学科筛选

  • 3. Thin and thick Galactic disks

  • 【来源】

    [外文会议]

  • 【作者】

    Poul E. Nissen 

  • 【摘要】

    Studies of elemental abundances in stars belonging to the thin and the thick disk of our Galaxy are reviewed. Edvardsson et al. (1993) found strong evidence of [rv/Fe] variations among F and G main se...

  • 12. Molecules in the interstellar medium

  • 【来源】

    [外文会议]

  • 【作者】

    Tommy Wiklind 

  • 【摘要】

    The molecular component of the interstellar medium contains more than 120 molecular species and represent the coldest, densest, and most obscured part of the interstellar gas. Molecules are the only p...

  • 13. Models of chemical evolution

  • 【来源】

    [外文会议]

  • 【作者】

    Francesca Matteucci 

  • 【摘要】

    The basic principles underlying galactic chemical evolution and the most important results of chemical evolution models are discussed. In particular, the chemical evolution of the Milky Way galaxy, fo...

  • 15. Metal ejection by Galactic winds

  • 【来源】

    [外文会议]

  • 【作者】

    Crystal L. Martin 

  • 【摘要】

    The development of high-resolution X-ray spectral imaging has made it possible to constrain the metal content of hot galactic winds and to explore the relationship between cold, warm, and hot gas in g...

  • 16. Interstellar dust

  • 【来源】

    [外文会议]

  • 【作者】

    B. T. Draine 

  • 【摘要】

    In the interstellar medium of the Milky Way, certain elements (e.g., Mg, Si, Al, Ca, Ti, and Fe) reside predominantly in interstellar dust grains. These grains absorb, scatter, and emit electromagneti...

  • 17. Interstellar atomic abundances

  • 【来源】

    [外文会议]

  • 【作者】

    Edward B. Jenkins 

  • 【摘要】

    A broad array of interstellar absorption features that appear in the ultraviolet spectra of bright sources allows us to measure the abundances and ionization states of many important heavy elements th...

  • 18. Intergalactic medium abundances

  • 【来源】

    [外文会议]

  • 【作者】

    Robert F. Carswell 

  • 【摘要】

    Galaxies at high redshifts will enrich the intergalactic medium with heavy elements through winds and supernova ejecta, and QSO absorption lines provide the most useful means of examining the evolutio...

  • 20. Extremely metal-poor stars

  • 【来源】

    [外文会议]

  • 【作者】

    John E. Norris 

  • 【摘要】

    The discovery and analysis of extremely metal-poor stars have led to increasing insight into conditions when the Universe and Galaxy were young. We present the rationale for studying such objects, wit...

  • 32条记录,
  • 共2页
  • 下页
  • 末页
  • / 2跳转

年度命中数

的趋势