2018A&A...616L...5P


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.20CET11:21:43

2018A&A...616L...5P - Astronomy and Astrophysics, volume 616, L5-5 (2018/8-1)

First detection of H2S in a protoplanetary disk. The dense GG Tauri A ring.

PHUONG N.T., CHAPILLON E., MAJUMDAR L., DUTREY A., GUILLOTEAU S., PIETU V., WAKELAM V., DIEP P.N., TANG Y.-W., BECK T. and BARY J.

Abstract (from CDS):


Context. Studying molecular species in protoplanetary disks is very useful to characterize the properties of these objects, which are the site of planet formation.
Aims. We attempt to constrain the chemistry of S-bearing molecules in the cold parts of circumstellar disk of GG Tau A.
Methods. We searched for H2S, CS, SO, and SO2 in the dense disk around GG Tau A with the NOrthem Extended Millimeter Array (NOEMA) interferometer. We analyzed our data using the radiative transfer code DiskFit and the three-phase chemical model Nautilus.
Results. We detected H2S emission from the dense and cold ring orbiting around GG Tau A. This is the first detection of H2S in a protoplanetary disk. We also detected HCO+, H13CO+, and DCO+ in the disk. Upper limits for other molecules, CCS, SO2, SO, HC3N, and c-C3H2 are also obtained. The observed DCO+/HCO+ ratio is similar to those in other disks. The observed column densities, derived using our radiative transfer code DiskFit, are then compared with those from our chemical code Nautilus. The column densities are in reasonable agreement for DCO+, CS, CCS, and SO2. For H2S and SO, our predicted vertical integrated column densities are more than a factor of 10 higher than the measured values.
Conclusions. Our results reinforce the hypothesis that only a strong sulfur depletion may explain the low observed H2S column density in the disk. The H2S detection in GG Tau A is most likely linked to the much larger mass of this disk compared to that in other T Tauri systems.

Abstract Copyright: © ESO 2018

Journal keyword(s): protoplanetary disks - molecular data - astrochemistry - stars: individual: GG Tau

Simbad objects: 14

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Number of rows : 14

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 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3487 3
2 V* GG Tau TT* 04 32 30.3318954228 +17 31 40.834888327 14.84 14.78 13.40 11.54   M0e+M2.0e 633 1
3 V* DM Tau TT* 04 33 48.7335659850 +18 10 09.974471722 14.30 14.82 14.00     M2Ve 493 0
4 EM* LkCa 15 TT* 04 39 17.7912813350 +22 21 03.387667491   13.01 12.03 11.61   K5:Ve 533 1
5 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1332 0
6 V* GO Tau TT* 04 43 03.0761884276 +25 20 18.708294279   16.2 14.40     M2.3 146 0
7 QSO B0446+113 BLL 04 49 07.67110088 +11 21 28.5964577     20 18.58   ~ 221 1
8 HD 31648 Ae* 04 58 46.2654165113 +29 50 36.990341242 7.84 7.78 7.62 7.76 7.43 A5Vep 381 0
9 QSO B0507+179 QSO 05 10 02.36912982 +18 00 41.5816534   20.0 19.0 19.09   ~ 287 1
10 V* TW Hya TT* 11 01 51.9054298616 -34 42 17.031550898   11.94 10.50 10.626 9.18 K6Ve 1466 1
11 LDN 183 MoC 15 54 12.2 -02 49 42           ~ 675 1
12 BKLT J162813-243139 Y*O 16 28 13.74000 -24 31 39.4608           ~ 42 0
13 HD 163296 Ae* 17 56 21.2882188601 -21 57 21.872343282 7.00 6.93 6.85 6.86 6.67 A1Vep 747 0
14 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 695 0

    Equat.    Gal    SGal    Ecl

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2020.01.20-11:21:43

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