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Cited by 514Astrophysics and Star Formation StudiesStellar, planetary, and galactic studiesGalaxies: Formation, Evolution, Phenomena

The DOI matches its Crossref record; 79 of the 80 references it cites were found in a registry or an index.

A Spitzer Space Telescope Study of Disks in the Young σ Orionis Cluster

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Hernandez, Jesus, Hartmann, L., Megeath, T., Gutermuth, R., Muzerolle, J., Calvet, N., Vivas, A. K., Briceno, C., Allen, L., Stauffer, J., Young, E., Fazio, G.·2007·The Astrophysical Journal
DOI 10.1086/513735
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Abstract

We report new Spitzer Space Telescope observations, using the IRAC and MIPS instruments, of the young (~3 Myr) σ Orionis cluster. We identify 336 stars as members of the cluster, using optical and near-infrared color-magnitude diagrams. Using the spectral energy distribution slopes in the IRAC spectral range, we place objects into several classes: non-excess stars, stars with optically thick disks (such as classical T Tauri stars), class I (protostellar) candidates, and stars with "evolved disks"; the last exhibit smaller IRAC excesses than optically thick disk systems. In general, this classification agrees with the location expected in IRAC-MIPS color-color diagrams for these objects. We find that the evolved disk systems are mostly a combination of objects with optically thick but nonflared disks, suggesting grain growth and/or settling, and transition disks, systems in which the inner disk is partially or fully cleared of small dust. In all, we identify seven transition disk candidates and three possible debris disk systems. As in other young stellar populations, the fraction of disks depends on the stellar mass, ranging from ~10% for stars in the Herbig Ae/Be mass range (>2 M ☉ ) to ~35% for those in the T Tauri mass range (1-0.1 M ☉ ). The IRAC infrared excesses found in stellar clusters and associations with and without central high-mass stars are similar, suggesting that external photoevaporation is not very important in many clusters. Finally, we find no correlation between the X-ray luminosity and the disk infrared excess, suggesting that the X-rays are not strongly affected by disk accretion.

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Research works printed but not linked: 9

  1. Andre, P., Ward-Thompson, D. & Barsony, M. 2000, in Protostars and Planets IV, ed. V. Mannings, A. P. Boss, & S. S. Russell (Tucson: Univ. Arizona Press), 59
  2. Baraffe I., 1998, A&A, 337, 403
  3. Brown A. G. A., 1994, A&A, 289, 101
  4. Brown, A. G. A., Walter, F. M. & Blaauw, A. 2007, in ASP Conf. Ser., The Orion Complex Revisited, ed. M. J. McCaughrean & A. Burkert, in press (astro-ph/9802054) · arXiv
  5. D’Alessio P., 2005, Rev. Mex. AA, 41, 61
  6. Hartmann, L. 2005b, in ASP Conf. Ser. 341, Chondrites and the Protoplanetary Disk, ed. A. N. Krot, E. R. D. Scott, & B. Reipurth (San Francisco: ASP), 131
  7. Kharchenko N. V., 2001, Kinematika Fiz. Nebesnykh Tel., 17, 409
  8. Siess L., 2000, A&A, 358, 593
  9. Walter F. M., 1997, Mem. Soc. Astron. Italiana, 68, 1081

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Metadata

Authors
Hernandez, J., Hartmann, L., Megeath, T., Gutermuth, R., Muzerolle, J., Calvet, N., Vivas, A. K., Briceno, C., Allen, L., Stauffer, J., Young, E., & Fazio, G.
Affiliations
  • University of Michigan (US)
  • Center for Astrophysics Harvard & Smithsonian (US)
  • University of Arizona (US)
  • California Institute of Technology (US)
ORCID
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
2007-06-20
Volume
662
Issue
2
Pages
1067-1081
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
DOI
10.1086/513735
OpenAlex
W2026036168
Cited by
512
References
80
Citations by year
2026: 12 · 2025: 19 · 2024: 18 · 2023: 19 · 2022: 16 · 2021: 20 · 2020: 30 · 2019: 24 · 2018: 52 · 2017: 23 · 2016: 36 · 2015: 19 · 2014: 34 · 2013: 27 · 2012: 26
FWCI
21.55
Type
journal article
Language
en
Open access
Locations
  • The Astrophysical Journal (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysics and Star Formation Studies
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
Keywords
sigma Orionis cluster, protoplanetary disks, young stellar populations, infrared excess, transition disks, debris disks, T Tauri stars, Class I protostars, X-ray luminosity, stellar mass dependence, Herbig Ae/Be stars, cluster membership

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