J/A+A/654/A122 X1 Fornacis cluster DANCe (Galli+, 2021)
χ1 Fornacis cluster DANCe.
Census of stars, structure, and kinematics of the cluster with Gaia-EDR3.
Galli P.A.B., Bouy H., Olivares J., Miret-Roig N., Sarro L.M.,
Barrado D., Berihuete A.
<Astron. Astrophys. 654, A122 (2021)>
=2021A&A...654A.122G 2021A&A...654A.122G (SIMBAD/NED BibCode)
ADC_Keywords: Associations, stellar ; Clusters, open ; Stars, distances
Keywords: open clusters and associations: individual: Alessi 13 -
stars: formation - stars: distances - methods: statistical -
parallaxes - proper motions
Abstract:
The χ1 Fornacis cluster (Alessi 13) is one of a few open
clusters of its age and distance in the Solar neighbourhood that ought
to benefit from more attention as it can serve as a cornerstone for
numerous future studies related to star and planet formation. Aims: We
take advantage of the early installment of the third data release of
the Gaia space mission in combination with archival data and our own
observations, to expand the census of cluster members and revisit some
properties of the cluster. Methods: We applied a probabilistic method
to infer membership probabilities over a field of more than 1000deg2
to select the most likely cluster members and derive the distances,
spatial velocities, and physical properties of the stars in this
sample. Results: We identify 164 high-probability cluster members
(including 61 new members) covering the magnitude range from 5.1 to
19.6mag in the G-band. Our sample of cluster members is complete down
to 0.04M☉. We derive the distance of 108.4±0.3pc from Bayesian
inference and confirm that the cluster is comoving with the
Tucana-Horologium, Columba, and Carina young stellar associations. We
investigate the kinematics of the cluster from a subsample of stars
with measured radial velocities and we do not detect any significant
expansion or rotation effects in the cluster. Our results suggest that
the cluster is somewhat younger (about 30Myr) than previously thought.
Based on spectroscopic observations, we argue that the cluster is
mass-segregated and that the distribution of spectral types shows
little variation compared to other young stellar groups. Conclusions:
In this study, we deliver the most complete census of cluster members
that can be done with Gaia data alone and we use this new sample to
provide an updated picture on the 6D structure of the cluster.
Description:
The tables provide the kinematic and astrophysical parameters
(position, proper motion, radial velocity, parallax, distance, spatial
velocity, spectral type, SED classification, and luminosity) of the
cluster members selected in our membership analysis. We also provide
individual membership probabilities for all sources in the field
surveyed in our analysis and the empirical isochrone of the cluster.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 195 164 Properties of the 164 cluster members
tablea4.dat 85 154 Physical properties of the cluster members
with VOSA
tablea2.dat 79 1646589 Membership probabilities for all sources
tablea3.dat 69 400 Empirical isochrone of the cluster
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See also:
J/A+A/577/A148 : The Seven Sisters DANCe. I. Pleiades (Bouy+, 2015)
J/MNRAS/460/2593 : Cygnus OB2 DANCe: Proper motion study (Wright+, 2016)
J/A+A/625/A115 : Ruprecht 147 DANCe. I. (Olivares+, 2019)
J/A+A/631/A57 : IC 4665 DANCe (Miret-Roig+, 2019)
J/A+A/634/A98 : Corona-Australis DANCe. I. (Galli+, 2020)
J/A+A/643/A148 : Lupus DANCe. Census and 6D structure with Gaia-DR2
(Galli+, 2020)
J/A+A/646/A46 : Chamaeleon DANCe. Stellar population with Gaia-DR2
(Galli+, 2021)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- --- [Gaia EDR3]
11- 29 I19 --- GaiaEDR3 Gaia-EDR3 source identifier
31- 43 A13 --- OName Other name (alternative identifier)
45- 46 I2 h RAh Right ascension (ICRS) at Ep=2016.0
48- 49 I2 min RAm Right ascension (ICRS) at Ep=2016.0
51- 55 F5.2 s RAs Right ascension (ICRS) at Ep=2016.0
57 A1 --- DE- Declination signi (ICRS) at Ep=2016.0
58- 59 I2 deg DEd Declination (ICRS) at Ep=2016.0
61- 62 I2 arcmin DEm Declination (ICRS) at Ep=2016.0
64- 67 F4.1 arcsec DEs Declination (ICRS) at Ep=2016.0
69- 74 F6.3 mas/yr pmRA Proper motion along right ascension
76- 80 F5.3 mas/yr e_pmRA Uncertainty of proper motion along
right ascension
82- 88 F7.3 mas/yr pmDE Proper motion along declination
90- 94 F5.3 mas/yr e_pmDE Uncertainty of proper motion along declination
96-101 F6.3 mas plx Parallax
103-107 F5.3 mas e_plx Uncertainty of parallax
109-112 F4.2 --- prob [0/1] Membership probability
(from zero to one)
114-118 F5.2 km/s RV ? Radial velocity
120-123 F4.2 km/s e_RV ? Uncertainty of radial velocity
125 I1 --- r_RV [1/5]? Reference for radial velocity (1)
127-130 A4 --- SpType Spectral type
132 I1 --- r_SpType [1/5]? Reference for spectral type (2)
134-138 F5.1 pc d Distance
140-142 F3.1 pc E_d Upper uncertainty of the distance
144-147 F4.1 pc e_d Lower uncertainty of the distance
149-153 F5.1 km/s Ugal ? U-velocity component
155-157 F3.1 km/s E_Ugal ? Upper uncertainty of U-velocity component
159-162 F4.1 km/s e_Ugal ? Lower uncertainty of U-velocity component
164-168 F5.1 km/s Vgal ? V-velocity component
170-172 F3.1 km/s E_Vgal ? Upper uncertainty of V-velocity component
174-177 F4.1 km/s e_Vgal ? Lower uncertainty of V-velocity component
179-182 F4.1 km/s Wgal ? W-velocity component
184-186 F3.1 km/s E_Wgal ? Upper uncertainty of W-velocity component
188-191 F4.1 km/s e_Wgal ? Lower uncertainty of W-velocity component
193-195 A3 --- SED SED classification
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Note (1): References for radial velocities as follows:
1 = Gaia-EDR3 (2021A&A...649A...1G 2021A&A...649A...1G, Cat. I/350)
2 = Gontcharov (2006AstL...32..759G 2006AstL...32..759G, Cat. III/252)
3 = This paper
4 = Kordopatis et al. 2013 (2013AJ....146..134K 2013AJ....146..134K, Cat. III/272)
5 = Shkolnik et al. 2017 (2017AJ....154...69S 2017AJ....154...69S, Cat. J/AJ/154/69)
Note (2): References for spectral types:
1 = This paper
2 = Houk 1982 (1982mcts.book.....H 1982mcts.book.....H, Cat. III/51)
3 = Jackson & Stoy 1955 (1955AnCap..18....0J 1955AnCap..18....0J, Cat. I/116)
4 = Torres et al. 2006 (2006A&A...460..695T 2006A&A...460..695T, Cat. J/A+A/460/695)
5 = Shkolnik et al. 2017 (2017AJ....154...69S 2017AJ....154...69S, Cat. J/AJ/154/69)
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Byte-by-byte Description of file: tablea4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- --- [Gaia EDR3]
11- 29 I19 --- GaiaEDR3 Gaia-EDR3 source identifier
31- 32 I2 h RAh Right ascension (ICRS) at Ep=2016.0
34- 35 I2 min RAm Right ascension (ICRS) at Ep=2016.0
37- 41 F5.2 s RAs Right ascension (ICRS) at Ep=2016.0
43 A1 --- DE- Declination sign (ICRS) at Ep=2016.0
44- 45 I2 deg DEd Declination (ICRS) at Ep=2016.0
47- 48 I2 arcmin DEm Declination (ICRS) at Ep=2016.0
50- 53 F4.1 arcsec DEs Declination (ICRS) at Ep=2016.0
55- 59 I5 K Teff Effective temperature
61- 63 I3 K e_Teff Uncertainty of effective temperature
65- 70 F6.3 --- L Logarithm of luminosity (in LSun)
72- 76 F5.3 --- E_L Upper uncertainty of luminosity
78- 85 F8.5 --- e_L Lower uncertainty of luminosity
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- --- [Gaia EDR3]
11- 29 I19 --- GaiaEDR3 Gaia-EDR3 source identifier
31- 39 E9.2 --- P050 [0/1]? Probability derived
from p_in=0.5 solution (prob_pin0p5)
41- 49 E9.2 --- P060 [0/1]? Probability derived
from p_in=0.6 solution (prob_pin0p6)
51- 59 E9.2 --- P070 [0/1]? Probability derived
from p_in=0.7 solution (prob_pin0p7)
61- 69 E9.2 --- P080 [0/1]? Probability derived
from p_in=0.8 solution (prob_pin0p8)
71- 79 E9.2 --- P090 [0/1]? Probability derived
from p_in=0.9 solution (prob_pin0p9)
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 19 F19.16 mag RPmag RP magnitude from Gaia-EDR3
21- 42 F22.19 mag G-RP G-RP colour from Gaia-EDR3
44- 64 F21.18 mag GMAG Absolute magnitude in G-band
66- 69 A4 --- SpType Spectral type
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Acknowledgements:
Phillip Galli, phillip.galli(at)u-bordeaux.fr
(End) Phillip Galli [LAB, France], Patricia Vannier [CDS] 02-Sep-2021