Ultra-high resolution Ca II observations of the LISM

  • Barry Y. Welsh
  • Rosine Lallement
  • Ian Crawford
UV And Soft X-Ray Observations Of The LISM
Part of the Lecture Notes in Physics book series (LNP, volume 506)

Abstract

We report on the status of a long-term program of mapping the velocity structure of the local ISM using ultra-high resolution observations of CaII K-line absorption towards nearby B and A-type stars. Absorption components common to the local interstellar cloud (LIC) have been detected in many (but not all) lines-of-sight. Our preliminary results indicate that the local ISM has a complex velocity pattern of inhomogeneous absorption, indicative of a shocked filamentary nature.

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Copyright information

© Springer-Verlag 1998

Authors and Affiliations

  • Barry Y. Welsh
    • 1
  • Rosine Lallement
    • 2
  • Ian Crawford
    • 3
  1. 1.Eureka ScientificOaklandUSA
  2. 2.Service d’Aeronomie du CNRSVerrieres le BuissonFrance
  3. 3.University College LondonLondonEngland

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