Samples of Stars beyond the Solar System: Silicate Grains in Interplanetary Dust

We have identified six circumstellar silicate grains within interplanetary dust particles (IDPs). Their extrasolar origins are demonstrated by their extremely anomalous oxygen isotopic compositions. Three $^{17}O-rich$ grains appear to originate from red giant or asymptotic giant branch stars. One $...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 2003-04, Vol.300 (5616), p.105-108
Hauptverfasser:	Messenger, Scott, Keller, Lindsay P., Stadermann, Frank J., Walker, Robert M., Zinner, Ernst
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomical Phenomena Astronomy Carbon Chemical composition Circumstellar grains Circumstellar shells, clouds, and expanding envelopes. Circumstellar masers Cosmic Dust Dust Earth, ocean, space Exact sciences and technology Gem stones Interplanetary dust Interplanetary gas and dust (including gegenschein and zodiacal light) Interplanetary space Materials Meteorites Meteoroids Meteors, meteoroids and meteor streams Mineralogy Oxygen Oxygen Isotopes Silica Silicates Soil structure Solar System Solar systems Stars Stars & galaxies Stellar characteristics and properties Temperature
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