2019MNRAS.489.2189L


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.19CEST18:42:12

2019MNRAS.489.2189L - Mon. Not. R. Astron. Soc., 489, 2189-2194 (2019/October-3)

Evaluation of nearby young moving groups based on unsupervised machine learning.

LEE J. and SONG I.

Abstract (from CDS):

Nearby young stellar moving groups have been identified by many research groups with different methods and criteria, giving rise to caution regarding the reality of some groups. We aim to utilize moving groups in an unbiased way to create a list of unambiguously recognizable moving groups and their members. For the analysis, two unsupervised machine-learning algorithms (K-means and Agglomerative Clustering) are applied to previously known bona fide members of nine moving groups from our previous study. As a result of this study, we recovered six previously known groups (AB Doradus, Argus, β Pic, Carina, TWA and Volans-Carina). Three other known groups are recognized as well; however, they are combined into two new separate groups (ThOr + Columba and TucHor + Columba).

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: data analysis - open clusters and associations: general - solar neighbourhood

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 36

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Number of rows : 36

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 Tuc Moving Group MGr 00 00 -64.0           ~ 67 0
2 NAME THA As* 00 00 -62.0           ~ 350 0
3 V* PW And RS* 00 18 20.8896176716 +30 57 22.127515298   9.78 8.86 8.3 7.78 K2V 108 1
4 2MASSI J0019262+461407 LM* 00 19 26.2673571201 +46 14 07.786957453     20.0     M8 31 0
5 DENIS J004135.3-562112 LM* 00 41 35.3887657818 -56 21 12.785140974       17.97 14.69 M7.5e 32 0
6 LP 193-564 ** 00 48 58.265808 +44 35 08.57904   14.66 13.07 12.60 10.45 M3 30 0
7 SCR J0103-5515 ** 01 03 35.655120 -55 15 56.24316   16.99 15.40 14.96 12.09 M5.0 31 0
8 V* GU Psc RS* 01 12 35.0519481316 +17 03 55.571226067   15.59 14.10 13.78   M3 29 0
9 CD-52 381 PM* 01 52 14.6258722411 -52 19 33.185337378   11.836 10.953 10.42 9.825 K2V(e) 47 0
10 NAME Horologium Association As* 02 10.0 -54 30           ~ 51 0
11 2MASS J02192210-3925225 ** 02 19 22.1105002404 -39 25 22.520274475   18.5   15.5 13.42 M6+L4 13 0
12 * 51 Eri PM* 04 37 36.1323118067 -02 28 24.778826936   5.486 5.209     F0IV 173 0
13 NAME 32 Ori group OpC 05 27 11 +06 16.0           ~ 40 0
14 CD-29 2360 Ro* 05 34 59.2267445129 -29 54 03.979159464   11.66 10.534   9.420 K3Ve 9 0
15 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 1668 1
16 CD-35 2722 ** 06 09 19.2082646634 -35 49 31.062882043   12.61 11.083 10.682 9.337 M1Ve 61 0
17 NAME Columba Association As* 06 14.0 -40 03           ~ 206 0
18 HD 44627 Ro* 06 19 12.9129838711 -58 03 15.524890610   10.01 9.205   8.185 K1V(e) 139 1
19 CD-42 2906 Ro* 07 01 53.4059392780 -42 27 56.157253619   11.48 10.61   9.621 K1V 15 0
20 CD-48 2972 PM* 07 28 22.0257610739 -49 08 37.664065864   10.53 9.855   8.996 G8V 19 0
21 NAME Volans-Carina Association As* 09 37 00.0 -65 18 00           ~ 7 0
22 NAME TW Hya Association As* 11 01.9 -34 42           ~ 825 0
23 2MASS J11101001+0116130 BD* 11 10 10.01064 +01 16 13.0872           T5.5 64 0
24 CD-33 7795 TT* 11 31 55.2603055856 -34 36 27.214242128   12.97 11.524 11.150 9.150 M2Ve 176 0
25 TWA 27 LM* 12 07 33.4676156527 -39 32 54.016042897     19.95 17.99 15.88 M8IVe 311 0
26 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 573 0
27 V* PZ Tel BY* 18 53 05.8733807460 -50 10 49.901380086   9.22 8.342   7.464 G9IV 289 0
28 * eta Tel PM* 19 22 51.2064652963 -54 25 26.152538950   5.035 5.020   4.99 A0V+M7/8V 189 0
29 2MASS J21140802-2251358 BD* 21 14 08.02560 -22 51 35.8380           L7.5 77 0
30 ASAS J212528-8138.5 BY* 21 25 27.4863621030 -81 38 27.692110693   13.31 11.821 11.517 9.64 M1Ve 24 0
31 [SLS2012] PYC J22502+2325 PM* 22 50 15.1392417356 +23 25 34.256486271     14.9     ~ 5 0
32 PM J23515+3127 PM* 23 51 33.6739850452 +31 27 23.020837909     13.602 13.105   M2.0V 33 0
33 NAME Argus Association As* ~ ~           ~ 169 0
34 NAME Carina Association As* ~ ~           ~ 104 1
35 NAME AB Dor Moving Group MGr ~ ~           ~ 364 0
36 NAME Car-Vel Region reg ~ ~           ~ 16 0

    Equat.    Gal    SGal    Ecl

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2020.10.19-18:42:12

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