New low-mass stars and brown dwarfs with disks in the Chamaeleon i star-forming region

K. L. Luhman, A. A. Muench

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

We have used images obtained with the Infrared Array Camera and the Multiband Imaging Photometer on board the Spitzer Space Telescope to search for low-mass stars and brown dwarfs with circumstellar disks in the Chamaeleon I star-forming region. Through optical spectroscopy of sources with red colors in these data, we have identified seven new disk-bearing members of the cluster. Three of these objects are probably brown dwarfs, according to their spectral types (M8, M8.5, M8-L0). Three of the other new members may have edge-on disks, based on the shapes of their infrared spectral energy distributions. One of the possible edge-on systems has a steeply rising slope from 4.5 to 24 μm, indicating that it could be a Class I source (star+disk+envelope) rather than a Class II source (star+disk). If so, then it would be one of the least massive known Class I protostars (M5.75, M ∼ 0.1 Ṁ).

Original languageEnglish (US)
Pages (from-to)654-662
Number of pages9
JournalAstrophysical Journal
Volume684
Issue number1
DOIs
StatePublished - Sep 1 2008

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'New low-mass stars and brown dwarfs with disks in the Chamaeleon i star-forming region'. Together they form a unique fingerprint.

  • Cite this