These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: An astronomical 2175 angstrom feature in interplanetary dust particles.
    Author: Bradley J, Dai ZR, Erni R, Browning N, Graham G, Weber P, Smith J, Hutcheon I, Ishii H, Bajt S, Floss C, Stadermann F, Sandford S.
    Journal: Science; 2005 Jan 14; 307(5707):244-7. PubMed ID: 15653501.
    Abstract:
    The 2175 angstrom extinction feature is the strongest (visible-ultraviolet) spectral signature of dust in the interstellar medium. Forty years after its discovery, the origin of the feature and the nature of the carrier(s) remain controversial. Using a transmission electron microscope, we detected a 5.7-electron volt (2175 angstrom) feature in interstellar grains embedded within interplanetary dust particles (IDPs). The carriers are organic carbon and amorphous silicates that are abundant in IDPs and in the interstellar medium. These multiple carriers may explain the enigmatic invariant central wavelength and variable bandwidth of the astronomical 2175 angstrom feature.
    [Abstract] [Full Text] [Related] [New Search]