Lynds 1622

A nearby star-forming cloud projected on Orion B?

M. Kun, Z. Balog, N. Mizuno, A. Kawamura, A. Gáspár, S. J. Kenyon, Y. Fukui

Research output: Contribution to journalArticle

7 Citations (Scopus)

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 languageEnglish
Pages (from-to)84-94
Number of pages11
JournalMonthly Notices of the Royal Astronomical Society
Volume391
Issue number1
DOIs
Publication statusPublished - Nov 2008

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pre-main sequence stars
stars
Hertzsprung-Russell diagram
spectral energy distribution
star formation
diagram
luminosity
energy
temperature

Keywords

  • ISM: clouds
  • ISM: individual: L 1622
  • Stars: formation
  • Stars: pre-main-sequence

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Lynds 1622 : A nearby star-forming cloud projected on Orion B? / Kun, M.; Balog, Z.; Mizuno, N.; Kawamura, A.; Gáspár, A.; Kenyon, S. J.; Fukui, Y.

In: Monthly Notices of the Royal Astronomical Society, Vol. 391, No. 1, 11.2008, p. 84-94.

Research output: Contribution to journalArticle

Kun, M, Balog, Z, Mizuno, N, Kawamura, A, Gáspár, A, Kenyon, SJ & Fukui, Y 2008, 'Lynds 1622: A nearby star-forming cloud projected on Orion B?', Monthly Notices of the Royal Astronomical Society, vol. 391, no. 1, pp. 84-94. https://doi.org/10.1111/j.1365-2966.2008.13898.x
Kun, M. ; Balog, Z. ; Mizuno, N. ; Kawamura, A. ; Gáspár, A. ; Kenyon, S. J. ; Fukui, Y. / Lynds 1622 : A nearby star-forming cloud projected on Orion B?. In: Monthly Notices of the Royal Astronomical Society. 2008 ; Vol. 391, No. 1. pp. 84-94.
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AU - Gáspár, A.

AU - Kenyon, S. J.

AU - Fukui, Y.

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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.

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