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A VLA/Merlin/VLBA For Intermediate Scale Lenses and the Discovery of a New Lens System?

Published online by Cambridge University Press:  25 May 2016

P. Augusto ,
P.N. Wilkinson  and
I.W.A. Browne
P. Augusto
Affiliation:
Nuffield Radio Astronomy Laboratories, Univ. of Manchester Jodrell Bank, Macclesfield, Cheshire, SK11 9DL, U.K.
P.N. Wilkinson
Affiliation:
Nuffield Radio Astronomy Laboratories, Univ. of Manchester Jodrell Bank, Macclesfield, Cheshire, SK11 9DL, U.K.
I.W.A. Browne
Affiliation:
Nuffield Radio Astronomy Laboratories, Univ. of Manchester Jodrell Bank, Macclesfield, Cheshire, SK11 9DL, U.K.

Extract

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We are searching for small lens systems (50-250 mas or 108–109M⊙) in a sample of ∼ 1800 flat spectrum radio sources. This is the first time a systematic search has been made “between” the VLA and VLBI resolutions. Finding any would indicate the existence of other than the “conventional” spiral/elliptical lenses (only ∼ 0.01% chance - Turner et al. (1984)). For example, faint galaxies are numerous (∼ 106 gal/deg2 - Lilly (1993), Glazebrook et al. 1995), compact (HST Medium Deep Survey (MDS) - Griffiths et al. 1994) and ideally placed for lensing (< z >∼ 0.6 - MDS, Smail et al. (1994); c.f. Turner et al. 1984). Early-type dwarf galaxies (dE,N and cE), if extant at intermediate-z as favored by MDS are also obvious lens candidates. If no lenses are found, a limit 400 times better than the current one (Surdej et al. 1993), ΩL < 0.001, will be placed on the cosmological density of compact objects (e.g. black holes) for the above mass range.

Type
Chapter 11: Lens Surveys
Information
Symposium - International Astronomical Union , Volume 173: Astrophysical Applications of Gravitational Lensing , 1996 , pp. 399 - 400
Copyright
Copyright © Kluwer 1996 

References

Glazebrook, K., Ellis, R., Colless, M.M., Broadhurst, T.J., Allington-Smith, J., & Tanvir, N., 1995, MNRAS, 273, 157 CrossRefGoogle Scholar
Griffiths, R.E., Ratnatunga, K.U., Neuschaefer, L.W., Casertano, S., et al., 1994, ApJ, 437, 67 Google Scholar
Lilly, S.J., 1993, ApJ, 411, 501 Google Scholar
Patnaik, A.R., Browne, I.W.A., Wilkinson, P.N., & Wrobel, J.M., 1992, MNRAS, 254, 655 CrossRefGoogle Scholar
Smail, I., Ellis, R.S., & Fitchett, M.J., 1994, MNRAS, 270, 245 Google Scholar
Surdej, J., Claeskens, J.F., Crampton, D., Fillipenko, A.V., et al., 1993, AJ, 105, 2064 Google Scholar
Turner, E.L., Ostriker, J.P., Gott, J.R., 1984, ApJ, 284, 1 CrossRefGoogle Scholar