Abstract
We present results of optical spectroscopic and photometric observation of the pre-main-sequence stars associated with the cometary shaped dark cloud Lynds 1622, and 12CO and 13CO observations of the cloud. We determined the effective temperatures and luminosities of 14 pre-main-sequence stars associated with the cloud from their positions in the Hertzsprung-Russell diagram, as well as constructed their spectral energy distributions using optical, 2MASS and Spitzer IRAC and MIPS data. We derived physical parameters of L 1622 from the molecular observations. Our results are not compatible with the assumption that L 1622 lies on the near side of the Orion-Eridanus loop, but suggest that L 1622 is as distant as Orion B. At a distance of 400 pc the mass of the cloud, derived from our 12CO data, is 1100 M⊙, its star formation efficiency is ∼1.8 per cent, and the average age of its low-mass pre-main-sequence star population is about 1 Myr.
Original language | English (US) |
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Pages (from-to) | 84-94 |
Number of pages | 11 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 391 |
Issue number | 1 |
DOIs | |
State | Published - Nov 2008 |
Externally published | Yes |
Keywords
- ISM: clouds
- ISM: individual: L 1622
- Stars: formation
- Stars: pre-main-sequence
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science