Zobrazeno 1 - 10
of 183
pro vyhledávání: '"P. Lachaume"'
Nine lensed quasars and quasar pairs discovered through spatially-extended variability in Pan-STARRS
Autor:
Dux, Frédéric, Lemon, Cameron, Courbin, Frédéric, Neira, Favio, Anguita, Timo, Galan, Aymeric, Kim, Sam, Hempel, Maren, Hempel, Angela, Lachaume, Régis
We present the proof-of-concept of a method to find strongly lensed quasars using their spatially-extended photometric variability through difference imaging in cadenced imaging survey data. We apply the method to Pan-STARRS, starting with an initial
Externí odkaz:
http://arxiv.org/abs/2307.13729
Autor:
Zakhozhay, O., Launhardt, R., Mueller, A., Brems, S., Eigenthaler, P., Gennaro, M., Hempel, A., Hempel, M., Henning, Th., Kennedy, G., Kim, S., Kuerster, M., Lachaume, R., Manerikar, Y., Patel, J., Pavlov, A., Reffert, S., Trifonov, T.
Publikováno v:
A&A 667, A63 (2022)
We introduce our Radial Velocity Survey for Planets around Young stars (RVSPY), characterise our target stars, and search for substellar companions at orbital separations smaller than a few au from the host star. We use the FEROS spectrograph to obta
Externí odkaz:
http://arxiv.org/abs/2209.01125
Autor:
Lachaume, Régis
In optical and infrared long-baseline interferometry, data often display significant correlated errors because of uncertain multiplicative factors such as the instrumental transfer function or the pixel-to-visibility matrix. In the context of model f
Externí odkaz:
http://arxiv.org/abs/2104.07082
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
Autor:
Kluska, J., Berger, J. -P., Malbet, F., Lazareff, B., Benisty, M., Bouquin, J. -B. Le, Absil, O., Baron, F., Delboulbé, A., Duvert, G., Isella, A., Jocou, L., Juhasz, A., Kraus, S., Lachaume, R., Ménard, F., Millan-Gabet, R., Monnier, J. D., Moulin, T., Perraut, K., Pinte, C., Rochat, S., Soulez, F., Tallon, M., Thi, W. -F., Thiébaut, E., Traub, W., Zins, G.
Publikováno v:
A&A 636, A116 (2020)
The innermost astronomical unit in protoplanetary disks is a key region for stellar and planet formation, as exoplanet searches have shown a large occurrence of close-in planets that are located within the first au around their host star. We aim to r
Externí odkaz:
http://arxiv.org/abs/2004.01594
Autor:
Benjamin Morat, Nadine Lucidarme, Auriane Gibert, Carole Harbulot, Noémie Lachaume, Stéphanie Gréteau, Romain Basmaci
Publikováno v:
Frontiers in Pediatrics, Vol 11 (2023)
BackgroundIn March 2020, a 2-month lockdown of the entire population has been declared in France to limit the spread of COVID-19. Sudden changes in daily life can impact the glycemic control of patients with type 1 diabetes (T1D), especially children
Externí odkaz:
https://doaj.org/article/cb941ff55b444dad8ae51e855218a587
Autor:
Bonvin, V., Millon, M., Chan, J. H. H., Courbin, F., Rusu, C. E., Sluse, D., Suyu, S. H., Wong, K. C., Fassnacht, C. D., Marshall, P. J., Treu, T., Buckley-Geer, E., Frieman, J., Hempel, A., Kim, S., Lachaume, R., Rabus, M., Chao, D. C. -Y., Chijani, M., Gilman, D., Gilmore, K., Rojas, K., Williams, P., Anguita, T., Kochanek, C. S., Meylan, G., Morgan, C., Motta, V., Tewes, M.
We present new measurements of the time delays of WFI2033-4723. The data sets used in this work include 14 years of data taken at the 1.2m Leonhard Euler Swiss telescope, 13 years of data from the SMARTS 1.3m telescope at Las Campanas Observatory and
Externí odkaz:
http://arxiv.org/abs/1905.08260
Autor:
Rabus, Markus, Lachaume, Régis, Jordán, Andrés, Brahm, Rafael, Boyajian, Tabetha, von Braun, Kaspar, Espinoza, Néstor, Berger, Jean-Philippe, Bouquin, Jean-Baptiste Le, Absil, Olivier
We report on 13 new high-precision measurements of stellar diameters for low-mass dwarfs obtained by means of near-infrared long-baseline interferometry with PIONIER at the Very Large Telescope Interferometer. Together with accurate parallaxes from G
Externí odkaz:
http://arxiv.org/abs/1901.08077
Autor:
Lachaume, Régis, Rabus, Markus, Jordán, Andrés, Brahm, Rafael, Boyajian, Tabetha, von Braun, Kaspar, Berger, Jean-Philippe
We propose a method to overcome the usual limitation of current data processing techniques in optical and infrared long-baseline interferometry: most reduction pipelines assume uncorrelated statistical errors and ignore systematics. We use the bootst
Externí odkaz:
http://arxiv.org/abs/1901.02879
Autor:
Lachaume, Xavier
Publikováno v:
Eur. Phys. J. C (2019) 79: 266
In this short note we wonder about the explicit expression of the expanding of the $p$-th Lovelock product. We use the 1990's works of S. A. Fulling et al. on the symmetries of the Riemann tensor, and we show that the number of independent scalars ap
Externí odkaz:
http://arxiv.org/abs/1811.09571