Zobrazeno 1 - 10
of 186
pro vyhledávání: '"van de Vyvere, A"'
In the past decade, the diversity of strong lens modeling methods has exploded, from being purely analytical to pixelated and non-parametric, or based on deep learning. We embrace this diversity by selecting different software packages and use them t
Externí odkaz:
http://arxiv.org/abs/2406.08484
Autor:
Gomer, Matthew R., Sluse, Dominique, Van de Vyvere, Lyne, Birrer, Simon, Shajib, Anowar J., Courbin, Frederic
Galaxy-scale gravitational lenses are often modeled with two-component mass profiles where one component represents the stellar mass and the second is an NFW profile representing the dark matter. Outside of the spherical case, the NFW profile is cost
Externí odkaz:
http://arxiv.org/abs/2310.03077
Autor:
Gomer, Matthew R., Ertl, Sebastian, Biggio, Luca, Wang, Han, Galan, Aymeric, Van de Vyvere, Lyne, Sluse, Dominique, Vernardos, Georgios, Suyu, Sherry H.
Strong gravitational lensing is a powerful tool to provide constraints on galaxy mass distributions and cosmological parameters, such as the Hubble constant, $H_0$. Nevertheless, inference of such parameters from images of lensing systems is not triv
Externí odkaz:
http://arxiv.org/abs/2307.10381
Publikováno v:
A&A 667, A86 (2022)
The largest source of systematic errors in the time-delay cosmography method likely arises from the lens model mass distribution, where an inaccurate choice of model could in principle bias the value of $H_0$. A Bayesian hierarchical framework has be
Externí odkaz:
http://arxiv.org/abs/2209.02076
Massive elliptical galaxies can display structures that deviate from a pure elliptical shape, such as a twist of the principal axis or variations in the axis ratio with galactocentric distance. Although satisfactory lens modeling is generally achieve
Externí odkaz:
http://arxiv.org/abs/2206.00022
Autor:
Van de Vyvere, Lyne, Gomer, Matthew R., Sluse, Dominique, Xu, Dandan, Birrer, Simon, Galan, Aymeric, Vernardos, Georgios
Publikováno v:
A&A 659, A127 (2022)
In the context of gravitational lensing, the density profile of lensing galaxies is often considered to be perfectly elliptical. Potential angular structures are generally ignored, except to explain flux ratios anomalies. Surprisingly, the impact of
Externí odkaz:
http://arxiv.org/abs/2112.03932
Autor:
Birrer, Simon, Shajib, Anowar J., Gilman, Daniel, Galan, Aymeric, Aalbers, Jelle, Millon, Martin, Morgan, Robert, Pagano, Giulia, Park, Ji Won, Teodori, Luca, Tessore, Nicolas, Ueland, Madison, Van de Vyvere, Lyne, Wagner-Carena, Sebastian, Wempe, Ewoud, Yang, Lilan, Ding, Xuheng, Schmidt, Thomas, Sluse, Dominique, Zhang, Ming, Amara, Adam
Publikováno v:
Journal of Open Source Software, 6(62), 3283 (2021)
lenstronomy is an Astropy-affiliated Python package for gravitational lensing simulations and analyses. lenstronomy was introduced by Birrer and Amara (2018) and is based on the linear basis set approach by Birrer et a. (2015). The user and developer
Externí odkaz:
http://arxiv.org/abs/2106.05976
Publikováno v:
A&A 644, A108 (2020)
Strong gravitational lensing is a powerful tool to measure cosmological parameters and to study galaxy evolution mechanisms. However, quantitative strong lensing studies often require mock observations. To capture the full complexity of galaxies, the
Externí odkaz:
http://arxiv.org/abs/2010.13650
Autor:
Birrer, S., Shajib, A. J., Galan, A., Millon, M., Treu, T., Agnello, A., Auger, M., Chen, G. C. -F., Christensen, L., Collett, T., Courbin, F., Fassnacht, C. D., Koopmans, L. V. E., Marshall, P. J., Park, J. -W., Rusu, C. E., Sluse, D., Spiniello, C., Suyu, S. H., Wagner-Carena, S., Wong, K. C., Barnabè, M., Bolton, A. S., Czoske, O., Ding, X., Frieman, J. A., Van de Vyvere, L.
Publikováno v:
A&A 643, A165 (2020)
The H0LiCOW collaboration inferred via gravitational lensing time delays a Hubble constant $H_0=73.3^{+1.7}_{-1.8}$ km s$^{-1}{\rm Mpc}^{-1}$, describing deflector mass density profiles by either a power-law or stars plus standard dark matter halos.
Externí odkaz:
http://arxiv.org/abs/2007.02941
Autor:
Ding, X., Treu, T., Birrer, S., Chen, G. C. -F., Coles, J., Denzel, P., Galan, M. Frigo A., Marshall, P. J., Millon, M., More, A., Shajib, A. J., Sluse, D., Tak, H., Xu, D., Auger, M. W., Bonvin, V., Chand, H., Courbin, F., Despali, G., Fassnacht, C. D., Gilman, D., Hilbert, S., Kumar, S. R., Lin, Y. -Y., Park, J. W., Saha, P., Vegetti, S., Van de Vyvere, L., Williams, L. L. R.
Publikováno v:
MNRAS, (2021), 503, 1096
In recent years, breakthroughs in methods and data have enabled gravitational time delays to emerge as a very powerful tool to measure the Hubble constant $H_0$. However, published state-of-the-art analyses require of order 1 year of expert investiga
Externí odkaz:
http://arxiv.org/abs/2006.08619