Results 1 to 10 of about 7,348 (184)

High angular resolution N-band observation of the silicate carbon star IRAS08002-3803 with the VLTI/MIDI instrument [PDF]

Astronomy & Astrophysics, 2005
15 pages, 8 figures, accepted for publication in A& ...
Ohnaka, Keiichi, Driebe, T., Hofmann, K. -H., Leinert, Ch., Morel, S., Paresce, F., Preibisch, Th., Richichi, A., Schertl, D., Schoeller, M., Waters, L. B. F. M., Weigelt, G., Wittkowski, M.   +12 more
openaire   +3 more sources

Optical parameters relevant for High Angular Resolution at Paranal from GSM instrument and surface layer contribution [PDF]

Astronomy and Astrophysics Supplement Series, 2000
Main atmospheric parameters characterizing the turbulence were measured at the Paranal ESO Observatory (Chile) with the Generalized Seeing Monitor (GSM) during 19 nights in November{December 1998. The median seeing for this period was 0:88 00 , a little worse than average, the spatial coherence outer scale of the wavefrontL0 =2 2:0 m and the median ...
F. Martin, R. Conan, A. Tokovinin, A. Ziad, H. Trinquet, J. Borgnino, A. Agabi, M. Sarazin   +7 more
openaire   +1 more source

High-angular resolution and high contrast observations from Y to L band at the Very Large Telescope Interferometer with the Asgard Instrumental suite

Journal of Astronomical Telescopes, Instruments, and Systems, 2023
sponsorship: M.-A.M. has received funding from the European Union's Horizon 2020 research and innovation program (Grant No. 101004719). S.K. and S.C. acknowledge support from an ERC Consolidator Grant ("GAIA-BIFROST," Grant No. 101003096). S.K. and D.J.M. acknowledge support from STFC (Grant No. ST/V000721/1).
Martinod, Marc-Antoine, Defrere, Denis, Ireland, Michael, Kraus, Stefan, Martinache, Frantz, Tuthill, Peter, Bigioli, Azzurra, Bouzerand, Emilie, Bryant, Julia, Chhabra, Sorabh, Courtney-Barrer, Benjamin, Crous, Fred, Cvetojevic, Nick, Dandumont, Colin, Ertel, Steve, Gardner, Tyler, Garreau, Germain, Glauser, Adrian M., Labadie, Lucas, Lagadec, Tiphaine, Laugier, Romain, Mazzoli, Alexandra, Mortimer, Daniel, Norris, Barnaby, Raskin, Gert, Robertson, Gordon, Sanny, Ahmed, Taras, Adam   +27 more
openaire   +4 more sources

A Multi-instrument and Multi-wavelength High Angular Resolution Study of MWC 614: Quantum Heated Particles Inside the Disk Cavity* [PDF]

The Astrophysical Journal, 2018
Abstract High angular resolution observations of young stellar objects are required to study the inner astronomical units of protoplanetary disks in which the majority of planets form. As they evolve, gaps open up in the inner disk regions and the disks are fully dispersed within ∼10 Myr. MWC 614 is a pretransitional object with a ∼10 au
Jacques Kluska, Stefan Kraus, Claire L. Davies, Tim Harries, Matthew Willson, John D. Monnier, Alicia Aarnio, Fabien Baron, Rafael Millan-Gabet, Theo Ten Brummelaar, Xiao Che, Sasha Hinkley, Thomas Preibisch, Judit Sturmann, Laszlo Sturmann, Yamina Touhami   +15 more
openaire   +3 more sources

High-angular resolution and high-contrast VLTI observations from Y to L band with the Asgard instrumental suite

, 2023
The Very Large Telescope Interferometer is one of the most proficient observatories in the world for high angular resolution. Since its first observations, it has hosted several interferometric instruments operating in various bandwidths in the infrared. As a result, the VLTI has yielded countless discoveries and technological breakthroughs.
Martinod, Marc-Antoine, Defrère, Denis, Ireland, Michael, Kraus, Stefan, Martinache, Frantz, Tuthill, Peter, Bigioli, Azzurra, Bryant, Julia, Chhabra, Sorabh, Courtney-Barrer, Benjamin, Crous, Fred, Cvetojevic, Nick, Dandumont, Colin, Garreau, Germain, Lagadec, Tiphaine, Laugier, Romain, Mortimer, Daniel, Norris, Barnaby, Robertson, Gordon, Taras, Adam   +19 more
openaire   +2 more sources

Prospects for High Angular Resolution Instrumentation at Millimeter and Submillimeter Wavelengths [PDF]

Symposium - International Astronomical Union, 2001
Millimeter- and submillimeter wavelength interferometry is a powerful technique allowing imaging of dust and molecules in a multitude of astronomical environments. With the arrival of the Atacama Large Millimeter Array (ALMA), such studies will be possible with unprecedented sensitivity and a spatial resolution similar to the diffraction limit of large
openaire   +1 more source

Stigmatic Spectroscopic Instruments for the Wavelength Range 30-300 Å With High Angular and Spectral Resolution Using Multi-layer Mirrors [PDF]

International Astronomical Union Colloquium, 1990
A concept of stigmatic spectroscopic instruments for the range λ ~30-300 Å is presented, A parallel beam is dispersed by means of a plane diffraction grating at grazing incidence, whereas focusing of the XUV radiation is performed by a concave multilayer mirror at normal incidence.
openaire   +1 more source

Pushing high angular resolution and high contrast observations on the VLTI from Y to L band with the Asgard instrumental suite: integration status and plans

Optical and Infrared Interferometry and Imaging IX
ESO's Very Large Telescope Interferometer has a history of record-breaking discoveries in astrophysics and significant advances in instrumentation. The next leap forward is its new visitor instrument, called Asgard. It comprises four natively collaborating instruments: HEIMDALLR, an instrument performing both fringe tracking and stellar interferometry ...
Martinod, Marc-Antoine, Defrère, Denis, Ireland, Michael J., Kraus, Stefan, Martinache, Frantz, Tuthill, Peter G., Allouche, Fatmé, Bouzerand, Emilie, Bryant, Julia, Carter, Josh, Chhabra, Sorabh, Courtney-Barrer, Benjamin, Crous, Fred, Cvetojevic, Nick, Dandumont, Colin, Ertel, Steve, Gardner, Tyler, Garreau, Germain, Glauser, Adrian Michael, Haubois, Xavier, et al.   +20 more
openaire   +5 more sources

High Angular Resolution and Extrasolar Planets: Beyond Basic Instrumental Performances

, 2002
I review the characteristics of planetary systems accessible to imaging. I show that, beyond the basic angular resolution and dynamics performances of an optical ``architecture'', other performances such as photometric precision, spectral range or timing are necessary to access some physical characteristics of the planets.
openaire   +2 more sources

Life-size 3D modeling for C1-C2 fixation planning: A preoperative tool for atlantoaxial stabilization techniques. [PDF]

Brain Spine
Kendirlioglu BC, Sulaimanov U, Sahin MH, Korkmaz TS, Keles A, Erginoglu U, Aydogmus E, Greeneway GP, Zaazoue MA, Baskaya MK.   +9 more
europepmc   +1 more source