2021ApJ...911..149L

Query : 2021ApJ...911..149L

2021ApJ...911..149L - Astrophys. J., 911, 149-149 (2021/April-3)

Broken into pieces: ATLAS and Aliqa Uma as one single stream.

LI T.S., KOPOSOV S.E., ERKAL D., JI A.P., SHIPP N., PACE A.B., HILMI T., KUEHN K., LEWIS G.F., MACKEY D., SIMPSON J.D., WAN Z., ZUCKER D.B., BLAND-HAWTHORN J., CULLINANE L.R., DA COSTA G.S., DRLICA-WAGNER A., HATTORI K., MARTELL S.L., SHARMA S. (The S5 Collaboration)

Abstract (from CDS):

We present the first spectroscopic measurements of the ATLAS and Aliqa Uma streams from the Southern Stellar Stream Spectroscopic Survey (S5), in combination with the photometric data from the Dark Energy Survey and astrometric data from Gaia. From the coherence of spectroscopic members in radial velocity and proper motion, we find that these two systems are extremely likely to be one stream with discontinuity in morphology and density on the sky (the "kink" feature). We refer to this entire stream as the ATLAS-Aliqa Uma stream, or the AAU stream. We perform a comprehensive exploration of the effect of baryonic substructures and find that only an encounter with the Sagittarius dwarf ∼0.5 Gyr ago can create a feature similar to the observed "kink." In addition, we also identify two gaps in the ATLAS component associated with the broadening in the stream width (the "broadening" feature). These gaps have likely been created by small mass perturbers, such as dark matter halos, as the AAU stream is the most distant cold stream known with severe variations in both the stream surface density and the stream track on the sky. With the stream track, stream distance, and kinematic information, we determine the orbit of the AAU stream and find that it has been affected by the Large Magellanic Cloud, resulting in a misalignment between the proper motion and stream track. Together with the Orphan-Chenab Stream, AAU is the second stream pair that has been found to be a single stream separated into two segments by external perturbation.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Tidal disruption - Stellar kinematics - Stellar motion - Stellar associations - Metallicity - Stellar abundances - Dark matter - Milky Way dark matter halo - Stellar streams - Milky Way dynamics

VizieR on-line data: <Available at CDS (J/ApJ/911/149): table1.dat table2.dat table3.dat>

Simbad objects: 146

goto Full paper

goto View the references in ADS

Number of rows : 146
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 KUV 00339-2042 HB* 00 36 26.3153160696 -20 25 07.052986812   16.5       BN 5 0
2 Gaia DR2 2362395599515154816 * 00 37 33.0844577579 -20 27 43.088636288           ~ 1 0
3 Gaia DR2 2350314513642106624 Pe* 00 39 33.6926415232 -20 50 21.075086296           ~ 1 0
4 CRTS J003953.8-205335 RR* 00 39 53.8754327328 -20 53 34.413226404   16.7 16.744     ~ 14 0
5 Gaia DR2 2350245137034340864 * 00 40 46.5190206024 -21 07 45.086821449           ~ 1 0
6 Gaia DR3 2350348972163836160 Pe* 00 44 36.4317642994 -21 28 48.889600713           ~ 1 0
7 Gaia DR2 2349548630777593344 Pe* 00 46 26.1949152521 -22 09 52.996955216           ~ 1 0
8 Gaia DR2 2349572579516107264 * 00 46 37.1491651976 -21 49 02.078849647           ~ 1 0
9 Gaia DR3 2349268564550587904 RG* 00 48 54.9710347931 -22 44 58.047214776           ~ 2 0
10 Gaia DR3 2349229398743966976 * 00 52 27.8224512184 -22 47 32.052148704           ~ 2 0
11 Gaia DR2 2349229330024490496 * 00 52 29.1893639284 -22 48 16.744935455           ~ 1 0
12 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
13 HE 0050-2253 HB* 00 52 38.7742830168 -22 36 58.471582608   17.3 17.0     ~ 3 0
14 Gaia DR3 2346224467824940544 RG* 00 52 59.3379752495 -22 54 15.575475408           ~ 2 0
15 Gaia DR2 2346231507276516864 * 00 52 59.5808939511 -22 50 57.763626051           ~ 1 0
16 Gaia DR2 2346221405513412096 * 00 53 02.4987577184 -22 55 49.432027436           ~ 1 0
17 CRTS J005554.3-231507 RR* 00 55 54.2960192928 -23 15 06.824409948     17.09     ~ 8 0
18 Gaia DR3 2345957664457105408 RG* 00 58 40.0795224160 -23 51 49.660783170           ~ 2 0
19 Gaia DR2 2344905255735090944 * 01 03 29.9598933155 -24 41 22.943186512           ~ 1 0
20 Gaia DR3 5034947868558961408 * 01 09 16.3098013493 -25 08 22.755124560           ~ 2 0
21 Gaia DR3 5040976937490509184 RG* 01 11 13.0258093521 -24 44 48.247564956           ~ 3 0
22 Gaia DR2 5040672574632257920 * 01 12 14.5566913583 -25 43 39.292545710           ~ 1 0
23 Gaia DR3 5040671754294144512 RG* 01 12 21.8410792148 -25 44 52.145393711           ~ 3 0
24 Gaia DR3 5034653611759500160 Pe* 01 12 32.4528525070 -25 51 57.004218445           ~ 2 0
25 Gaia DR3 5033893299468726656 Pe* 01 13 15.7926120864 -26 06 45.310316885           ~ 1 0
26 CRTS J011437.1-263257 RR* 01 14 37.1945947872 -26 32 56.866766496     17.09     ~ 7 0
27 Gaia DR2 5039937417965798656 RR* 01 14 52.7302988136 -25 38 57.037358004           ~ 5 0
28 Gaia DR3 5039838702437479936 RG* 01 16 27.0969959494 -26 07 00.936166752           ~ 3 0
29 Gaia DR3 5040039054071916672 Pe* 01 16 42.2340192441 -25 22 07.445599204           ~ 1 0
30 Gaia DR3 5039851312461480960 Pe* 01 17 18.4150665318 -26 05 39.122931655           ~ 2 0
31 Gaia DR2 5039641305740677888 * 01 18 31.2124140446 -26 22 36.992965148           ~ 1 0
32 Gaia DR3 5039633604864050048 * 01 18 42.9167657218 -26 35 28.156910494           ~ 2 0
33 Gaia DR3 5036538552646587904 Pe* 01 21 28.6296681133 -27 12 41.299678031           ~ 2 0
34 Gaia DR2 5036441207212180096 * 01 22 26.6330529798 -27 42 22.099652872           ~ 1 0
35 Gaia DR3 5036649942622417792 Pe* 01 22 54.8954928876 -26 42 22.918730517           ~ 2 0
36 Gaia DR3 5036681832755426560 Pe* 01 24 28.6898132612 -26 25 18.115847726           ~ 1 0
37 Gaia DR3 5036582979788129024 Pe* 01 25 08.0883736960 -27 00 52.165308490           ~ 2 0
38 Gaia DR2 5036379634560730368 * 01 25 14.8708152260 -27 22 26.524504971           ~ 1 0
39 Gaia DR3 5036381597361539712 Pe* 01 25 26.1182517497 -27 18 32.176585879           ~ 2 0
40 2QZ J012723.4-275214 * 01 27 23.4465952728 -27 52 13.507673088           ~ 3 0
41 Gaia DR3 5036293464632658048 Pe* 01 27 37.4956096927 -27 49 00.556563167           ~ 2 0
42 Gaia DR2 5035461885949017984 * 01 30 23.5375196713 -28 13 51.571664760           ~ 1 0
43 NAME Cetus-Palca Stream St* 01 31 +01.0           ~ 97 1
44 Gaia DR3 5023147153855340416 * 01 34 40.8843406208 -29 15 51.169354361           ~ 2 0
45 Gaia DR3 5022762599663670784 Pe* 01 36 18.2230860832 -30 10 47.083944963           ~ 2 0
46 Gaia DR2 5023099561321815808 Pe* 01 37 22.0210693544 -29 30 12.762499839           ~ 1 0
47 Gaia DR2 5022900068681337344 * 01 38 36.9687612059 -29 41 21.919737140           ~ 1 0
48 Gaia DR3 5022841901939606144 Pe* 01 39 49.5744115674 -29 58 25.919905220           ~ 2 0
49 Gaia DR3 5022844307121290752 RG* 01 40 08.6709089660 -29 52 14.546299303           ~ 3 0
50 Gaia DR3 5022824584631471872 Pe* 01 40 28.2687610178 -30 07 27.718146501           ~ 1 0
51 Gaia DR3 5022074919564478208 * 01 41 27.6380918046 -30 06 39.932036163           ~ 2 0
52 Gaia DR2 5022052482655230208 * 01 42 25.4812150988 -30 23 50.769998797           ~ 1 0
53 Gaia DR3 5022381653244104704 * 01 43 00.2354811622 -30 19 42.995630966           ~ 2 0
54 Gaia DR3 5022383646108929280 Pe* 01 43 04.5102907850 -30 15 47.428508019           ~ 2 0
55 Gaia DR3 5022162060156193536 Pe* 01 45 45.5876329781 -30 38 31.538194407           ~ 1 0
56 Gaia DR3 5019037312534021376 Pe* 01 50 39.1420795299 -31 20 04.960531737           ~ 2 0
57 Gaia DR3 5018779653152167168 Pe* 01 51 48.4745555611 -32 09 42.137844369           ~ 2 0
58 HE 0150-3206 HB* 01 52 22.5747771252 -31 51 15.089515642   17.6 17.6     ~ 3 0
59 Gaia DR2 5018746526068215424 Pe* 01 54 47.0005542458 -32 04 42.745941295           ~ 1 0
60 Gaia DR3 5018088777596976512 Pe* 01 55 37.6368382768 -32 04 56.526667148           ~ 2 0
61 Gaia DR3 5017989409233601280 Pe* 01 55 46.1945254988 -32 15 56.514268823           ~ 2 0
62 Gaia DR2 5018090839181310720 * 01 55 54.7476407792 -32 01 27.468689198           ~ 1 0
63 Gaia DR3 5018070605590948864 Pe* 01 56 38.8042175291 -32 16 22.283011195           ~ 2 0
64 Gaia DR3 5018003535381679488 Pe* 01 58 12.7134928748 -32 29 27.106164474           ~ 2 0
65 Gaia DR2 5017997453707993856 Pe* 01 58 28.0224708860 -32 40 22.306178605           ~ 1 0
66 Gaia DR3 5018005734404964224 Pe* 01 58 55.6949685372 -32 29 49.470491053           ~ 2 0
67 Gaia DR3 5017626368534547456 Pe* 01 59 00.3303562609 -33 36 35.788352589           ~ 1 0
68 Gaia DR2 5017616709150967296 * 01 59 25.7023925891 -33 33 26.322814832           ~ 1 0
69 Gaia DR3 5017812216062240512 Pe* 01 59 36.3814704809 -32 40 54.453730686           ~ 2 0
70 Gaia DR3 5017800465031716480 Pe* 02 00 22.9514875505 -32 41 13.736436955           ~ 2 0
71 Gaia DR3 5017720033181172352 * 02 00 32.5764949960 -33 16 33.031265335           ~ 2 0
72 Gaia DR2 5017850630250382976 * 02 00 42.3520519742 -32 17 28.119723989           ~ 1 0
73 Gaia DR2 5017834000136971520 * 02 01 05.6895324586 -32 25 09.089362155           ~ 2 0
74 Gaia DR2 4969675871876088832 * 02 01 17.4921781075 -33 27 05.518140406           ~ 2 0
75 NAME Whiting 1 GlC 02 02 56.8 -03 15 10           ~ 177 0
76 Gaia DR3 4969704630977398528 * 02 03 05.1943790185 -33 18 21.088937124           ~ 2 0
77 Gaia DR2 4969612791693200512 * 02 03 36.1835537089 -33 43 26.002213754           ~ 1 0
78 Gaia DR2 4969689276470827904 * 02 04 03.8901426032 -33 24 15.627603380           ~ 2 0
79 Gaia DR3 4971220071534578048 Pe* 02 04 41.4371588402 -32 50 29.932546921           ~ 2 0
80 Gaia DR2 4969625363061537536 * 02 05 06.7145562673 -33 31 19.896806283           ~ 1 0
81 NAME Aliqa Uma Stream St* 02 07 -31.5           ~ 33 0
82 Gaia DR3 5019461998900236032 * 02 07 17.4926307700 -31 21 19.165023243           ~ 2 0
83 Gaia DR2 4971347026471042816 Pe* 02 07 34.4243586257 -32 13 58.685049613           ~ 1 0
84 Gaia DR2 5019443856958262016 Pe* 02 07 36.9189339025 -31 32 13.469461940           ~ 1 0
85 Gaia DR3 4971172998693117824 Pe* 02 07 56.1054155436 -32 52 26.208388293           ~ 1 0
86 Gaia DR3 4970977178247907072 * 02 08 12.5568071948 -33 07 29.870112427           ~ 2 0
87 Gaia DR3 4971343045037499648 Pe* 02 08 25.5356334550 -32 18 41.969736428           ~ 1 0
88 Gaia DR3 4971176778264340352 RG* 02 09 08.2952473031 -32 46 06.116255520           ~ 2 0
89 Gaia DR3 4971328167270778496 RG* 02 09 58.9156805296 -32 05 39.984614403           ~ 2 0
90 Gaia DR2 4971762951104394112 * 02 10 44.6896306241 -31 42 45.805428386           ~ 2 0
91 Gaia DR3 4970235699391286016 * 02 13 05.7925780172 -33 32 06.643017300           ~ 2 0
92 Gaia DR2 4971029959102390656 Pe* 02 13 08.3487801916 -32 57 02.289171267           ~ 1 0
93 Gaia DR2 4970244873441388160 Pe* 02 13 47.0876040551 -33 19 18.125877820           ~ 1 0
94 Gaia DR2 4970145676876849664 Pe* 02 14 58.3564169905 -34 07 57.064405013           ~ 1 0
95 Gaia DR2 4969841627550660608 Pe* 02 15 37.3984078358 -34 35 57.845719497           ~ 1 0
96 Gaia DR3 4969961611757057536 RG* 02 16 18.9242719809 -34 06 22.905361848           ~ 2 0
97 Gaia DR2 4969992221987294976 * 02 16 44.8845746466 -33 50 25.510466080           ~ 1 0
98 Gaia DR3 4969997517683640832 Pe* 02 18 13.4162176604 -33 42 20.762151966           ~ 1 0
99 Gaia DR3 4969932298603707776 * 02 19 02.1780838156 -33 57 47.068076034           ~ 2 0
100 Gaia DR3 4970601905482914048 Pe* 02 19 10.8999194269 -33 07 16.324591014           ~ 1 0
101 Gaia DR3 4966867208079439616 Pe* 02 19 25.9058446003 -34 44 50.495549223           ~ 1 0
102 Gaia DR2 4970326404802896896 * 02 21 44.0083723111 -33 39 53.464982250           ~ 1 0
103 Gaia DR2 4966510618417939328 * 02 22 33.1125329284 -35 58 42.675204682           ~ 1 0
104 Gaia DR2 4966617580283904256 * 02 23 27.5632357243 -35 15 51.263219518           ~ 1 0
105 Gaia DR2 4967189360690011648 * 02 23 28.4499013984 -34 52 35.833246604           ~ 1 0
106 Gaia DR2 4966621153696736128 * 02 23 52.7930211121 -35 05 37.804338800           ~ 1 0
107 Gaia DR2 4966550239493164160 * 02 25 05.1233802496 -35 30 58.077394128           ~ 1 0
108 Gaia DR2 4967031305893516160 Pe* 02 25 51.2015740281 -34 40 35.575001169           ~ 1 0
109 Gaia DR2 4965675882934008576 * 02 26 17.6437774754 -36 27 13.315375951           ~ 1 0
110 Gaia DR3 4966915105554905344 RG* 02 26 26.1986683554 -35 22 26.122034542           ~ 2 0
111 Gaia DR2 4966908160590759552 Pe* 02 26 32.7254806117 -35 35 35.547644594           ~ 1 0
112 Gaia DR2 4966965300835914368 * 02 26 52.5793111331 -34 57 32.179370610           ~ 1 0
113 Gaia DR3 4966144274887456512 * 02 28 26.3685826637 -35 42 24.332734781           ~ 2 0
114 Gaia DR2 4966098129758824064 * 02 29 01.2854230350 -35 42 42.672386759           ~ 2 0
115 Gaia DR3 4965425507816824192 Pe* 02 30 10.1987454392 -37 01 46.192438321           ~ 1 0
116 Gaia DR3 4965873558805479040 Pe* 02 30 10.7556294056 -36 22 48.043302344           ~ 1 0
117 Gaia DR2 4965882144443385600 Pe* 02 30 49.9239143481 -36 13 47.661893704           ~ 1 0
118 Gaia DR2 4965792362447281920 * 02 32 28.3875249489 -36 49 47.691576776           ~ 2 0
119 CRTS J023258.0-354853 RR* 02 32 58.0825551960 -35 48 53.366704524     17.74     ~ 8 0
120 Gaia DR3 4953695608534281088 RG* 02 35 26.1331652961 -37 22 30.162129560           ~ 2 0
121 Gaia DR3 4953742509577115520 Pe* 02 36 32.8102062166 -37 00 14.859226519           ~ 1 0
122 Gaia DR2 4953456632257474048 * 02 38 20.4096380631 -37 51 10.886975424           ~ 1 0
123 Gaia DR2 4953608193063838208 * 02 38 57.0605002566 -37 29 04.243538646           ~ 1 0
124 Gaia DR2 4953614790133671168 * 02 38 57.7226486936 -37 16 41.227519540           ~ 1 0
125 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
126 Gaia DR2 4953548823731740160 * 02 41 25.2614167713 -37 34 17.230884239           ~ 1 0
127 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
128 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
129 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
130 NGC 5824 GlC 15 03 58.612 -33 04 06.70   10.28 9.56     ~ 441 0
131 NAME Palomar 5 Stream St* 15 16 05 -00 06.7           ~ 132 0
132 Cl Pal 5 GlC 15 16 05.30 -00 06 41.0   15.1       ~ 797 1
133 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
134 NAME Ophiuchus Stream St* 16 07 12.0 -06 55 30           ~ 38 0
135 NGC 6229 GlC 16 46 58.641 +47 31 36.38   9.38 9.86     ~ 397 0
136 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
137 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
138 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
139 NAME Orphan Stream St* 19 09 -23.           ~ 281 0
140 Cl Terzan 8 GlC 19 41 44.41 -33 59 58.1     11.54     ~ 357 0
141 NAME Chenab Stream St* 21 17 -59.9           ~ 45 0
142 NAME Jhelum Stream St* 21 25 -45.1           ~ 40 0
143 Cl Pal 12 GlC 21 46 38.84 -21 15 09.4     11.89     ~ 548 0
144 NAME GD-1 Stream St* 22 40 +31.           ~ 319 0
145 NGC 7492 GlC 23 08 26.68 -15 36 41.3     10.48     ~ 330 0
146 NAME ATLAS Stream St* ~ ~           ~ 44 0

To bookmark this query, right click on this link: simbad:objects in 2021ApJ...911..149L and select 'bookmark this link' or equivalent in the popup menu