The Star-Forming Region in Orion KL

L. I. Matveyenko; K. M. Zakharin; P. J. Diamond; D. A. Graham

doi:10.1134/1.1615331

The Star-Forming Region in Orion KL

L. I. Matveyenko, K. M. Zakharin, P. J. Diamond, D. A. Graham

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Abstract

We have studied the fine structure of the active H2O supermaser emission region in Orion KL with an angular resolution of 0.1 mas. We found central features suggestive of a bipolar outflow, bullets, and an envelope which correspond to the earliest stage of low-mass star formation. The ejector is a bright compact source ≤0.05 AU in size with a brightness temperature Tb ≅ 1017 K. The highly collimated bipolar outflow ∼30 has a velocity vej ≅ 10 km s-1, a rotation period of ∼0.5 yr, a precession period of ∼10 yr, and a precession angle of ∼33°. Precession gives rise to a jet in the shape of a conical helix. The envelope amplifies the radio emission from the components by about three orders of magnitude at a velocity = 7.65 km s-1. © 2003 MAIK "Nauka/Interperiodica".

Original language	English
Pages (from-to)	641-643
Number of pages	2
Journal	Astronomy Letters
Volume	29
Issue number	10
DOIs	https://doi.org/10.1134/1.1615331
Publication status	Published - Oct 2003

Keywords

Accretion disks
Maser emission
Star formation

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title = "The Star-Forming Region in Orion KL",

abstract = "We have studied the fine structure of the active H2O supermaser emission region in Orion KL with an angular resolution of 0.1 mas. We found central features suggestive of a bipolar outflow, bullets, and an envelope which correspond to the earliest stage of low-mass star formation. The ejector is a bright compact source ≤0.05 AU in size with a brightness temperature Tb ≅ 1017 K. The highly collimated bipolar outflow ∼30 has a velocity vej ≅ 10 km s-1, a rotation period of ∼0.5 yr, a precession period of ∼10 yr, and a precession angle of ∼33°. Precession gives rise to a jet in the shape of a conical helix. The envelope amplifies the radio emission from the components by about three orders of magnitude at a velocity = 7.65 km s-1. {\textcopyright} 2003 MAIK {"}Nauka/Interperiodica{"}.",

keywords = "Accretion disks, Maser emission, Star formation",

author = "Matveyenko, {L. I.} and Zakharin, {K. M.} and Diamond, {P. J.} and Graham, {D. A.}",

year = "2003",

month = oct,

doi = "10.1134/1.1615331",

language = "English",

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journal = "Astronomy Letters",

issn = "1562-6873",

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TY - JOUR

T1 - The Star-Forming Region in Orion KL

AU - Matveyenko, L. I.

AU - Zakharin, K. M.

AU - Diamond, P. J.

AU - Graham, D. A.

PY - 2003/10

Y1 - 2003/10

N2 - We have studied the fine structure of the active H2O supermaser emission region in Orion KL with an angular resolution of 0.1 mas. We found central features suggestive of a bipolar outflow, bullets, and an envelope which correspond to the earliest stage of low-mass star formation. The ejector is a bright compact source ≤0.05 AU in size with a brightness temperature Tb ≅ 1017 K. The highly collimated bipolar outflow ∼30 has a velocity vej ≅ 10 km s-1, a rotation period of ∼0.5 yr, a precession period of ∼10 yr, and a precession angle of ∼33°. Precession gives rise to a jet in the shape of a conical helix. The envelope amplifies the radio emission from the components by about three orders of magnitude at a velocity = 7.65 km s-1. © 2003 MAIK "Nauka/Interperiodica".

AB - We have studied the fine structure of the active H2O supermaser emission region in Orion KL with an angular resolution of 0.1 mas. We found central features suggestive of a bipolar outflow, bullets, and an envelope which correspond to the earliest stage of low-mass star formation. The ejector is a bright compact source ≤0.05 AU in size with a brightness temperature Tb ≅ 1017 K. The highly collimated bipolar outflow ∼30 has a velocity vej ≅ 10 km s-1, a rotation period of ∼0.5 yr, a precession period of ∼10 yr, and a precession angle of ∼33°. Precession gives rise to a jet in the shape of a conical helix. The envelope amplifies the radio emission from the components by about three orders of magnitude at a velocity = 7.65 km s-1. © 2003 MAIK "Nauka/Interperiodica".

KW - Accretion disks

KW - Maser emission

KW - Star formation

U2 - 10.1134/1.1615331

DO - 10.1134/1.1615331

M3 - Article

SN - 1562-6873

VL - 29

SP - 641

EP - 643

JO - Astronomy Letters

JF - Astronomy Letters

IS - 10

ER -

The Star-Forming Region in Orion KL

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Keywords

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