Zobrazeno 1 - 10
of 340
pro vyhledávání: '"Martinache, F."'
Autor:
N’Diaye, M., Martinache, F., Jovanovic, N., Lozi, J., Guyon, O., Norris, B., Ceau, A., Mary, D.
Context. Island effect (IE) aberrations are induced by differential pistons, tips, and tilts between neighboring pupil segments on ground-based telescopes, which severely limit the observations of circumstellar environments on the recently deployed e
Externí odkaz:
http://hdl.handle.net/10150/627093
http://arizona.openrepository.com/arizona/handle/10150/627093
http://arizona.openrepository.com/arizona/handle/10150/627093
Autor:
Cvetojevic, N., Jovanovic, N., Gross, S., Norris, B., Spaleniak, I., Schwab, C., Withford, M. J., Ireland, M., Tuthill, P., Guyon, O., Martinache, F., Lawrence, J. S.
In an attempt to develop a streamlined astrophotonic instrument, we demonstrate the realization of an all-photonic device capable of both multimode to single mode conversion and spectral dispersion on an 8-m class telescope with efficient coupling. T
Externí odkaz:
http://hdl.handle.net/10150/626070
http://arizona.openrepository.com/arizona/handle/10150/626070
http://arizona.openrepository.com/arizona/handle/10150/626070
Autor:
Jovanovic, N., Schwab, C., Guyon, O., Lozi, J., Cvetojevic, N., Martinache, F., Leon-Saval, S., Norris, B., Gross, S., Doughty, D., Currie, T., Takato, N.
Photonic technologies off er numerous advantages for astronomical instruments such as spectrographs and interferometers owing to their small footprints and diverse range of functionalities. Operating at the diffraction-limit, it is notoriously diffic
Externí odkaz:
http://hdl.handle.net/10150/625827
http://arizona.openrepository.com/arizona/handle/10150/625827
http://arizona.openrepository.com/arizona/handle/10150/625827
Autor:
Jovanovic, N., Cvetojevic, N., Norris, B., Betters, C., Schwab, C., Lozi, J., Guyon, O., Gross, S., Martinache, F., Tuthill, P., Doughty, D., Minowa, Y., Takato, N., Lawrence, J.
We demonstrate for the first time an efficient, photonic-based astronomical spectrograph on the 8-m Subaru Telescope. An extreme adaptive optics system is combined with pupil apodiziation optics to efficiently inject light directly into a single-mode
Externí odkaz:
http://hdl.handle.net/10150/625708
http://arizona.openrepository.com/arizona/handle/10150/625708
http://arizona.openrepository.com/arizona/handle/10150/625708
Autor:
Pathak, P., Guyon, O., Jovanovic, N., Lozi, J., Martinache, F., Minowa, Y., Kudo, T., Takami, H., Hayano, Y., Narita, N.
Direct detection and spectroscopy of exoplanets requires high-contrast imaging. For habitable exoplanets in particular, located at a small angular separation from the host star, it is crucial to employ small inner working angle (IWA) coronagraphs tha
Externí odkaz:
http://hdl.handle.net/10150/622414
http://arizona.openrepository.com/arizona/handle/10150/622414
http://arizona.openrepository.com/arizona/handle/10150/622414
Autor:
Jovanovic, N., Cvetojevic, N., Schwab, C., Norris, B., Lozi, J., Gross, S., Betters, C., Singh, G., Guyon, O., Martinache, F., Doughty, D., Tuthill, P.
High-order wavefront correction is not only beneficial for high-contrast imaging, but also spectroscopy. The size of a spectrograph can be decoupled from the size of the telescope aperture by moving to the diffraction limit which has strong implicati
Externí odkaz:
http://hdl.handle.net/10150/622807
http://arizona.openrepository.com/arizona/handle/10150/622807
http://arizona.openrepository.com/arizona/handle/10150/622807
Autor:
Pathak, Prashant, Guyon, Olivier, Jovanovic, Nemanja, Lozi, Julien, Martinache, F., Minowa, Y., Kudo, T., Takami, H., Hayano, Y., Narita, N.
In the field of exoplanetary sciences, high contrast imaging is crucial for the direct detection of, and answering questions about habitability of exoplanets. For the direct imaging of habitable exoplanets, it is important to employ low inner working
Externí odkaz:
http://hdl.handle.net/10150/622049
http://arizona.openrepository.com/arizona/handle/10150/622049
http://arizona.openrepository.com/arizona/handle/10150/622049
Autor:
Jovanovic, N., Guyon, O., Lozi, J., Currie, T., Hagelberg, J., Norris, B., Singh, G., Pathak, P., Doughty, D., Goebel, S., Males, J., Kuhn, J., Serabyn, E., Tuthill, P., Schworer, G., Martinache, F., Kudo, T., Kawahara, H., Kotani, T., Ireland, M., Feger, T., Rains, A., Bento, J., Schwab, C., Coutts, D., Cvetojevic, N., Gross, S., Arriola, A., Lagadec, T., Kasdin, J., Groff, T., Mazin, B., Minowa, Y., Takato, N., Tamura, M., Takami, H., Hayashi, M.
SCExAO is the premier high-contrast imaging platform for the Subaru Telescope. It offers high Strehl ratios at near-IR wavelengths (y-K band) with stable pointing and coronagraphs with extremely small inner working angles, optimized for imaging faint
Externí odkaz:
http://hdl.handle.net/10150/622018
http://arizona.openrepository.com/arizona/handle/10150/622018
http://arizona.openrepository.com/arizona/handle/10150/622018
Autor:
Bos, S. P., Miller, K. L., Lozi, J., Guyon, O., Doelman, D. S., Vievard, S., Sahoo, A., Deo, V., Jovanovic, N., Martinache, F., Currie, T., Snik, F.
Publikováno v:
A&A 653, A42 (2021)
One of the key noise sources that currently limits high-contrast imaging observations for exoplanet detection is quasi-static speckles. Quasi-static speckles originate from slowly evolving non-common path aberrations (NCPA). The purpose of this work
Externí odkaz:
http://arxiv.org/abs/2106.06286
Autor:
Kammerer, J., Kasper, M., Ireland, M. J., Köhler, R., Laugier, R., Martinache, F., Siebenmorgen, R., Ancker, M. E. van den, van Boekel, R., Herbst, T. M., Pantin, E., Käufl, H. -U., de la Roche, D. J. M. Petit dit, Ivanov, V. D.
T Tauri has long been the prototypical young pre-main-sequence star. However, it has now been decomposed into a triple system with a complex disk and outflow geometry. We aim to measure the brightness of all three components of the T Tauri system (T
Externí odkaz:
http://arxiv.org/abs/2012.11418