2015A&A...578A..31R


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.14CET14:58:49

2015A&A...578A..31R - Astronomy and Astrophysics, volume 578A, 31-31 (2015/6-1)

Sensitive survey for 13CO, CN, H2CO, and SO in the disks of T Tauri and Herbig Ae stars. II. Stars in ρ Ophiuchi and upper Scorpius.

REBOUSSIN L., GUILLOTEAU S., SIMON M., GROSSO N., WAKELAM V., DI FOLCO E., DUTREY A. and PIETU V.

Abstract (from CDS):

We attempt to determine the molecular composition of disks around young low-mass stars in the ρ Oph region and to compare our results with a similar study performed in the Taurus-Auriga region. We used the IRAM 30m telescope to perform a sensitive search for CN N=2-1 in 29 T Tauri stars located in the ρ Oph and upper Scorpius regions. 13CO J=2-1 is observed simultaneously to provide an indication of the level of confusion with the surrounding molecular cloud. The bandpass also contains two transitions of ortho-H2CO, one of SO, and the C17O J=2-1 line, which provides complementary information on the nature of the emission. Contamination by molecular cloud in 13CO and even C17O is ubiquitous. The CN detection rate appears to be lower than for the Taurus region, with only four sources being detected (three are attributable to disks). H2CO emission is found more frequently, but appears in general to be due to the surrounding cloud. The weaker emission than in Taurus may suggest that the average disk size in the ρ Oph region is smaller than in the Taurus cloud. Chemical modeling shows that the somewhat higher expected disk temperatures in ρ Oph play a direct role in decreasing the CN abundance. Warmer dust temperatures contribute to convert CN into less volatile forms. In such a young region, CN is no longer a simple, sensitive tracer of disks, and observations with other tracers and at high enough resolution with ALMA are required to probe the gas disk population.

Abstract Copyright:

Journal keyword(s): circumstellar matter - protoplanetary disks - radio lines: stars

Simbad objects: 40

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Number of rows : 40

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* CW Tau TT* 04 14 17.0041128798 +28 10 57.765657757 13.92 13.64 12.36 12.86   K0Ve 312 0
2 NAME Tau-Aur Region SFR 04 30 +25.0           ~ 1185 1
3 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3338 0
4 ScoPMS 15 BY* 15 57 19.9931211627 -23 38 49.863842988   13.7       M0V 22 0
5 2MASS J16032367-1751422 pr* 16 03 23.676 -17 51 42.26   14.3       M2 10 0
6 EM* AS 205 TT* 16 11 31.343 -18 38 26.00   13.98 12.63 12.81   K0e+K5e 236 0
7 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 593 2
8 EM* SR 4 TT* 16 25 56.1659484606 -24 20 48.239269835     12.80 11.7 10.7 K0:Ve 144 1
9 GSS 26 Y*O 16 26 10.33152 -24 20 54.8232           M0 71 1
10 Elia 2-20 TT* 16 26 18.8782824640 -24 28 19.698059817           ~ 88 1
11 GSS 30 Y*O 16 26 21.38160 -24 23 04.0524           ~ 194 1
12 [CHG85] GSS 30 IRS 3 Y*O 16 26 21.77376 -24 22 51.3948           ~ 53 0
13 GSS 31 TT* 16 26 23.3694945462 -24 20 59.580653864   15.9 14.70 14.33 11.53 K0e 131 1
14 DoAr 25 TT* 16 26 23.6911216715 -24 43 13.886717283       12.65   K5 119 0
15 Elia 2-24 TT* 16 26 24.0896068058 -24 16 13.456681632   16.3 14.40 15.81 13.97 K6 115 1
16 GSS 39 Y*O 16 26 45.0321556934 -24 23 07.808781522           M0 130 1
17 WL 18 TT* 16 26 48.9801383800 -24 38 25.150629987       19.33 17.38 M3.5 60 0
18 EM* SR 24A TT* 16 26 58.5027167089 -24 45 36.698300286       14.15 12.87 K1 85 0
19 Haro 1-7 ** 16 26 58.53 -24 45 35.3           K2:e+M0.5e 94 0
20 EM* SR 21A TT* 16 27 10.2776332501 -24 19 12.620553212   16.08 14.10     G1 225 1
21 BKLT J162715-245137 TT* 16 27 15.1288179688 -24 51 38.809044111   16.9 15.02 13.86 12.38 M2 55 1
22 WL 5 TT* 16 27 18.17064 -24 28 52.6800           ~ 87 0
23 WL 3 Y*O 16 27 19.21584 -24 28 43.8528           K7 60 0
24 CRBR 2422.8-3423 Y*O 16 27 24.61320 -24 41 03.4080           ~ 78 1
25 YLW 16C Y*O 16 27 26.48952 -24 39 23.0760           M1 53 0
26 YLW 47 TT* 16 27 38.3220493264 -24 36 58.601739078       17.69 15.52 M0 83 0
27 DoAr 33 TT* 16 27 39.0127002068 -23 58 18.708241197   15.7   13.24 12.02 K4 44 0
28 ROX 27 TT* 16 27 39.4297106587 -24 39 15.527875310       15.76 14.03 M0+M4 87 0
29 YLW 45 Y*O 16 27 39.82824 -24 43 15.0672           ~ 103 0
30 Elia 2-36 TT* 16 27 49.8769818907 -24 25 40.237798866       13.69 12.19 A7 63 0
31 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2945 0
32 BKLT J162813-243139 Y*O 16 28 13.74000 -24 31 39.4608           ~ 42 0
33 YLW 58 TT* 16 28 16.5131631203 -24 36 58.057875801   18.5   16.55 14.46 M4 81 0
34 EM* SR 13 TT* 16 28 45.2753496511 -24 28 18.830243306     13.60 12.40 10.9 M2e 118 0
35 Haro 1-16 TT* 16 31 33.4638378966 -24 27 37.158295501   14.02 12.80     K3e 166 0
36 V* V1003 Oph TT* 16 34 09.1694383329 -15 48 16.776308800           G5 86 0
37 Hen 3-1258 TT* 16 48 45.6323559591 -14 16 35.849943900   14.94 13.34 12.84   K6 76 0
38 EM* AS 209 TT* 16 49 15.3035547820 -14 22 08.642015783   12.62 11.28     K4Ve 210 0
39 HD 163296 Ae* 17 56 21.2882188601 -21 57 21.872343282 7.00 6.93 6.85 6.86 6.67 A1Vep 739 0
40 LDN 1157 DNe 20 39 06.4 +68 02 13           ~ 464 0

    Equat.    Gal    SGal    Ecl

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2019.12.14-14:58:49

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