Zobrazeno 1 - 10
of 1 854
pro vyhledávání: '"Absil P"'
Autor:
Daglayan, Hazan, Vary, Simon, Absil, Olivier, Cantalloube, Faustine, Christiaens, Valentin, Gillis, Nicolas, Jacques, Laurent, Leplat, Valentin, Absil, P. -A.
Effective image post-processing algorithms are vital for the successful direct imaging of exoplanets. Standard PSF subtraction methods use techniques based on a low-rank approximation to separate the rotating planet signal from the quasi-static speck
Externí odkaz:
http://arxiv.org/abs/2410.06310
Autor:
Cantalloube, Faustine, Christiaens, Valentin, Mitjans, Carles Cantero, Cioppa, Anthony, Nasedkin, Evert, Absil, Olivier, Delorme, Philippe, Wang, Jason J., Bonse, Markus J., Daglayan, Hazan, Dahlqvist, Carl-Henrik, Guyot, Nathan, Juillard, Sandrine, Mazoyer, Johan, Samland, Matthias, Sabalbal, Mariam, Ruffio, Jean-Baptiste, Van Droogenbroeck, Marc
In this communication, we report on the results of the second phase of the Exoplanet Imaging Data Challenge started in 2019. This second phase focuses on the characterization of point sources (exoplanet signals) within multispectral high-contrast ima
Externí odkaz:
http://arxiv.org/abs/2410.17636
Autor:
Kühnle, H., Patapis, P., Mollière, P., Tremblin, P., Matthews, E., Glauser, A. M., Whiteford, N., Vasist, M., Absil, O., Barrado, D., Min, M., Lagage, P. -O., Waters, L. B. F. M., Guedel, M., Henning, Th., Vandenbussche, B., Baudoz, P., Decin, L., Pye, J. P., Royer, P., van Dishoeck, E. F., Östlin, G., Ray, T. P., Wright, G.
With a temperature of $\sim 285$ K WISE0855 is the coldest brown dwarf observed so far. Using the James Webb Space Telescope (JWST) we obtained observations that allow us to characterize WISE0855s atmosphere focusing on vertical variation in the wate
Externí odkaz:
http://arxiv.org/abs/2410.10933
Autor:
Olikier, Guillaume, Absil, P. -A.
This paper considers the problem of minimizing a differentiable function with locally Lipschitz continuous gradient on the algebraic variety of all $m$-by-$n$ real matrices of rank at most $r$. Several definitions of stationarity exist for this nonco
Externí odkaz:
http://arxiv.org/abs/2409.12298
Autor:
Mâlin, Mathilde, Boccaletti, Anthony, Perrot, Clément, Baudoz, Pierre, Rouan, Daniel, Lagage, Pierre-Olivier, Waters, Rens, Güdel, Manuel, Henning, Thomas, Vandenbussche, Bart, Absil, Olivier, Barrado, David, Bouwman, Jeroen, Cossou, Christophe, Decin, Leen, Glauser, Adrian M., Pye, John, Olofsson, Goran, Glasse, Alistair, Lahuis, Fred, Patapis, Polychronis, Royer, Pierre, Scheithauer, Silvia, Whiteford, Niall, Serabyn, Eugene, Choquet, Elodie, Colina, Luis, Ostlin, Göran, van Dishoeck, Ewine F., Ray, Tom P., Wright, Gillian
Mid-infrared imaging of exoplanets and disks is now possible with the coronagraphs of the MIRI on the JWST. This wavelength range unveils new features of young directly imaged systems and allows us to obtain new constraints for characterizing the atm
Externí odkaz:
http://arxiv.org/abs/2408.16843
Autor:
Sanghi, Aniket, Xuan, Jerry, Wang, Jason, Mawet, Dimitri, Bowler, Brendan, Ngo, Henry, Bryan, Marta, Ruane, Garreth, Absil, Olivier, Huby, Elsa
We present Super-RDI, a unique framework for the application of reference star differential imaging (RDI) to Keck/NIRC2 high-contrast imaging observations with the vortex coronagraph. Super-RDI combines frame selection and signal-to-noise ratio (S/N)
Externí odkaz:
http://arxiv.org/abs/2408.14268
Autor:
Wallack, Nicole L., Ruffio, Jean-Baptiste, Ruane, Garreth, Ren, Bin B., Xuan, Jerry W., Villenave, Marion, Mawet, Dimitri, Stapelfeldt, Karl, Wang, Jason J., Liu, Michael C., Absil, Olivier, Alvarez, Carlos, Bae, Jaehan, Bond, Charlotte, Bottom, Michael, Calvin, Benjamin, Choquet, Élodie, Christiaens, Valentin, Cook, Therese, Castellá, Bruno Femenía, Gonzalez, Carlos Gomez, Guidi, Greta, Huby, Elsa, Kastner, Joel, Knutson, Heather A., Meshkat, Tiffany, Ngo, Henry, Ragland, Sam, Reggiani, Maddalena, Ricci, Luca, Serabyn, Eugene, Uyama, Taichi, Williams, Jonathan P., Wizinowich, Peter, Zawol, Zoe, Zhang, Shangjia, Zhu, Zhaohuan
Recent Atacama Large Millimeter/submillimeter Array (ALMA) observations of protoplanetary disks in the millimeter continuum have shown a variety of radial gaps, cavities, and spiral features. These substructures may be signposts for ongoing planet fo
Externí odkaz:
http://arxiv.org/abs/2408.04048
We give bounds on geodesic distances on the Stiefel manifold, derived from new geometric insights. The considered geodesic distances are induced by the one-parameter family of Riemannian metrics introduced by H\"uper et al. (2021), which contains the
Externí odkaz:
http://arxiv.org/abs/2408.07072
Autor:
Laugier, Romain, Defrère, Denis, Ireland, Michael, Garreau, Germain, Absil, Olivier, Matter, Alexis, Petrov, Romain, Berio, Philippe, Tuthill, Peter, Martinod, Marc-Antoine, Labadie, Lucas
To leverage the angular resolution of interferometry at high contrast, one must employ specialized beam-combiners called interferometric nullers. Nullers discard part of the astrophysical information to optimize the recording of light present in the
Externí odkaz:
http://arxiv.org/abs/2407.17177
Autor:
de Xivry, Gilles Orban, Absil, Olivier, De Rosa, Robert J., Bonse, Markus J., Dannert, Felix, Hayoz, Jean, Grani, Paolo, Puglisi, Alfio, Baruffolo, Andrea, Salasnich, Bernardo, Davies, Ric, Glauser, Adrian M., Huby, Elsa, Kenworthy, Matthew, Quanz, Sascha P., Taylor, William, Zins, Gérard
Publikováno v:
Proceedings of the SPIE, Volume 13097, id. 13097-42 (2024)
The Enhanced Resolution Imager and Spectrograph (ERIS) is the new near-infrared instrument at the VLT-UT4. ERIS replaces and extends the observational capabilities formerly provided by SINFONI and NACO: integral field spectroscopy at 1 - 2.5 $\mu$m,
Externí odkaz:
http://arxiv.org/abs/2407.14406