Saturn-like ring system around Uranus

Bhattacharyya, J. C.; Bappu, M. K. V.

doi:10.1038/270503a0

Cited by 19 publications

(6 citation statements)

References 3 publications

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“…Stellar ocultations have an impressive record of discoveries, published in high impact journals as Nature or Science. For instance, they allow to discover Uranus' narrow and dense rings (Bhattacharyya & Bappu 1977, Elliot et al 1977, Neptune's ring arcs (Hubbard et al 1986, Sicardy et al 1986, measure Neptune's shape (Sicardy et al 1986), probe Titan's atmosphere (Sicardy et al 1990) and Triton's atmosphere (Elliot et al 1997), discover material around the Centaur object Chiron (Elliot et al 1995), reveal a spectacular expansion of Pluto's atmosphere between 1988 and 2002 (Elliot et al 2003, Sicardy et al 2003, measure the size of its satellite Charon at kilometric accuracy (Gulbis et al 2006, Sicardy et al 2006a, as well as the sizes of the very remote dwarf planets Eris (Sicardy et al 2011) and Makemake (Ortiz et al 2012), and more recently, discover dense and narrow rings around the Centaur object Chariklo, the first body ever known to possess ring besides the giant planets (Braga-Ribas et al 2014). Fig.…”

Section: Results Obtained By Stellar Occultationsmentioning

confidence: 99%

Exploring the Solar System using stellar occultations

Sicardy¹

2017

Proc. IAU

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Stellar occultations by solar system objects allow kilometric accuracy, permit the detection of tenuous atmospheres (at nbar level), and the discovery of rings. The main limitation was the prediction accuracy, typically 40 mas, corresponding to about 1,000 km projected at the body. This lead to large time dedicated to astrometry, tedious logistical issues, and more often than not, mere miss of the event. The Gaia catalog, with sub-mas accuracy, hugely improves both the star positions, resulting in achievable accuracies of about 1 mas for the shadow track on Earth. This permits much more carefully planned campaigns, with success rate approaching 100%, weather permitting. Scientific perspectives are presented, e.g. central flashes caused by Plutos atmosphere revealing hazes and winds near its surface, grazing occultations showing topographic features, occultations by Chariklos rings unveiling dynamical features such as proper mode “breathing”.

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Section: Results Obtained By Stellar Occultationsmentioning

confidence: 99%

Exploring the Solar System using stellar occultations

Sicardy¹

2017

Proc. IAU

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“…A system of broad rings around Uranus, with an optical depth as great as 0.05, has been reported by Bhattacharyya and Bappu (1977) and Bhattacharyya et al^. (1980).…”

Section: 500mentioning

confidence: 88%

“…Some latitude in the latter criterion would be acceptable to allow for elliptical rings. Reports of dips in signal that remain unexplained, have been given by Churms (1977), Tomita (1977, Bhattacharyya and Bappu (1977), Chen et al (1978), Millis and, Bouchet, Perrier and Sicardy (1980), and Hubbard and Zellner (1980). These dips have not been confirmed as …”

Section: Observationsmentioning

confidence: 94%

Rings of Uranus: A Review of Occultation Results

Elliot

1982

International Astronomical Union Colloquium

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“…pulsation of white dwarfs, but are not possible from either Canary Islands or Australia due to day light and other related reasons, are successfully carried out from the Indian sites. Two examples when this was vital were the discovery of the rings of Uranus [10,11] and the earliest optical observations of GRB afterglows [8,9,12,13].…”

Section: Optical and Near-ir Astronomy In The Present Era Of Multi Wa...mentioning

confidence: 99%

A Global Prospective of the Indian Optical and Near-Infrared Observational Facilities in the Field of Astronomy and Astrophysics: A Review

Sagar

2016

Proc. Natl. Acad. Sci., India, Sect. A Phys. Sci.

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A review of modernization and growth of ground based optical and near-infrared astrophysical observational facilities in the globe attributed to the recent technological developments in opto-mechanical, electronics and computer science areas is presented. Hubble Space Telescope (HST) and speckle and adaptive ground based imaging have obtained images better than 0.1 arc sec angular resolution bringing the celestial objects closer to us at least by a factor of 10 during the last two decades. From the light gathering point of view, building of large size (> 5meter aperture) ground based optical and near-infrared telescopes based on latest technology have become economical in recent years. Consequently, in the world, a few 8-10 meter size ground-based optical and near-infrared telescopes are being used for observations of the celestial objects, three 25-40 meter size are under design stage and making of a ~ 100 meter size telescope is under planning stage. In India, the largest sized optical and near-infrared telescope is the modern 3.6-meter located at Devasthal, Nainital. However, the existing Indian moderate size telescopes equipped with modern backend instruments have global importance due to their geographical location. Recently, the Government of India approved India's participation in the Thirty Meter Telescope (TMT) project.

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Saturn-like ring system around Uranus

Cited by 19 publications

References 3 publications

Exploring the Solar System using stellar occultations

Exploring the Solar System using stellar occultations

Rings of Uranus: A Review of Occultation Results

A Global Prospective of the Indian Optical and Near-Infrared Observational Facilities in the Field of Astronomy and Astrophysics: A Review

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