J/ApJS/262/7 886 nearby star clusters (He+, 2022)
A blind all-sky search for star clusters in Gaia EDR3:
886 clusters within 1.2 kpc of the Sun.
He Z., Wang K., Luo Y., Li J., Liu X., Jiang Q.
<Astrophys. J. Suppl. Ser. 262, 7 (2022)>
=2022ApJS..262....7H 2022ApJS..262....7H (SIMBAD/NED BibCode)
ADC_Keywords: Surveys; Clusters, open; Parallaxes, trigonometric; Proper motions
Keywords: Galaxy: disc - open clusters and associations: general - astrometry -
methods: data analysis
Abstract:
Although previous searches for star clusters have been very
successful, many clusters are likely still omitted, especially at high
Galactic latitude regions.
In this work, based on the astrometry of Gaia EDR3, we searched nearby
(Parallax>0.8mas) all-sky regions, obtaining 886 star clusters, of
which 270 candidates have not been cataloged before. At the same time,
we have presented the physical parameters of the clusters by fitting
theoretical isochrones to their optical magnitudes. More halo members
and expanding structures in many star clusters were also found. Most
of the new objects are young clusters that are less than 100 million
years old. Our work greatly increased the sample size and physical
parameters of star clusters in the solar neighborhood, in particular,
46 clusters are newly found with |b|>20deg, which represents an
increase of nearly three fold of cluster numbers at high Galactic
latitude regions.
Description:
clusters.dat contains astrophysical parameters for the 886 star
clusters and candidates identified in this work.
members.dat contains astrometric and photometric parameters of 134192
member stars from Gaia EDR3.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
clusters.dat 105 886 Parameters for the 886 objects
members.dat 119 134192 Gaia EDR3 parameters of the member stars
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See also:
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/other/RAA/21.93 : 74 new open clusters found in Gaia DR2 (He+, 2021)
J/ApJS/260/8 : 541 new open cluster candidates (He+, 2022)
Byte-by-byte Description of file: clusters.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Cluster Cluster identifier
19- 26 F8.4 deg GLON Galactic longitude
28- 33 F6.3 deg e_GLON 1-sigma dispersion in GLON
35- 42 F8.4 deg GLAT Galactic latitude
44- 48 F5.3 deg e_GLAT 1-sigma dispersion in GLAT
50- 53 I4 --- Num Number of member stars
55- 60 F6.3 mas plx Gaia EDR3 median parallax
62- 66 F5.3 mas e_plx 1-sigma dispersion in plx
68- 74 F7.3 mas/yr pmRA Gaia EDR3 median proper motion along RA
76- 80 F5.3 mas/yr e_pmRA 1-sigma dispersion in pmRA
82- 88 F7.3 mas/yr pmDE Gaia EDR3 median proper motion along DE
90- 95 F6.3 mas/yr e_pmDE 1-sigma dispersion in pmDE
97-100 F4.2 [yr] logAge log age (1)
102-105 F4.2 mag A0 Extinction at 550nm (1)
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Note (1): The typical fitted accuracy for logAge and A0 are 0.05dex and 0.05mag,
respectively.
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Byte-by-byte Description of file: members.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- GaiaEDR3 Gaia EDR3 identifier
21- 28 F8.4 deg GLON Galactic longitude
30- 37 F8.4 deg GLAT Galactic latitude
39- 44 F6.3 mas plx Gaia EDR3 parallax
46- 50 F5.3 mas e_plx Uncertainty in plx
52- 58 F7.3 mas/yr pmRA Gaia EDR3 proper motion along pmRA
60- 64 F5.3 mas/yr e_pmRA Uncertainty in pmRA
66- 72 F7.3 mas/yr pmDE Gaia EDR3 proper motion along pmDE
74- 78 F5.3 mas/yr e_pmDE Uncertainty in pmDE
80- 84 F5.2 --- RUWE Renormalised unit weight error for astrometry
86- 91 F6.3 mag Gmag Mean Gaia EDR3 G band magnitude
93- 98 F6.3 mag BP-RP ? Mean Gaia EDR3 Bp - Rp color
100-101 I2 --- nre [1/11] Response time; see Section 3.1 (1)
103-119 A17 --- Cluster Cluster identifier
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Note (1): The nre value (from 1 to 11) is the number of responses derived from
DBSCAN.
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Acknowledgements:
Zhihong He, hezh(at)mail.ustc.edu.cn
References:
Castro-Ginard et al., 2018A&A...618A..59C 2018A&A...618A..59C
(End) Patricia Vannier [CDS] 24-Jun-2022