2000ApJ...533..938G

Query : 2000ApJ...533..938G

2000ApJ...533..938G - Astrophys. J., 533, 938-943 (2000/April-3)

The Pleiades, map-based trigonometric parallaxes of open clusters. V.

GATEWOOD G., DE JONGE J.K. and HAN I.

Abstract (from CDS):

The Multichannel Astrometric Photometer and Thaw Refractor (Thaw/MAP) of the University of Pittsburgh's Allegheny Observatory have been used to determine the trigonometric parallax of the Pleiades star cluster. The parallax determined, 0".00764 with a standard error of ±0".00043 (corresponding to a distance modulus of 5.59±0.12 mag) places the cluster significantly further away than indicated by the mean parallax of cluster members drawn from the Hipparcos catalog. The distance derived here is in general agreement with values based on main-sequence fitting, indicating that cluster members are not subluminous as suggested by the Hipparcos-based results. The current study combines the data from our initial study of this cluster with new observations of that region and of a second Pleiades region in an overlapping configuration. It thus supersedes our first determination of the parallax of the Pleiades cluster. A third Pleiades field is being selected for future measurement of the cluster's trigonometric parallax, and assistance with the luminosity classification of reference stars is sought.Subject headings:

Abstract Copyright: ∼

Journal keyword(s): Astrometry - Stars: Hertzsprung-Russell Diagram - Galaxy: Open Clusters and Associations: Individual: Name: Pleiades - Stars: Distances - Stars: Evolution

Nomenclature: Table 1: GAT NNNN (Nos 1297-1300).

CDS comments: T. 3 : misprints : GAT 826 = BD +23 515, GAT 827 = BD +24 556

Simbad objects: 22

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Number of rows : 22
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 BD+23 515 * 03 45 49.6027346640 +24 25 35.760314352   11.22 10.88     G5 9 0
2 HD 23431 * 03 45 59.4349238088 +25 03 05.908146228   10.08 9.68     A2 9 0
3 * 22 Tau ** 03 46 02.9003257344 +24 31 40.428415632   6.402 6.421   6.41 A0Vn 183 0
4 HD 23440 * 03 46 05.7701236128 +24 59 34.642431708   10.66 10.04     G 5 0
5 HD 23463 * 03 46 13.7462402496 +24 11 47.793000552   8.750 7.569 7.32   K2 44 0
6 HD 23500 * 03 46 32.1808510920 +24 52 14.011967208   10.31 9.87     G 11 0
7 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
8 HD 282954 Em* 03 46 38.7739870144 +24 57 34.724064803   10.9 10.27   9.55 F9.5V 120 0
9 HD 23511 PM* 03 46 39.3335012425 +24 06 11.531508492   9.75 9.28   8.75 F5V 144 0
10 HD 23568 ** 03 46 59.3943532032 +24 31 12.448365564   6.83 6.82   6.76 B9.5V 165 0
11 V* V534 Tau dS* 03 47 03.5551874064 +24 49 11.812255356   8.65 8.30   7.83 A9V 120 0
12 BD+24 564 * 03 47 03.5796014184 +24 38 13.646759172   11.51 10.45 9.98   G9 11 0
13 HD 23627A * 03 47 26.5385879707 +24 39 30.453368311   8.99 8.75 9.15   B8 19 0
14 2MASS J03472885+2433251 AB? 03 47 28.8378135000 +24 33 24.949276056   12.09 10.45     M2.0III 13 0
15 V* V1229 Tau SB* 03 47 29.4536404848 +24 17 18.019635504   6.87 6.81   6.74 A0VpSi+Am 225 0
16 HD 282967 Y*O 03 47 40.4453488845 +24 21 52.409176663   11.12 10.48   9.79 G5 113 0
17 HD 282970 ** 03 47 59.311 +24 05 57.04   10.67 10.11 10.33   G0 13 0
18 HD 23712 V* 03 48 06.5398917624 +24 59 18.297533472   8.21 6.49     K5 41 0
19 HD 23733 SB* 03 48 13.5574497288 +24 19 06.222596880   8.73 8.41   7.83 A9V 104 0
20 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
21 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
22 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2

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