Zobrazeno 1 - 10
of 237
pro vyhledávání: '"Chan, J. H."'
Publikováno v:
A&A 668, A77 (2022)
We report periodic oscillations in the 15-year long optical light curve of the gravitationally lensed quasar QJ0158-4325. The signal is enhanced during a high magnification microlensing event undergone by the fainter lensed image of the quasar, betwe
Externí odkaz:
http://arxiv.org/abs/2207.00598
Autor:
Savary, E., Rojas, K., Maus, M., Clément, B., Courbin, F., Gavazzi, R., Chan, J. H. H., Lemon, C., Vernardos, G., Cañameras, R., Schuldt, S., Suyu, S. H., Cuillandre, J. -C., Fabbro, S., Gwyn, S., Hudson, M. J., Kilbinger, M., Scott, D., Stone, C.
Publikováno v:
A&A 666, A1 (2022)
We present a search for galaxy-scale strong gravitational lenses in the initial 2 500 square degrees of the Canada-France Imaging Survey (CFIS). We designed a convolutional neural network (CNN) committee that we applied to a selection of 2 344 002 ex
Externí odkaz:
http://arxiv.org/abs/2110.11972
Autor:
Chan, J. H. H., Lemon, C., Courbin, F., Gavazzi, R., Clément, B., Millon, M., Paic, E., Rojas, K., Savary, E., Vernardos, G., Cuillandre, J. -C., Fabbro, S., Gwyn, S., Hudson, M. J., Kilbinger, M., McConnachie, A.
Publikováno v:
A&A 659, A140 (2022)
We report the discovery of five new doubly-imaged lensed quasars from the first 2500 square degrees of the ongoing Canada-France Imaging Survey (CFIS), which is a component of the Ultraviolet Near Infrared Optical Northern Survey (UNIONS), selected f
Externí odkaz:
http://arxiv.org/abs/2110.09535
Publikováno v:
A&A 659, A21 (2022)
Gravitational microlensing is a powerful tool to probe the inner structure of strongly lensed quasars and to constrain parameters of the stellar mass function of lens galaxies. This is done by analysing microlensing light curves between the multiple
Externí odkaz:
http://arxiv.org/abs/2110.05500
Autor:
Rojas, K., Savary, E., Clément, B., Maus, M., Courbin, F., Lemon, C., Chan, J. H. H., Vernardos, G., Joseph, R., Cañameras, R., Galan, A.
Publikováno v:
A&A 668, A73 (2022)
We performed a search for strong lens galaxy-scale systems in the first data release of the Dark Energy Survey (DES), from a color-selected parent sample of 18~745~029 Luminous Red Galaxies (LRGs). Our search was based on a Convolutional Neural Netwo
Externí odkaz:
http://arxiv.org/abs/2109.00014
Autor:
Huber, S., Suyu, S. H., Ghoshdastidar, D., Taubenberger, S., Bonvin, V., Chan, J. H. H., Kromer, M., Noebauer, U. M., Sim, S. A., Leal-Taixé, L.
Publikováno v:
A&A 658, A157 (2022)
The Hubble constant ($H_0$) is one of the fundamental parameters in cosmology, but there is a heated debate around the $>$4$\sigma$ tension between the local Cepheid distance ladder and the early Universe measurements. Strongly lensed Type Ia superno
Externí odkaz:
http://arxiv.org/abs/2108.02789
Autor:
Bayer, J., Huber, S., Vogl, C., Suyu, S. H., Taubenberger, S., Sluse, D., Chan, J. H. H., Kerzendorf, W. E.
Publikováno v:
A&A 653, A29 (2021)
We investigate strongly gravitationally lensed type II supernovae (LSNe II) for time-delay cosmography incorporating microlensing effects, which expands on previous microlensing studies of type Ia supernovae (SNe Ia). We use the radiative-transfer co
Externí odkaz:
http://arxiv.org/abs/2101.06229
Autor:
Huber, S., Suyu, S. H., Noebauer, U. M., Chan, J. H. H., Kromer, M., Sim, S. A., Sluse, D., Taubenberger, S.
Publikováno v:
A&A 646, A110 (2021)
To use strongly lensed Type Ia supernovae (LSNe Ia) for cosmology, a time-delay measurement between the multiple supernova (SN) images is necessary. The sharp rise and decline of SN Ia light curves make them promising for measuring time delays, but m
Externí odkaz:
http://arxiv.org/abs/2008.10393
Publikováno v:
A&A 647, A115 (2021)
Time-delay cosmography in strongly lensed quasars offer an independent way of measuring the Hubble constant, $H_0$. However, it has been proposed that the combination of microlensing and source-size effects, also known as microlensing time delay can
Externí odkaz:
http://arxiv.org/abs/2007.14416
Autor:
Millon, M., Courbin, F., Bonvin, V., Buckley-Geer, E., Fassnacht, C. D., Frieman, J., Marshall, P. J., Suyu, S. H., Treu, T., Anguita, T., Motta, V., Agnello, A., Chan, J. H. H., Chao, D. C. -Y, Chijani, M., Gilman, D., Gilmore, K., Lemon, C., Lucey, J. R., Melo, A., Paic, E., Rojas, K., Sluse, D., Williams, P. R., Hempel, A., Kim, S., Lachaume, R., Rabus, M.
Publikováno v:
A&A 642, A193 (2020)
We present six new time-delay measurements obtained from $R_c$-band monitoring data acquired at the Max Planck Institute for Astrophysics (MPIA) 2.2 m telescope at La Silla observatory between October 2016 and February 2020. The lensed quasars HE 004
Externí odkaz:
http://arxiv.org/abs/2006.10066