2019ApJ...872..152I

Query : 2019ApJ...872..152I

2019ApJ...872..152I - Astrophys. J., 872, 152-152 (2019/February-3)

The streams of the gaping abyss: a population of entangled stellar streams surrounding the inner Galaxy.

IBATA R.A., MALHAN K. and MARTIN N.F.

Abstract (from CDS):

We present the discovery of a large population of stellar streams that surround the inner Galaxy, found in the Gaia DR2 catalog using the new STREAMFINDER algorithm. Here we focus on the properties of eight new high-significance structures found at heliocentric distances between 1 and 10 kpc and at Galactic latitudes | b| > 20○, named Slidr, Sylgr, Ylgr, Fimbulthul, Svol, Fjorm, Gjoll, and Leiptr. Spectroscopic measurements of seven of the streams confirm the detections, which are based on Gaia astrometry and photometry alone, and show that these streams are predominantly metal-poor. The sample possesses diverse orbital properties, although most of the streams appear to be debris of inner-halo globular clusters. Many more candidate streams are visible in our maps but require follow-up spectroscopy to confirm their nature. We also explain in detail the workings of the algorithm and gauge the incidence of false detections by running the algorithm on a smooth model of the Gaia catalog.

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

Journal keyword(s): galaxies: formation - Galaxy: halo - Galaxy: stellar content - Galaxy: structure - surveys

Nomenclature: NAME Slidr Stream N=1. NAME Sylgr Stream N=1. NAME Ylgr Stream. NAME Fimulthul Stream N=1. NAME Svol Stream N=1. NAME Fjorm Stream N=1. NAME Gjoll Stream N=1. NAME Leiptr Stream N=1.

Simbad objects: 80

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Number of rows : 80
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 [MIM2018] Gaia-2 St* 00 42 -24.5           ~ 7 0
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 NGC 188 OpC 00 47 14.8 +85 14 42           ~ 990 0
4 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
5 Cl Berkeley 8 OpC 02 01 13.2 +75 29 27           ~ 28 0
6 Gaia DR3 3254112556278356608 * 04 22 19.5974121576 -00 51 49.843310220           ~ 3 0
7 Gaia DR3 3229373063616887936 * 04 39 10.3450561512 -01 32 10.248659556           ~ 3 0
8 SDSS J044820.30-051035.2 * 04 48 20.3011634688 -05 10 35.006087604           F9 4 0
9 Gaia DR3 3188058536245928576 * 04 51 23.5564850280 -06 45 31.233602880           ~ 3 0
10 UCAC4 418-007714 * 04 58 30.5352502152 -06 25 23.793990960   14.318 13.500 13.348   ~ 3 0
11 Gaia DR3 2985543956292701312 * 05 28 24.9966106608 -13 20 23.649540900           ~ 3 0
12 NAME Svol Stream St* 05 29 -29.0           ~ 10 0
13 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
14 UCAC4 310-009184 Pe* 05 56 26.8730031696 -28 11 20.713005060   13.674 12.676 12.484   ~ 6 0
15 NGC 2204 OpC 06 15 31.5 -18 40 28   9.35 8.6     ~ 172 0
16 NGC 2243 OpC 06 29 34.3 -31 16 58   10.12 9.4     ~ 298 0
17 NGC 2266 OpC 06 43 19.7 +26 58 35     9.5     ~ 82 0
18 Cl Melotte 66 OpC 07 26 19.2 -47 41 14   8.73       ~ 213 0
19 NGC 2420 OpC 07 38 24.6 +21 34 26   9.0 8.3     ~ 523 0
20 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
21 [MIM2018] Gaia-5 St* 09 42 +32.5           ~ 8 0
22 Gaia DR3 622997654963823872 * 09 56 20.8431900336 +16 56 18.201296724           ~ 2 0
23 Gaia DR3 621507438751096320 Pe* 10 08 17.8412048136 +14 45 30.657574728           ~ 3 0
24 Gaia DR3 3880967529959265408 * 10 12 17.7640266984 +13 02 18.934309608           ~ 3 0
25 SDSS J101552.74+133041.5 Pe* 10 15 52.7495978952 +13 30 41.539065480           ~ 6 0
26 Gaia DR3 3864009762123691648 * 10 31 28.0234451424 +09 03 01.224478008           ~ 2 0
27 UCAC4 476-048447 * 10 33 49.5726328080 +05 09 07.683487956   15.796 15.128 15.105   ~ 3 0
28 SDSS J104011.72+064231.9 Pe* 10 40 11.7280273272 +06 42 32.014404072           F5 5 0
29 UCAC4 485-052056 * 10 58 03.8563049544 +06 50 07.253329884   13.526 12.679 12.489   ~ 2 0
30 SDSS J105823.58+070500.2 Pe* 10 58 23.5853156760 +07 05 00.252071196           F5 4 0
31 [MIM2018] Gaia-4 St* 11 00 -07.0           ~ 7 0
32 Gaia DR3 3866743873880024064 * 11 01 24.3048358200 +08 44 52.904875776           ~ 2 0
33 Gaia DR3 3868120909114479104 * 11 01 48.2484233304 +10 13 40.985171328           ~ 3 0
34 SDSS J110207.95+090141.2 Pe* 11 02 07.9596673944 +09 01 41.199094308           A0 4 0
35 Gaia DR3 3815025973645798016 * 11 04 30.7034696760 +04 10 01.346374668           ~ 2 0
36 Gaia DR3 3815027485474285312 * 11 04 34.6793719872 +04 11 03.217454448           ~ 2 0
37 Gaia DR3 3867210513487025280 * 11 05 42.0728742864 +09 23 47.011265376           ~ 2 0
38 Gaia DR3 3815204021515092992 * 11 07 31.9561058664 +04 13 34.630430160           ~ 2 0
39 Gaia DR3 3565537675677236352 * 11 15 24.5242629192 -11 59 39.610086324           ~ 2 0
40 2MASS J11171158+0618229 Pe* 11 17 11.5819245144 +06 18 23.028705684           ~ 8 0
41 Gaia DR3 3565529983391595008 * 11 17 23.9819943120 -11 57 31.077903960           ~ 2 0
42 Gaia DR3 3817699397513377152 * 11 18 19.4425660416 +07 06 39.693794940           ~ 2 0
43 2MASS J11182319-1202329 RG* 11 18 23.1821229048 -12 02 32.996842188           F2 5 0
44 SDSS J112531.42+044707.7 Pe* 11 25 31.4242244856 +04 47 07.798379460           F5 4 0
45 Gaia DR3 3913758608831469568 * 11 25 48.6183272592 +08 10 28.013632752           ~ 2 0
46 Gaia DR3 3814120899482424192 * 11 26 42.0116183280 +05 49 35.709341772           ~ 2 0
47 [MIM2018] Gaia-3 St* 11 40 -23.5           ~ 7 0
48 UCAC4 461-050027 RG* 11 45 52.2576738480 +02 11 00.092307228   14.01 13.16 12.91   ~ 16 0
49 2MASS J12022092-0020387 Pe* 12 02 20.9151669240 -00 20 38.815915884           A0 4 0
50 SDSS J120825.36+002440.4 Pe* 12 08 25.3666717632 +00 24 40.489583112           A0 4 0
51 MGC 29718 * 12 09 16.9048529160 -00 14 29.419298268   18.97       ~ 3 0
52 [MIM2018] Gaia-1 St* 12 42 -10.0           ~ 12 0
53 Gaia DR3 3705106731065325184 * 13 01 19.0221072408 +04 52 43.284562392           ~ 2 0
54 Gaia DR3 3736843202192571264 Pe* 13 13 39.9408044016 +13 00 14.669270028           ~ 3 0
55 Gaia DR3 1447365289686803840 * 13 18 08.8152650064 +24 56 04.527020652           ~ 2 0
56 UCAC4 318-072201 * 13 21 09.9492120792 -26 30 59.013398088   13.633 12.611 12.481   ~ 3 0
57 Gaia DR3 1446309380567279232 * 13 22 54.1377202776 +23 59 04.595333352           ~ 2 0
58 SDSS J132417.73+323758.4 * 13 24 17.7258039600 +32 37 58.288653264           sdA 3 0
59 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
60 UCAC4 328-070194 * 13 29 52.8907514328 -24 26 21.924130776   14.025 13.181 13.036   ~ 3 0
61 Gaia DR3 1500316429651090304 * 13 47 29.8184882688 +40 58 05.589902532           ~ 2 0
62 Gaia DR3 1502042078790688000 * 13 49 18.8682591072 +42 36 33.502486140           ~ 2 0
63 Gaia DR3 1498981347656666752 * 13 54 23.5258192344 +42 14 45.738868704           ~ 2 0
64 Gaia DR3 1498889611451314816 * 13 56 52.3720539552 +41 27 44.553176928           ~ 3 0
65 NAME Fjorm Stream St* 15 20 +05.           ~ 20 0
66 Gaia DR3 1316460291439147648 * 15 59 12.3503820528 +26 43 49.487083968           ~ 2 0
67 M 12 GlC 16 47 14.18 -01 56 54.7     6.07     ~ 736 0
68 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 857 0
69 * b Aql PM* 19 24 58.1999714302 +11 56 39.888480530 6.35 5.93   4.7   G7IVHdel1 522 0
70 NGC 6939 OpC 20 31 40.6 +60 38 54           ~ 171 0
71 NAME Slidr Stream St* 20 46 -12.           ~ 11 0
72 NAME Phlegethon Stream St* 21 15 -19.1           ~ 23 0
73 NAME Jhelum Stream St* 21 25 -45.1           ~ 40 0
74 NAME GD-1 Stream St* 22 40 +31.           ~ 319 0
75 NAME Sylgr Stream St* 23 02 -14.           ~ 24 0
76 NAME Leiptr Stream St* ~ ~           ~ 11 0
77 NAME Fimbulthul Stream St* ~ ~           ~ 32 0
78 NAME Ylgr Stream St* ~ ~           ~ 12 0
79 NAME Gjoll Stream St* ~ ~           ~ 21 0
80 NAME Galactic Bar reg ~ ~           ~ 1458 0

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