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 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:
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RA (J2000) DE Designation(s)
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15 18 33.22 +02 04 51.7 M5 = NGC 5904
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 73 515 M5 relative positions, proper motions, photometry,
and membership probabilities.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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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
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Note (1): Identifications from:
B = Barnard (1931PYerO...6....1B 1931PYerO...6....1B)
Lowercase letter (no number) = Arp (1955AJ.....60....1A 1955AJ.....60....1A)
Roman numeral followed by a dash = Arp (1955AJ.....60..317A 1955AJ.....60..317A) and
Buonanno (1981MNRAS.196..435B 1981MNRAS.196..435B)
Uppercase letter (no number) = Arp (1962ApJ...135..311A 1962ApJ...135..311A)
Roman numeral with no dash = Arp (1962ApJ...135..311A 1962ApJ...135..311A)
Z = Zhukov (1971, Trudy Pulkovo 78, 160)
ZNG = UV-bright star from Zinn et al.
(1972A&A....18..390Z 1972A&A....18..390Z)
V = Variable from Sawyer Hogg
(1973PDDO....3....6S 1973PDDO....3....6S)
C = Cudworth (1979AJ.....84.1866C 1979AJ.....84.1866C)
S = Sanduleak (1989ApJS...71..713S 1989ApJS...71..713S)
R = This study
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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
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Origin: AAS CD-ROM series, Volume 1, 1993
(End) Patricia Bauer [CDS] 14-Sep-1994