Far-ultraviolet imaging of the globular cluster ngc 7099 with the second wide-field and planetary camera

Jeremy R. Mould, Alan M. Watson, John S. Gallagher, Gilda E. Ballester, Christopher J. Burrows, Stefano Casertano, John T. Clarke, David Crisp, Richard E. Griffiths, J. Jeff Hester, John G. Hoessel, Jon A. Holtzman, Paul A. Scowen, Karl R. Stapelfeldt, John T. Trauger, James A. Westphal

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

We have imaged the globular cluster NGC 7099 in the far-UV and visible with WFPC2 on the Hubble Space Telescope. Our far-UV images show a sparsely populated and fully resolved central region. The far-UV to visible color-magnitude diagram of these stars shows a well-defined horizontal branch with no evidence for hot, more evolved descendants. We find one hot horizontal branch star; the center of the cluster harbors four luminous blue stragglers. Far-UV images do not show any singularly steep density gradient at small radii among the horizontal branch stars of this post-core-collapse cluster.

Original languageEnglish (US)
Pages (from-to)762-766
Number of pages5
JournalAstrophysical Journal
Volume461
Issue number2 PART I
DOIs
StatePublished - 1996

Keywords

  • Globular clusters: individual (NGC 7099)
  • Stars: evolution
  • Stars: horizontal-branch
  • Ultraviolet: stars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Far-ultraviolet imaging of the globular cluster ngc 7099 with the second wide-field and planetary camera'. Together they form a unique fingerprint.

  • Cite this

    Mould, J. R., Watson, A. M., Gallagher, J. S., Ballester, G. E., Burrows, C. J., Casertano, S., Clarke, J. T., Crisp, D., Griffiths, R. E., Jeff Hester, J., Hoessel, J. G., Holtzman, J. A., Scowen, P. A., Stapelfeldt, K. R., Trauger, J. T., & Westphal, J. A. (1996). Far-ultraviolet imaging of the globular cluster ngc 7099 with the second wide-field and planetary camera. Astrophysical Journal, 461(2 PART I), 762-766. https://doi.org/10.1086/177100