A far infrared view of low mass star formation in the Cederblad 110 nebula of Chamaeleon I

Free access article

Issue		A&A Volume 367, Number 1, February III 2001


Page(s)		311 - 320
Section		Diffuse matter in space
DOI		http://dx.doi.org/10.1051/0004-6361:20000401

A&A 367, 311-320 (2001)
DOI: 10.1051/0004-6361:20000401

A far infrared view of low mass star formation in the Cederblad 110 nebula of Chamaeleon I

K. Lehtinen¹, L. K. Haikala^{1, 2}, K. Mattila¹ and D. Lemke³

¹ Observatory, Tähtitorninmäki, PO Box 14, 00014 University of Helsinki, Finland
² Swedish-ESO Submillimetre Telescope, European Southern Observatory, Casilla 19001, Santiago, Chile
³ Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany

(Received 28 June 2000 / Accepted 22 November 2000)

Abstract
The Cederblad 110 reflection nebula contains several young stellar objects previously discovered by IRAS and sub-mm observations. This cluster was revisited with ISO's FIR cameras and mapped with higher spatial resolution. All sources were also mapped for the first time near the maximum of their spectral energy distribution at 200 $\mu$ m. In addition, two new FIR-sources were discovered. The new data enabled parameters of the young objects to be determined, such as their luminosity, temperature and mass of the circumstellar dust. These parameters were related to the YSO classes of the various objects ranging from the pure protostar Class O to Class III. Cederblad 110 can be viewed as a compact volume of active low mass star formation in a dense ridge of molecular gas of the Chamaeleon I cloud detected e.g. in HN¹³C and C¹⁸O lines. The star formation efficiency in the 0.001 pc³ cluster volume is high; about 20% of the gas is now bound into stars.

Key words: stars: formation -- ISM: clouds -- ISM: individual objects: Cederblad 110, IRAS 11048-7706, IRAS 11051-7706, IRAS 11057-7706

Offprint request: K. Lehtinen, kimmo.lehtinen@helsinki.fi

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