (2008) A&A, 486, p. 143
  • Ptuskin, V.S., Zirakashvili, V.N., (2005) A&A, 429, p. 755
  • Rephaeli, Y., Arieli, A., Persic, M., (2010) MNRAS, 401, p. 473
  • Socrates, A., Davis, S.W., Ramirez-Ruiz, E., (2008) ApJ, 687, p. 202
  • Sorai, K., Nakai, N., Nishiyama, K., Hasegawa, T., (2000) PASJ, 52, p. 785
  • Stecker, F.W., (1971) Cosmic Gamma Rays, , Mono, Baltimore
  • Strong, A., Moskalenko, I., (1998) ApJ, 509, p. 212
  • Thompson, T.A., Quataert, E., Waxman, E., (2007) ApJ, 654, p. 219
  • Torres, D.F., (2004) ApJ, 617, p. 966
  • Torres, D.F., Rodriguez-Marrero, A., de Cea del Pozo, E., (2010) MNRAS, 408, p. 1257
  • Ulvestad, J.S., (2000) ApJ, 120, p. 278
  • Ulvestad, J.S., Antonucci, R.R.J., (1997) ApJ, 488, p. 621
  • Williams, P.K.G., Bower, G.C., (2010) ApJ, 710, p. 1462

Citas:

---------- APA ----------
Torres, D.F., Cillis, A., Lacki, B. & Rephaeli, Y. (2012) . Building up the spectrum of cosmic rays in star-forming regions. Monthly Notices of the Royal Astronomical Society, 423(1), 822-830.
http://dx.doi.org/10.1111/j.1365-2966.2012.20920.x
---------- CHICAGO ----------
Torres, D.F., Cillis, A., Lacki, B., Rephaeli, Y. "Building up the spectrum of cosmic rays in star-forming regions" . Monthly Notices of the Royal Astronomical Society 423, no. 1 (2012) : 822-830.
http://dx.doi.org/10.1111/j.1365-2966.2012.20920.x
---------- MLA ----------
Torres, D.F., Cillis, A., Lacki, B., Rephaeli, Y. "Building up the spectrum of cosmic rays in star-forming regions" . Monthly Notices of the Royal Astronomical Society, vol. 423, no. 1, 2012, pp. 822-830.
http://dx.doi.org/10.1111/j.1365-2966.2012.20920.x
---------- VANCOUVER ----------
Torres, D.F., Cillis, A., Lacki, B., Rephaeli, Y. Building up the spectrum of cosmic rays in star-forming regions. Mon. Not. R. Astron. Soc. 2012;423(1):822-830.
http://dx.doi.org/10.1111/j.1365-2966.2012.20920.x