J/MNRAS/478/5184 UCAC5 open clusters membership and proper motion (Dias+, 2018)
Update of membership and mean proper motion of open clusters from
UCAC5 catalogue.
Dias W.S., Monteiro H., Assafin M.
<Mon. Not. R. Astron. Soc., 478, 5184-5189 (2018)>
=2018MNRAS.478.5184D 2018MNRAS.478.5184D (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Proper motions ; Optical
Keywords: open clusters and associations: general
Abstract:
We present mean proper motions and membership probabilities of
individual stars for optically visible open clusters, which have been
determined using data from the UCAC5 catalogue. This follows our
previous studies with the UCAC2 and UCAC4 catalogues, but now using
improved proper motions in the GAIA reference frame. In the present
study results were obtained for a sample of 1108 open clusters. For
five clusters, this is the first determination of mean proper motion,
and for the whole sample, we present results with a much larger number
of identified astrometric member stars than on previous studies. It is
the last update of our Open cluster Catalogue based on proper motion
data only. Future updates will count on astrometric, photometric and
spectroscopic GAIA data as input for analyses.
Description:
We used the central coordinates and diameters of the open clusters
published in our New catalogue of Optically Visible Open Clusters and
Candidates (Dias et al., 2002A&A...389..871D 2002A&A...389..871D, cat. B/ocl) to extract
the data from the UCAC5 catalogue (2017AJ....153..166Z 2017AJ....153..166Z, Cat. I/340).
We complemented the input information using new central coordinates of
10 open clusters updated by Sampedro et al. (2017MNRAS.470.3937S 2017MNRAS.470.3937S,
Cat. J/MNRAS/470/3937). As done in the previous work, we opted to use
a region in the sky about 2 arcmin bigger than the area covered by the
cluster to include virtually all possible members of the studied
clusters. In Table1 we give the radius used for each cluster to
extract the UCAC5 data.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 129 1108 Results of our proper motion analysis for
open clusters
stars.dat 199 308825 Individual cluster stars for 1107 clusters
files/* . 1107 Individual cluster files
--------------------------------------------------------------------------------
See also:
B/ocl : Optically visible open clusters and Candidates
(Dias+ 2002-2016)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/340 : UCAC5 Catalogue (Zacharias+ 2017)
J/MNRAS/470/3937 : 1876 open clusters multimembership catalog (Sampedro+, 2017)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- Cluster Cluster name
19- 23 F5.2 arcmin radius Radius sed to extract the data
25- 28 I4 --- Ntot Number of stars in the field
30- 33 I4 --- Ncabs Number of cluster stars
35- 38 F4.2 --- Ncrel Percentage of cluster stars (Ncabs/Ntot)
40- 45 F6.2 mas/yr pmRAC Cluster proper motion along RA, pmRA*cosDE
47- 51 F5.2 mas/yr s_pmRAC Dispersion of PMcx
53- 58 F6.2 mas/yr pmDEC Cluster proper motion along DE
60- 63 F4.2 mas/yr s_pmDEC Dispersion of PMcy
65- 70 F6.2 deg rhoC Cluster orientation angle of the minor axis
of the elliptical cluster and field stars
proper motion distribution
72- 75 I4 --- Nfabs Number of field stars
77- 82 F6.2 mas/yr pmRAF Field proper motion along RA, pmRA*cosDE
84- 88 F5.2 mas/yr s_pmRAF Dispersion of PMfx
90- 95 F6.2 mas/yr pmDEF Field proper motion along DE
97-101 F5.2 mas/yr s_pmDEF Dispersion of PMfy
103-107 F5.2 deg rhoF Field orientation angle of the minor axis of
the elliptical cluster and field stars
proper motion distribution
109-129 A21 --- FileName Name of the table with members in
subdirectory files
--------------------------------------------------------------------------------
Byte-by-byte Description of file: stars.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- Cluster Cluster name
19- 29 F11.7 deg RAdeg Rigth ascension (J2000)
32- 42 F11.7 deg DEdeg Declination (J2000)
53- 62 I10 --- Gaia Internal Gaia identification number
64- 74 F11.7 deg RAGdeg Gaia right ascension (ICRS) at ep=2015.0
76- 86 F11.7 deg DEGdeg Gaia declination (ICRS) at ep=2015.0
89- 92 F4.1 arcsec e_RAGdeg rms uncertainty on RAGdeg
95- 98 F4.1 arcsec e_DEGdeg rms uncertainty on DEGdeg
101 I1 --- Org [1/3]?=- TGAS/NOMAD flag (1)
104-105 I2 --- Nu UCAC5 number of images used for
mean position
108-115 F8.3 yr EP ?=- UCAC5 epoch
117-124 F8.1 mas/yr pmRA ?=- UCAC5 Proper motion along RA, pmRA*cosDE
126-133 F8.1 mas/yr pmDE ?=- UCAC5 Proper motion along DE
136-140 F5.1 mas/yr e_pmRA ?=- rms uncertainty on pmRA
142-146 F5.1 mas/yr e_pmDE ?=- rms uncertainty on pmDE
149-154 F6.3 mag Gmag ?=- Gaia G magnitude
157-162 F6.3 mag f.mag ?=- Means UCAC model magnitude
165-170 F6.3 mag Rmag ?=- R magnitude
173-178 F6.3 mag Jmag ?=- J magnitude
181-186 F6.3 mag Hmag ?=- H magnitude
190-195 F6.3 mag Kmag ?=- K magnitude
197-199 I3 % Pmemb Membership probability
--------------------------------------------------------------------------------
Note (1): Flag as follows:
1 = TGAS
2 = not TGAS, in NOMAD
3 = neither
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 21-Oct-2021