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


Query : 2014A&A...566A.118D

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 - 2022
#notes
1 * 6 Cet PM* 00 11 15.8580395472 -15 28 04.720468404 5.35 5.38 4.89     F8VFe-0.8CH-0.5 298 0
2 HD 3268 PM* 00 35 54.8017196664 +13 12 25.451468496   6.93   6.0   F7V 94 0
3 * 38 Cet PM* 01 14 49.1725004760 -00 58 25.659970248   6.12 5.69     F3V 112 0
4 * eta Ari PM* 02 12 48.0856782200 +21 12 39.577562642       5.0   F5V 180 0
5 BPS CS 22175-0034 * 02 20 21.5103539784 -10 38 08.937751524   12.97 12.60     ~ 9 0
6 NAME Sagittarius Stream St* 02 22 +00.0           ~ 770 0
7 * tet Per PM* 02 44 11.9866154103 +49 13 42.414669174 4.62 4.62 4.11 3.67 3.37 F8V 396 0
8 * 94 Cet PM* 03 12 46.4365677072 -01 11 45.955808988   5.631 5.070     F8.5V 428 1
9 LP 772-81 PM* 03 14 53.7607697784 -14 43 53.824533708   14.13 13.79     ~ 9 0
10 HD 22413 PM* 03 35 24.7229958528 -28 20 11.773475196   9.08 8.81     A9V 42 0
11 * 10 Tau PM* 03 36 52.3837044168 +00 24 05.992097829 5.23 5.15 4.30 4.09 3.77 F9IV-V 543 0
12 HD 22879 Pe* 03 40 22.0652879951 -03 13 01.124265616 7.146 7.222 6.667 6.346 6.016 G0VmF2 467 0
13 HD 49933 PM* 06 50 49.8309774552 -00 32 27.167495244   6.147 5.771 7.04   F3V 361 2
14 HD 65925 ** 07 59 28.3656952 -39 17 49.007727   5.605 5.224     F3V 57 0
15 HD 74000 PM* 08 40 50.8036114756 -16 20 42.516208237 9.84 10.09 9.66     F2 255 0
16 HD 74438 * 08 41 46.5805673472 -53 03 44.995790376   7.81 7.58     A2mA5-A8 47 0
17 * del Pyx PM* 08 55 31.5672169176 -27 40 54.653564604   5.00 4.89     A3IV 50 0
18 * G Car SB* 09 05 08.8130929 -72 36 09.743658   5.069 4.467     F8II+DA 70 0
19 * bet Vir PM* 11 50 41.7185158616 +01 45 53.001539131 4.26 4.15 3.60 3.13 2.85 F9V 895 0
20 ATO J178.3184-03.4288 RR* 11 53 16.4243990904 -03 25 43.754710800     16.67     ~ 8 0
21 [SHM2017] J178.64802-04.23068 RR* 11 54 35.5148389536 -04 13 50.424283128     15.75     ~ 6 0
22 LINEAR 2568913 RR* 11 55 10.5425402088 -02 26 39.996786084     16.82     ~ 10 0
23 V* V357 Vir RR* 11 55 34.3951609704 -00 36 01.856277900     16.76     ~ 16 0
24 LINEAR 2574370 RR* 11 55 36.1812374760 -02 54 07.992498348     15.55     ~ 9 0
25 LINEAR 2669011 RR* 11 56 42.1060672344 -03 28 10.935631920     15.45     ~ 10 0
26 LINEAR 2667036 RR* 11 58 35.7311842416 -03 11 01.614174108     16.85     ~ 9 0
27 [SHM2017] J179.72859-04.23682 RR* 11 58 54.8549937024 -04 14 12.620279076     16.74     ~ 7 0
28 V* V364 Vir RR* 12 00 44.3904600648 -00 42 45.104946012     16.66     ~ 11 0
29 LINEAR 2763072 RR* 12 00 47.9365814448 +00 46 11.005218552     17.25     ~ 10 0
30 V* V366 Vir RR* 12 01 35.3627643624 -00 14 05.260323336     15.97     ~ 10 0
31 GUVV J120136.9-033328.1 RR* 12 01 36.9569022816 -03 33 28.562592132   17.66 17.26 17.41 17.28 ~ 9 0
32 V* V367 Vir RR* 12 02 31.7754058488 -01 53 44.660225076     16.25     ~ 14 0
33 [ZHV2014] 427 RR* 12 03 27.4327143072 -03 15 45.073457856     16.66     ~ 8 0
34 V* V368 Vir RR* 12 04 20.9306462928 -02 10 42.190707432     16.40     ~ 12 0
35 V* V369 Vir RR* 12 04 50.9965261200 -00 21 06.583404996     17.01     ~ 10 0
36 CRTS J120516.2-040549 RR* 12 05 16.2191630496 -04 05 49.658040456     16.63     ~ 5 0
37 V* V370 Vir RR* 12 06 04.1331590832 -02 12 57.381365664     15.14     ~ 16 0
38 LINEAR 2977765 RR* 12 06 31.4824309656 -03 16 23.107825164   16.1 15.93     ~ 9 0
39 HD 105183 HS* 12 06 47.2348389600 +11 40 12.659833056   10.93 11.06     sdB8IIIHe2 111 0
40 V* V372 Vir RR* 12 07 38.6931645552 -00 45 10.176012540     15.92     ~ 10 0
41 V* V373 Vir RR* 12 08 00.3806840904 -01 12 34.057630404     15.79     ~ 14 0
42 V* V374 Vir RR* 12 08 31.3707589608 -00 47 17.722789332     16.93     ~ 12 0
43 V* V376 Vir RR* 12 09 15.7188791688 -01 54 44.305872156     15.56     ~ 14 0
44 [ZHV2014] 467 RR* 12 10 21.0001636056 -02 44 34.139265900     16.90     ~ 7 0
45 V* V378 Vir RR* 12 11 32.0286213144 -01 52 36.143296572     14.88     ~ 12 0
46 V* V380 Vir RR* 12 12 15.4638737952 -01 21 13.200043968     15.25     ~ 12 0
47 LINEAR 3196279 RR* 12 13 29.6394788928 -01 01 51.861020916     17.46     ~ 13 0
48 LINEAR 3288763 RR* 12 15 24.1976728512 -03 38 43.024662780     17.12 17.10   ~ 9 0
49 V* V381 Vir RR* 12 15 27.7927482048 -00 52 56.552033028     16.01     ~ 15 0
50 V* V382 Vir RR* 12 15 51.6527100696 -00 05 54.860824860     16.75     ~ 14 0
51 [SHM2017] J184.39527-04.09841 RR* 12 17 34.8703270824 -04 05 54.427357392     16.17     ~ 6 0
52 V* V385 Vir RR* 12 18 43.0420957080 -00 42 38.646059040     17.13     ~ 11 0
53 NAME Vir Z G 12 20 19.2 -01 21 00           ~ 3 0
54 LINEAR 3592837 RR* 12 23 03.5307446208 -03 35 16.347693408     15.25     ~ 11 0
55 V* V389 Vir RR* 12 23 10.8775664904 -00 16 57.840771252     16.65     ~ 12 0
56 V* V390 Vir RR* 12 24 15.6610331760 -01 49 14.359814616     17.02 16.83   ~ 15 0
57 V* V392 Vir RR* 12 24 19.9099106136 -00 13 38.730488052     17.03     ~ 13 0
58 LINEAR 3805831 RR* 12 26 20.6556577872 -02 26 46.303165032     17.22     ~ 10 0
59 V* V396 Vir RR* 12 27 43.2985821912 -00 57 55.070357472     17.14     ~ 12 0
60 V* V397 Vir RR* 12 27 48.1733898624 -00 58 46.280902296     16.61     ~ 13 0
61 V* V398 Vir RR* 12 28 03.8615370960 -01 14 54.655375848     15.23     ~ 10 0
62 V* V400 Vir RR* 12 29 10.5365142888 -01 33 59.700884076     15.07     ~ 13 0
63 NAME Virgo Region reg 12 30.8 +12 23           ~ 124 1
64 V* V402 Vir RR* 12 31 33.3372993552 -00 20 10.280053932     16.87 16.71   ~ 14 0
65 V* V404 Vir RR* 12 31 47.1836824056 -00 53 04.041914136     16.45     ~ 11 0
66 LINEAR 4141002 RR* 12 33 12.4248369312 -02 55 26.940767628     16.77     ~ 13 0
67 [MRS2008] 188.455414-02.749273 RR* 12 33 49.3100383728 -02 44 56.805516708     16.75     ~ 13 0
68 V* V405 Vir RR* 12 34 53.4783248760 -00 18 00.352088856     16.31     ~ 13 0
69 LINEAR 4234952 RR* 12 36 33.4537683696 -03 25 48.378317520     16.72     ~ 8 0
70 LINEAR 4139829 RR* 12 37 32.5830290304 -02 44 03.981279552     16.65     ~ 10 0
71 LINEAR 4229566 RR* 12 37 56.9116676784 -03 38 08.499804720     15.94     ~ 8 0
72 V* V407 Vir RR* 12 39 49.4539546824 -00 00 06.454944972     16.93     ~ 14 0
73 V* V408 Vir RR* 12 40 03.5423919312 -00 04 09.568737012     16.93     ~ 15 0
74 [NYR2002] S297+63-20.5 reg 12 41 +00.0           ~ 16 0
75 LINEAR 4314873 RR* 12 41 36.6582917208 +01 13 06.366167076     17.20     ~ 9 0
76 V* BS Vir RR* 12 41 39.8067048696 -01 49 49.111344408     13.95     ~ 18 0
77 V* V410 Vir RR* 12 42 11.1664530576 -01 33 39.831589188     16.39     ~ 11 0
78 V* V411 Vir RR* 12 42 24.9108844464 -00 12 03.101517216     14.53     ~ 19 0
79 LINEAR 7601233 RR* 12 43 36.3493353000 -03 20 46.658882472     15.92     ~ 11 0
80 V* BT Vir RR* 12 43 51.2256169776 -01 23 14.393173020     14.95     ~ 18 0
81 V* V413 Vir RR* 12 44 07.1218116480 -00 56 49.107503796     16.26     ~ 11 0
82 CRTS J124420.0-032138 RR* 12 44 20.1487654032 -03 21 37.958421780     16.92     ~ 8 0
83 LINEAR 4539471 RR* 12 44 21.2046557688 -02 35 07.472516532     15.96     ~ 10 0
84 V* BU Vir RR* 12 44 29.7013088664 -02 04 50.171786544     14.53     ~ 17 0
85 V* V414 Vir RR* 12 44 50.1330534120 -00 50 39.690592044     14.80     ~ 13 0
86 V* V417 Vir RR* 12 46 14.8478055624 -01 03 11.997657396     16.54     ~ 13 0
87 V* V418 Vir RR* 12 46 48.0746095728 -02 07 18.961182264     15.44     ~ 14 0
88 V* V421 Vir RR* 12 49 14.5468859832 -00 49 25.500255492     16.83     ~ 11 0
89 V* V422 Vir RR* 12 51 02.3194656720 -00 45 12.741912180     17.04     ~ 12 0
90 V* V423 Vir RR* 12 52 05.3700665448 -02 00 07.168492116     16.64     ~ 14 0
91 V* V424 Vir RR* 12 52 08.7324679752 -00 29 31.728268968     15.47     ~ 18 0
92 V* V426 Vir RR* 12 52 44.5961959320 -00 25 12.884618172     15.45     ~ 17 0
93 CRTS J125331.2-035626 RR* 12 53 31.2882199296 -03 56 26.884935888     14.52     ~ 4 0
94 V* V427 Vir RR* 12 53 32.5324824072 -02 08 29.655635640     14.12     ~ 13 0
95 V* V428 Vir RR* 12 55 02.0307426912 -02 02 54.627387216     16.61     ~ 12 0
96 V* V429 Vir RR* 12 55 06.0418023216 -00 05 42.458638632     15.99     ~ 14 0
97 V* V431 Vir RR* 12 56 00.9253869984 -00 14 49.886278980     16.79     ~ 8 0
98 V* V433 Vir RR* 12 56 43.9189267656 -01 01 50.308464756     16.09     ~ 13 0
99 V* V435 Vir RR* 12 57 57.7361828664 -00 58 56.566975728     17.01     ~ 10 0
100 V* V436 Vir RR* 12 58 03.1032321552 -02 00 33.906904380     16.80     ~ 12 0
101 V* V443 Vir RR* 13 03 13.6263013416 -01 22 22.088449632     14.67     ~ 7 0
102 V* V453 Vir RR* 13 11 15.6461812416 -00 28 59.831209020     16.78     ~ 13 0
103 V* V455 Vir RR* 13 11 50.9081917344 -02 09 49.007883456     13.60     ~ 9 0
104 V* V458 Vir RR* 13 13 16.0053913584 -00 40 10.419623904     17.16     ~ 10 0
105 V* V462 Vir RR* 13 16 09.6427192032 -00 44 16.535491908     17.22     ~ 14 0
106 V* V465 Vir RR* 13 17 41.1135674088 -00 15 24.943569588     17.42     ~ 11 0
107 V* V466 Vir RR* 13 17 57.4622063136 -00 08 18.842684892     17.09     ~ 14 0
108 BPS CS 22874-0009 * 14 34 23.1652039128 -26 17 37.594213908   13.92 13.58     ~ 16 0
109 BPS CS 22874-0042 PM* 14 38 01.9319095944 -24 58 44.508550764   14.34 13.91     ~ 7 0
110 * 5 Ser Ro* 15 19 18.7974409923 +01 45 55.466382064   5.60   4.8   F8IV 331 0
111 HD 140283 Pe* 15 43 03.0971190219 -10 56 00.595693188 7.508 7.711 7.212 6.63 8.21 F9VkA5mA1 893 0
112 V* V2213 Oph BY* 17 05 16.8186610814 +00 42 09.221511649   6.59   5.6   F8.5IV-V 329 0
113 IC 4665 27 * 17 43 55.8394428292 +05 24 48.245014179   10.46 10.21     A3V 73 0
114 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 1971 2
115 * iot Psc PM* 23 39 57.0413764 +05 37 34.647529 4.640 4.620 4.120 3.68 3.37 F7V 599 0
116 NAME Virgo Stellar Stream MGr ~ ~           ~ 105 0

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2022.08.12-08:50:23

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