Abstract
Four highly variable, high redshift (x Z 0.9) BL Lac objects have been found to show a spatially resolved appearance on deep direct images. Because of the high redshift of the BL Lac objects, their non-stellar images are most likely due to an intervening galaxy with a much smaller redshift located nearly on the line of sight. These objects represent very good candidates for gravitationally (micro)lensed BL Lac objects. A number of properties of these objects and the BL Lac class in general are examined within the context of gravitational (micro)lensing.
This is a preview of subscription content, log in via an institution to check access.
Preview
Unable to display preview. Download preview PDF.
References
Antonucci, R. R. J., Ulvestad, J. S. 1985, Astrophys. J. 294, 158
Arp, H., Sargent, W.L.W., Willis, A.G., Oosterbaan, C.E.: 1979, Astrophys. J. 230, 68
Bââth, L.B.: 1983, in Highlights in Astronomy 6, 742
Bââth, L.B.: 1984, in VLBI and Compact Radio Sources, IAU Symposium 110, eds. R. Fanti, K. Kellermann, G. Setti (Dordrecht: Reidel), p. 127
Balonek, T.J.: 1986, in Continuum Emission in Active Galactic Nuclei, ed. M.L. Sitko (Tucson: KPNO), p. 161
Blandford, R.D., Rees, M.J.: 1978, in Pittsburgh Conference on BL Lac-Objects, ed. A.M. Wolfe (Univ. of Pittsburgh Press), p. 328
Burbidge, E.M., Barlow, T.A., Cohen, R.D., Junkkarinen, V.T., Womble, D.S.: 1989, Astrophysics & Space Science 157, 263
Cohen, R.D., Smith, H.E., Junkkarinen, V.T., Burbidge, E.M.: 1987, Astrophys. J. 318, 577
Grieger, B., Kayser, R., Refsdal, S.: 1988, Astron. Astrophys. 194, 54
Impey, C.D., Neugebauer, G.: 1988, Astron. J. 95, 307
Kayser, R.: 1988, Astron. Astrophys. Lett. 206, L8
Kayser, R., Weiss, A., Refsdal, S., Schneider, P.: 1989, Astron. Astrophys. 214, 4.
Miller, J.S., French, H.B., Hawley, S.A.: 1978, in Pittsburgh Conference on BL Lac Objects, ed. A.M. Wolfe (Univ. of Pittsburgh Press, p. 176
Mutel, R.L.: 1989, Proceedings of the Socorro Workshop on Parsec Scale Radio Jets, in press
Narayan, R., Schneider, P.: 1990, Mon. Not. R. Astron. Soc. 243, 192
Nottale, L.: 1986, Astron. Astrophys. 157, 383
Nottale, L.: 1988, in Dark Matter, eds. J. Audouze, J. Tran Thanh Van (Editions Frontiéres), p. 339
Liller, W.: 1976, IAU Circular No. 2939
Ostriker, J.P., Vietri, M.: 1985, Nature 318, 446
Ostriker, J. P., Vietri, M.: 1990, Nature 344, 45
Peterson, B.A., Jauncey, D.L., Wright, A.E., Condon, J.J.: 1976, Astrophys. J. Lett. 207, L5
Pollock, IT., Pica, A.J., Smith, A.G., Leacock, R.J., Edwards, P.L., Scott, R.L.: 1979, Astron. J. 84, 1651
Schneider, P., Weiss, A.: 1987, Astron. Astrophys. 171, 49
Stein, W.A., O'Dell, S.L., Strittmatter, P.A.: 1976, Ann. Rev. Astron. Astrophys. 14, 173
Stickel, M., Fried, J.W., Kühr, H.: 1988a, Astron. Astrophys. Lett. 198, L13
Stickel, M., Fried, J.W., Kühr, H.: 1988b, Astron. Astrophys. Lett. 206, L30
Stickel, M., Fried, J.W., Kühr, H.: 1989, Astron. Astrophys. Lett. 224, L27
Stickel, M., Padovani, P., Urry, C.M., Fried, J.W., Kühr, H.: 1990, Astrophys. J., submitted
Tytler, D., Boksenberg, A., Sargent, W.L.W., Young, P., Kunth, D.: 1987, Astrophys. J. Suppl. 64, 667
Usher, P.D.: 1975, Astrophys. J. Lett. 198, L57
Webb, J.R., Smith, A.G., Leacock, R.J., Fitzgibbons, G.L., Gombola, P.P., Shepherd, D.W.: 1988, Astron. J. 95, 374
Yanni, B., York, D.G., Gallagher, J.S: 1989, Astrophys. J. 338, 735
Zekl, H., Klare, G., Appenzeller, I.: 1981, Astron. Astrophys. 103, 342
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1991 Springer-Verlag
About this paper
Cite this paper
Stickel, M. (1991). Lensing of BL Lac objects. In: Duschl, W.J., Wagner, S.J., Camenzind, M. (eds) Variability of Active Galaxies. Lecture Notes in Physics, vol 377. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0030075
Download citation
DOI: https://doi.org/10.1007/BFb0030075
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-53860-8
Online ISBN: 978-3-540-46325-2
eBook Packages: Springer Book Archive