2006A&A...446..211R

Query : 2006A&A...446..211R

2006A&A...446..211R - Astronomy and Astrophysics, volume 446, 211-221 (2006/1-4)

Large dust particles in disks around T Tauri stars.

RODMANN J., HENNING T., CHANDLER C.J., MUNDY L.G. and WILNER D.J.

Abstract (from CDS):

We present 7-mm continuum observations of 14 low-mass pre-main-sequence stars in the Taurus-Auriga star-forming region obtained with the Very Large Array with ∼1.5" resolution and ∼0.3mJy rms sensitivity. For 10 objects, the circumstellar emission has been spatially resolved. The large outer disk radii derived suggest that the emission at this wavelength is mostly optically thin. The millimetre spectral energy distributions are characterised by spectral indices αmm=2.3 to 3.2. After accounting for contributions from free-free emission and corrections for optical depth, we determine dust opacity indices β in the range 0.5 to 1.6, which suggest that millimetre-sized dust aggregates are present in the circumstellar disks. Four of the sources with β>1 may be consistent with submicron-sized dust as found in the interstellar medium. Our findings indicate that dust grain growth to millimetre-sized particles is completed within less than 1Myr for the majority of circumstellar disks.

Abstract Copyright: ∼

Journal keyword(s): stars: pre-main sequence - stars: planetary systems: protoplanetary disks - planetary systems: formation

Simbad objects: 38

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Number of rows : 38
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 QSO B0400+258 QSO 04 03 05.58608082 +26 00 01.5027775     18 19.00   ~ 206 1
2 3C 108 QSO 04 12 43.66686922 +23 05 05.4525810   19.60 18.70     ~ 95 1
3 NAME [BM89] L1495 PoC 04 14 08.2 +28 09 31           ~ 170 0
4 V* CY Tau Or* 04 17 33.7284990744 +28 20 46.812121656 14.52 14.68 13.40 12.59   M1.5 270 0
5 LDN 1495 DNe 04 18.1 +27 37           ~ 366 1
6 V* RY Tau Or* 04 21 57.4092550080 +28 26 35.555316612 10.82 10.34 9.30 9.67 8.87 K1IV/Ve 704 1
7 V* FT Tau Or* 04 23 39.1888788312 +24 56 14.250818940   16.15 14.93 14.70   M2.8 143 0
8 ICRF J042655.7+232739 AGN 04 26 55.7348120 +23 27 39.633401       20.10   ~ 51 1
9 [EM98] DG Tau B cRN Y*O 04 27 02.66088 +26 05 30.4548           ~ 178 0
10 V* DG Tau Or* 04 27 04.6921275888 +26 06 16.060169268 13.57 13.97 10.50 12.28   K6Ve 1024 1
11 Barnard 217 DNe 04 27 46.5 +26 17 52           ~ 89 0
12 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1357 0
13 PKS 0428+205 rG 04 31 03.76141386 +20 37 34.2648470   22.174   19.085   ~ 189 1
14 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 805 1
15 V* HL Tau Or* 04 31 38.5107609312 +18 13 57.859747968   15.89 14.49 14.39   K5 1424 0
16 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 796 0
17 V* XZ Tau Or* 04 31 40.0868968022 +18 13 56.642439056     10.40 13.12   M2e+M2e 444 1
18 V* GG Tau Or* 04 32 30.3506925552 +17 31 40.494063144 14.84 14.78 13.40 11.54   M0e+M2.0e 736 1
19 V* UZ Tau Y*O 04 32 42.81 +25 52 31.3           M4Ve+M1/3Ve 310 0
20 V* UZ Tau B TT* 04 32 42.8118779016 +25 52 31.198173600   14.07 12.72 13.35   M1/3Ve 150 0
21 V* UZ Tau A TT* 04 32 43.0720716552 +25 52 31.013712120       13.15   M2.0e+M3.0e 130 0
22 NAME Kutner's Cloud MoC 04 32 44.6 +24 23 13           ~ 273 0
23 NAME [BM89] TMC-2 PoC 04 32 44.7 +24 25 13           ~ 186 0
24 LDN 1536 DNe 04 33 24.6 +22 43 29           ~ 111 0
25 V* DL Tau Or* 04 33 39.0767679288 +25 20 38.101382952 14.04 14.59 13.40 11.85 10.89 K7Ve 335 0
26 V* DM Tau Or* 04 33 48.7336763736 +18 10 09.973460280 14.30 14.82 14.00     M2Ve 633 0
27 V* CI Tau Or* 04 33 52.0143963264 +22 50 30.094090908 14.97 15.09 13.80     K4IVe 349 1
28 V* DO Tau Or* 04 38 28.5880527336 +26 10 49.467596196 12.78 13.44 12.30 13.01   M1Ve 376 1
29 EM* LkCa 15 Or* 04 39 17.7911622816 +22 21 03.390090984   13.01 12.03 11.61   K5:Ve 690 1
30 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1676 0
31 ICRF J044331.6+344106 Bz? 04 43 31.63519983 +34 41 06.6640402           ~ 36 1
32 V* GM Aur Or* 04 55 10.9815576936 +30 21 59.373771876 14.59 13.351 12.242 11.798   K3Ve 689 0
33 LDN 1517 DNe 04 55 45 +30 33.0           ~ 122 0
34 V* V1366 Ori Ae* 05 16 00.4765181328 -09 48 35.393784012 10.19 10.16 9.84 9.77 9.63 B9.5V 209 0
35 V* CQ Tau Ae* 05 35 58.4666264136 +24 44 54.091450572 11.290 10.780 10.000   8.33 F5IVe 310 0
36 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1493 1
37 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 1892 1
38 HD 163296 Ae* 17 56 21.2881851168 -21 57 21.871819008 7.00 6.93 6.85 6.86 6.67 A3VaekA1mA1 1111 0

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