Results 101 to 110 of about 1,817 (168)

Life Beyond the Solar System: Space Weather and Its Impact on Habitable Worlds [PDF]

, 2018
The search of life in the Universe is a fundamental problem of astrobiology and a major priority for NASA. A key area of major progress since the NASA Astrobiology Strategy 2015 (NAS15) has been a shift from the exoplanet discovery phase to a phase of ...
Airapetian, V. S., Alexander, D., Cohen, O., Danchi, W. C., Dong, C. F., Fahrenbach, A., France, K., Funke, B., Glocer, A., Grenfell, J. L., Gronoff, G., Guedel, M., Hallinan, G., Henning, W. G., Jackman, C., Jin, M., Johnstone, C., Kay, C., Kobayashi, K., Kuang, W., Leisawitz, D., Lueftinger, T., Lynch, B., Maehara, H., Manchester, C., Mlynczak, M., Notsu, Y., Puertas, M. Lopez, Rugheimer, S., Sojka, J., Stamenkovic, V., Stevenson, K. B., van der Holst, B., Verkhoglyadova, O., Yamashiki, Y., Zank, G.   +35 more
core   +1 more source

Speckle statistics in adaptive optics images at visible wavelengths

, 2017
Residual speckles in adaptive optics (AO) images represent a well-known limitation on the achievement of the contrast needed for faint source detection. Speckles in AO imagery can be the result of either residual atmospheric aberrations, not corrected by
Bailey, Vanessa P, Centrone, Mauro, Christou, Julian C., Del Moro, Dario, Esposito, Simone, Fiore, Fabrizio, Giallongo, Emanuele, Hill, John, Hinz, Phil, Pedichini, Fernando, Pinna, Enrico, Puglisi, Alfio, Stangalini, Marco, Vaz, Amali   +13 more
core   +1 more source

Deep Thermal Infrared Imaging of HR 8799 bcde: New Atmospheric Constraints and Limits on a Fifth Planet

, 2014
We present new $L^\prime$ (3.8 $\mu m$) and Br-$\alpha$ (4.05 $\mu m$) data and reprocessed archival $L^\prime$ data for the young, planet-hosting star HR 8799 obtained with Keck/NIRC2, VLT/NaCo and Subaru/IRCS. We detect all four HR 8799 planets in each
Burrows, Adam, Cloutier, Ryan, Currie, Thayne, Fukagawa, Misato, Girard, Julien H., Itoh, Yoichi, Jayawardhana, Ray, Kenyon, Scott J., Kuchner, Marc, Madhusudhan, Nikku, Matsumura, Soko, Pyo, Tae-Soo, Sorahana, Satoko   +12 more
core   +1 more source

Protocol for a cluster randomised control trial evaluating the efficacy and safety of treatment for latent tuberculosis infection in recent migrants within primary care: the CATAPuLT trial

BMC Public Health, 2019
Background The identification and treatment of LTBI is a key component of the WHO’s strategy to eliminate TB. Recent migrants from high TB-incidence countries are recognised to be at risk TB reactivation, and many high-income countries have focused on ...
M. Burman, A. Copas, D. Zenner, V. Hickson, L. Gosce, D. Trathen, R. Ashcroft, A. R. Martineau, I. Abubakar, C. Griffiths, H. Kunst   +10 more
doaj   +1 more source

Exozodi disk models for the HOSTS survey on the LBTI

, 2014
This poster describes a simple model for exozodiacal emission that was developed to interpret observations of the Hunt for Observable Signatures of Terrestrial planetary Systems (HOSTS) project on the Large Binocular Telescope Interferometer (LBTI).
Wyatt, Mark, Kennedy, G., Skemer, A., Bryden, G., Danchi, W. C., Defrere, Denis, Haniff, C., Hinz, P., Mennesson, B., Millan-Gabet, R., Panic, O., Rieke, G., Roberge, A., Serabyn, G., Shannon, A. B., Stapelfeldt, K. R., Weinberger, A. J., LBTI-HOSTS,   +17 more
openaire   +1 more source

Update on the LBTI: a versatile high-contrast and high-resolution infrared imager for a 23-m telescope

, 2014
The Large Binocular Telescope Interferometer (LBTI) is a strategic instrument of the LBT designed for high-sensitivity, high-contrast, and high-resolution infrared imaging of nearby nearby planetary systems. It combines the two 8.4-m apertures of the LBT in various ways including direct (non-interferometric) or Fizeau imaging, non-redundant aperture ...
Defrere, Denis, Hinz, P., Skemer, A., Arbo, P., Bailey, V., Brusa, G., Connors, T., Downey, E., Durney, O., Eisner, J., Grenz, P., Hoffmann, B., Hill, J., Leisenring, J., McMahon, T., Mennesson, M., Millan-Gabet, R., Montoya, M., Nash, M., Skrutskie, M., Sosa, R., Vaitheeswaran, V.   +21 more
openaire   +3 more sources

The HOSTS survey for exo-zodiacal dust: preliminary results and future prospects [PDF]

, 2018
The presence of large amounts of dust in the habitable zones of nearby stars is a significant obstacle for future exo-Earth imaging missions. We executed the HOSTS (Hunt for Observable Signatures of Terrestrial Systems) survey to determine the typical ...
Beichman, C., Ertel, S., Millan-Gabet, R.   +2 more
core  

Analysis of the Observations for Three Telescopes: EHT, FAST and LBTI

Highlights in Science, Engineering and Technology
As technology continuously advances, the telescope technologies available to humans are becoming increasingly refined, leading to the discovery of an ever-growing number of phenomena using these telescopes. This allows for a deeper understanding of the universe one inhabits, with more astronomical phenomena receiving scientific explanations.
openaire   +1 more source

Sensitivity and performance of LBTI/NOMIC spectroscopy: prospects for 10– and 30– meter class mid-IR exoplanet science

Ground-based and Airborne Instrumentation for Astronomy X
Long wavelength infrared (8-13 $μ$m) spectroscopy is invaluable for detecting molecular features in the atmospheres of gas giant and terrestrial exoplanets. The nulling-optimized mid-infrared camera (NOMIC) on the Large Binocular Telescope Interferometer (LBTI) has a low resolution (R$\sim$200) germanium grism that was previously installed but has not ...
Miles, Brittany E., Ertel, Steve, Wagner, Kevin, Apai, Daniel   +3 more
openaire   +2 more sources

Co-Phasing the Large Binocular Telescope: [PDF]

The Large Binocular Telescope Interferometer is a NASA-funded nulling and imaging instrument designed to coherently combine the two 8.4-m primary mirrors of the LBT for high-sensitivity, high-contrast, and high-resolution infrared imaging (1.5-13 ...
Ashby, D., Bailey, V., Brusa, G., Christou, J., Danchi, W. C., Defrere, D., Downey, E., Grenz, P., Hill, J. M., Hinz, P., Hoffmann, W. F., Leisenring, J., Lozi, J., McMahon, T., Mennesson, B., Millan-Gabet, R., Montoya, M., Powell, K., Skemer, A., Vaitheeswaran, V., Vaz, A., Veillet, C.   +21 more
core   +1 more source