J/MNRAS/504/356 Updated parameters of 1743 open clusters (Dias+, 2021)
Updated parameters of 1743 open clusters based on Gaia DR2.
Dias W.S., Monteiro H., Moitinho A., Lepine J.R.D., Carraro G., Paunzen E.,
Alessi B., Villela L.
<Mon. Not. R. Astron. Soc., 504, 356-371 (2021)>
=2021MNRAS.504..356D 2021MNRAS.504..356D (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Proper motions ; Parallaxes, trigonometric ;
Radial velocities
Keywords: open clusters and associations: general
Abstract:
In this study, we follow up our recent paper (Monteiro et al.,
2020MNRAS.499.1874M 2020MNRAS.499.1874M) and present a homogeneous sample of fundamental
parameters of open clusters in our Galaxy, entirely based on Gaia DR2
data. We used published membership probability of the stars derived
from Gaia DR2 data and applied our isochrone fitting code, updated as
in Monteiro et al. (2020MNRAS.499.1874M 2020MNRAS.499.1874M), to GBP and GRPGaia DR2
data for member stars. In doing this, we take into account the nominal
errors in the data and derive distance, age, and extinction of each
cluster. This work therefore provides parameters for 1743 open
clusters and, as a by-product, a list of likely not physical or
dubious open clusters is provided as well for future investigations.
Furthermore, it was possible to estimate the mean radial velocity of
831 clusters (198 of which are new and unpublished so far), using
stellar radial velocities from Gaia DR2 catalogue. By comparing the
open cluster distances obtained from isochrone fitting with those
obtained from a maximum likelihood estimate of individual member
parallaxes, we found a systematic offset of (-0.05±0.04) mas.
Description:
In this study, we investigated 2237 open clusters and present a list
of 1743 clusters including the parameters here determined, and their
associated uncertainties. The sample is composed of 475 young clusters
(log(age)<7.5 dex), 1075 intermediate-age open clusters
(log(age) between 7.5dex and 9.0dex), and 193 old clusters
(log(age)>9.0dex). 365 clusters are located within 1 kpc and 1379
farther than 1kpc.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 111 1743 Results of mean astrometric parameters obtained
using the Gaia DR2 stellar proper motion and
parallaxes
table2.dat 96 1743 Fundamental parameters obtained from the
isochrone fits
clusters1/* . 1265 Individual cluster stars data (with [Fe/H]temp)
clusters2/* . 478 Individual cluster stars data (without [Fe/H]temp)
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Cluster Cluster name
19- 26 F8.4 deg RAdeg Cluster center right ascension (ICRS)
at Ep=2015.5
28- 35 F8.4 deg DEdeg Cluster center declination (ICRS)
at Ep=2015.5
37- 42 F6.3 deg r50 Radius in which half of the identified
members are located
44- 47 I4 --- N Number of cluster stars
49- 55 F7.3 mas/yr pmRA Cluster proper motion along RA, pmRA*cosDE
57- 62 F6.3 mas/yr e_pmRA rms uncertainty on pmRA
64- 70 F7.3 mas/yr pmDE Cluster proper motion along DE
72- 77 F6.3 mas/yr e_pmDE rms uncertainty on pmDE
79- 84 F6.3 mas Plx Cluster mean parallax
86- 90 F5.3 mas e_Plx rms uncertainty on plx
92- 99 F8.3 km/s RV ?=- Cluster mean radial velocity
101-107 F7.3 km/s e_RV ?=- rms uncertainty on pm RV
109-111 I3 --- NRV ?=0 Number of RV measurements
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Cluster Cluster name
19- 22 I4 pc Dist Cluster distance
24- 27 I4 pc e_Dist rms uncertainty on Dist
29- 33 F5.3 [yr] logage Age
35- 39 F5.3 [yr] e_logage rms uncertainty on logage
41- 46 F6.3 [-] [Fe/H] Metallicity
48- 52 F5.3 [-] e_[Fe/H] rms uncertainty on [Fe/H]
54- 58 F5.3 mag Av Absorption in V band
60- 64 F5.3 mag e_Av rms uncertainty on Av
66- 96 A31 --- FileName Name of the table with stars data
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Byte-by-byte Description of file: clusters1/*
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Bytes Format Units Label Explanations
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1- 7 F7.4 --- pmRApmDEcor Correlation between proper motion in
right ascension and proper motion in
declination
9- 15 F7.4 --- PlxpmRAcor Correlation between parallax and proper
motion in right ascension
17- 23 F7.4 --- PlxpmDEcor Correlation between parallax and proper
motion in declination
25- 33 F9.3 --- RFG G-band mean flux divided by its error
35- 43 F9.3 --- RFBP ?=- Integrated BP mean flux divided by its
error
45- 53 F9.3 --- RFRP ?=- Integrated RP mean flux divided by its
error
55- 59 F5.3 --- E(BR/RP) ?=- BP/RP excess factor
61- 62 I2 --- Nper Number of visibility periods used in
Astrometric solution
64- 67 F4.1 --- [Fe/H]temp ?=- Fe/H of the template used to compute
radial velocity
69- 83 F15.11 deg RAdeg Barycentric right ascension (ICRS)
at Ep=2015.5
85- 90 F6.4 mas e_RAdeg Standard error of right ascension
92-106 F15.11 deg DEdeg Barycentric declination (ICRS)
at Ep=2015.5
108-113 F6.4 mas e_DEdeg Standard error of declination
115-133 I19 --- Source Gaia DR2 source ID
135-143 F9.5 mas Plx ?=- Absolute stellar parallax
145-150 F6.4 mas e_Plx ?=- Standard error of parallax
152-158 F7.3 mas/yr pmRA Proper motion in right ascension
direction (pmRA*cosDE)
160-164 F5.3 mas/yr e_pmRA Standard error of proper motion in right
ascension direction
166-172 F7.3 mas/yr pmDE Proper motion in declination direction
174-178 F5.3 mas/yr e_pmDE Standard error of proper motion in
declination direction
180 I1 --- Dup [0/1] Source with duplicate sources
182-193 F12.2 e-/s FG G-band mean flux
195-207 F13.5 e-/s e_FG Error on G-band mean flux
209-215 F7.4 mag Gmag G-band mean magnitude (Vega)
217-222 F6.4 mag e_Gmag Standard error of G mean magnitude
224-236 F13.3 e-/s FBP ?=- Mean flux in the integrated BP band
238-252 F15.6 e-/s e_FBP ?=- Error on the integrated BP mean flux
254-260 F7.4 mag BPmag ?=- Integrated BP mean magnitude (Vega)
262-267 F6.4 mag e_BPmag ?=- Standard error of BP mean magnitude
269-281 F13.2 e-/s FRP ?=- Mean flux in the integrated RP band
283-296 F14.6 e-/s e_FRP ?=- Error on the integrated RP mean flux
298-304 F7.4 mag RPmag ?=- Integrated RP mean magnitude (Vega)
306-311 F6.4 mag e_RPmag ?=- Standard error of RP mean magnitude
313-319 F7.4 mag BP-RP ?=- BP-RP colour
321-327 F7.2 km/s RV ?=- Spectroscopic radial velocity in the
solar barycentric reference frame
329-333 F5.2 km/s e_RV ?=- Radial velocity error
335-341 F7.2 K Teff ?=- Stellar effective temperature
343-348 F6.4 mag AG ?=- Estimate of extinction in the G band
from Apsis-Priam
350-355 F6.4 mag E(BR-RP) ?=- Estimate of redenning E(BP-RP) from
Apsis-Priam
357-362 F6.2 solRad Rad ?=- Estimate of radius from Apsis-FLAME
364-372 F9.3 solLum Lum ?=- Esimate of luminosity from Apsis-FLAME
374-380 F7.3 --- Pmemb [0/1] Menbership probability
382-401 A20 --- Cluster Cluster name
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Byte-by-byte Description of file: clusters2/*
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Bytes Format Units Label Explanations
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1- 7 F7.4 --- pmRApmDEcor Correlation between proper motion in
right ascension and proper motion in
declination
9- 15 F7.4 --- PlxpmRAcor Correlation between parallax and proper
motion in right ascension
17- 23 F7.4 --- PlxpmDEcor Correlation between parallax and proper
motion in declination
25- 39 F15.9 --- RFG G-band mean flux divided by its error
41- 56 F16.9 --- RFBP ? Integrated BP mean flux divided by its
error
58- 72 F15.9 --- RFRP ? Integrated RP mean flux divided by its
error
74- 78 F5.3 --- E(BR/RP) ? BP/RP excess factor
80- 81 I2 --- Nper Number of visibility periods used in
Astrometric solution
83- 97 F15.11 deg RAdeg Barycentric right ascension (ICRS)
at Ep=2015.5
99-104 F6.4 mas e_RAdeg Standard error of right ascension
106-120 F15.11 deg DEdeg Barycentric declination (ICRS)
at Ep=2015.5
122-127 F6.4 mas e_DEdeg Standard error of declination
129-147 I19 --- Source Gaia DR2 source ID
149-157 F9.5 mas Plx ? Absolute stellar parallax
159-164 F6.4 mas e_Plx ? Standard error of parallax
166-172 F7.3 mas/yr pmRA Proper motion in right ascension
direction (pmRA*cosDE)
174-178 F5.3 mas/yr e_pmRA Standard error of proper motion in right
ascension direction
180-186 F7.3 mas/yr pmDE Proper motion in declination direction
188-192 F5.3 mas/yr e_pmDE Standard error of proper motion in
declination direction
194 I1 --- Dup [0/1] Source with duplicate sources
196-210 F15.5 e-/s FG G-band mean flux
212-224 F13.5 e-/s e_FG Error on G-band mean flux
226-234 F9.6 mag Gmag G-band mean magnitude (Vega)
236-243 F8.6 mag e_Gmag Standard error of G mean magnitude
245-259 F15.5 e-/s FBP ? Mean flux in the integrated BP band
261-274 F14.6 e-/s e_FBP ? Error on the integrated BP mean flux
276-284 F9.6 mag BPmag ? Integrated BP mean magnitude (Vega)
286-293 F8.6 mag e_BPmag ? Standard error of BP mean magnitude
295-309 F15.5 e-/s FRP ? Mean flux in the integrated RP band
311-323 F13.5 e-/s e_FRP ? Error on the integrated RP mean flux
325-333 F9.6 mag RPmag ? Integrated RP mean magnitude (Vega)
335-342 F8.6 mag e_RPmag ? Standard error of RP mean magnitude
344-350 F7.4 mag BP-RP ? BP-RP colour
352-358 F7.2 km/s RV ? Spectroscopic radial velocity in the
solar barycentric reference frame
360-364 F5.2 km/s e_RV ? Radial velocity error
366-372 F7.2 K Teff ? Stellar effective temperature
374-379 F6.4 mag AG ? Estimate of extinction in the G band
from Apsis-Priam
381-386 F6.4 mag E(BR-RP) ? Estimate of redenning E(BP-RP) from
Apsis-Priam
388-393 F6.2 solRad Rad ? Estimate of radius from Apsis-FLAME
395-403 F9.3 solLum Lum ? Esimate of luminosity from Apsis-FLAME
405-408 F4.2 --- Pmemb [0/1] Menbership probability
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Acknowledgements:
Wilton Dias, wiltonsdias(at)yahoo.com.br
(End) Patricia Vannier [CDS] 20-May-2021