2012ApJ...758...77Z


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.20CET15:13:43

2012ApJ...758...77Z - Astrophys. J., 758, 77 (2012/October-3)

A 40 myr old gaseous circumstellar disk at 49 Ceti: massive CO-rich comet clouds at young a-type stars.

ZUCKERMAN B. and SONG I.

Abstract (from CDS):

The gaseous molecular disk that orbits the main-sequence A-type star 49 Ceti has been known since 1995, but the stellar age and the origin of the observed carbon monoxide molecules have been unknown. We now identify 49 Ceti as a member of the 40 Myr old Argus Association and present a colliding comet model to explain the high CO concentrations seen at 49 Ceti and the 30 Myr old A-type star HD 21997. The model suggests that massive–400 Earth mass–analogs of the Sun's Kuiper Belt are in orbit around some A-type stars, that these large masses are composed primarily of comet-like objects, and that these objects are rich in CO and perhaps also CO2. We identify additional early-type members of the Argus Association and the Tucana/Horologium and Columba Associations; some of these stars display excess mid-infrared emission as measured with the Widefield Infrared Survey Explorer.

Abstract Copyright:

Journal keyword(s): circumstellar matter - comets: general - evolution - protoplanetary disks - stars: individual: 49 Ceti

Simbad objects: 57

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Number of rows : 57

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 NAME THA As* 00 00 -62.0           ~ 323 0
2 * bet03 Tuc ** 00 32 43.9055907013 -63 01 53.397968811 5.15 5.13 5.09     A0V 110 0
3 * 49 Cet PM* 01 34 37.7788265080 -15 40 34.898112472   5.667 5.607   5.54 A1V 235 0
4 HD 10638 PM* 01 44 22.8099858239 +32 30 57.160852756   6.96 6.73   6.45 A3 30 0
5 HD 15745 PM* 02 32 55.8109275442 +37 20 01.039220396   7.84 7.49   7.05 F0 62 0
6 * s Eri SB* 02 39 47.9654399769 -42 53 30.363788605   4.81 4.75     A1Vb 72 1
7 HD 20888 PM* 03 17 59.0758770197 -66 55 36.665180331   6.163 6.022     A3V 57 0
8 HD 21997 PM* 03 31 53.6468412720 -25 36 50.936416301   6.501 6.372   6.25 A3IV/V 119 0
9 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2924 0
10 NAME Tau-Aur Region SFR 04 30 +25.0           ~ 1187 1
11 HD 30447 * 04 46 49.5287921615 -26 18 08.850707067   8.25 7.86   7.39 F3V 56 0
12 * ome Aur ** 04 59 15.40974 +37 53 24.8816   5.008 4.989     A1V 117 1
13 HD 32297 * 05 02 27.4357771761 +07 27 39.682335894   8.32 8.14     A0V 140 0
14 HD 32296 PM* 05 04 16.1895892841 +45 46 45.669582877   6.73 6.51     A2 16 0
15 HD 35505 * 05 24 28.4872783247 -16 58 32.789078380   5.631 5.636     A0V 39 0
16 HD 37286 * 05 36 10.2953673127 -28 42 28.848002162   6.409 6.256   6.10 A2III/IV 50 0
17 HD 37306 * 05 37 08.7722370089 -11 46 31.852773694   6.143 6.089     A1V 40 0
18 HD 38206 * 05 43 21.6709387268 -18 33 26.906533478   5.711 5.727   5.72 A0V 92 0
19 * zet Lep * 05 46 57.3409587 -14 49 19.019943   3.637 3.525     A2IV-V(n) 277 0
20 NAME Columba Association As* 06 14.0 -40 03           ~ 186 0
21 HD 45380 * 06 26 44.8516980664 -07 30 42.980412696   6.29 6.33     B9V 42 0
22 * 26 Gem PM* 06 42 24.3272189 +17 38 43.111835   5.27 5.21     A2V 76 0
23 HD 71043 * 08 22 55.1585014329 -52 07 25.423822563   5.900 5.887     A0V 55 0
24 HD 85672 * 09 53 59.1495660014 +27 41 43.649223378   7.75 7.58   7.41 A0 21 0
25 * q Vel PM* 10 14 44.1557297 -42 07 18.993292 3.98 3.90 3.85 3.83 3.81 A2Va 119 0
26 HD 90874 PM* 10 27 25.2837832220 -65 42 16.778605330   6.084 5.991     A2V 32 0
27 HD 95429 PM* 11 00 08.2775291838 -51 49 04.085880388   6.331 6.143     A3III/IV 24 0
28 V* TW Hya TT* 11 01 51.9054298616 -34 42 17.031550898   11.94 10.50 10.626 9.18 K6Ve 1467 1
29 HD 101615 PM* 11 41 19.7915798610 -43 05 44.392021046   5.57 5.53     A0V 43 0
30 * bet Leo dS* 11 49 03.57834 +14 34 19.4090 2.30 2.22 2.13 2.08 2.06 A3Va 536 0
31 * 3 Crv PM* 12 11 03.8398744643 -23 36 08.722132312   5.52 5.47     A1V 47 0
32 HD 107146 PM* 12 19 06.5022221429 +16 32 53.870713669   7.61   6.7   G2V 214 0
33 HD 109573 PM* 12 36 01.0317721349 -39 52 10.222698506   5.786 5.774 7.25 5.81 A0V 542 1
34 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 991 0
35 CPD-68 1894 TT* 13 22 07.5420267499 -69 38 12.216304202   11.38 10.393   9.117 K1Ve 125 0
36 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 531 0
37 HD 130556 PM* 14 48 20.7372909012 +21 19 06.975702328   8.28 7.89     F0 22 0
38 HD 131835 * 14 56 54.4676957121 -35 41 43.659216390   8.05 7.86     A2IV 73 0
39 HD 138965 PM* 15 40 11.5552330656 -70 13 40.380227655   6.499 6.424     A1V 40 0
40 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11163 0
41 HD 319139 BY* 18 14 10.4818974563 -32 47 34.516106830   11.47 10.68   9.11 K5+K7 277 0
42 * 108 Her SB* 18 20 56.9701845131 +29 51 32.120410658   5.84 5.63   5.37 kA3mA7+A9V 87 0
43 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0Va 2480 0
44 HD 172555 PM* 18 45 26.9004853 -64 52 16.539796   4.967 4.767     A7V 227 0
45 * eta Tel ** 19 22 51.20620 -54 25 26.1473   5.035 5.020   4.99 A0V+M7/8V 182 0
46 * phi Aql SB* 19 56 14.2518307537 +11 25 25.393114620   5.283 5.278     A1IV 124 0
47 * eps Pav PM* 20 00 35.5555788 -72 54 37.819779   3.927 3.940     A0Va 109 0
48 HD 191089 PM* 20 09 05.2158287736 -26 13 26.520539765   7.62 7.18     F5V 111 0
49 * b03 Cyg dS* 20 14 32.0319919055 +36 48 22.684605093 5.10 5.11 4.99 4.79 4.72 A2V 240 0
50 * chi Cap PM* 21 08 33.6245641296 -21 11 37.225376062   5.29 5.28     A0V 59 0
51 * alf PsA ** 22 57 39.04625 -29 37 20.0533 1.31 1.25 1.16 1.11 1.09 A4V 1105 3
52 * kap Psc a2* 23 26 55.9557928466 +01 15 20.174323477 4.94 4.98 4.94 4.87 4.90 A2VpSrCrSi 254 0
53 HD 221853 PM* 23 35 36.1524832442 +08 22 57.424769000   7.75 7.34   6.88 F0 39 0
54 * del Scl ** 23 48 55.54658 -28 07 48.9745 4.55 4.58 4.57 4.53 4.55 A0VankB9((_lB)) 130 0
55 * eta Tuc ** 23 57 35.0785168096 -64 17 53.622899148   5.046 4.989     A1V 78 0
56 NAME AB Dor Moving Group MGr ~ ~           ~ 339 0
57 NAME Argus Association As* ~ ~           ~ 158 0

    Equat.    Gal    SGal    Ecl

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2020.01.20-15:13:43

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