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

doi:10.1111/j.1365-2966.2008.13898.x

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 journal › Article › peer-review

11 Scopus citations

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)
Pages (from-to)	84-94
Number of pages	11
Journal	Monthly Notices of the Royal Astronomical Society
Volume	391
Issue number	1
DOIs	https://doi.org/10.1111/j.1365-2966.2008.13898.x
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

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title = "Lynds 1622: A nearby star-forming cloud projected on Orion B?",

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.",

keywords = "ISM: clouds, ISM: individual: L 1622, Stars: formation, Stars: pre-main-sequence",

author = "M. Kun and Z. Balog and N. Mizuno and A. Kawamura and A. G{\'a}sp{\'a}r and Kenyon, {S. J.} and Y. Fukui",

year = "2008",

month = nov,

doi = "10.1111/j.1365-2966.2008.13898.x",

language = "English (US)",

volume = "391",

pages = "84--94",

journal = "Monthly Notices of the Royal Astronomical Society",

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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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Lynds 1622: A nearby star-forming cloud projected on Orion B?

Abstract

Keywords

ASJC Scopus subject areas

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