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Classsification of Pre main sequence(PMS) stars

  1. Nov 20, 2012 #1
    Hello everyone,
    there is a classification of PMS based on color-color diagram as class 0, class I and class II. can some one please explain more about this classification or provide me with some useful link. I am trying to plot color-color diagram of an Open cluster using Wise Band data.
  2. jcsd
  3. Nov 21, 2012 #2


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    That applies to main sequence stars, not protostars.
  4. Nov 21, 2012 #3
    no, its applicable to PMS. see the appendix portion of the paper by Koenig et.al(2012).
  5. Nov 21, 2012 #4

    jim mcnamara

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    @vrinda - please post a better reference - meaning we did not happen to read the paper you have in mind, so how can we read it, too?
  6. Nov 22, 2012 #5


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    This paper?

    Koenig, X. P. and Leisawitz, D. T. and Benford, D. J. and Rebull, L. M. and Padgett, D. L. and Assef, R. J. (2012) Wide-field Infrared Survey Explorer Observations of the Evolution of Massive Star-forming Regions. Astrophysical Journal, 744 (2). p. 130. ISSN 0004-637X

    There is a paper by Koenig (2008) http://arxiv.org/abs/0808.3284 that is referenced by:

    Wide-Field Survey of Emission-line Stars in IC 1396

    Pre-main-sequence population in NGC 1893 region

    Perhaps this is of interest: Introduction to Young Stellar Objects

    Last edited: Nov 22, 2012
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