Impact flux on Jupiter: From superbolides to large-scale collisions

Hueso, R.; Pérez‐Hoyos, S.; Sánchez‐Lavega, A.; Wesley, A.; Hall, G. G.; Go, Christopher; Tachikawa, Masashi; Aoki, Kentaro; Ichimaru, M.; Pond, Jarrad W. T.; Korycansky, D. G.; Palotai, Csaba; Chappell, Greta; Rebeli, N.; Harrington, J.; Delcroix, M.; Wong, Michael H.; Pater, Imke de; Fletcher, Leigh N.; Hammel, Heidi B.; Orton, Glenn S.; Tabe, I.; Watanabe, J.; Moreno, J. C.

doi:10.1051/0004-6361/201322216

Cited by 37 publications

(74 citation statements)

References 49 publications

(78 reference statements)

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“…Notably, software to detect bright transients in planetary video sequences has been developed and made publicly available (e.g., http://pvol2.ehu.eus/psws/jovian_impacts/) and has been successful in detecting impact flashes on Jupiter and the moon (e.g., Hueso et al 2013).…”

Section: Geographic Distributionmentioning

confidence: 99%

Lightning detection on Venus: a critical review

Lorenz

2018

Prog Earth Planet Sci

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Claimed detections and nondetections of lightning and related electromagnetic emissions on Venus are qualitatively contradictory. Here, motivated by the commencement of observations by the Akatsuki spacecraft and by studies of future missions, we critically review spacecraft and ground-based observations of the past 40 years, in an attempt to reconcile the discordant reports with a minimal number of assumptions. These include invoking alternative interpretations of individual reports, guided by sensitivity thresholds, controls, and other objective benchmarks of observation integrity. The most compelling evidence is in fact the first, the very low frequency (VLF) radio emissions recorded beneath the clouds by all four of the Veneras 11-13 landers, and those data are re-examined closely, finding power-law amplitude characteristics and substantial differences between the different profiles. It is concluded that some kind of frequent electrical activity is supported by the preponderance of observations, but optical emissions are not consistent with terrestrial levels of activity. Venus' activity may, like Earth's, have strong temporal and/or spatial variability, which coupled with the relatively short accumulated observation time for optical measurements, can lead to qualitative discrepancies between observation reports. We note a number of previously unconsidered observations and outline some considerations for future observations.

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Section: Geographic Distributionmentioning

confidence: 99%

Lightning detection on Venus: a critical review

Lorenz

2018

Prog Earth Planet Sci

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“…For instance, the flux of incoming objects from the trans-Neptunian region should be an order of magnitude larger than what currently estimated [e.g. Hueso et al (2013)]. A ring-forming collision in the primordial more massive trans-Neptunian belt might be a possible alternative.…”

Section: Discussionmentioning

confidence: 87%

Assessment of different formation scenarios for the ring system of (10199) Chariklo

Melita

Duffárd

Ortiz

et al. 2017

A&A

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Context. The discovery that the centaur (10199) Chariklo possesses a ring system opens questions about their origin. Aims. We here asses the plausibility of different scenarios for the origin of the observed ring system. Methods. We first consider the possibility that the material of the ring originated in the disruption of a satellite that had reached a critical distance from the centaur. We discuss the conditions for the putative satellite to approach the centaur as a consequence of tidal interaction. A three-body encounter is also considered as a transport mechanism. In addition, we study the case in which the ring is formed by the ejecta of a cratering collision on the centaur and we constrain the collision parameters and the size of the resulting crater of the event. Finally, we consider that the ring material originates from a catastrophic collision between a background object and a satellite located at a distance corresponding to the the current location of the ring. We compute the typical timescales for these scenarios.Results. We estimate that in order to be tidally disrupted a satellite would have had to be larger than approximately 6.5 km at the location of the rings. However the tidal interaction is rather weak for objects of the size of outer solar system bodies at the ring location, therefore we considered other more effective mechanisms by which a satellite migt have approached the centaur. Collisonal scenarios are both physically plausible for the formation, but semianalytical estimations indicate that the probability of the corresponding collisions is low under current conditions.

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“…This led to an international campaign of professional observations to understand the asteroidal collision that had created the scar (e.g., de Pater et al 2010, Hammel et al 2010. Although the 2009 impact was out of view from the Earth, at least three flashes have been confirmed between 2010 and 2012, their light curves have been used to determine the sizes and frequency of objects colliding with Jupiter (e.g., Hueso et al 2013) (Figure 2). Citizen scientists have developed free software to allow observers to search for impact flashes in an automated way [e.g., Jupiter impact detections (http://www.pvol.ehu.es/software) and LunarScan from the ALPO Lunar Meteoritic Impact Search for transient impact flashes recorded on the Moon (http://alpo-astronomy.org/lunarupload/lunimpacts.htm)].…”

Section: Solar System Impactsmentioning

confidence: 99%

Ideas for Citizen Science in Astronomy

Marshall

Lintott

Fletcher

2015

Annu. Rev. Astron. Astrophys.

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We review the relatively new, internet-enabled, and rapidly-evolving field of citizen science, focusing on research projects in stellar, extragalactic and solar system astronomy that have benefited from the participation of members of the public, often in large numbers. We find these volunteers making contributions to astronomy in a variety of ways: making and analyzing new observations, visually classifying features in images and light curves, exploring models constrained by astronomical datasets, and initiating new scientific enquiries. The most productive citizen astronomy projects involve close collaboration between the professionals and amateurs involved, and occupy scientific niches not easily filled by great observatories or machine learning methods: citizen astronomers are most strongly motivated by being of service to science. In the coming years we expect participation and productivity in citizen astronomy to increase, as survey datasets get larger and citizen science platforms become more efficient. Opportunities include engaging the public in ever more advanced analyses, and facilitating citizen-led enquiry by designing professional user interfaces and analysis tools with citizens in mind.Comment: In progress. The most up to date PDF file should be downloaded from http://tinyurl.com/CitizenAstronomyReview . We invite feedback via github issues at http://tinyurl.com/CitizenAstronomyReviewFeedback, and aim to submit to ARAA on September 2

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Impact flux on Jupiter: From superbolides to large-scale collisions

Cited by 37 publications

References 49 publications

Lightning detection on Venus: a critical review

Lightning detection on Venus: a critical review

Assessment of different formation scenarios for the ring system of (10199) Chariklo

Ideas for Citizen Science in Astronomy

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