2018MNRAS.481.3148E

Query : 2018MNRAS.481.3148E

2018MNRAS.481.3148E - Mon. Not. R. Astron. Soc., 481, 3148-3159 (2018/December-2)

Modelling the Tucana III stream - a close passage with the LMC.

ERKAL D., LI T.S., KOPOSOV S.E., BELOKUROV V., BALBINOT E., BECHTOL K., BUNCHER B., DRLICA-WAGNER A., KUEHN K., MARSHALL J.L., MARTINEZ-VAZQUEZ C.E., PACE A.B., SHIPP N., SIMON J.D., STRINGER K.M., VIVAS A.K., WECHSLER R.H., YANNY B., ABDALLA F.B., ALLAM S., ANNIS J., AVILA S., BERTIN E., BROOKS D., BUCKLEY-GEER E., BURKE D.L., CARNERO ROSELL A., CARRASCO KIND M., CARRETERO J., D'ANDREA C.B., DA COSTA L.N., DAVIS C., DE VICENTE J., DOEL P., EIFLER T.F., EVRARD A.E., FLAUGHER B., FRIEMAN J., GARCIA-BELLIDO J., GAZTANAGA E., GERDES D.W., GRUEN D., GRUENDL R.A., GSCHWEND J., GUTIERREZ G., HARTLEY W.G., HOLLOWOOD D.L., HONSCHEID K., JAMES D.J., KRAUSE E., MAIA M.A.G., MARCH M., MENANTEAU F., MIQUEL R., OGANDO R.L.C., PLAZAS A.A., SANCHEZ E., SANTIAGO B., SCARPINE V., SCHINDLER R., SEVILLA-NOARBE I., SMITH M., SMITH R.C., SOARES-SANTOS M., SOBREIRA F., SUCHYTA E., SWANSON M.E.C., TARLE G., TUCKER D.L. and WALKER A.R.

Abstract (from CDS):

We present results of the first dynamical stream fits to the recently discovered Tucana III stream. These fits assume a fixed Milky Way potential and give proper motion predictions, which can be tested with the upcoming Gaia Data Release 2 (DR2). These fits reveal that Tucana III is on an eccentric orbit around the Milky Way and, more interestingly, that Tucana III passed within 15 kpc of the Large Magellanic Cloud (LMC) approximately 75 Myr ago. Given this close passage, we fit the Tucana III stream in the combined presence of the Milky Way and the LMC. We find that the predicted proper motions depend on the assumed mass of the LMC and that the LMC can induce a substantial proper motion perpendicular to the stream track. A detection of this misalignment will directly probe the extent of the LMC's influence on our Galaxy, and has implications for nearly all methods which attempt to constraint the Milky Way potential. Such a measurement will be possible with the upcoming Gaia DR2, allowing for a measurement of the LMC's mass.

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

Journal keyword(s): Galaxy: evolution - Galaxy: kinematics and dynamics - galaxies: dwarf

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME Magellanic Stream HVC 00 32 -30.0           ~ 971 1
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12639 1
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11142 1
4 NAME Phoenix Stream St* 01 35.0 -49 53           ~ 42 0
5 NAME Sagittarius Stream St* 02 22 +00.0           ~ 874 0
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17424 0
7 NAME Gal Anticenter reg 05 46 +28.9           ~ 910 0
8 NGC 5466 GlC 14 05 27.29 +28 32 04.0     9.70     ~ 828 0
9 NAME Palomar 5 Stream St* 15 16 05 -00 06.7           ~ 103 0
10 NAME Serpens Dwarf GlC 15 16 05.30 -00 06 41.0   15.1       ~ 734 1
11 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14400 0
12 NAME Tucana III Stream St* 23 35 -59.7           ~ 11 0
13 NAME Tuc III G 23 56.6 -59 36           ~ 189 0
14 NAME ATLAS Stream St* ~ ~           ~ 34 0
15 NAME Orphan Stream St* ~ ~           ~ 253 0

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