J/A+A/652/A102 3794 open clusters parameters (Hao+, 2021)
Evolution of the local spiral structure of the Milky Way revealed by
open clusters.
Hao C.J., Xu Y., Hou L.G., Bian S.B., Li J.J., Wu Z.Y., He Z.H., Li Y.J.,
Liu D.J.
<Astron. Astrophys. 652, A102 (2021)>
=2021A&A...652A.102H 2021A&A...652A.102H (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Clusters, open ; Parallaxes, trigonometric ;
Proper motions ; Radial velocities
Keywords: Galaxy: evolution - Galaxy: structure -
Galaxy: kinematics and dynamics -
open clusters and associations: general
Abstract:
The structure and evolution of the spiral arms of the Milky Way are
basic but long-standing questions in astronomy. Especially the
lifetime of spiral arms, it is still a puzzle and has not been well
constrained from observations. In this work, we aim to inspect these
issues by using a large catalogue of open clusters. We have compiled a
catalogue of 3794 OCs based on Gaia EDR3. A majority of them have
accurately determined parallaxes, proper motions and radial
velocities. The age parameters for these OCs are also collected or
calculated. Then, we analysed their distributions on the Galactic
plane, the kinematic properties, the vertical distributions and the
regressed properties of subsamples of OCs in order to better
understand the nearby spiral structure and its evolution. We find
evidence that the nearby spiral arms are compatible with a long lived
pattern and might have remained approximately stable for the past 80
million years. Especially, the Local Arm where our Sun is currently
located in, is also suggested to be long-lived in nature, and probable
a major arm segment in the Milky Way. The evolutionary characteristics
of nearby spiral arms show that the dynamic spiral mechanism might be
not suitable for our Galaxy. Instead, the density wave theory is more
consistent with the observational properties.
Description:
Parameters for 3794 clusters based on the Gaia EDR3.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 178 3794 Parameters for 3794 clusters based on the
Gaia EDR3
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See also:
B/ocl : Optically visible open clusters and Candidates
(Dias+ 2002-2015)
J/A+A/558/A53 : Milky Way global survey of star clusters. II.
(Kharchenko+, 2013)
J/A+A/568/A51 : Milky Way global survey of star clusters. III.
(Schmeja+, 2014)
J/A+A/581/A39 : MWSC IV. 63 new open clusters (Scholz+, 2015)
J/A+A/564/A79 : Proper motions of open clusters from UCAC4 (Dias+, 2014)
J/A+A/618/A93 : Gaia DR2 open clusters in the Milky Way
(Cantat-Gaudin+, 2018)
J/A+A/624/A126 : New open clusters in Perseus direction
(Cantat-Gaudin+, 2019)
J/A+A/618/A59 : Gaia DR2 confirmed new nearby open clusters
(Castro-Ginard+, 2018)
J/A+A/627/A35 : New open clusters in Galactic anti-centre
(Castro-Ginard+, 2019)
J/A+A/635/A45 : 570 new open clusters in the Galactic disc
(Castro-Ginard+, 2020)
J/ApJS/245/32 : Newly identified star clusters in Gaia DR2 (Liu+, 2019)
J/MNRAS/496/2021 : New Galactic open clusters (Ferreira+, 2020)
J/A+A/619/A155 : Open cluster kinematics with Gaia DR2 (Soubiran+, 2018)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1/3794] Sequential number
6- 22 A17 --- Cluster Cluster name
24- 30 F7.3 deg RAdeg Mean right ascension of members (ICRS)
at Ep=2016.0
32- 38 F7.3 deg e_RAdeg Standard deviation of right ascension
40- 46 F7.3 deg DEdeg Mean declination of members (ICRS)
at Ep=2016.0
48- 52 F5.3 deg e_DEdeg Standard deviation of declination
54- 60 F7.3 deg GLON Mean Galactic longitude of members (ICRS)
at Ep=2016.0
62- 68 F7.3 deg GLAT Mean Galactic latitude of members (ICRS)
at Ep=2016.0
70- 75 F6.3 mas plx Mean parallax of members
77- 81 F5.3 mas e_plx Standard deviation of parallax of members
83 I1 --- u_plx [0/1] Parallax uncertainties smaller than
10%? (1=yes, 0=no)
85- 91 F7.3 mas/yr pmRA* Mean proper motion along RA*cosDE of members
93- 97 F5.3 mas/yr e_pmRA* Standard deviation of pmRA*cosDE of members
99-105 F7.3 mas/yr pmDE Mean proper motion along DE of members
107-111 F5.3 mas/yr e_pmDE Standard deviation of pmDE of members
113-118 F6.3 [yr] logt Logarithm of age
120-124 F5.3 [yr] e_logt ?=0.000 Error of age
126-132 F7.2 km/s RV ?=0.00 Mean radial velocity
134-139 F6.2 km/s s_RV ?=0.00 Standard deviation of RV
141-145 F5.2 km/s e_RV ?=0.00 Uncertainty of RV
147-148 I2 --- o_RV ?=0 Number of members used to compute
mean radial velocity
150-152 I3 --- N Number of cluster members
154-178 A25 --- Ref Reference of this OC (1)
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Note (1): References as follows:
Cantat-Gaudin et al. 2018 = Cantat-Gaudin et al., 2018A&A...618A..93C 2018A&A...618A..93C,
Cat. J/A+A/618/A93
Cantat-Gaudin et al. 2019 = Cantat-Gaudin et al., 2019A&A...624A.126C 2019A&A...624A.126C,
Cat. J/A+A/624/A126
Castro-Ginard et al. 2018 = Castro-Ginard et al., 2018A&A...618A..59C 2018A&A...618A..59C
Cat. J/A+A/618/A59
Castro-Ginard et al. 2019 = Castro-Ginard et al., 2019A&A...627A..35C 2019A&A...627A..35C
Cat. J/A+A/627/A35
Castro-Ginard et al. 2020 = Castro-Ginard et al., 2020A&A...635A..45C 2020A&A...635A..45C
Cat. J/A+A/635/A45
Dias et al. 2002 = Dias et al., 2002A&A...389..871D 2002A&A...389..871D, Cat. B/ocl
Ferreira et al. 2020 = Ferreira et al., 2020MNRAS.496.2021F 2020MNRAS.496.2021F,
Cat. J/MNRAS/496/2021
He et al. 2020 = He et al., arXiv:2010.14870
MWSC = Scholz et al., 2015A&A...581A..39S 2015A&A...581A..39S,
Cat. J/A+A/581/A39
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Acknowledgements:
Ye Xu, xuye(at)pmo.ac.cn
References:
Hao C.J. et al. Sixteen Open Clusters Discovered with Sample-based
Clustering Search of Gaia DR2, 2020PASP..132c4502H 2020PASP..132c4502H
He Z.H. et al. A catalogue of 74 new open clusters found in Gaia
Data-Release 2 ArXiv e-prints, arXiv:2010.14870 (2020).
(End) Patricia Vannier [CDS] 09-Jul-2021