2019MNRAS.482.5302S

Query : 2019MNRAS.482.5302S

2019MNRAS.482.5302S - Mon. Not. R. Astron. Soc., 482, 5302-5315 (2019/February-1)

The GALAH survey: co-orbiting stars and chemical tagging.

SIMPSON J.D., MARTELL S.L., DA COSTA G., CASEY A.R., FREEMAN K.C., HORNER J., TING Y.-S., NATAF D.M., LEWIS G.F., NESS M.K., ZUCKER D.B., COTTRELL P.L., COTAR K., ASPLUND M., BLAND-HAWTHORN J., BUDER S., D'ORAZI V., DE SILVA G.M., DUONG L., KOS J., LIN J., LIND K., SCHLESINGER K.J., SHARMA S., ZWITTER T., KAFLE P.R. and NORDLANDER T.

Abstract (from CDS):

We present a study using the second data release of the GALAH survey of stellar parameters and elemental abundances of 15 pairs of stars identified by Oh et al. They identified these pairs as potentially co-moving pairs using proper motions and parallaxes from Gaia DR1. We find that 11 very wide (>1 pc) pairs of stars do in fact have similar Galactic orbits, while a further four claimed co-moving pairs are not truly co-orbiting. Eight of the 11 co-orbiting pairs have reliable stellar parameters and abundances, and we find that three of those are quite similar in their abundance patterns, while five have significant [Fe/H] differences. For the latter, this indicates that they could be co-orbiting because of the general dynamical coldness of the thin disc, or perhaps resonances induced by the Galaxy, rather than a shared formation site. Stars such as these, wide binaries, debris of past star formation episodes, and coincidental co-orbiters, are crucial for exploring the limits of chemical tagging in the Milky Way.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: abundances - stars: formation - galaxy: disc

VizieR on-line data: <Available at CDS (J/MNRAS/482/5302): table1.dat>

Simbad objects: 54

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Number of rows : 54
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
2 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
3 TYC 8575-2294-1 PM* 08 23 10.7729706816 -56 48 39.807020808   11.12 10.60     ~ 7 0
4 [OPH2017] 987 ** 08 24 42.866 -57 10 42.25           ~ 1 0
5 TYC 8575-34-1 PM* 08 26 15.0385087464 -57 32 46.471786080   11.07 10.58     ~ 7 0
6 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
7 CD-43 6164 ** 10 20 31.8936 -43 58 26.710   12.44 11.71 11.58   ~ 7 0
8 [OPH2017] 271 ** 10 22 25.705 -44 16 13.26           ~ 1 0
9 TYC 7717-1049-1 PM* 10 26 44.3986885272 -42 19 19.642111716   13.62 12.29     ~ 9 0
10 [OPH2017] 3612 ** 10 26 49.236 -42 18 23.25           ~ 1 0
11 TYC 7717-1301-1 PM* 10 26 54.1981056672 -42 17 27.489002784   13.22 12.18     ~ 8 0
12 TYC 7721-1413-1 PM* 10 28 10.1534323944 -43 35 41.794373508   11.50 10.93     ~ 7 0
13 TYC 8223-550-1 PM* 11 46 07.3891827264 -48 48 34.823512980   12.47 11.71     ~ 5 0
14 [OPH2017] 3959 ** 11 49 07.266 -49 29 55.96           ~ 1 0
15 TYC 8224-2463-1 PM* 11 52 07.3354343136 -50 11 17.621907180   11.58 11.06     ~ 8 0
16 TYC 8241-1730-1 * 12 06 09.8167269504 -51 29 41.259507720   12.06 11.36     ~ 7 0
17 [OPH2017] 3027 ** 12 07 44.781 -51 11 02.19           ~ 1 0
18 TYC 8241-520-1 * 12 09 19.8879785400 -50 52 23.457164916   13.36 11.81     ~ 7 0
19 CD-50 6815 Or* 12 14 34.0907023656 -51 10 12.505288980   11.20 10.275   9.167 G9V 42 0
20 CD-49 7027 Or* 12 21 55.6590902616 -49 46 12.443074608   10.81 10.001   9.050 G9V 42 0
21 [OPH2017] 3 ** 12 30 09.077 -60 02 20.84           ~ 1 0
22 [OPH2017] 40 ** 13 31 50.714 -50 37 13.89           ~ 1 0
23 HD 117524 Or* 13 31 53.6065402944 -51 13 33.260046672   10.60 9.892   8.984 G8V 51 0
24 HD 119658 Y*O 13 45 41.9663522568 -49 04 58.971188640   9.65 9.22     F6V 24 0
25 TYC 9255-1021-1 PM* 13 55 55.6392042744 -73 51 03.445855632   11.52 10.79     ~ 7 0
26 TYC 9255-900-1 PM* 13 59 52.7510725440 -73 59 37.973333364   11.77 11.02     ~ 8 0
27 [OPH2017] 1223 ** 14 01 52.001 -73 02 15.99           ~ 1 0
28 TYC 9252-47-1 PM* 14 07 48.8973268128 -72 13 27.140911464   11.05 10.38     ~ 5 0
29 [OPH2017] 1220 ** 14 07 49.221 -73 15 14.21           ~ 1 0
30 TYC 9252-1432-1 PM* 14 15 46.1393477976 -72 30 49.273177896   11.53 11.00     ~ 5 0
31 TYC 7840-471-1 * 15 32 43.8778487664 -40 10 28.494441876   12.87 12.04     ~ 6 0
32 [OPH2017] 3496 ** 15 34 32.357 -40 38 19.36           ~ 1 0
33 CD-40 9778 * 15 36 20.9265378096 -41 06 09.655485516   10.40 9.94     G0 11 0
34 HD 144485 * 16 11 32.4136176600 -70 21 23.361163668   10.15 9.84     A9III 17 0
35 TYC 9277-2632-1 * 16 11 58.2066399000 -70 56 53.632897944   11.60 10.95     ~ 5 0
36 [OPH2017] 1313 ** 16 12 14.348 -70 35 03.13           ~ 1 0
37 TYC 9277-1055-1 * 16 12 30.6491964528 -70 13 12.010996740   12.72 11.60     ~ 6 0
38 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
39 [OPH2017] 237 ** 16 25 25.459 -70 31 43.07           ~ 1 0
40 HD 147714 * 16 29 03.6736968600 -70 30 08.375507208   9.45 9.21     A2mA5-A7 25 0
41 TYC 9050-745-1 * 16 42 24.0877108008 -67 27 48.850016724   12.43 11.96     ~ 7 0
42 [OPH2017] 3410 ** 16 42 24.660 -67 28 15.05           ~ 1 0
43 TYC 9050-255-1 * 16 42 25.2440856480 -67 28 41.005806456   11.58 11.19     ~ 7 0
44 HD 152751 ** 16 55 28.7575690 -08 20 10.787849 11.647 10.593 9.023 7.937 6.565 M3.5Ve 547 1
45 TYC 9047-751-1 PM* 17 08 19.1134276968 -64 11 59.282923596   12.96 11.60     ~ 6 0
46 [OPH2017] 3560 ** 17 18 30.645 -63 20 21.09           ~ 1 0
47 TYC 9057-4804-1 PM* 17 28 42.3547452048 -62 28 39.646762572   12.12 11.42     ~ 6 0
48 TYC 7971-356-1 * 20 42 42.7624942728 -42 01 01.633699992   12.43 12.77     ~ 5 0
49 [OPH2017] 4512 ** 20 44 42.205 -41 55 08.77           ~ 1 0
50 WASP-182 * 20 46 41.5599865128 -41 49 15.200400288   13.01 11.98     ~ 21 0
51 NAME Galactic Bar reg ~ ~           ~ 1458 0
52 NAME Hercules Stream MGr ~ ~           ~ 264 0
53 NAME Argus Association As* ~ ~           ~ 266 0
54 NAME HR 1614 Moving Group As* ~ ~           ~ 52 0

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