STARDUST: Finessing expensive cometary sample returns

Brownlee, D. E.; Tsou, P.; Atkins, K. L.; Yen, Chen‐Wan L.; Vellinga, J. M.; Price, S. D.; Clark, Carl

doi:10.1016/s0094-5765(96)00122-1

Cited by 19 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…the aggregate of <100 nm Fo 83 grains, presumably of Type II supernova origin (Messenger, Keller & Lauretta 2005). Mg-rich olivines have also been found in Comet Wild 2 dust obtained by the Stardust mission (Brownlee et al 2006b). The first crystalline silicates to be discovered were all Mg-rich (see Malfait et al 1998;Tielens et al 1998; van den Ancker, Bouwman & Wesselius 2000;Meeus et al 2001;Draine 2003;Henning, Mutschke & Jäger 2005;Molster & Kemper 2005 and references therein); however, evidence for Fe-containing cosmic silicates exists as well.…”

Section: Olivine and Crystalline Silicates In Astronomical Environmentsmentioning

confidence: 87%

Infrared laboratory absorbance spectra of olivine: using classical dispersion analysis to extract peak parameters

Pitman

Dijkstra

Hofmeister³

et al. 2010

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

Laboratory measurements quantifying the effect of Fe substituting for Mg in olivine are needed to distinguish compositional from temperature, grain size and grain shape effects in observational data. To address this need, we study room temperature absorption spectra of a large suite of olivines evenly spaced across Mg and Fe compositions. We apply the principle that classical dispersion theory may be used to determine peak positions as well as peak widths, strengths and possibly optical function (n(λ) and k(λ)) estimates from absorption spectra of thin film samples of these olivines and two additional isotropic and anisotropic minerals with varying hardness and numbers of spectral bands. For olivine, we find that this method provides good estimates of peak position and that accounting for asymmetric peak shapes in this way increases the error on full width at half‐maximum and oscillator strengths. Values from classical dispersion fits better match published n and k derived from reflectivity of single crystals when the dust proxy is soft and the thickness of the sample is independently constrained. Electronic data and peak parameter trends for the laboratory olivine absorption spectra and the viability of the extracted n and k are discussed with regard to astronomy.

show abstract

Section: Olivine and Crystalline Silicates In Astronomical Environmentsmentioning

confidence: 87%

Infrared laboratory absorbance spectra of olivine: using classical dispersion analysis to extract peak parameters

Pitman

Dijkstra

Hofmeister³

et al. 2010

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

show abstract

“…2004). The Stardust mission, which was launched in 1999, traveled to comet Wild 2, collected particles from the coma of the comet in low‐density silica aerogel, and returned the samples to Earth in 2006 (Brownlee et al. 1996, 2006; Tsou et al.…”

Section: Introductionmentioning

confidence: 99%

“…Since that time many groups have carried out extensive studies of the effectiveness of aerogels as hypervelocity capture media (Burchell et al 1999;Ho¨rz et al 2000;Kitazawa et al 1999;Okudairi et al 2004). The Stardust mission, which was launched in 1999, traveled to comet Wild 2, collected particles from the coma of the comet in low-density silica aerogel, and returned the samples to Earth in 2006 (Brownlee et al 1996Tsou et al 2003). The mission design was based on the fact that low density silica aerogel can decelerate and stop hypervelocity particles with minimal damage to the particle in the process, as compared with other capture media.…”

Section: Introductionmentioning

confidence: 99%

Non-silica aerogels as hypervelocity particle capture materials

Jones¹

2010

Meteoritics and Planetary Science

View full text Add to dashboard Cite

Abstract-The Stardust sample return mission to the comet Wild 2 used silica aerogel as the principal cometary and interstellar particle capture and return medium. However, since both cometary dust and interstellar grains are composed largely of silica, using a silica collector complicates the science that can be accomplished with these particles. The use of non-silica aerogel in future extra-terrestrial particle capture and return missions would expand the scientific value of these missions. Alumina, titania, germania, zirconia, tin oxide, and resorcinol ⁄ formaldehyde aerogels were produced and impact tested with 20, 50, and 100 lm glass microspheres to determine the suitability of different non-silica aerogels as hypervelocity particle capture mediums. It was found that non-silica aerogels do perform as efficient hypervelocity capture mediums, with alumina, zirconia, and resorcinol ⁄ formaldehyde aerogels proving to be the best of the materials tested.

show abstract

“…Launched from the Kennedy Space Center in 1999, the function of the mission was to carry a hypervelocity particle collector which would meet up with a known outer solar system body (Comet 81P/Wild 2) to capture coma samples and interstellar dust to be brought on Earth for laboratory analysis [108][109][110].…”

Section: Hypervelocity Particle Capturementioning

confidence: 99%

Flexible and Transparent Silica Aerogels: An Overview

Parale¹,

Lee²,

Park³

2017

J. Korean Ceram. Soc

View full text Add to dashboard Cite

Aerogels are highly porous structures prepared via a sol-gel process and supercritical drying technology. Among the classes of aerogels, silica aerogel exhibits the most remarkable physical properties, possessing lower density, thermal conductivity, refractive index, and dielectric constant than any solids. Its acoustical property is such that it can absorb the sound waves reducing speed to 100 m/s compared to 332 m/s for air. However, when it comes to commercialization, the result is not as expected. It seems that mass production, particularly in the aerospace industry, has dawdled behind. This paper highlights the evolution of aerogels in general and discusses the functions and significances of silica aerogel in previous astronautical applications. Future outer-space applications have been proposed as per the current research trend. Finally, the implementation of conventional silica aerogel in aeronautics is argued with an alternative known as Maerogel.

show abstract

STARDUST: Finessing expensive cometary sample returns

Cited by 19 publications

References 6 publications

Infrared laboratory absorbance spectra of olivine: using classical dispersion analysis to extract peak parameters

Infrared laboratory absorbance spectra of olivine: using classical dispersion analysis to extract peak parameters

Non-silica aerogels as hypervelocity particle capture materials

Flexible and Transparent Silica Aerogels: An Overview

Contact Info

Product

Resources

About