2014A&A...566A.118D


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST03:06:44

2014A&A...566A.118D - Astronomy and Astrophysics, volume 566A, 118-118 (2014/6-1)

A comprehensive view of the Virgo stellar stream.

DUFFAU S., VIVAS A.K., ZINN R., MENDEZ R.A. and RUIZ M.T.

Abstract (from CDS):

To explore the complex halo substructure that has been reported in the direction of the Virgo constellation, radial velocities and metallicities have been measured for 82 RR Lyrae stars (RRLS) that were identified by the QUEST survey. These stars are distributed over 90 square degrees of the sky, and lie from 4 to 23 kpc from the Sun. Using an algorithm for finding groups in phase space and modeling the smooth halo component in the region, we identified the 5 most significant RRLS groups, some of which were previously known or suspected. We have examined the SEKBO and the Catalina catalog of RRLS (with available spectroscopic measurements), as well as the bright QUEST RRLS sample, the catalog of Red Giant stars from the Spaghetti survey, and three recent catalogs of blue horizontal branch (BHB) stars, for stars that may be related to the QUEST RRLS groups. The most significant group of RRLS is the Virgo stellar stream (VSS) identified here as group A, which is composed of at least 10 RRLS and 3 BHB stars. It has a mean distance of 19.6kpc and a mean radial velocity Vgsr=128km/s, as estimated from its RRLS members. With the revised velocities reported here, there is no longer an offset in velocity between the RRLS in the VSS and the prominent peak in the velocities of main-sequence turnoff stars reported by other researchers in the same direction and at a similar distance (known as S297+63-20.5). The location in phase space of two other groups (F and H) suggests a possible connection with the VSS, which cannot be discarded at this point, although the turnoff colors of the VSS and group H, as identified from other works, suggest they might be composed of different populations. Two more groups, B and D, are found at mean distances of 19.0 and 5.7kpc, and mean radial velocities of Vgsr=-94 and 32km/s. The latter is the more numerous in terms of total members, as well as the more extended in RA. A comparison with the latest model of the disruption of the Sagittarius dwarf, indicates that none of the above groups is related to it. Rather than being the result of a single accretion event, the excess of stars observed in Virgo appears to be composed of several halo substructures along the same line of sight.

Abstract Copyright:

Journal keyword(s): stars: variables: RR Lyrae - Galaxy: abundances - Galaxy: halo - Galaxy: kinematics and dynamics - Galaxy: structure

VizieR on-line data: <Available at CDS (J/A+A/566/A118): table1.dat table5.dat table6.dat table8.dat table9.dat>

Nomenclature: Table 6: [DVZ2014] NNN N=25 among (Nos 716-757).

Simbad objects: 116

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Number of rows : 116

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * 6 Cet PM* 00 11 15.8508998160 -15 28 04.740699873 5.35 5.38 4.89     F8VFe-0.8CH-0.5 284 0
2 HD 3268 PM* 00 35 54.8016116423 +13 12 25.449821062   6.93   6.0   F7V 87 0
3 * 38 Cet PM* 01 14 49.1720452098 -00 58 25.663213221   6.12 5.69     F3V 103 0
4 * eta Ari PM* 02 12 48.0856782200 +21 12 39.577562642       5.0   F5V 173 0
5 BPS CS 22175-0034 * 02 20 21.5102848036 -10 38 08.938022811   12.97 12.60     ~ 9 0
6 NAME Sgr Stream St* 02 22 +00.0           ~ 645 0
7 * tet Per PM* 02 44 11.9870420 +49 13 42.411120 4.62 4.62 4.11 3.67 3.37 F8V 378 2
8 * 94 Cet PM* 03 12 46.4369076602 -01 11 45.949836281   5.631 5.070     F8.5V 402 1
9 LP 772-81 PM* 03 14 53.7607737107 -14 43 53.824643284   14.13 13.79     ~ 8 0
10 HD 22413 PM* 03 35 24.7144593510 -28 20 11.751742012   9.08 8.81     A9V 38 0
11 * 10 Tau PM* 03 36 52.1448022536 +00 23 58.536917738 5.23 5.15 4.30 4.09 3.77 F9IV-V 522 0
12 HD 22879 Pe* 03 40 22.0654223510 -03 13 01.124769689 7.146 7.222 6.667 6.346 6.016 G0VmF2 434 0
13 HD 49933 ** 06 50 49.831 -00 32 27.18           F3V 326 1
14 HD 65925 ** 07 59 28.3656952 -39 17 49.007727   5.605 5.224     F3V 53 0
15 HD 74000 PM* 08 40 50.8038415228 -16 20 42.513275817 9.84 10.09 9.66     F2 243 0
16 HD 74438 * 08 41 46.5773782488 -53 03 44.998857473   7.81 7.58     A2mA5-A8 44 0
17 * del Pyx PM* 08 55 31.5596844828 -27 40 54.690384252   5.00 4.89     A3IV 47 0
18 * G Car SB* 09 05 08.8130929 -72 36 09.743658   5.069 4.467     F8II+DA 67 0
19 * bet Vir PM* 11 50 41.7182390 +01 45 52.991019 4.26 4.15 3.60 3.13 2.85 F9V 856 0
20 [DCD2013] CSS J115316.3-032543 RR* 11 53 16.4244902268 -03 25 43.753245807     16.67     ~ 6 0
21 [SHM2017] J178.64802-04.23068 RR* 11 54 35.5150002239 -04 13 50.423472819     15.75     ~ 4 0
22 LINEAR 2568913 RR* 11 55 10.5426899471 -02 26 40.001202430     16.82     ~ 8 0
23 V* V357 Vir RR* 11 55 34.3952085396 -00 36 01.855866884     16.76     ~ 14 0
24 LINEAR 2574370 RR* 11 55 36.1812658821 -02 54 07.991970309     15.55     ~ 7 0
25 LINEAR 2669011 RR* 11 56 42.1059192635 -03 28 10.933877380     15.45     ~ 8 0
26 LINEAR 2667036 RR* 11 58 35.7314169356 -03 11 01.615140003     16.85     ~ 7 0
27 [SHM2017] J179.72859-04.23682 RR* 11 58 54.8551528259 -04 14 12.619421630     16.74     ~ 5 0
28 V* V364 Vir RR* 12 00 44.3908221826 -00 42 45.108248710     16.66     ~ 9 0
29 [ZHV2014] 412 RR* 12 00 47.9367448109 +00 46 11.005400812     17.25     ~ 8 0
30 V* V366 Vir RR* 12 01 35.3629127153 -00 14 05.261243591     15.97     ~ 8 0
31 GUVV J120136.9-033328.1 RR* 12 01 36.9569424971 -03 33 28.563748255   17.66 17.26 17.41 17.28 ~ 8 0
32 V* V367 Vir RR* 12 02 31.7754934108 -01 53 44.660974363     16.25     ~ 12 0
33 [ZHV2014] 427 RR* 12 03 27.4328872953 -03 15 45.074956572     16.66     ~ 7 0
34 V* V368 Vir RR* 12 04 20.9307308197 -02 10 42.190807039     16.40     ~ 10 0
35 V* V369 Vir RR* 12 04 50.9972204476 -00 21 06.583288626     17.01     ~ 8 0
36 CRTS J120516.2-040549 RR* 12 05 16.2192094994 -04 05 49.659232100     16.63     ~ 3 0
37 V* V370 Vir RR* 12 06 04.1332282950 -02 12 57.381035322     15.14     ~ 14 0
38 [ZHV2014] 444 RR* 12 06 31.4824783325 -03 16 23.106811871   16.1 15.93     ~ 8 0
39 HD 105183 HS* 12 06 47.2351675221 +11 40 12.658737086   10.93 11.06     sdB8IIIHe2 104 0
40 V* V372 Vir RR* 12 07 38.6932735686 -00 45 10.175790182     15.92     ~ 8 0
41 V* V373 Vir RR* 12 08 00.3807110709 -01 12 34.054688733     15.79     ~ 12 0
42 V* V374 Vir RR* 12 08 31.3708020767 -00 47 17.720664558     16.93     ~ 11 0
43 V* V376 Vir RR* 12 09 15.7190683313 -01 54 44.306205690     15.56     ~ 12 0
44 [ZHV2014] 467 RR* 12 10 20.9999212004 -02 44 34.140331008     16.90     ~ 5 0
45 V* V378 Vir RR* 12 11 32.0286878814 -01 52 36.139550261     14.88     ~ 10 0
46 V* V380 Vir RR* 12 12 15.4639733932 -01 21 13.197670282     15.25     ~ 10 0
47 [IGF2000] 21 RR* 12 13 29.6396289289 -01 01 51.863663886     17.46     ~ 11 0
48 [ZHV2014] 495 RR* 12 15 24.1977747402 -03 38 43.021114162     17.12 17.10   ~ 7 0
49 V* V381 Vir RR* 12 15 27.7928872326 -00 52 56.551062960     16.01     ~ 13 0
50 V* V382 Vir RR* 12 15 51.6525424622 -00 05 54.861013859     16.75     ~ 12 0
51 [SHM2017] J184.39527-04.09841 RR* 12 17 34.8704299573 -04 05 54.428377068     16.17     ~ 4 0
52 V* V385 Vir RR* 12 18 43.0419460541 -00 42 38.643320163     17.13     ~ 9 0
53 NAME Vir Z G 12 20 19.2 -01 21 00           ~ 3 0
54 LINEAR 3592837 RR* 12 23 03.5307193408 -03 35 16.346974659     15.25     ~ 9 0
55 V* V389 Vir RR* 12 23 10.8771830272 -00 16 57.836803447     16.65     ~ 10 0
56 V* V390 Vir RR* 12 24 15.6619760094 -01 49 14.361861086     17.02 16.83   ~ 13 0
57 V* V392 Vir RR* 12 24 19.9100531938 -00 13 38.728605445     17.03     ~ 11 0
58 LINEAR 3805831 RR* 12 26 20.6554773753 -02 26 46.301306986     17.22     ~ 8 0
59 V* V396 Vir RR* 12 27 43.2986774556 -00 57 55.068307435     17.14     ~ 10 0
60 V* V397 Vir RR* 12 27 48.1736547571 -00 58 46.277748519     16.61     ~ 11 0
61 V* V398 Vir RR* 12 28 03.8615535848 -01 14 54.654848927     15.23     ~ 8 0
62 V* V400 Vir RR* 12 29 10.5365087584 -01 33 59.699352581     15.07     ~ 11 0
63 NAME Virgo Region reg 12 30.8 +12 23           ~ 120 1
64 V* V402 Vir RR* 12 31 33.3372765728 -00 20 10.275937737     16.87 16.71   ~ 12 0
65 V* V404 Vir RR* 12 31 47.1839377217 -00 53 04.040490326     16.45     ~ 9 0
66 [MRS2008] 188.301727-02.924301 RR* 12 33 12.4253909953 -02 55 26.938518835     16.77     ~ 11 0
67 [MRS2008] 188.455414-02.749273 RR* 12 33 49.3100993056 -02 44 56.807907177     16.75     ~ 12 0
68 V* V405 Vir RR* 12 34 53.4782067416 -00 18 00.351869596     16.31     ~ 10 0
69 [ZHV2014] 636 RR* 12 36 33.4537085339 -03 25 48.377327070     16.72     ~ 6 0
70 LINEAR 4139829 RR* 12 37 32.5831331459 -02 44 03.981352622     16.65     ~ 8 0
71 LINEAR 4229566 RR* 12 37 56.9115791023 -03 38 08.498462953     15.94     ~ 6 0
72 V* V407 Vir RR* 12 39 49.4537931143 -00 00 06.452378465     16.93     ~ 12 0
73 V* V408 Vir RR* 12 40 03.5428123004 -00 04 09.569637267     16.93     ~ 13 0
74 [NYR2002] S297+63-20.5 reg 12 41 +00.0           ~ 16 0
75 [IGF2000] 31 RR* 12 41 36.6585007015 +01 13 06.368443998     17.20     ~ 7 0
76 V* BS Vir RR* 12 41 39.8066353503 -01 49 49.110633418     13.95     ~ 15 0
77 V* V410 Vir RR* 12 42 11.1665065258 -01 33 39.828727043     16.39     ~ 9 0
78 V* V411 Vir RR* 12 42 24.9110084620 -00 12 03.099733174     14.53     ~ 16 0
79 LINEAR 7601233 RR* 12 43 36.3492049700 -03 20 46.656354147     15.92     ~ 9 0
80 V* BT Vir RR* 12 43 51.2256663923 -01 23 14.393559488     14.95     ~ 15 0
81 V* V413 Vir RR* 12 44 07.1220437570 -00 56 49.106272116     16.26     ~ 10 0
82 [ZHV2014] 698 RR* 12 44 20.1492146875 -03 21 37.958428188     16.92     ~ 6 0
83 LINEAR 4539471 RR* 12 44 21.2046289609 -02 35 07.469940657     15.96     ~ 8 0
84 V* BU Vir RR* 12 44 29.7014794951 -02 04 50.170647998     14.53     ~ 15 0
85 V* V414 Vir RR* 12 44 50.1331379756 -00 50 39.689495155     14.80     ~ 11 0
86 V* V417 Vir RR* 12 46 14.8478678515 -01 03 11.998072285     16.54     ~ 10 0
87 V* V418 Vir RR* 12 46 48.0748291506 -02 07 18.961373244     15.44     ~ 11 0
88 V* V421 Vir RR* 12 49 14.5468399156 -00 49 25.499731779     16.83     ~ 9 0
89 V* V422 Vir RR* 12 51 02.3192903423 -00 45 12.740345672     17.04     ~ 10 0
90 V* V423 Vir RR* 12 52 05.3699601742 -02 00 07.166743997     16.64     ~ 12 0
91 V* V424 Vir RR* 12 52 08.7325514288 -00 29 31.727389398     15.47     ~ 15 0
92 V* V426 Vir RR* 12 52 44.5962220368 -00 25 12.883606704     15.45     ~ 15 0
93 CRTS J125331.2-035626 RR* 12 53 31.2880822141 -03 56 26.883025422     14.52     ~ 3 0
94 V* V427 Vir RR* 12 53 32.5324727578 -02 08 29.654384766     14.12     ~ 11 0
95 V* V428 Vir RR* 12 55 02.0308299782 -02 02 54.624248234     16.61     ~ 10 0
96 V* V429 Vir RR* 12 55 06.0418877579 -00 05 42.458084534     15.99     ~ 12 0
97 V* V431 Vir RR* 12 56 00.9250018794 -00 14 49.882875456     16.79     ~ 6 0
98 V* V433 Vir RR* 12 56 43.9189810568 -01 01 50.307194153     16.09     ~ 11 0
99 V* V435 Vir RR* 12 57 57.7362843450 -00 58 56.566311164     17.01     ~ 8 0
100 V* V436 Vir RR* 12 58 03.1034157209 -02 00 33.907282086     16.80     ~ 10 0
101 V* V443 Vir RR* 13 03 13.6264526918 -01 22 22.089571347     14.67     ~ 6 0
102 V* V453 Vir RR* 13 11 15.6463166542 -00 28 59.830922663     16.78     ~ 11 0
103 V* V455 Vir RR* 13 11 50.9082953877 -02 09 49.008334112     13.60     ~ 7 0
104 V* V458 Vir RR* 13 13 16.0055017517 -00 40 10.419656674     17.16     ~ 9 0
105 V* V462 Vir RR* 13 16 09.6425765250 -00 44 16.536344885     17.22     ~ 12 0
106 V* V465 Vir RR* 13 17 41.1133549595 -00 15 24.945104318     17.42     ~ 9 0
107 V* V466 Vir RR* 13 17 57.4620979009 -00 08 18.841061535     17.09     ~ 12 0
108 BPS CS 22874-0009 * 14 34 23.1650238622 -26 17 37.593258136   13.92 13.58     ~ 16 0
109 BPS CS 22874-0042 PM* 14 38 01.9318806667 -24 58 44.506900006   14.34 13.91     ~ 7 0
110 * 5 Ser Ro* 15 19 18.79710 +01 45 55.4685   5.60   4.8   F8IV 321 0
111 HD 140283 Pe* 15 43 03.0967798658 -10 56 00.595803430 7.508 7.711 7.212 6.63 8.21 F9VkA5mA1 852 0
112 V* V2213 Oph BY* 17 05 16.8186294192 +00 42 09.217571716   6.59   5.6   F8.5IV-V 317 0
113 IC 4665 27 * 17 43 55.8394935898 +05 24 48.242965097   10.46 10.21     A3V 67 0
114 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 1738 2
115 * iot Psc PM* 23 39 57.0413764 +05 37 34.647529 4.640 4.620 4.120 3.68 3.37 F7V 578 0
116 NAME Virgo Stellar Stream MGr ~ ~           ~ 101 0

    Equat.    Gal    SGal    Ecl

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2020.07.10-03:06:44

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