TY - JOUR
T1 - Lynds 1622
T2 - A nearby star-forming cloud projected on Orion B?
AU - Kun, M.
AU - Balog, Z.
AU - Mizuno, N.
AU - Kawamura, A.
AU - Gáspár, A.
AU - Kenyon, S. J.
AU - Fukui, Y.
PY - 2008/11
Y1 - 2008/11
N2 - 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.
AB - 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.
KW - ISM: clouds
KW - ISM: individual: L 1622
KW - Stars: formation
KW - Stars: pre-main-sequence
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U2 - 10.1111/j.1365-2966.2008.13898.x
DO - 10.1111/j.1365-2966.2008.13898.x
M3 - Article
AN - SCOPUS:55849088734
SN - 0035-8711
VL - 391
SP - 84
EP - 94
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 1
ER -