2007A&A...476..279G


Query : 2007A&A...476..279G

2007A&A...476..279G - Astronomy and Astrophysics, volume 476, 279-289 (2007/12-2)

Spatially extended polycyclic aromatic hydrocarbons in circumstellar disks around T Tauri and Herbig Ae stars.

GEERS V.C., VAN DISHOECK E.F., VISSER R., PONTOPPIDAN K.M., AUGEREAU J.-C., HABART E. and LAGRANGE A.M.

Abstract (from CDS):

Our aim is to determine the presence and location of the emission from polycyclic aromatic hydrocarbons (PAHs) towards low and intermediate mass young stars with disks using large aperture telescopes. VLT-VISIR N-band spectra and VLT-ISAAC and VLT-NACO L-band spectra of 29 sources are presented, spectrally resolving the 3.3, 8.6, 11.2, and 12.6µm PAH features. Spatial-extent profiles of the features and the continuum emission have been derived and used to associate the PAH emission with the disks. The results are discussed in the context of recent PAH-emission disk models. The 3.3, 8.6, and 11.2µm PAH features are detected toward a small fraction of the T Tauri stars, with typical upper limits between 1x10–15 and 5x10–17W/m2. All 11.2µm detections from a previous Spitzer survey are confirmed with (tentative) 3.3µm detections, and both the 8.6 and the 11.2µm features are detected in all PAH sources. For 6 detections, the spatial extent of the PAH features is confined to scales typically smaller than 0.12-0.34'', consistent with the radii of 12-60AU disks at their distances (typically 150pc). For 3 additional sources, WL 16, HD 100546, and TY CrA, one or more of the PAH features are more extended than the hot dust continuum of the disk, whereas for Oph IRS 48, the size of the resolved PAH emission is confirmed as smaller than for the large grains. For HD 100546, the 3.3µm emission is confined to a small radial extent of 12±3AU, most likely associated with the outer rim of the gap in this disk. Gaps with radii out to 10-30AU may also affect the observed PAH extent for other sources. For both Herbig Ae and T Tauri stars, the small measured extents of the 8.6 and 11.2µm features are consistent with larger (≥100 carbon atoms) PAHs.

Abstract Copyright:

Journal keyword(s): stars: pre-main sequence - planetary systems: protoplanetary disks - circumstellar matter - astrochemistry

Simbad objects: 39

goto Full paper

goto View the references in ADS

Number of rows : 39
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 V* SX Cha Or* 10 55 59.802000 -77 24 40.12524   16.01 14.57 14.23 12.35 M1.5+M3 90 0
2 V* SY Cha Or* 10 56 30.3883129248 -77 11 39.401977596         11.29 K5Ve 131 0
3 V* WX Cha Or* 11 09 58.666944 -77 37 09.03432   14.93 13.85 14.23 12.20 M1+M5 103 0
4 HD 98922 Be* 11 22 31.6743077592 -53 22 11.457008148   6.80 6.76     B9Ve 132 0
5 HD 100546 Be* 11 33 25.4408872296 -70 11 41.241297948   6.71 6.30   6.64 A0VaekB8_lB 806 1
6 HD 101412 Be* 11 39 44.4564911064 -60 10 27.719780304   9.465 9.288     A3VaekA0mA0_lB 139 0
7 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 806 0
8 V* T Cha Or* 11 57 13.5245085552 -79 21 31.530508884   10.00 11.86     K0e 272 1
9 * del Crv PM* 12 29 51.8551642 -16 30 55.552542 2.80 2.89 2.94 2.99 3.03 A0IV(n)kB9 205 0
10 IRAS 12535-7623 Y*O 12 57 11.6949853032 -76 40 11.291754000   17.20 15.00     M0e 42 0
11 * tau Lib SB* 15 38 39.3694957 -29 46 39.895604   3.481 3.642     B2.5V 158 0
12 CD-33 10685 Or* 15 45 12.8678037432 -34 17 30.644403036 12.47 11.56 10.224 9.60 8.685 K3Ve 272 1
13 V* GW Lup Or* 15 46 44.7290527536 -34 30 35.677420056   13.8       M1.5e 143 0
14 THA 15-5 TT* 15 47 56.9427182064 -35 14 34.796420412   14.5 16.2     K7e 85 0
15 V* GQ Lup Or* 15 49 12.1053805848 -35 39 05.058139788 12.19 12.76 11.66 11.15   K7Ve 290 1
16 HD 141569 Y*O 15 49 57.7482550392 -03 55 16.341617064 7.22 7.20 7.12 7.00 7.04 A2VekB9mB9(_lB) 540 0
17 * 47 Lib Ro* 15 55 00.3615238176 -19 22 58.554643620   5.930 5.957     B2/3V 119 0
18 THA 15-12 Or* 15 56 09.2066646912 -37 56 06.126118692   13.12 11.93 11.45   M0e 420 0
19 V* RU Lup TT* 15 56 42.3108692112 -37 49 15.473946900 9.27 10.07 9.60     K7/M0e 468 0
20 NAME Lupus Complex SFR 16 03 -38.1           ~ 720 0
21 GSS 31 TT* 16 26 23.3684537424 -24 20 59.579380248   15.9 14.70 14.33 11.53 K0e 143 1
22 WL 16 Y*O 16 27 02.33520 -24 37 27.2316           A0-F3 157 0
23 EM* SR 21A TT* 16 27 10.2778380120 -24 19 12.622467720   16.08 14.10     G1 271 1
24 IRAS 16245-2423 TT* 16 27 37.1906433768 -24 30 35.025246828       16.66 14.67 B5-F2 307 0
25 CD-24 12689 Or* 16 27 40.2857881416 -24 22 04.130226300   12.91 11.533 11.11 10.00 K5e 283 0
26 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3625 1
27 Haro 1-17 Y*O 16 32 21.9310906392 -24 42 14.841998352   16.76 15.61     M2.5e 42 0
28 Hen 3-1258 Or* 16 48 45.6326070624 -14 16 35.849828856   14.94 13.34 12.84   K6 120 0
29 EM* AS 209 TT* 16 49 15.3034917000 -14 22 08.643317664   12.62 11.28     K4Ve 389 0
30 * gam Oph PM* 17 47 53.5605898827 +02 42 26.204838837 3.83 3.80 3.75 3.71 3.71 A1VnkA0mA0 391 0
31 * eps Sgr PM* 18 24 10.31840 -34 23 04.6193   1.82 1.81     B9IVp_lB? 211 1
32 V* VV Ser Ae* 18 28 47.8620017808 +00 08 39.923474964 12.99 12.63 11.80 11.01 10.24 A5Ve 249 0
33 HBC 668 Em* 18 29 01.2260660808 +00 29 33.122252544   16.8       M0.5: 25 0
34 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1100 2
35 HBC 672 Em* 18 29 56.8848005064 +01 14 46.304766672   17.6       K8.0 102 0
36 HD 176386 Y*O 19 01 38.9318002416 -36 53 26.561166432 7.28 7.44 7.32 8.11   B9V 136 0
37 V* TY CrA Ae* 19 01 40.8284458320 -36 52 33.816176040 10.03 9.92 9.39     B9e 285 0
38 V* T CrA Ae* 19 01 58.7902764120 -36 57 50.339720880     11.67     F0 167 0
39 * alf Gru PM* 22 08 13.98473 -46 57 39.5078 1.11 1.58 1.71 1.75 1.83 B6V 301 0

To bookmark this query, right click on this link: simbad:objects in 2007A&A...476..279G and select 'bookmark this link' or equivalent in the popup menu