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research article

Detection Of Vibrationally Excited Co In Irc+10216

Patel, Nimesh A.
•
Young, Ken H.
•
Bruenken, Sandra
Show more
2009
The Astrophysical Journal Letters

Using the Submillimeter Array we have detected the J = 3-2 and 2-1 rotational transitions from within the first vibrationally excited state of CO toward the extreme carbon star IRC+10216 (CW Leo). The emission remains spatially unresolved with an angular resolution of similar to 2 '' and, given that the lines originate from energy levels that are similar to 3100 K above the ground state, almost certainly originates from a much smaller (similar to 10(14) cm) sized region close to the stellar photosphere. Thermal excitation of the lines requires a gas density of similar to 10(9) cm(-3), about an order of magnitude higher than the expected gas density based on previous infrared observations and models of the inner dust shell of IRC+10216.

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Type
research article
DOI
10.1088/0004-637X/691/1/L55
Web of Science ID

WOS:000263148600013

Author(s)
Patel, Nimesh A.
Young, Ken H.
Bruenken, Sandra
Menten, Karl M.
Thaddeus, Patrick
Wilson, Robert W.
Date Issued

2009

Published in
The Astrophysical Journal Letters
Volume

691

Start page

L55

End page

L58

Subjects

circumstellar matter

•

radio lines: stars

•

stars: individual (IRC+10216)

•

stars: late-type

•

submillimeter

•

Late-Type Stars

•

Maser Emission

•

Sio Masers

•

Irc &10216

•

Excitation

•

Envelope

•

Ghz

•

C4H

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
ISIC  
Available on Infoscience
November 30, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/60504
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