Microbial Component Detection in Enceladus Snowing Phenomenon

Kotlarz, Jan; Zielenkiewicz, Urszula; Zalewska, Natalia; Kubiak, Katarzyna

doi:10.1134/s199034132002008x

Cited by 4 publications

(7 citation statements)

References 27 publications

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“…Há precipitação de minerais, formando torres de estruturas similar a chaminés. Na Figura 3, um ambiente de cerca de 90 • C e pH alcalino na faixa 9-11, dominado, por exemplo, pelo grupo de arqueas da ordem Methanosarcinales [16,17].…”

Section: Os Extremófilos Terrestresunclassified

“…Provavelmente a principal origem da da atividade da lua vem da dissipação de energia por marés [31]. Além disso, a ressonância orbital de 2:1 com o satélite Dione [32] e o decaimento radioativo de componentes do núcleo também podem contribuir para o fenômeno [17,33].…”

Section: Os Extremófilos Terrestresunclassified

“…Através dos flybys da Cassini, o espectrômetro de massa e o coletor de poeira cósmica identificaram que a composição das plumas é primariamente água -mais de 90% de H 2 O. Além disso, CO 2 , amônia (NH 3 ), CH 4 , H 2 , sulfato de hidrogênio (H 2 S), metanol (CH 3 OH), cianeto de hidrogênio (HCN) e outros compostos orgânicos leves estão presentes. Também há sais, como NaCl, carbonato de sódio (Na 2 CO 3 ), bicarbonato de sódio (NaHCO 3 ) e cloreto de potássio (KCl) [17,18]. O pH do oceano é estimado entre 11 e 12.…”

Section: Os Extremófilos Terrestresunclassified

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Habitabilidade em luas de sistemas planetários: uma nova fronteira

Pacheco

Fonseca

2022

Cad. Astro.

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Os voos espaciais realizados nas décadas 80-2000 trouxeram imensos progressos em nossos conhecimentos sobre as condições físicas e químicas existentes nas grandes luas dos planetas gigantes gasosos do Sistema Solar. Sobrevoos próximos sobretudo de Titan, Europa e Enceladus revelaram características surpreendentes sobre essas luas e permitiram compor um quadro bastante detalhado de suas superfícies e interiores e da atmosfera, no caso de Titan. A descoberta de oceanos interiores em praticamente todas as grandes luas de Saturno e Júpiter abriu a extraordinária perspectiva de poder existir vida extremófila nesses locais, algo desconhecido antes. Neste artigo, apresentamos características, sobretudo sobre essas três luas, e argumentos que defendem essa tese: uma nova zona de habitabilidade parece existir nos satélites rochosos de exoplanetas gigantes gasosos, multiplicando a possibilidade de existir vida extremófila através da Via Láctea.

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Section: Os Extremófilos Terrestresunclassified

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Habitabilidade em luas de sistemas planetários: uma nova fronteira

Pacheco

Fonseca

2022

Cad. Astro.

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“…For large particles (comparable or larger than the average size of water vapour particles and ice crystals particles, > 1 µm), we can expect their higher density at the base of the geyser plume. However, it should be assumed for VOC particles that they will be equally distributed throughout the whole plume (see kinetic simulation results for 6F and 1F particles in [44]). VOC's assigned to selected microorganisms (Table 1) in opposition to the microorganisms themselves might be successfully detected using the spectrometers proposed.…”

Section: Mass Spectrometersmentioning

confidence: 99%

“…Direct detection of such heavy particles with the proposed spectrometers will be impossible. Only the detection of corresponding VOCs will be possible, while small particles such as VOCs, according to the results of numerical modelling of the spread of particles in Enceladus plumes [44], will spread uniformly throughout the plume volume. Therefore, the proposed for scientific orbits altitudes in the range of 50 km [34,39,42] are accurate.…”

Section: Mass Spectrometersmentioning

confidence: 99%

Proposed Tasks of Enceladus Missions’ Instrumentation in the Context of Their Astrobiological Goals

Kubiak¹,

Kotlarz²,

Zalewska³

et al. 2020

PAR

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Enceladus, Saturnian satellite, is a very significant object for astrobiologists due to the presence of liquid water that forms the ice-covered ocean. Water ice geysers escape from the south pole region through cracks in the ice shield. During the Cassini flight, the probe took samples of plumes matter recognizing besides other methane and molecular hydrogen. Since then, hypotheses have been formulated that life forms similar to those found in the Lost City Hydrothermal Field in the Atlantic ocean bottom may occur near Enceladus’ hydrothermal chimneys. In our work, we analyzed the possibility of a microbial factor detection in the Enceladus geysers. We used as model organisms selected extremophiles. We investigated multi-spectral cameras and mass spectrometers intended for use in mission proposals to Enceladus: Enceladus Orbiter, Enceladus Life Finder, The Explorer of Enceladus and Titan and THEO mission. The review pointed that the configuration of mass spectrometers and the proposed parameters of scientific orbits are appropriate for detecting volatile organic compounds corresponding to selected microorganisms such as aldehyde, ethanol, benzene, toluene, indole, or violacein. The possible presence of a microbiological component with physical dimensions in the order of several micrometres can only be observed for areas of geyser formation at their higher density (> 10 ppm) and with the occurrence of the “snowing microbes” phenomenon. We have found that particularly useful optical channels are 780–975 nm, 860–910 nm, and 5.0–5.3 µm.

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