2001A&A...371..115C


Query : 2001A&A...371..115C

2001A&A...371..115C - Astronomy and Astrophysics, volume 371, 115-122 (2001/5-3)

The geometry of stellar motions in the nucleus region of the Ursa Major kinematic group.

CHUPINA N.V., REVA V.G. and VERESHCHAGIN S.V.

Abstract (from CDS):

The structure of the central part of the UMa stellar kinematic group was considered according to the data from Hipparcos, Tycho and ACT catalogues. We have shown that in the space occupied by the nucleus there are several populations of stars. The first includes ten stars which are very compactly located in the proper motion diagram and have a normal proper motion distribution. The second group includes six stars with large kinematic difference and there are six field stars placed here too. The question about their coexistence in a common region of space remains open. The well-known stars Mizar and Alcor appear to belong to the different subsystems and do not belong to a unique stellar system. The published radial velocities, as a rule, are determined with insufficient accuracy compared to the errors of the currently available proper motions. A high precision in the radial velocities measurements is necessary for a thorough study of the kinematics of stars inside UMa star system.

Abstract Copyright:

Journal keyword(s): stars: formation - galaxies: open clusters: individual: Ursa Major - stars: kinematics

CDS comments: ACT = AC2000

Simbad objects: 26

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Number of rows : 26
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * 37 UMa PM* 10 35 09.6941789183 +57 04 57.499306343   5.481 5.148     F1V 175 1
2 HD 94348 PM* 10 54 29.2132326848 +57 52 02.828462766   9.66 8.95     G0 5 0
3 NAME UMa Region reg 11 00 +50.0           ~ 318 0
4 * bet UMa PM* 11 01 50.4765370 +56 22 56.733912 2.35 2.35 2.37 2.31 2.35 A1IVps 415 1
5 HD 100203 ** 11 32 20.7193458841 +61 04 56.996054923       6.81   F8VmF5 125 0
6 HD 100831 ** 11 36 35.69284 +56 08 07.2768           G5 33 0
7 HD 100831A PM* 11 36 35.6929636126 +56 08 07.277432917   8.33 7.66 8.38   ~ 33 0
8 HD 100831B SB* 11 36 35.8898408788 +56 08 01.491636689   8.863 8.08     ~ 32 1
9 * gam UMa Em* 11 53 49.8473166 +53 41 41.135025 2.440 2.450 2.440 2.44 2.47 A0Ve+K2V 384 0
10 HD 105963 BY* 12 11 27.7695856315 +53 25 17.608566276   8.91   7.4   K2 51 0
11 HD 238087 PM* 12 12 05.2240712876 +58 55 35.012209320   11.4 10.021 9.633   K5V 48 0
12 * del UMa PM* 12 15 25.5606327 +57 01 57.415606 3.460 3.410 3.320 3.25 3.25 A2Vn 283 0
13 MCC 645 PM* 12 19 48.0625853479 +52 46 45.000291538       10.684   M0.0Ve 33 0
14 HD 108954 PM* 12 30 50.1357900550 +53 04 35.786317103       5.9   F9V 111 0
15 V* NO UMa RS* 12 31 18.9199808163 +55 07 08.286582630   9.04 8.10     K2Ve 123 0
16 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 396 2
17 V* DO CVn BY* 12 35 51.2878234258 +51 13 17.312165454   9.50 8.54     K0 46 0
18 HD 110463 BY* 12 41 44.5224610977 +55 43 28.823352008   9.250 8.265     K3V 103 0
19 HD 111456 ** 12 48 39.4470003426 +60 19 11.037876361   6.299 5.831     F6V 196 1
20 * eps UMa a2* 12 54 01.7495922 +55 57 35.362645 1.76 1.75 1.77 1.79 1.82 A1III-IVpkB9 461 0
21 * 78 UMa ** 13 00 43.69949 +56 21 58.8102   5.29 4.93     F2V 268 0
22 HD 115043 PM* 13 13 37.0081498408 +56 42 29.762950141   7.423 6.813     G1Va 243 0
23 HD 238224 ** 13 23 23.2723798719 +57 54 21.821728551   10.91 9.560 9.355   K5V 57 0
24 * zet01 UMa SB* 13 23 55.542873 +54 55 31.30258 2.11 2.271 2.220 2.10 2.12 A1.5Vas 302 0
25 * g UMa ** 13 25 13.5378333 +54 59 16.654781 4.260 4.180 4.010 3.85 3.78 A5V+M3-4V 292 0
26 HD 124752 ** 14 12 27.04957 +67 35 10.1661           K0-V+M2V 54 0

    Equat.    Gal    SGal    Ecl

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2021.07.25-14:28:00

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