1998A&A...330..711T

Query : 1998A&A...330..711T

1998A&A...330..711T - Astronomy and Astrophysics, volume 330, 711-725 (1998/2-2)

Ice CO-cktails in molecular cloud cores.

TEIXEIRA T.C., EMERSON J.P. and PALUMBO M.E.

Abstract (from CDS):

Spectra of the 4.67µm (2140cm–1) solid-CO absorption feature are presented, towards embedded low mass Young Stellar Objects in nearby molecular cloud cores, mostly in Taurus. The likely composition of the CO-bearing ices is analysed by fitting the observations with laboratory data and the statistical significance of the results is discussed. Excellent fits to the nonpolar component of the CO-ices along the observed lines of sight are produced with irradiated pure CO ices, as previously suggested by Palumbo & Strazzulla (1993A&A...269..568P). It does not seem to be possible, however, to constrain the composition of the polar component by analysis of the CO band only. The possible origin of the ion irradiation is discussed. The implications of the non-uniqueness of the fit on the determination of the abundance ratio between nonpolar and polar CO-ices are noted. Future observations are suggested to discriminate between the different possibilities for the polar component. Predictions are made for the abundance of CO2and methanol in the mantles.

Abstract Copyright: ∼

Journal keyword(s): circumstellar matter - stars: formation - stars: pre-main sequence - ISM: dust, extinction, - ISM: molecules - infrared: ISM: lines and bands

Simbad objects: 27

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Number of rows : 27
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 HH 12 HH 03 28 59.4 +31 20 11           ~ 119 1
2 ASR 114 Y*O 03 29 01.16520 +31 20 24.4140           ~ 74 1
3 V* V512 Per Or* 03 29 03.7578170808 +31 16 03.947525688           M3.5 386 0
4 NAME HH 7-11 FIR 03 29 03.9 +31 16 06           ~ 351 0
5 NGC 1333 OpC 03 29 11.3 +31 18 36           ~ 1450 1
6 NAME Per Region reg 03 37 00.0 +31 15 00           ~ 271 0
7 * omi Per ** 03 44 19.13204 +32 17 17.6929 3.13 3.88 3.83 3.71 3.71 B1III 605 0
8 IRAS 03445+3242 Y*O 03 47 41.603 +32 51 43.79           ~ 201 0
9 IRAS 04016+2610 Y*O 04 04 43.07064 +26 18 56.3904           ~ 259 0
10 LDN 1489 DNe 04 04 47.5 +26 19 42           ~ 228 0
11 IRAS 04239+2436 Y*O 04 26 56.29704 +24 43 35.3280           ~ 155 0
12 LDN 1524 DNe 04 27 57.7 +24 39 18           ~ 83 0
13 2MASS J04314444+1808315 Y*O 04 31 44.44680 +18 08 31.5384           ~ 168 0
14 IRAS 04303+2240 Y*O 04 33 19.0778932752 +22 46 34.130048412           M0.5 77 0
15 NAME [BM89] L1536 DNe 04 33 21.3 +22 44 26           ~ 14 0
16 IRAS 04365+2535 Y*O 04 39 35.19360 +25 41 44.7252           ~ 290 0
17 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4415 0
18 * pi.03 Ori PM* 04 49 50.4112051485 +06 57 40.600622266 3.620 3.630 3.190 2.77 2.51 F6V 571 0
19 LDN 1641 MoC 05 39.0 -07 00           ~ 479 0
20 JCMTSF J054027.4-072732 IR 05 40 27.4 -07 27 33           ~ 11 0
21 RAFGL 5163 Y*O 05 40 27.45024 -07 27 30.0564           ~ 141 1
22 V* FU Ori Or* 05 45 22.3647842544 +09 04 12.291320064   10.72 9.60     F0Iab 813 1
23 V* R Mon Ae* 06 39 09.9542000448 +08 44 09.539482632 10.76 12.46 11.85 10.96 10.25 B8IIIe 515 0
24 V* Z CMa Ae* 07 03 43.1599411656 -11 33 06.209065836 10.51 9.99 8.80     B5/8eq+F5/7 578 3
25 NAME Cyg Complex reg 20 32 +45.0           ~ 601 0
26 V* V1735 Cyg Or* 21 47 20.6628414360 +47 32 03.857457372           ~ 160 0
27 NAME CMa Region reg ~ ~           ~ 45 0

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