2005ApJ...630..637K

Query : 2005ApJ...630..637K

2005ApJ...630..637K - Astrophys. J., 630, 637-641 (2005/September-1)

Laboratory synthesized calcium oxide and calcium hydroxide grains: a candidate to explain the 6.8 µm band.

KIMURA Y. and NUTH III J.A.

Abstract (from CDS):

We demonstrate that CaO and Ca(OH)2are excellent candidates to explain the 6.8 µm feature, which is one of the most obscure features in young stellar objects. We discuss the condensation of CaO grains and the potential formation of a Ca(OH)2surface layer. The infrared spectra of these grains are compared with the spectra of 15 young stellar objects. We note that CaO-rich grains are seen in all meteoritic CAIs (calcium-aluminum-rich inclusions) and that the 6.8 µm feature has only been observed in young stellar objects. Therefore, we consider CaO grains to be a plausible candidate to explain the 6.8 µm feature and hypothesize that they are produced in the hot interiors of young stellar environments.

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Journal keyword(s): Astrochemistry - ISM: Molecules - Methods: Laboratory - Molecular Data

Simbad objects: 19

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Number of rows : 19
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME W 3 IRS 5 Cluster Cl* 02 25 42 +62 06.1           ~ 81 1
2 V* V2254 Ori Or* 05 35 14.11296 -05 22 22.7316           B 315 2
3 [RLK73] IRc 2 IR 05 35 14.51548 -05 22 30.5943           ~ 641 1
4 NAME Mon R2 IRS 2 * 06 07 45.83 -06 22 53.5           B0 111 0
5 NAME Mon R2 IRS IR 06 07 46.1 -06 23 07           ~ 8 2
6 NAME Mon R2 HII 06 07 47.58 -06 22 42.6           ~ 742 2
7 NAME Mon R2 IRS 3 Y*O 06 07 47.8 -06 22 55           ~ 142 0
8 RAFGL 989 Y*O 06 41 10.1587451112 +09 29 33.635220144   17.4 16.8 18.26 17.28 B2 266 0
9 Elia 2-29 Y*O 16 27 09.43032 -24 37 18.7716           ~ 283 1
10 W 33a Y*O 18 14 39.56547 -17 52 02.2260           ~ 698 0
11 RAFGL 2136 Y*O 18 22 26.52888 -13 30 14.0400           ~ 285 0
12 RAFGL 7009S HII 18 34 20.911 -05 59 42.23           ~ 214 0
13 V* V710 CrA Or* 19 01 50.67792 -36 58 09.6132           K7: 125 0
14 RAFGL 2591 Y*O 20 29 24.8230 +40 11 19.590           ~ 622 0
15 SH 2-140 OpC 22 19 07.8 +63 17 07           ~ 658 2
16 IRAS 22176+6303 Y*O 22 19 18.23 +63 18 47.5           ~ 595 0
17 NGC 7538 OpC 23 13 37 +61 30.0           ~ 881 1
18 [WBN74] NGC 7538 IRS 1 Y*O 23 13 45.318 +61 28 11.69           ~ 414 3
19 IRAS 23118+6110 Y*O 23 14 02.09473 +61 27 18.8460           ~ 376 0

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