Navegar

Colección

Datos Estadísticas

Artículo

Torres, D.F.; Romero, G.E.; Eiroa, E.F.; Wambsganss, J.; Pessah, M.E. "Gravitational microlensing of γ-ray blazars" (2003) Monthly Notices of the Royal Astronomical Society. 339(2):335-352
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:

We present a detailed study of the effects of gravitational microlensing on compact and distant γ-ray blazars. These objects have γ-ray-emitting regions that are small enough to be affected by microlensing effects produced by stars lying in intermediate galaxies. We compute the gravitational magnification taking into account effects of the lensing and show that, whereas the innermost γ-ray spheres can be significantly magnified, there is little magnification either for very high γ-ray energies or for lower (radio) frequencies (because these wavelengths are emitted from larger regions). We analyse the temporal evolution of the gamma-ray magnification for sources moving in a caustic pattern field, where the combined effects of thousands of stars are taken into account using a numerical technique. We propose that some of the unidentified γ-ray sources (particularly some of those lying at high galactic latitude with gamma-ray statistical properties that are very similar to detected γ-ray blazars) are indeed the result of gravitational lensing magnification of background undetected active galactic nuclei (AGN). This is partly supported from a statistical point of view: we show herein as well, using the latest information from the third EGRET catalogue, that high-latitude γ-ray sources have similar averaged properties to already detected γ-ray AGN. Some differences between both samples, regarding the mean flux level, could also be understood within the lensing model. With an adequate selection of lensing parameters, it is possible to explain a variety of γ-ray light curves with different time-scales, including non-variable sources. The absence of strong radio counterparts could be naturally explained by differential magnification in the extended source formalism.

Registro:

Documento: Artículo
Título:Gravitational microlensing of γ-ray blazars
Autor:Torres, D.F.; Romero, G.E.; Eiroa, E.F.; Wambsganss, J.; Pessah, M.E.
Filiación:Lawrence Livermore Natl. Laboratory, 7000 East Ave, Livermore, CA 94550, United States
Physics Department, Princeton University, Princeton, NJ 08544, United States
Inst. Argentino de Radioastronomfa, CC 5, 1894 Villa Elisa, Buenos Aires, Argentina
Inst. Astronmia y Fis. del Espacio, CC 67, Suc. 28, 1428, Buenos Aires, Argentina
Universität Potsdam, Institut für Physik, Am Neuen Palais 10, 14469 Potsdam, Germany
Steward Observatory, University of Arizona, Tucson, AZ 85721, United States
Palabras clave:Galaxies: active; Gamma-rays: observations; Gamma-rays: theory; Gravitational lensing
Año:2003
Volumen:339
Número:2
Página de inicio:335
Página de fin:352
DOI: http://dx.doi.org/10.1046/j.1365-8711.2003.06219.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_v339_n2_p335_Torres

Referencias:

  • Aharonian, F.A., Konopelko, A.K., Völk, H.J., Quintana, H., (2001) AP, 15, p. 335
  • Benaglia, P., Romero, G.E., Stevens, I., Torres, D.F., (2001) A&A, 366, p. 605
  • Becker, P., Kafatos, M., (1995) ApJ, 453, p. 83
  • Blandford, R.D., Levinson, A., (1995) ApJ, 441, p. 79
  • Butt, Y.M., Torres, D.F., Combi, J.A., Dame, T., Romero, G.E., (2001) ApJ, 561, pp. L203
  • Camilo, F., (2001) ApJ, 557, pp. L51
  • Chang, K., Refsdal, S., (1984) A&A, 132, p. 168
  • Combi, J.A., Romero, G.F., (1995) A&A, 303, p. 873
  • Combi, J.A., Romero, G.E., (1998) A&AS, 128, p. 423
  • Combi, J.A., Romero, G.E., Benaglia, P., (1998) A&A, 333, pp. L91
  • Combi, J.A., Romero, G.E., Benaglia, P., Jonas, J., (2001) A&A, 366, p. 1047
  • Corrigan, R.T., (1991) AJ, 102, p. 34
  • D'Amico, N., (2001) ApJ, 552, pp. L45
  • Deguchi, S., Watson, W.D., (1987) Phys. Rev. Lett., 59, p. 2814
  • Esposito, J.A., Hunter, S.D., Kanbach, G., Sreekumar, P., (1996) ApJ, 461, p. 820
  • Garnavich, P.M., Loeb, A., Stanek, K.Z., (2000) ApJ, 544, pp. L11
  • Gehrels, N., Michelson, P., (1999) AP, 11, p. 277
  • Gehrels, N., Macomb, D.J., Bertsch, D.L., Thompson, D.J., Hartman, R.C., (2000) Nat, 404, p. 363
  • Grenier, I., (2000) A&A, 364, pp. L93
  • Hartman, R.C., (1999) ApJS, 123, p. 79
  • Jauncey, D.L., (1991) Nat, 352, p. 132
  • Kaspi, V.M., Lackey, J.R., Mattox, J., Manchester, R.N., Bailes, M., Pace, R., (2000) ApJ, 528, p. 445
  • Kayser, R., Refsdal, S., Stabell, R., (1986) A&A, 166, p. 36
  • Kaufman Bernadó, M.M., Romero, G.E., Mirabel, I.F., (2002) A&A, 385, pp. L10
  • Koopmans, L.V.E., De Bruyn, A.G., (2000) A&A, 358, p. 793
  • Koopmans, L.V.E., Wambsganss, J., (2001) MNRAS, 325, p. 1317
  • Lovell, J.E.J., (1996) ApJ, 472, pp. L5
  • Mao, S., Loeb, A., (2001) ApJ, 547, pp. L97
  • Mattox, J.R., Schachter, J., Molnar, L., Hartman, R.C., Patnaik, A.R., (1997) ApJ, 481, p. 95
  • Mattox, J.R., Hartman, R.C., Reimer, O., (2001) ApJS, 135, p. 155
  • Mukherjee, R., (2001) High Energy Gamma-Ray Astronomy, p. 324. , Aharonian F.A., Völk H.J., eds. AIP, Melville
  • Oshima, T., Mitsuda, K., Ota, N., Yonehara, A., Hattori, M., Mihara, T., Sekimoto, Y., (2001) ApJ, 551, p. 929
  • Ostriker, J., Vietri, M., (1985) Nat, 318, p. 446
  • Özel, M.E., Thompson, D.J., (1996) ApJ, 463, p. 105
  • Paczyński, B., (1986) ApJ, 304, p. 1
  • Paczyński, B., (1996) ARA&A, 34, p. 419
  • Paredes, J.M., Marti, J., Ribo, M., Massi, M., (2000) Sci, 288, p. 2340
  • Pramesh Rao, A., Subrahmanyan, R., (1988) MNRAS, 231, p. 229
  • Punsly, B., (1998) ApJ, 498, p. 640
  • Punsly, B., (1998) ApJ, 498, p. 660
  • Punsly, B., Romero, G.E., Torres, D.F., Combi, J.A., (2000) A&A, 364, p. 556
  • Reimer, O., (2001) The Nature of Galactic Unidentified Gamma-ray Sources, p. 17. , Carramiana O., Reimer O., Thomson D., eds. Kluwer, Dordrecht
  • Reimer, O., Thompson, D.J., (2001) Proc. 27th Int. Cosmic Ray Conf. Copernicus Gessellschaft, , Lindau, in press (astro-ph/0108348)
  • Romero, G.E., (2001) The Nature of Galactic Unidentified Gamma-ray Sources, p. 65. , Carramiana O., Reimer O., Thomson D., eds. Kluwer, Dordrecht, astro-ph/0012243
  • Romero, G.E., Combi, J.A., Colomb, F.R., (1994) A&A, 288, p. 731
  • Romero, G.E., Surpi, G., Vucetich, H., (1995) A&A, 301, p. 641
  • Romero, G.E., Benaglia, P., Torres, D.F., (1999) A&A, 348, p. 868
  • Romero, G.E., Chajet, L., Abraham, Z., Fan, J.H., (2000) A&A, 360, p. 57
  • Romero, G.E., Kaufman Bernado, M.M., Combi, J.A., Torres, D.F., (2001) A&A, 376, p. 599
  • Schlickeiser, R., (1996) A&AS, 120, p. 481
  • Schneider, P., Weiss, A., (1987) A&A, 171, p. 49
  • Schneider, D.P., Turner, E.L., Gunn, J.E., Hewitt, J.N., Schmidt, M., Lawrence, C.R., (1988) AJ, 95, p. 1619
  • Stumer, S.J., Dermer, C.D., Mattox, J.R., (1996) A&AS, 120, p. 445
  • Swanenburg, B.N., (1978) Nat, 275, p. 298
  • Thompson, D.J., (2001) High Energy Gamma-Ray Astronomy, p. 103. , Aharonian F.A., Völk H.J., eds. AIP, Melville (astro-ph/0101039)
  • Thompson, D.J., (1999) ApJ, 516, p. 297
  • Tompkins, W., (1999), PhD thesis, Stanford Univ; Torres, D.F., Romero, G.E., Combi, J., Benaglia, P., Andernach, H., Punsly, B., (2001) A&A, 370, p. 468
  • Torres, D.F., Combi, J.A., Romero, G.E., Benaglia, P., (2001) Proc. Int. Workshop on the Nature of Galactic Unidentified Gamma-Ray Sources, p. 97. , Carramiana O., Reimer O., Thomson D., eds. Kluwer, Dordrecht, (astro-ph/0012160)
  • Torres, D.F., Pessah, M.E., Romero, G.E., (2001) Astron. Nachr., 322, p. 223
  • Torres, D.F., Butt, Y.M., Camilo, F., (2001) ApJ, 569, p. 600
  • Torres, D.F., Romero, G.E., Eiroa, E.F., (2002) ApJ, 569, p. 600
  • Torres, D.F., Romero, G.E., Dame, T., Combi, J., Butt, Y.M., (2002) Phys. Rep., , submitted (astro-ph/0209565)
  • Totani, T., Kitayama, T., (2000) ApJ, 545, p. 572
  • Véron-Cetty, M.-P., Véron, P., (2001) A&A, 374, p. 92
  • Von Montigny, C., (1995) ApJ, 440, p. 525
  • Wambsganss, J., (1999) J. Comp. Appl. Math., 109, p. 353
  • Wambsganss, J., (2001) ASP Conf. Ser., 237, p. 185. , Brainerd T., Kochanek C.S., eds, Gravitational Lensing: Recent Progress and Future Go. Astron. Soc. Pac., San Francisco
  • Wambsganss, J., Paczynéski, B., (1991) ApJ, 102, p. 864
  • Wambsganss, J., Paczynéski, B., (1994) ApJ, 108, p. 1156
  • Wiklind, T., Combes, F., (1996) Nat, 379, p. 139
  • Williams, L.L.R., Wijers, R.A.M.J., (1997) MNRAS, 286, pp. L11
  • Witt, H.J., Mao, S., (1994) ApJ, 429, p. 66
  • Wozniak, P.R., (2000) ApJ, 540, pp. L65
  • Wyithe, S., Turner, E.L., (2002) ApJ, 567, p. 18
  • Zhang, L., Zhang, Y.J., Cheng, K.S., (2000) A&A, 357, p. 957

Citas:

---------- APA ----------
Torres, D.F., Romero, G.E., Eiroa, E.F., Wambsganss, J. & Pessah, M.E. (2003) . Gravitational microlensing of γ-ray blazars. Monthly Notices of the Royal Astronomical Society, 339(2), 335-352.
http://dx.doi.org/10.1046/j.1365-8711.2003.06219.x
---------- CHICAGO ----------
Torres, D.F., Romero, G.E., Eiroa, E.F., Wambsganss, J., Pessah, M.E. "Gravitational microlensing of γ-ray blazars" . Monthly Notices of the Royal Astronomical Society 339, no. 2 (2003) : 335-352.
http://dx.doi.org/10.1046/j.1365-8711.2003.06219.x
---------- MLA ----------
Torres, D.F., Romero, G.E., Eiroa, E.F., Wambsganss, J., Pessah, M.E. "Gravitational microlensing of γ-ray blazars" . Monthly Notices of the Royal Astronomical Society, vol. 339, no. 2, 2003, pp. 335-352.
http://dx.doi.org/10.1046/j.1365-8711.2003.06219.x
---------- VANCOUVER ----------
Torres, D.F., Romero, G.E., Eiroa, E.F., Wambsganss, J., Pessah, M.E. Gravitational microlensing of γ-ray blazars. Mon. Not. R. Astron. Soc. 2003;339(2):335-352.
http://dx.doi.org/10.1046/j.1365-8711.2003.06219.x