2007PASJ...59L..47K

Query : 2007PASJ...59L..47K

2007PASJ...59L..47K - Publ. Astron. Soc. Jap., 59, L47-L50 (2007/October-0)

Observation of C8H– toward IRC+10216.

KAWAGUCHI K., FUJIMORI R., AIMI S., TAKANO S., OKABAYASHI E.Y., GUPTA H., BRUNKEN S., GOTTLIEB C.A., McCARTHY M.C. and THADDEUS P.

Abstract (from CDS):

begin{HTML}Five rotational lines of the C8H– ion were observed in the circumstellar envelope of IRC +10216 with the Nobeyama 45m telescope. An improved value of the column density of the C8H radical yielded a [C8H–] / [C8H] ratio of 37% - nearly 4 times larger than the [C6H–] / [C6H] ratio (8.6%) and nearly 1500 times the [C4H–] / [C4H] ratio (0.024%), which may indicate more efficient formation of longer carbon chain anions. The excitation temperature of C8H– (16±2K) derived here is somewhat lower than that of the two smaller anions C6H– (32K) and C4H– (23K) in IRC +10216.

Abstract Copyright: ∼

Journal keyword(s): ISM: molecules - molecular processes - radio lines: stars - stars: circumstellar matter - stars: individual: IRC +10216

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1872 0
2 V* R Leo Mi* 09 47 33.4839808805 +11 25 43.823283729 9.22 8.94 7.53 3.39 0.12 M7-9e 943 1
3 IRC +10216 C* 09 47 57.40632 +13 16 43.5648           C9,5e 2455 0

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