On the Origin of the Dispersion in the 7Li/6Li Ratio in the ISM

Bibcode
2003PASJ...55..247C
Casuso, Emilio; Beckman, John E.
Bibliographical reference

Publications of the Astronomical Society of Japan, Vol.55, No.1, pp.247-255

Advertised on:
2
2003
Journal
Publications of the Astronomical Society of Japan
Number of authors
2
IAC number of authors
2
Citations
3
Refereed citations
3
Description
Measurements of the 7Li/6Li ratio in the local interstellar medium (ISM) towards o Per and ζ Per by Knauth et al. (2000, AAA 073.131.129) show clouds with a range from near 2 (a value which points to GCR production by spallation or alpha + alpha to near 11 (the solar system value). These values can be very well accounted for within our model of general chemical enrichment of the Galaxy in which a key role is played by the continuing infall of metal-poor extragalactic gas to the Galactic plane, in the form of high-velocity clouds. Within this model, light nuclides are produced in the ISM, but destroyed in dense hot interstellar regions around massive stars, the process of which yields a differential depletion of 6Li relative to 7Li, which can vary on quite short-distance scales.
Type
Refereed
Clouds

It may interest you

  • Refereed
    An ultra-short-period super-Earth with an extremely high density and an outer companion
    We present the discovery and characterization of a new multi-planetary system around the Sun-like star K2-360 (EPIC 201595106). K2-360 was first identified in K2 photometry as the host of an ultra-short-period (USP) planet candidate with a period of 0.88 d. We obtained follow-up transit photometry, confirming the star as the host of the signal
    Livingston, John H. et al.

    Advertised on:

    11
    2024
    Bibcode
    2024NatSR..1427219L
    Citations
    0
  • Refereed
    Neural calibration of imaging Stokes polarimeters
    Current polarimetric calibration techniques derive the instrument modulation matrix by numerically fitting an instrumental model to measurements of a set of calibration Stokes vectors. These techniques are typically limited to an error on the retrieved normalized Stokes Q, U and V parameters, in the $1\times10^{-2}$ to $1\times10^{-3}$ range. This
    Iglesias, F. A. et al.

    Advertised on:

    8
    2024
    Bibcode
    2024BAAA...65..281I
    Citations
    0
  • Refereed
    Model-based identification of solar coronal mass ejections using deep neural networks
    Coronal mass ejections (CMEs) are a major driver of space weather and thus can have important negative technological and social impacts. To assess their geoeffectiveness once they are ejected, it is crucial their prompt identification in coronagraph images. In the last decade, deep neural networks (DNN) have experienced enormous improvements in
    Iglesias, F. A. et al.

    Advertised on:

    8
    2024
    Bibcode
    2024BAAA...65...17I
    Citations
    0