Results 21 to 30 of about 346 (266)

Stellar occultations by trans-Neptunian objects

The Astronomy and Astrophysics Review
Stellar occultations provide a powerful tool to explore objects of the outer solar system. The Gaia mission now provides milli-arcsec accuracy on the predictions of these events and makes possible observations that were previously unthinkable. Occultations return kilometric accuracies on the three-dimensional shape of bodies irrespective of their ...
Bruno Sicardy, Felipe Braga-Ribas, Marc W. Buie, José Luis Ortiz, Françoise Roques   +4 more
openaire   +5 more sources

Retrievals from GOMOS stellar occultation measurements using characterization of modeling errors [PDF]

Atmospheric Measurement Techniques, 2010
In this paper, we discuss the development of the inversion algorithm for the GOMOS (Global Ozone Monitoring by Occultation of Star) instrument on board the Envisat satellite.
V. F. Sofieva, J. Vira, E. Kyrölä, J. Tamminen, V. Kan, F. Dalaudier, A. Hauchecorne, J.-L. Bertaux, D. Fussen, F. Vanhellemont, G. Barrot, O. Fanton d'Andon   +11 more
doaj   +1 more source

Comparative Analysis of Starlight Occultation Data Processing

Atmosphere, 2023
In order to improve the inversion accuracy of stellar occultation data and to provide a reference for the selection of inversion methods with higher accuracy in the future, this study compared and analyzed the inversion effects of two different methods ...
Mingchen Sun, Qinglin Zhu, Xiang Dong, Bin Xu, Hong-Guang Wang, Xuan Cheng   +5 more
doaj   +1 more source

CHIMERA Occultation Constraints on the Abundance of Kilometer-scale Kuiper Belt Objects

The Astronomical Journal, 2023
Occultations provide indirect sensitivity to the number density of small Kuiper Belt objects (KBOs) too faint to directly detect telescopically. We present results from the Caltech HI-speed Multicolor camERA (CHIMERA) survey with the Palomar Hale ...
Qicheng Zhang, Gregg W. Hallinan, Navtej S. Saini, Hilke E. Schlichting, Leon K. Harding, Jennifer W. Milburn   +5 more
doaj   +1 more source

Lunar Occultation Measurements of Stellar Angular Diameters [PDF]

Symposium - International Astronomical Union, 1997
Offering an angular resolution which has remained unattained by any other technique for decades, lunar occultations have traditionally been the most productive method for the measurement of stellar angular diameters. Unlike interferometric methods, which are limited in resolution by the size of the aperture or of the baseline between apertures, in a ...
openaire   +1 more source

Gaia17bpp: A Giant Star with the Deepest and Longest Known Dimming Event

The Astrophysical Journal, 2023
We report the serendipitous discovery of Gaia17bpp/2MASS J19372316+1759029, a binary star with a deep single large-amplitude dimming event of ∼4.5 mag that lasted over 6.5 yr.
Anastasios Tzanidakis, James R. A. Davenport, Eric C. Bellm, Yuankun Wang   +3 more
doaj   +1 more source

Triton stellar occultation candidates: 1995-1999

The Astronomical Journal, 1995
We have completed a search for candidates for stellar occultations by Triton over the years 1995-1999. CCd strip scan images provided star positions in the relevant sky area to a depth of about 17.5 R magnitude. Over this time period, we find that Triton passes within 1.0 arcsec of 75 stars.
S. W. McDonald, J. L. Elliot
openaire   +1 more source

An exploration of Pluto’s environment through stellar occultations [PDF]

Astronomy & Astrophysics, 2014
Context. Pluto has five known satellites with diameters ranging from ~1200 km down to ~40 km, a possible outcome of a collisional origin. Smaller objects probably exist and may maintain tenuous rings, thus representing hazards during the New Horizons flyby of July 2015. Aims. The goal is to provide an upper limit for the numbers of unseen small bodies
Boissel, Y., Sicardy, B., Roques, F., Gaulme, P., Doressoundiram, A., Widemann, T., Ivanov, V.D., Marco, O., Mason, E., Ageorges, N., Mousis, O., Rousselot, P., Dhillon, V. S., Littlefair, S. P., Marsh, T. R., Assafin, M., Ribas, F. Braga, Neto, D. da Silva, Camargo, J.I.B., Andrei, A., Martins, R. Vieira, Behrend, R., Kretlow, M.   +22 more
openaire   +4 more sources

Study of atmospheres in the solar system, from stellar occultation or planetary transit

Comptes Rendus. Physique, 2022
Stellar occultations and transits occur when a planetary body passes in front of a star (including our Sun). For objects with an atmosphere, refraction plays an essential role to explain the drops of flux and the aureoles observed during these events ...
Sicardy, Bruno
doaj   +1 more source

The Structure of Chariklo’s Rings from Stellar Occultations [PDF]

The Astronomical Journal, 2017
Abstract Two narrow and dense rings (called C1R and C2R) were discovered around the Centaur object (10199) Chariklo during a stellar occultation observed on 2013 June 3. Following this discovery, we planned observations of several occultations by Chariklo’s system in order to better characterize the physical properties of the ring and ...
Bérard, D., Sicardy, B., Camargo, J. I. B., Desmars, Josselin, Braga-Ribas, F., Ortiz, J.-L., Duffard, R., Morales, N., Meza, E., Leiva, R., Benedetti-Rossi, G., Vieira-Martins, R., Gomes Júnior, A.-R., Assafin, M., Colas, F., Dauvergne, J.-L., Kervella, P., Lecacheux, J., Maquet, L., Vachier, F., Renner, S., Monard, B., Sickafoose, A. A., Breytenbach, H., Genade, A., Beisker, W., Bath, K.-L., Bode, H.-J., Backes, M., Ivanov, V. D., Jehin, Emmanuel, Gillon, Michaël, Manfroid, Jean, Pollock, J., Tancredi, G., Roland, S., Salvo, R., Vanzi, L., Herald, D., Gault, D., Kerr, S., Pavlov, H., Hill, K. M., Bradshaw, J., Barry, M. A., Cool, A., Lade, B., Cole, A., Broughton, J., Newman, J., Horvat, R., Maybour, D., Giles, D., Davis, L., Paton, R. A., Loader, B., Pennell, A., Jaquiery, P.-D., Brillant, S., Selman, F., Dumas, C., Herrera, C., Carraro, G., Monaco, L., Maury, A., Peyrot, A., Teng-Chuen-Yu, J.-P., Richichi, A., Irawati, P., De Witt, C., Schoenau, P., Prager, R., Colazo, C., Melia, R., Spagnotto, J., Blain, A., Alonso, S., Román, A., Santos-Sanz, P., Rizos, J.-L., Maestre, J.-L., Dunham, D.   +81 more
openaire   +4 more sources