2013A&A...551A..34S


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.17CET13:49:59

2013A&A...551A..34S - Astronomy and Astrophysics, volume 551A, 34-34 (2013/3-1)

Protostars, multiplicity, and disk evolution in the Corona Australis region: a Herschel Gould Belt Study.

SICILIA-AGUILAR A., HENNING T., LINZ H., ANDRE P., STUTZ A., EIROA C. and WHITE G.J.

Abstract (from CDS):

The CrA region and the Coronet cluster form a nearby (138 pc), young (1-2 Myr) star-forming region that hosts a moderate population of Class I, II, and III objects. We study the structure of the cluster and the properties of the protostars and protoplanetary disks in the region. We present Herschel PACS photometry at 100 and 160 µm, obtained as part of the Herschel Gould Belt Survey. The Herschel maps reveal the cluster members within the cloud with high sensitivity and high dynamic range. Many of the cluster members are detected, including some embedded, very low-mass objects, several protostars (some of them extended), and substantial emission from the surrounding molecular cloud. Herschel also reveals some striking structures, such as bright filaments around the IRS 5 protostar complex and a bubble-shaped rim associated with the Class I object IRS 2. The disks around the Class II objects display a wide range of mid- and far-IR excesses consistent with different disk structures. We have modeled the disks with the RADMC radiative transfer code to quantify their properties. Some of them are consistent with flared, massive, relatively primordial disks (S CrA, T CrA). Others display significant evidence for inside-out evolution, consistent with the presence of inner holes/gaps (G-85, G-87). Finally, we found disks with a dramatic small dust depletion (G-1, HBC 677) that, in some cases, could be related to truncation or to the presence of large gaps in a flared disk (CrA-159). The derived masses for the disks around the low-mass stars are found to be below the typical values in Taurus, in agreement with previous Spitzer observations. The Coronet cluster presents itself as an interesting compact region that contains both young protostars and very evolved disks. The Herschel data provide sufficient spatial resolution to detect small-scale details, such as filamentary structures or spiral arms associated with multiple star formation. The disks around the cluster members range from massive, flared primordial disks to disks with substantial small dust grain depletion or with evidence of inside-out evolution. This results in an interesting mixture of objects for a young and presumably coevally formed cluster. Given the high degree of multiplicity and interactions observed among the protostars in the region, the diversity of disks may be a consequence of the early star formation history, which should also be taken into account when studying the disk properties in similar sparsely populated clusters.

Abstract Copyright:

Journal keyword(s): stars: formation - stars: pre-main sequence - protoplanetary disks - stars: late-type

VizieR on-line data: <Available at CDS (J/A+A/551/A34): stars.dat table3.dat refs.dat>

Nomenclature: Table 2: [SHL2013] 19 North N=1, [SHL2013] 19 South N=1.

CDS comments: B18598.6-3658 is a misprint for B185839.6-3658. B185839.6-3658 = [WMB97] 185839.6-365823. IRAS 18598 = IRAS 18595-3712. IRS N = [TS84] IRS N. SMM N = [NWA2005] SMM N. APEX NN = [SHK2011b] NN. G-NNN = [SHJ2008] G-NNN. #NN = [CKR2003] MMS NN. CrA-NNN = [LEM2005b] CrA NNN, or ISO-CrA NNN, or [PCB2011] CrA-NN in Simbad. G-128 and G-74 are not in Simbad (no coordinates).

Simbad objects: 67

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Number of rows : 67

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* AA Per Mi* 03 15 14.4493699914 +46 34 51.674234058   11.04 9.42     M6 24 0
2 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3372 0
3 2MASS J19005974-3647109 BD* 19 00 59.7450493930 -36 47 11.071649140           M7 9 0
4 V* S CrA TT* 19 01 08.597088 -36 57 19.89504   11.76 10.91 11.41   G0Ve+K0Ve 258 0
5 2MASS J19011169-3722213 Y*O 19 01 11.6197843567 -37 22 21.197601775           M4 10 0
6 V* V667 CrA Or* 19 01 16.2873999583 -36 56 28.277527311           M5 14 0
7 2MASS J19011893-3658282 Y*O 19 01 18.9406990215 -36 58 28.248056203       18.4   M4.5 17 0
8 [SHJ2008] G-112 * 19 01 19.4 -37 01 42           ~ 2 0
9 2MASS J19012083-3703027 Y*O 19 01 20.8421379417 -37 03 02.768127115           M5 12 0
10 2MASS J19012872-3659317 Y*? 19 01 28.7319364964 -36 59 31.780844396         13.15 M1.0 14 0
11 2MASS J19012901-3701484 Y*O 19 01 29.0324931845 -37 01 48.520870032           M3.75 15 0
12 2MASS J19013232-3658030 Y*O 19 01 32.3352542943 -36 58 03.475576828           M3-M4 22 0
13 JCMTSF J190133.9-365334 mm 19 01 33.2 -36 53 35           ~ 6 0
14 2MASS J19013385-3657448 Y*O 19 01 33.859 -36 57 44.83           M2-M3 22 0
15 [SHJ2008] G-80 * 19 01 35.7 -37 02 32           ~ 3 0
16 HD 176386 Y*O 19 01 38.9314887024 -36 53 26.560961605 7.28 7.44 7.32 8.11   B9V 114 0
17 2MASS J19014041-3651422 Y*O 19 01 40.4269832409 -36 51 42.789550309           M1-M2 15 0
18 V* TY CrA Ae* 19 01 40.8312189956 -36 52 33.801844387 10.03 9.92 9.39     B9e 267 0
19 [SHJ2008] G-122 * 19 01 40.9 -36 57 15           ~ 2 0
20 [TS84] IRS 2 Y*O 19 01 41.569 -36 58 31.23           K2 78 0
21 HBC 677 Em* 19 01 41.6429644100 -36 59 52.869788444   17.7 16.7     M2 25 0
22 JCMTSF J190145.9-365533 smm 19 01 46.4 -36 55 30           ~ 4 0
23 2MASS J19014805-3657219 Y*O 19 01 48.056 -36 57 21.95           ~ 93 0
24 CHLT 3 * 19 01 48.10 -36 57 22.7           K6V 28 0
25 CHLT 4 * 19 01 48.15 -36 57 22.3           ~ 14 0
26 2MASS J19014846-3657148 Y*O 19 01 48.461 -36 57 14.88           ~ 17 0
27 [TS84] IRS 6 Y*O 19 01 50.373 -36 56 39.05           M2 31 0
28 [TS84] IRS 6B * 19 01 50.63 -36 56 37.1           ~ 3 0
29 V* V710 CrA Or* 19 01 50.67792 -36 58 09.6132           K7: 114 0
30 NAME CrA Dark Cloud MoC 19 01 51 -36 58.9           ~ 388 0
31 [SHJ2008] G-45 * 19 01 52.2 -37 05 42           ~ 2 0
32 [SHJ2008] G-43 * 19 01 52.6 -37 02 44           ~ 2 0
33 [WMB97] 185830.2-370122 Y*O 19 01 52.63 -36 57 00.2           ~ 29 0
34 V* R CrA Ae* 19 01 53.6850227874 -36 57 08.145519972 12.781 12.651 11.917 11.242 10.412 B5IIIpe 444 1
35 2MASS J19015374-3700339 Y*O 19 01 53.7542745280 -37 00 34.072497389           M8.5 16 2
36 NAME Coronet Cluster Cl* 19 01 54 -36 57.2           ~ 80 1
37 2MASS J19015545-3657231 Y*O 19 01 55.460 -36 57 23.13           ~ 90 2
38 [CKR2003] MMS 13 smm 19 01 55.5 -36 57 38           ~ 21 0
39 [FP2007] J190155.76-365727.7 Y*O 19 01 55.77 -36 57 27.5           ~ 5 0
40 [SHJ2008] G-36 * 19 01 55.9 -36 52 05           ~ 2 0
41 [NWA2005] SMM 1B Y*O 19 01 56.41 -36 57 28.0           ~ 77 1
42 2MASS J19015833-3700267 Y*O 19 01 58.34 -37 00 26.8           ~ 8 0
43 [NWA2005] SMM 2 Y*O 19 01 58.55 -36 57 08.7           ~ 17 0
44 V* T CrA Ae* 19 01 58.7901571143 -36 57 50.329832417     11.67     F0 153 0
45 [FP2007] J190201.94-365400.1 Y*O 19 02 01.96 -36 54 00.0           ~ 8 0
46 [SHK2011b] 13 smm 19 02 11.4 -37 00 47           ~ 2 0
47 2MASS J19021201-3703093 Y*O 19 02 12.0192457719 -37 03 09.425944838           M4.5 17 0
48 [CKR2003] MMS 19 mm 19 02 12.4 -36 57 17           ~ 5 0
49 [SHL2013] 19 North FIR 19 02 12.5 -36 57 18           ~ 1 0
50 [SHL2013] 19 South FIR 19 02 15.5 -36 57 47           ~ 1 0
51 2MASS J19021667-3645493 Y*O 19 02 16.6802165252 -36 45 49.376661446           M4 11 0
52 [SHK2011b] 6 smm 19 02 18.3 -37 01 41           ~ 2 0
53 2MASS J19022213-3655409 TT* 19 02 22.1302451077 -36 55 40.960838092   15.17 13.72 12.5   K2IV 35 0
54 [SHK2011b] 16 smm 19 02 24.3 -36 56 50           ~ 2 0
55 2MASS J19022708-3658132 TT* 19 02 27.0964394770 -36 58 13.626018182   15.60 13.59 12.5   M1.9 32 0
56 SSTgbs J1902330-365821 Em* 19 02 33.0821912811 -36 58 21.261487050           M 13 0
57 [SHK2011b] 19 smm 19 02 33.5 -37 02 08           ~ 2 0
58 ISO-CrA 177 Y*O 19 02 54.6470776119 -36 46 19.143019482           M4.5 10 0
59 IRAS 18595-3712 Y*O 19 02 58.706 -37 07 34.67           ~ 42 0
60 [SHK2011b] 7 smm 19 03 06.4 -37 14 53           ~ 2 0
61 V* VV CrA TT* 19 03 06.7419790029 -37 12 49.683383133   16.45 14.67 14.12 11.62 K7 107 0
62 VSST 10 Y*O 19 03 16.0915999676 -37 14 07.944129741           ~ 11 0
63 [NWA2005] SMM 1A S smm 19 05 54.97 -36 58 29.0           ~ 2 0
64 NAME CrA Complex reg 19 15 00.0 -37 30 00           ~ 101 1
65 GRS G081.70 +00.50 SFR 20 39 01.6 +42 19 38           O4.5 936 0
66 Ass Cep OB 2 As* 21 51 +60.0           ~ 277 0
67 NAME Gould Belt PoG ~ ~           ~ 700 1

    Equat.    Gal    SGal    Ecl

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2020.02.17-13:49:59

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