2019A&A...626A..11C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST02:22:27

2019A&A...626A..11C - Astronomy and Astrophysics, volume 626A, 11-11 (2019/6-1)

ALMA survey of Class II protoplanetary disks in Corona Australis: a young region with low disk masses.

CAZZOLETTI P., MANARA C.F., BAOBAB LIU H., VAN DISHOECK E.F., FACCHINI S., ALCALA J.M., ANSDELL M., TESTI L., WILLIAMS J.P., CARRASCO-GONZALEZ C., DONG R., FORBRICH J., FUKAGAWA M., GALVAN-MADRID R., HIRANO N., HOGERHEIJDE M., HASEGAWA Y., MUTO T., PINILLA P., TAKAMI M., TAMURA M., TAZZARI M. and WISNIEWSKI J.P.

Abstract (from CDS):


Context. In recent years, the disk populations in a number of young star-forming regions have been surveyed with the Atacama Large Millimeter/submillimeter Array (ALMA). Understanding the disk properties and their correlation with the properties of the central star is critical to understanding planet formation. In particular, a decrease of the average measured disk dust mass with the age of the region has been observed, consistent with grain growth and disk dissipation.
Aims. We aim to compare the general properties of disks and their host stars in the nearby (d = 160 pc) Corona Australis (CrA) star forming region to those of the disks and stars in other regions.
Methods. We conducted high-sensitivity continuum ALMA observations of 43 Class II young stellar objects in CrA at 1.3mm (230 GHz). The typical spatial resolution is ∼0.3''. The continuum fluxes are used to estimate the dust masses of the disks, and a survival analysis is performed to estimate the average dust mass. We also obtained new VLT/X-shooter spectra for 12 of the objects in our sample for which spectral type (SpT) information was missing.
Results. Twenty-four disks were detected, and stringent limits have been put on the average dust mass of the nondetections. Taking into account the upper limits, the average disk mass in CrA is 6±3M. This value is significantly lower than that of disks in other young (1-3Myr) star forming regions (Lupus, Taurus, Chamaeleon I, and Ophiuchus) and appears to be consistent with the average disk mass of the 5-10 Myr-old Upper Sco. The position of the stars in our sample on the Herzsprung-Russel diagram however seems to confirm that CrA has an age similar to Lupus. Neither external photoevaporation nor a lower-than-usual stellar mass distribution can explain the low disk masses. On the other hand, a low-mass disk population could be explained if the disks were small, which could happen if the parent cloud had a low temperature or intrinsic angular momentum, or if the angular momentum of the cloud were removed by some physical mechanism such as magnetic braking. Even in detected disks, none show clear substructures or cavities.
Conclusions. Our results suggest that in order to fully explain and understand the dust mass distribution of protoplanetary disks and their evolution, it may also be necessary to take into consideration the initial conditions of star- and disk-formation process. These conditions at the very beginning may potentially vary from region to region, and could play a crucial role in planet formation and evolution.

Abstract Copyright: © P. Cazzoletti et al. 2019

Journal keyword(s): protoplanetary disks - submillimeter: ISM - planets and satellites: formation - stars: pre-main sequence - stars: variables: T Tauri, Herbig Ae/Be - stars: formation

VizieR on-line data: <Available at CDS (J/A+A/626/A11): table1.dat table3.dat tablea1.dat>

Simbad objects: 58

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Number of rows : 58

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 IC 348 OpC 03 44 34 +32 09.8           ~ 1227 1
2 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3479 0
3 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1977 1
4 NAME sigma Orionis Open Cluster OpC 05 38 42.00 -02 36 00.0           ~ 3 0
5 NAME Cha I MoC 11 06 48 -77 18.0           ~ 968 1
6 NAME Lup Cloud SFR 16 03 -38.1           ~ 517 0
7 NAME Upper Sco Association As* 16 12 -23.4           ~ 1021 1
8 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3027 0
9 2MASS J18563974-3707205 Y*O 18 56 39.7485538039 -37 07 20.577334452           ~ 3 0
10 2MASS J18564024-3655203 Y*O 18 56 40.2419284648 -36 55 20.447779742           ~ 2 0
11 2MASS J18570785-3654041 Y*O 18 57 07.854 -36 54 04.11           ~ 2 0
12 2MASS J18572247-3734427 Y*O 18 57 22.4777777154 -37 34 42.742674375           ~ 2 0
13 2MASS J18593428-3721410 Y*O 18 59 34.3236570605 -37 21 40.856874687           ~ 2 0
14 2MASSW J1858509-370631 Y*O 18 59 50.9453778704 -37 06 31.509041358           ~ 11 1
15 2MASS J19000157-3637054 TT* 19 00 01.5742226728 -36 37 05.511310245   15.19 13.93     M1V 17 0
16 2MASS J19002906-3656036 Y*O 19 00 29.0664450984 -36 56 03.614124177   17.15 15.68 13.78   M4 15 0
17 2MASS J19004530-3711480 Y*O 19 00 45.3132824694 -37 11 48.082099984           M8.5 6 1
18 2MASS J19005804-3645048 Y*O 19 00 58.0438429997 -36 45 04.883522137       13.57   M0.75 7 0
19 2MASS J19005974-3647109 BD* 19 00 59.7450493930 -36 47 11.071649140           M7 9 0
20 V* S CrA Or* 19 01 08.597088 -36 57 19.89504   11.76 10.91 11.41   G0Ve+K0Ve 258 0
21 2MASS J19011149-3645337 Y*O 19 01 11.4983701125 -36 45 33.839552785   20.1   18.067 15.779 ~ 3 0
22 V* V667 CrA Or* 19 01 16.2873999583 -36 56 28.277527311           M5 14 0
23 2MASS J19011893-3658282 Y*O 19 01 18.9406990215 -36 58 28.248056203       18.4   M4.5 17 0
24 2MASS J19012576-3659191 Y*O 19 01 25.7757536968 -36 59 19.572320991   21.2 19.2     ~ 12 0
25 2MASS J19013232-3658030 Y*O 19 01 32.3352542943 -36 58 03.475576828           M3-M4 22 0
26 2MASS J19013385-3657448 Y*O 19 01 33.859 -36 57 44.83           M2-M3 22 0
27 HD 176386B Y*O 19 01 39.1676654527 -36 53 29.460027237           K7: 14 0
28 2MASS J19014041-3651422 Y*O 19 01 40.4269832409 -36 51 42.789550309           M1-M2 15 0
29 V* TY CrA Ae* 19 01 40.8312189956 -36 52 33.801844387 10.03 9.92 9.39     B9e 268 0
30 HBC 677 Em* 19 01 41.6429644100 -36 59 52.869788444   17.7 16.7     M2 25 0
31 [TS84] IRS 6 Y*O 19 01 50.373 -36 56 39.05           M2 31 0
32 NAME CrA Dark Cloud MoC 19 01 51 -36 58.9           ~ 394 0
33 2MASS J19015112-3654122 Y*O 19 01 51.129 -36 54 12.28           M2 13 0
34 2MASS J19015173-3655143 Y*O 19 01 51.74 -36 55 14.3           ~ 3 0
35 2MASS J19015180-3710478 Y*O 19 01 51.840 -37 10 47.40   18.5   16.451 14.500 ~ 3 0
36 [PCB2011] CrA-22 Y*O 19 01 51.86 -37 10 44.7           ~ 3 0
37 V* R CrA Ae* 19 01 53.6850227874 -36 57 08.145519972 12.781 12.651 11.917 11.242 10.412 B5IIIpe 449 1
38 2MASS J19015374-3700339 Y*O 19 01 53.7542745280 -37 00 34.072497389           M8.5 16 2
39 NAME Coronet Cluster Cl* 19 01 54 -36 57.2           ~ 81 1
40 V* DG CrA Or* 19 01 55.2448632357 -37 23 40.846694643     13.40     K5.0 32 0
41 V* T CrA Ae* 19 01 58.7901571143 -36 57 50.329832417     11.67     F0 155 0
42 2MASS J19020410-3657013 Y*O 19 02 04.11 -36 57 01.3           ~ 10 0
43 2MASS J19020682-3658411 Y*O 19 02 06.8272582269 -36 58 41.608050608           ~ 5 0
44 2MASS J19021201-3703093 Y*O 19 02 12.0192457719 -37 03 09.425944838           M4.5 17 0
45 2MASS J19021464-3700328 Y*O 19 02 14.648 -37 00 32.86           ~ 7 0
46 2MASS J19021667-3645493 Y*O 19 02 16.6802165252 -36 45 49.376661446           M4 11 0
47 2MASS J19022708-3658132 TT* 19 02 27.0964394770 -36 58 13.626018182   15.60 13.59 12.5   M1.9 32 0
48 SSTgbs J1902330-365821 Em* 19 02 33.0821912811 -36 58 21.261487050           M 13 0
49 ISO-CrA 177 Y*O 19 02 54.6470776119 -36 46 19.143019482           M4.5 10 0
50 2MASS J19031185-3709020 Y*O 19 03 11.851 -37 09 02.02       16.82   M5.0 7 0
51 VSST 10 Y*O 19 03 16.0915999676 -37 14 07.944129741           ~ 11 0
52 2MASS J19032429-3715076 Y*O 19 03 24.2876933365 -37 15 07.594367685           ~ 3 0
53 2MASS J19032547-3655051 Y*O 19 03 25.4796583103 -36 55 05.205765630           ~ 3 0
54 2MASS J19041725-3659030 TT* 19 04 17.2621975980 -36 59 03.483001728   17.8 16.8     ~ 6 0
55 NAME CrA Complex reg 19 15 00.0 -37 30 00           ~ 101 1
56 QSO B1921-293 BLL 19 24 51.05595514 -29 14 30.1210524   18.71 18.21 15.07   ~ 689 0
57 QSO B1933-400 QSO 19 37 16.21735166 -39 58 01.5529907   18.15 19 17.43   ~ 169 2
58 NAME Gould Belt PoG ~ ~           ~ 711 1

    Equat.    Gal    SGal    Ecl

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2020.07.10-02:22:27

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