Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Norris, Barnaby R. M."'
Autor:
Wong, Alison P., Norris, Barnaby R. M., Deo, Vincent, Tuthill, Peter G., Scalzo, Richard, Sweeney, David, Ahn, Kyohoon, Lozi, Julien, Vievard, Sebastien, Guyon, Olivier
The pyramid wavefront sensor (PyWFS) has become increasingly popular to use in adaptive optics (AO) systems due to its high sensitivity. The main drawback of the PyWFS is that it is inherently nonlinear, which means that classic linear wavefront reco
Externí odkaz:
http://arxiv.org/abs/2311.02595
Autor:
Sweeney, David, Norris, Barnaby R. M., Tuthill, Peter, Scalzo, Richard, Wei, Jin, Betters, Christopher H., Leon-Saval, Sergio G.
Publikováno v:
Journal of Astronomical Telescopes, Instruments, and Systems. 7(2) (2021) 1-20
Photonic lanterns allow the decomposition of highly multimodal light into a simplified modal basis such as single-moded and/or few-moded. They are increasingly finding uses in astronomy, optics and telecommunications. Calculating propagation through
Externí odkaz:
http://arxiv.org/abs/2108.13274
Autor:
Cvetojevic, Nick, Norris, Barnaby R. M., Gross, Simon, Jovanovic, Nemanja, Arriola, Alexander, Lacour, Sylvestre, Kotani, Takayuki, Lawrence, Jon S., Withford, Michael J., Tuthill, Peter
Publikováno v:
Appl. Opt. 60, D33-D42 (2021)
One key advantage of single-mode photonic technologies for interferometric use is their ability to easily scale to an ever increasing number of inputs without a major increase in the overall device size, compared to traditional bulk optics. This is p
Externí odkaz:
http://arxiv.org/abs/2105.01381
Autor:
Norris, Ray P., Norris, Barnaby R. M.
There are two puzzles surrounding the Pleiades, or Seven Sisters. First, why are the mythological stories surrounding them, typically involving seven young girls being chased by a man associated with the constellation Orion, so similar in vastly sepa
Externí odkaz:
http://arxiv.org/abs/2101.09170
Autor:
Bos, Steven P., Vievard, Sébastien, Wilby, Michael J., Snik, Frans, Lozi, Julien, Guyon, Olivier, Norris, Barnaby R. M., Jovanovic, Nemanja, Martinache, Frantz, Sauvage, Jean-François, Keller, Christoph U.
Publikováno v:
A&A 639, A52 (2020)
High-contrast imaging (HCI) observations of exoplanets can be limited by the island effect (IE). On the current generation of telescopes, the IE becomes a severe problem when the ground wind speed is below a few meters per second. This is referred to
Externí odkaz:
http://arxiv.org/abs/2005.12097
Autor:
Norris, Barnaby R. M., Wei, Jin, Betters, Christopher H., Wong, Alison, Leon-Saval, Sergio G.
Publikováno v:
Nat Commun 11, 5335 (2020)
Adaptive optics (AO) is critical in astronomy, optical communications and remote sensing to deal with the rapid blurring caused by the Earth's turbulent atmosphere. But current AO systems are limited by their wavefront sensors, which need to be in an
Externí odkaz:
http://arxiv.org/abs/2003.05158
Autor:
Norris, Barnaby R. M., Cvetojevic, Nick, Lagadec, Tiphaine, Jovanovic, Nemanja, Gross, Simon, Arriola, Alexander, Gretzinger, Thomas, Martinod, Marc-Antoine, Guyon, Olivier, Lozi, Julien, Withford, Michael J., Lawrence, Jon S., Tuthill, Peter
The characterisation of exoplanets is critical to understanding planet diversity and formation, their atmospheric composition and the potential for life. This endeavour is greatly enhanced when light from the planet can be spatially separated from th
Externí odkaz:
http://arxiv.org/abs/1911.09808
Autor:
Lykou, Foteini, Zijlstra, Albert A., Kluska, Jacques, Lagadec, Eric, Tuthill, Peter G., Avison, Adam, Norris, Barnaby R. M., Parker, Quentin A.
We present the first-ever images of the circumstellar environment of the carbon-rich AGB star II Lup in the infrared and sub-mm wavelengths, and the discovery of the envelope's non-spherical morphology with the use of high-angular resolution imaging
Externí odkaz:
http://arxiv.org/abs/1808.00279
Akademický článek
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Autor:
Norris, Barnaby R. M., Tuthill, Peter G., Ireland, Michael J., Lacour, Sylvestre, Zijlstra, Albert A., Lykou, Foteini, Evans, Thomas M., Stewart, Paul, Bedding, Timothy R.
Publikováno v:
Nature (2012), 484, 220-222 (12 April 2012)
Intermediate-mass stars end their lives by ejecting the bulk of their envelope via a slow dense wind back into the interstellar medium, to form the next generation of stars and planets. Stellar pulsations are thought to elevate gas to an altitude coo
Externí odkaz:
http://arxiv.org/abs/1204.2640