The 24 micron view of embedded star formation in NGC 7129

J. Muzerolle, S. T. Megeath, R. A. Gutermuth, L. E. Allen, J. L. Pipher, L. Hartmann, K. D. Gordon, D. L. Padgett, A. Noriega-Crespo, P. C. Myers, G. G. Fazio, G. H. Rieke, E. T. Young, J. E. Morrison, D. C. Hines, K. Y.L. Su, C. W. Engelbracht, K. A. Misselt

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


We present observations of the star formation region NGC 7129 taken with the Multiband Imaging Photometer for Spitzer (MIPS). A significant population of sources, likely pre-main-sequence members of the young stellar cluster, are revealed outside the central photoionization region. Combining Infrared Array Camera (IRAC) and ground-based near-infrared images, we have obtained colors and spectral energy distributions for some 60 objects. The [3.6]-[4.5] versus [8]-[24] color-color plane shows sources clustered at several different loci, which roughly correspond to the archetypal evolutionary sequence Class 0, I, II, and III. We obtain preliminary classifications for 36 objects and find significant numbers of both Class I and II objects. Most of the pre-main-sequence candidates are associated with the densest part of the molecular cloud surrounding the photoionization region, indicating active star formation over a broad area outside the central cluster. We discuss three Class II candidates that exhibit evidence of inner disk clearing, which would be some of the youngest known examples of a transition from accretion to optically thin quiescent disks.

Original languageEnglish (US)
Pages (from-to)379-384
Number of pages6
JournalAstrophysical Journal, Supplement Series
Issue number1
StatePublished - Sep 2004


  • Infrared: stars
  • Open clusters and associations: individual (NGC 7129)
  • Stars: formation
  • Stars: pre-main-sequence

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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