Submillimetre observations of low-mass cloud cores: forming tiny objects in situ

J S Greaves

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The origin of very low-mass objects such as brown dwarfs and 'isolated planets' is unclear: can they form in-situ from very low-mass cloud cores in a scaled-down version of star formation? Here I discuss methods of detecting and characterising such faint cores using submillimetre-wavelength observations. Some data are presented for the Ophiuchus clouds that strongly suggest there is little division between stars and ultra low-mass objects at the earliest evolutionary stages. Some challenging results have emerged (in the context of current theory), including finding cores of only a few Jupiter masses and a core mass function still rising at the mass detection limit: the implications are briefly discussed.

Original languageEnglish
Pages (from-to)1044-1047
Number of pages4
JournalAstronomische Nachrichten
Volume326
DOIs
Publication statusPublished - 2005

Keywords

  • stars : formation
  • stars : low-mass
  • brown dwarfs
  • submillimetre
  • RHO-OPHIUCHI
  • CLUMP DISTRIBUTION
  • MOLECULAR CLOUD
  • STAR-FORMATION
  • 850 MICRONS

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