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J/AJ/106/1524    Proper motions in M5                               (Rees, 1993)

New proper motions in the globular cluster M5 Rees Jr. R.F. <Astron. J. 106, 1524 (1993)> =1993AJ....106.1524R
ADC_Keywords: Clusters, globular; Photometry; Proper motions Abstract: New proper motions have been derived from reductions of PDS microdensitometer scans of 17 Yerkes refractor plates spanning an epoch range of 88 years for 515 stars down to V∼15.6 in the region of the globular cluster M5. Photographic photometry in B and V has been obtained for these stars from these scans and scans of six Yerkes reflector plates. The present proper motions have significantly improved precision compared to Cudworth [AJ, 84, 1866 (1979)]. Membership probabilities derived from the new proper motions are largely in agreement with those from Cudworth's study, but this paper includes nearly 200 additional stars, many of which are probable members. A color-magnitude diagram of probable members is presented and discussed, as well as comparisons to previous photometry. All but two of the previously known or suspected variables are found to be highly probable members. These proper motions have been used by Cudworth & Hanson [AJ, 105, 168 (1993)] to derive a large space velocity for M5, implying that it is a rich outer halo cluster on an eccentric orbit near perigalacticon. These motions will be used in a forthcoming paper to explore the internal dynamics of M5, including a derivation of the cluster distance by comparison of the proper motion and radial velocity dispersions. Objects: ------------------------------------------ RA (J2000) DE Designation(s) ------------------------------------------ 15 18 33.22 +02 04 51.7 M5 = NGC 5904 ------------------------------------------ File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 73 515 M5 relative positions, proper motions, photometry, and membership probabilities.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 20 A20 --- Ident Star identifications (1) 22- 27 F6.1 arcsec X X offset from cluster center and aligned close to R.A. and Dec. (equator & equinox 1950, epoch 1975) 29- 34 F6.1 arcsec Y Y offset from cluster center 37- 41 I5 10-5arcsec/yr pmX Relative proper motion in X 44- 45 I2 10-5arcsec/yr e_pmX rms uncertainty on pmX 48- 52 I5 10-5arcsec/yr pmY Relative proper motion in Y 55- 56 I2 10-5arcsec/yr e_pmY rms uncertainty on pmY 59- 63 F5.2 mag Vmag V magnitude 65- 69 F5.2 mag B-V B-V color 72- 73 I2 % Mmb Membership probability
Note (1): Identifications from: B = Barnard (1931PYerO...6....1B) Lowercase letter (no number) = Arp (1955AJ.....60....1A) Roman numeral followed by a dash = Arp (1955AJ.....60..317A) and Buonanno (1981MNRAS.196..435B) Uppercase letter (no number) = Arp (1962ApJ...135..311A) Roman numeral with no dash = Arp (1962ApJ...135..311A) Z = Zhukov (1971, Trudy Pulkovo 78, 160) ZNG = UV-bright star from Zinn et al. (1972A&A....18..390Z) V = Variable from Sawyer Hogg (1973PDDO....3....6S) C = Cudworth (1979AJ.....84.1866C) S = Sanduleak (1989ApJS...71..713S) R = This study
References: Arp H.C., 1955a, AJ, 60, 1 Arp H.C., 1955b, AJ, 60, 317 Arp H.C., 1962, ApJ, 135, 311 Barnard E.E. 1931, Publ. Yerkes Obs., Vol. 6 Buonann R. et al. 1981, MNRAS, 196, 435 Cudworth K.M. 1979, AJ, 84, 1866 Sanduleak N. 1989, 1989, ApJS, 71, 713 Sawyer Hogg H. 1973, Publ. David Dunlap Obs., Vol. 3, No. 6 Zhukov L.V. 1971, Trudy Pulkova Obs., Ser. 2, 78, 160 Zinn R.J. et al. 1972, A&A, 18, 390 This study Origin: AAS CD-ROM series, Volume 1, 1993
(End) Patricia Bauer [CDS] 14-Sep-1994
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