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PROBING FOR EVIDENCE OF PLUMES ON EUROPA WITH HST/STIS

Sparks, W. B. ; Hand, K. P. ; McGrath, M. A. ; Bergeron, E. ; Cracraft, M. ; Deustua, S. E.

The Astrophysical journal, 2016-10, Vol.829 (2), p.121 [Revista revisada por pares]

2230 Support: The American Astronomical Society

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PROBING FOR EVIDENCE OF PLUMES ON EUROPA WITH HST/STIS
Autor: Sparks, W. B. ; Hand, K. P. ; McGrath, M. A. ; Bergeron, E. ; Cracraft, M. ; Deustua, S. E.
Materias: ABSORPTION ; AEROSOLS ; Astronomy ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; DEGASSING ; DETECTION ; DISSOCIATION ; EMISSION ; FAR ULTRAVIOLET RADIATION ; JUPITER PLANET ; LIMBS ; planets and satellites: general ; SATELLITES ; SPACE ; SPECTROSCOPY ; TELESCOPES
Es parte de: The Astrophysical journal, 2016-10, Vol.829 (2), p.121
Notas: AAS00254
The Solar System, Exoplanets, and Astrobiology
2230 Support
NIHMS983684
2230
Descripción: ABSTRACT Roth et al. (2014a) reported evidence for plumes of water venting from a southern high latitude region on Europa: spectroscopic detection of off-limb line emission from the dissociation products of water. Here, we present Hubble Space Telescope direct images of Europa in the far-ultraviolet (FUV) as it transited the smooth face of Jupiter to measure absorption from gas or aerosols beyond the Europa limb. Out of 10 observations, we found 3 in which plume activity could be implicated. Two observations showed statistically significant features at latitudes similar to Roth et al., and the third at a more equatorial location. We consider potential systematic effects that might influence the statistical analysis and create artifacts, and are unable to find any that can definitively explain the features, although there are reasons to be cautious. If the apparent absorption features are real, the magnitude of implied outgassing is similar to that of the Roth et al. feature; however, the apparent activity appears more frequently in our data.
Editor: 2230 Support: The American Astronomical Society
Idioma: Inglés

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PROBING FOR EVIDENCE OF PLUMES ON EUROPA WITH HST/STIS

Sparks, W. B. ; Hand, K. P. ; McGrath, M. A. ; Bergeron, E. ; Cracraft, M. ; Deustua, S. E.

2230 Support: The American Astronomical Society

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