Two-soft X-ray images of the Chamaeleon I star forming cloud obtained with the ROSAT Position Sensitive Proportional Counter (PSPC) are presented. Seventy reliable, and perhaps 19 additional, X-ray sources are found. Up to Ninety percent of these sources are certainly or probably identified with T Tauri stars formed in the cloud. Twenty to 35 are probably previously unrecognized 'weak' T Tauri (WTT) stars. T Tauri X-ray luminosities range from log bar-L(sub x) less than 28.8 to 31.1 erg/s, or 10(exp 2) - 10(exp 4) times solar levels, with mean value of log bar-L(sub x) = 10(exp 29.2) erg/s in the 0.2-2.5 keV band. The X-ray luminosities of well-studied Chamaeleon cloud members are correlated with a complex of four stellar properties: effective temperature, mass, radius and bolometric luminosity. The spatial distribution, Hertzsprung-Russell (H-R) diagram locations of the stars indicate WTT and CTT are coeval. The total premain sequence population of the cloud is likely to be greater than 100 stars, with WTT stars outnumbering 'classical' T Tauri (CTT) stars by approximately 2:1.


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    Titel :

    ROSAT observations of the Chamaeleon star forming cloud


    Beteiligte:
    Feigelson, E. D. (Autor:in) / Casanova, S. (Autor:in) / Montmerle, T. (Autor:in) / Guibert, J. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.12.1993



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    ROSAT observations of the Chamaeleon star forming cloud

    Feigelson, E.D. / Casanova, S. / Montmerle, T. et al. | Elsevier | 1993


    ROSAT Observations of the Chamaeleon Star Forming Cloud

    Feigelson, E. D. / Casanova, S. / Montmerle, T. et al. | British Library Conference Proceedings | 1993


    ROSAT Observations of the Chamaeleon Star Forming Cloud

    Feigelson, E.D. | Online Contents | 1993


    ROSAT observations in star forming regions

    Krautter, J. | British Library Online Contents | 1992


    XMM-Newton Survey of the Chamaeleon I Star Forming Region

    Telleschi, A. / Gudel, M. / Briggs, K. et al. | British Library Conference Proceedings | 2005