Zobrazeno 1 - 10
of 153
pro vyhledávání: '"Courbin, Frédéric"'
Autor:
Larison, Conor, Pierel, Justin D. R., Newman, Max J. B., Jha, Saurabh W., Gilman, Daniel, Hayes, Erin E., Agrawal, Aadya, Arendse, Nikki, Birrer, Simon, Bronikowski, Mateusz, Della Costa, John M., Coulter, David A., Courbin, Frédéric, Chakrabarti, Sukanya, Diego, Jose M., Dhawan, Suhail, Goobar, Ariel, Gall, Christa, Hjorth, Jens, Huang, Xiaosheng, Mao, Shude, Marques-Chaves, Rui, Mazzali, Paolo A., More, Anupreeta, Moustakas, Leonidas A., Pérez-Fournon, Ismael, Petrushevska, Tanja, Poidevin, Frédérick, Rest, Armin, Shajib, Anowar J., Shirley, Raphael, Sheu, William, Strolger, Louis-Gregory, Suyu, Sherry H., Treu, Tommaso, Zenati, Yossef
Strongly lensed supernovae (SNe) are a rare class of transient that can offer tight cosmological constraints that are complementary to methods from other astronomical events. We present a follow-up study of one recently-discovered strongly lensed SN,
Externí odkaz:
http://arxiv.org/abs/2409.17239
Autor:
Wong, Kenneth C., Dux, Frédéric, Shajib, Anowar J., Suyu, Sherry H., Millon, Martin, Mozumdar, Pritom, Wells, Patrick R., Agnello, Adriano, Birrer, Simon, Buckley-Geer, Elizabeth J., Courbin, Frédéric, Fassnacht, Christopher D., Frieman, Joshua, Galan, Aymeric, Lin, Huan, Marshall, Philip J., Poh, Jason, Schuldt, Stefan, Sluse, Dominique, Treu, Tommaso
Publikováno v:
A&A 689, A168 (2024)
Time-delay cosmography is a powerful technique to constrain cosmological parameters, particularly the Hubble constant ($H_{0}$). The TDCOSMO collaboration is performing an ongoing analysis of lensed quasars to constrain cosmology using this method. I
Externí odkaz:
http://arxiv.org/abs/2406.02683
Autor:
Maeder, Andre, Courbin, Frederic
Recent studies of wide binary stars based on Gaia DR3 suggest that the relative orbital velocities of objects with separations s > 3'000 astronomical units are statistically larger than the standard Newtonian predictions. Obviously there is no Dark M
Externí odkaz:
http://arxiv.org/abs/2406.01536
Publikováno v:
A&A 688, A6 (2024)
As ground-based all-sky astronomical surveys will gather millions of images in the coming years, a critical requirement emerges for the development of fast deconvolution algorithms capable of efficiently improving the spatial resolution of these imag
Externí odkaz:
http://arxiv.org/abs/2405.07842
Autor:
Schechter, Paul L., Sluse, Dominique, Zaborowski, Erik A., Drlica-Wagner, Alex, Lemon, Cameron, Courbin, Frederic, Hempel, Angela, Millon, Martin, Treu, Tommaso, Teixeira, Raul, Adamów, Monika, Bom, Clecio R., Carballo-Bello, Julio A., Ferguson, Peter S., Gruendl, Robert A., James, David J., Martinez-Vásquez, Clara E., Massana, Pol, Mau, Sidney, Mutlu-Pakdil, Burçin, Noël, Noëlia E. D., Pace, Andrew B., Sakowska, Joanna D., Stringfellow, Guy S., Tollerud, Erik J., Vivas, Kathy, Zenteno, Alfredo
A quadruply lensed source, J125856.3-031944, has been discovered using the DELVE survey and WISE W1 - W2 colors. Followup direct imaging carried out with the MPIA 2.2 m and the Baade 6.5 m telescopes is analyzed, as is spectroscopy from the 2.5 m Nor
Externí odkaz:
http://arxiv.org/abs/2404.14256
Autor:
Maeder, Andre, Courbin, Frederic
We study the path of light rays passing near a massive object, in the context of the scale invariant equation of the geodesics first obtained by Dirac (1973). Using the exterior Schwarzschild solution for the metric, we derive the complete equations
Externí odkaz:
http://arxiv.org/abs/2403.08379
Publikováno v:
The Astronomical Journal, Volume 168, Issue 2, id.55, 15 pp, 2024
We present STARRED, a Point Spread Function (PSF) reconstruction, two-channel deconvolution, and light curve extraction method designed for high-precision photometric measurements in imaging time series. An improved resolution of the data is targeted
Externí odkaz:
http://arxiv.org/abs/2402.08725
Autor:
Lemon, Cameron, Courbin, Frédéric, More, Anupreeta, Schechter, Paul, Cañameras, Raoul, Delchambre, Ludovic, Leung, Calvin, Shu, Yiping, Spiniello, Chiara, Hezaveh, Yashar, Klüter, Jonas, McMahon, Richard
Strong gravitational lenses provide unique laboratories for cosmological and astrophysical investigations, but they must first be discovered - a task that can be met with significant contamination by other astrophysical objects and asterisms. Here we
Externí odkaz:
http://arxiv.org/abs/2310.13466
Autor:
Dux, Frédéric, Lemon, Cameron, Courbin, Frédéric, Sluse, Dominique, Smette, Alain, Anguita, Timo, Neira, Favio
Publikováno v:
A&A 679, L4 (2023)
We report the discovery of PSJ2107-1611, a fold-configuration 4.3"-separation quadruply lensed quasar with a bright lensed arc. It was discovered using a convolutional neural network on Pan-STARRS gri images of pre-selected quasar candidates with mul
Externí odkaz:
http://arxiv.org/abs/2310.04494
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