1999A&A...351..292T

Query : 1999A&A...351..292T

1999A&A...351..292T - Astronomy and Astrophysics, volume 351292-302 (1999/11-1)

Ices and extinction through the Taurus and Ophiuchus clouds.

TEIXEIRA T.C. and EMERSON J.P.

Abstract (from CDS):

A detailed intercomparison is made between published observations of H2 O and CO ices towards the Taurus and Ophiuchus dark clouds. The column densities of the ices are intercompared, and each compared to the visual extinction through the clouds, Av. It is neither clear that the two clouds have different or well defined threshold extinctions for the survival of ice mantles, nor that, for each of the clouds, the thresholds for the survival of CO and H2 O mantles are different. The inclusion of new objects in Taurus (Teixeira et al., 1998A&A...330..711T) introduces a large scatter in the relations between those quantities relative to results obtained by previous authors. Lines-of-sight towards deeply embedded Young Stellar Objects in Taurus appear to show an enhancement in the amount of water-ice relative to lines-of-sight towards field stars behind that cloud. While for Av<14mag there is a tight correlation between the water-ice column density, Ns(H2O), and Av, the inclusion of those new objects reveals a discontinuity in the relation between Ns(H2O) and Av. The interpretation of this discontinuity is discussed.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - ISM: clouds - ISM: dust, extinction - ISM: molecules - infrared: ISM: lines and bands

Simbad objects: 49

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Number of rows : 49
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 LDN 1489 DNe 04 04 47.5 +26 19 42           ~ 238 0
2 V* V892 Tau Ae* 04 18 40.6157618376 +28 19 15.625058880   16.6 14.69 14.35   A0Ve 324 0
3 IRAS 04204+2453 * 04 23 24.5443429272 +25 00 08.378484804           K2III 36 0
4 LDN 1524 DNe 04 27 57.7 +24 39 18           ~ 87 0
5 IRC +20082 OH* 04 29 07.6303239624 +24 43 50.048839668   20.57 17.37   10.45 M8III 78 0
6 V* GV Tau TT* 04 29 23.7314758308 +24 33 00.216011716 19.20         K7 288 0
7 RAFGL 5123 Y*O 04 31 34.07736 +18 08 04.9020           K3V/M3III 900 0
8 V* HL Tau Or* 04 31 38.5107609312 +18 13 57.859747968   15.89 14.49 14.39   K5 1546 0
9 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 797 0
10 2MASS J04314444+1808315 Y*O 04 31 44.44680 +18 08 31.5384           ~ 173 0
11 IRAS 04292+2427 LP? 04 32 11.5400845080 +24 33 37.996211736           K2III 19 0
12 Haro 6-13 Or* 04 32 15.4174258632 +24 28 59.577717108 19.22   17.7     M0 233 1
13 IRAS 04303+2240 Or* 04 33 19.0778932752 +22 46 34.130048412           M0.5 88 0
14 2MASS J04332594+2615334 * 04 33 25.9439459304 +26 15 33.351038280           K2III 44 0
15 HD 28975 * 04 34 50.1719512104 +24 14 40.277039064   9.70 9.0     A2 46 0
16 HD 283701 * 04 34 54.9740171088 +27 12 11.277228744   10.44 9.6     A5 29 0
17 [TNS87] 2 * 04 37 28.2205571712 +26 10 28.981804476           M0 13 0
18 2MASS J04385827+2631084 LP* 04 38 58.2803231016 +26 31 08.569637184       15.60   M5III 14 0
19 Kim 1-36 * 04 39 26.8 +25 53 00           M2III 26 0
20 IRAS 04365+2535 Y*O 04 39 35.19360 +25 41 44.7252           ~ 330 0
21 Kim 1-38 * 04 39 38.8654791216 +26 11 26.646511596           K1III 136 0
22 Elia 3-17 LP? 04 39 43.9660183342 +25 16 01.301694742           M5III 8 0
23 IRAS 0437+257P08 Or* 04 39 55.7457478224 +25 45 01.941104988           B5 177 1
24 NAME Tamura 8 * 04 40 57.46 +25 54 13.5           K5 23 0
25 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
26 IRAS 04379+2534 Y*O 04 41 02.7554367888 +25 39 46.971049932 20.18         M3.0III 15 0
27 HD 29647 * 04 41 08.0448698568 +25 59 33.949206132 9.69 9.22 8.31 7.35 6.60 B9IIIpHgMn 217 0
28 HD 283809 * 04 41 24.7252471464 +25 54 48.396346380 12.64 12.0 10.7     B3V 52 0
29 IRAS 04395+2521 AB? 04 42 35.6979410712 +25 27 15.202470816 19.15 16.1       K5III 16 0
30 DO 10700 LP? 04 44 01.6872343776 +25 20 13.792156584   13.19 11.08     M6III 28 0
31 HD 283812 * 04 44 24.9210299331 +25 31 42.390958427   10.24 9.5     A2 55 0
32 Elia 2-15 LP* 16 26 05.7718842552 -24 42 55.053384192           M: 20 0
33 GSS 30 Y*O 16 26 21.38160 -24 23 04.0524           ~ 223 1
34 GSS 32 TT* 16 26 24.0509462472 -24 24 48.095495928       17.81 15.58 K5-K6 115 1
35 Elia 2-24 TT* 16 26 24.0886188024 -24 16 13.448569260   16.3 14.40 15.81 13.97 K6 208 1
36 GSS 35 TT* 16 26 34.1761719864 -24 23 28.283473860     16.53 14.75 12.51 B3 254 1
37 VSSG 30 Y*O 16 26 44.19504 -24 34 48.3492           ~ 138 0
38 GSS 39 Or* 16 26 45.0318401664 -24 23 07.793180124           M0 255 1
39 WL 16 Y*O 16 27 02.33520 -24 37 27.2316           A0-F3 164 0
40 Elia 2-29 Y*O 16 27 09.43032 -24 37 18.7716           ~ 296 1
41 EM* SR 21A TT* 16 27 10.2778380120 -24 19 12.622467720   16.08 14.10     G1 293 1
42 WL 5 TT* 16 27 18.17064 -24 28 52.6800           ~ 91 0
43 WL 6 Y*O 16 27 21.80448 -24 29 53.3616           ~ 116 0
44 Elia 2-32 Y*O 16 27 28.44576 -24 27 21.0348           K6.5 121 1
45 Elia 2-33 Y*O 16 27 30.18024 -24 27 43.3656           M2 125 1
46 Elia 2-35 * 16 27 46.6889966208 -24 23 22.091768952           K5III 26 0
47 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
48 Elia 2-44 LP? 16 33 02.5942109112 -24 22 40.975070880           M4III 13 0
49 Elia 2-47 LP? 16 38 54.7953379032 -24 11 19.912494624           ~ 12 0

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