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The Quadruple Gravitational Lens PG 1115+080: Time Delays and Models
Open accessAbstract
Optical photometry is presented for the quadruple gravitational lens PG 1115+080. A preliminary reduction of data taken from 1995 November to 1996 June gives component C leading component B by 23.7 ± 3.4 days and components A1 and A2 by 9.4 days. A range of models has been fitted to the image positions, none of which gives an adequate fit. The best-fitting and most physically plausible of these, taking the lensing galaxy and the associated group of galaxies to be singular isothermal spheres, gives a Hubble constant of 42 km s -1 Mpc -1 for Ω = 1, with an observational uncertainty of 14%, as computed from the B - C time delay measurement. Taking the lensing galaxy to have an approximately E5 isothermal mass distribution yields H 0 = 64 km s -1 Mpc -1 , while taking the galaxy to be a point mass gives H 0 = 84 km s -1 Mpc -1 . The former gives a particularly bad fit to the position of the lensing galaxy, while the latter is inconsistent with measurements of nearby galaxy rotation curves. Constraints on these and other possible models are expected to improve with planned Hubble Space Telescope observations.
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Cited by
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Wang, L., Caldwell, R. R., Ostriker, J. P., & Steinhardt, P. J. (2000) · The Astrophysical Journal · doi:10.1086/308331 · Cited by 451
Birrer (2020) · doi:10.1051/0004-6361/202038861 · Cited by 396
Birrer, S., Treu, T., Rusu, C. E., Bonvin, V, Fassnacht, C. D., Chan, J. H. H., Agnello, A., Shajib, A. J., Chen, G. C.-F., Auger, M., et al. (2019) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stz200 · Cited by 365
H0LiCOW – I. H0 Lenses in COSMOGRAIL's Wellspring: program overview
Suyu, S. H., Bonvin, V., Courbin, F., Fassnacht, C. D., Rusu, C. E., Sluse, D., Treu, T., Wong, K. C., Auger, M. W., Ding, X., et al. (2017) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stx483 · Cited by 346
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Metadata
- Authors
- Schechter, P. L., Bailyn, C. D., Barr, R., Barvainis, R., Becker, C. M., Bernstein, G. M., Blakeslee, J. P., Bus, S. J., Dressler, A., Falco, E. E., Fesen, R. A., Fischer, P., Gebhardt, K., Harmer, D., Hewitt, J. N., Hjorth, J., Hurt, T., Jaunsen, A. O., Mateo, M., Mehlert, D., Richstone, D. O., Sparke, L. S., Thorstensen, J. R., Tonry, J. L., Wegner, G., Willmarth, D. W., & Worthey, G.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1997-02-01
- Volume
- 475
- Issue
- 2
- Pages
- L85-L88
- ISSN
- 0004-637X (ISSN-L)
- OpenAlex
- W2154082053
- Cited by
- 244
- References
- 0
- FWCI
- 20.73
- Type
- journal article
- Language
- en
- Open access
- bronze
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- The paper
- Schechter, P. L., Bailyn, C. D., Barr, R., Barvainis, R., Becker, C. M., Bernstein, G. M., Blakeslee, J. P., Bus, S. J., Dressler, A., Falco, E. E., Fesen, R. A., Fischer, P., Gebhardt, K., Harmer, D., Hewitt, J. N., Hjorth, J., Hurt, T., Jaunsen, A. O., Mateo, M., . . . Worthey, G. (1997). The Quadruple Gravitational Lens PG 1115+080: Time Delays and Models. The Astrophysical Journal. https://doi.org/10.1086/310478
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