2019ApJ...886L...7M

Query : 2019ApJ...886L...7M

2019ApJ...886L...7M - Astrophys. J., 886, L7-L7 (2019/November-3)

Phase-space correlation in stellar streams of the Milky Way halo: the CLASH of Kshir and GD-1.

MALHAN K., IBATA R.A., CARLBERG R.G., BELLAZZINI M., FAMAEY B. and MARTIN N.F.

Abstract (from CDS):

We report the discovery of a 70○ long stellar stream in the Milky Way halo, which criss-crosses the well known "GD-1" stream. We show that this new stellar structure ("Kshir") and GD-1 lie at similar distance, and are remarkably correlated in kinematics. We propose several explanations for the nature of this new structure and its possible association with GD-1. However, a scenario in which these two streams were accreted onto the Milky Way within the same dark matter sub-halo seems to provide a natural explanation for their phase-space entanglement, and other complexities of this coupled system.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): Globular star clusters - Dark matter - Stellar kinematics - Milky Way stellar halo

Nomenclature: NAME Kshir Stream N=1.

Simbad objects: 22

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Number of rows : 22
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 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 216 0
2 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
3 Gaia DR3 3878963880470887808 * 09 51 51.4425687888 +09 39 18.123111684           ~ 1 0
4 Gaia DR3 642351018118084864 * 10 01 17.7612944400 +23 44 04.353461268           ~ 1 0
5 Gaia DR3 726700872981157504 * 10 12 12.9842653632 +25 06 31.471989156           ~ 1 0
6 Gaia DR3 739234618343073920 * 10 12 25.9959900264 +26 35 36.460623408           ~ 1 0
7 Gaia DR3 754024394061798400 * 10 18 56.7432189864 +37 09 54.878375880           ~ 1 0
8 Gaia DR3 755942247282941568 * 10 25 14.6109792912 +39 17 16.512038772           ~ 1 0
9 Gaia DR3 728925322443127680 * 10 26 33.6885114624 +27 54 56.731150188           ~ 1 0
10 Gaia DR3 747639839276885888 Pe* 10 31 23.0126865312 +30 35 53.795732820           ~ 2 0
11 Gaia DR3 748470928333188736 * 10 33 03.0592103928 +32 35 06.955984788           ~ 1 0
12 Gaia DR3 781049286065800704 * 10 46 08.8268043360 +43 27 22.254937200           ~ 1 0
13 Gaia DR3 781071207579013248 * 10 48 34.6587857904 +43 44 18.416635980           ~ 1 0
14 Gaia DR3 1678280186267133184 * 13 19 43.0172047584 +66 05 29.820102612           ~ 1 0
15 SDSS J132608.60+671718.3 * 13 26 08.6096775432 +67 17 18.330118332           G0 3 0
16 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
17 Gaia DR3 1672820565575158528 * 13 43 31.0234301856 +67 34 31.000305216           ~ 2 0
18 Gaia DR3 1671715174136055936 * 14 01 45.3893559000 +66 06 44.892889272           ~ 1 0
19 UCAC4 791-025382 * 15 21 31.4776342104 +68 10 00.213560796   14.147 12.808 12.528   ~ 2 0
20 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
21 NAME GD-1 Stream St* 22 40 +31.           ~ 319 0
22 NAME Kshir Stream St* ~ ~           ~ 12 0

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