J/MNRAS/477/L50 Structure of the Upper Scorpius association (Galli+, 2018)
Three-dimensional structure of the Upper Scorpius association with the Gaia
first data release.
Galli P.A.B., Joncour I., Moraux E.
<Mon. Not. R. Astron. Soc. 477, L50-54 (2018)>
=2018MNRAS.477L..50G 2018MNRAS.477L..50G (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Proper motions ; Stars, distances ;
Parallaxes, trigonometric ; Parallaxes, spectroscopic ;
Radial velocities ; Space velocities
Keywords: methods: statistical - proper motions - stars: distances -
Galaxy: kinematics and dynamics -
open clusters and associations: individual: Upper Scorpius
Abstract:
Using new proper motion data from recently published catalogs, we
revisit the membership of previously identified members of the Upper
Scorpius association. We confirmed 750 of them as cluster members
based on the convergent point method, compute their kinematic
parallaxes and combined them with Gaia parallaxes to investigate the
3D structure and geometry of the association using a robust covariance
method. We find a mean distance of 146±3±6pc and show that the
morphology of the association defined by the brightest (and most
massive) stars yields a prolate ellipsoid with dimensions of
74x38x32pc3, while the faintest cluster members define a more
elongated structure with dimensions of 98x24x18pc3. We suggest that
the different properties of both populations is an imprint of the star
formation history in this region.
Description:
Properties of the 1322 stars in the Upper Scorpius region. We provide
in this table the identifier, position, proper motion, radial velocity
kinematic and trigonometric parallax, spatial velocity and membership
status for each star in the sample.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 167 1322 Properties of the stars in the Upper Scorpius region
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See also:
I/320 : SPM 4.0 Catalog (Girard+, 2011)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/339 : Hot Stuff for One Year (HSOY) (Altmann+, 2017)
I/340 : UCAC5 Catalogue (Zacharias+ 2017)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 23 A23 --- 2MASS 2MASS identifier (JHHMMSSss+DDMMSSs) or
WISE identifier (WISEJHHMMSS.ss+DDMMSS.s)
25- 26 I2 h RAh Right ascension (J2000)
28- 29 I2 min RAm Right ascension (J2000)
31- 35 F5.2 s RAs Right ascension (J2000)
37 A1 --- DE- Declination sign (J2000)
38- 39 I2 deg DEd Declination (J2000)
41- 42 I2 arcmin DEm Declination (J2000)
44- 48 F5.2 arcsec DEs Declination (J2000)
50- 57 F8.3 mas/yr pmRA ? Proper motion in RA (pmRA*cos(DE))
59- 64 F6.3 mas/yr e_pmRA ? Error on proper motion in RA
66- 73 F8.3 mas/yr pmDE ? Proper motion in DE
75- 80 F6.3 mas/yr e_pmDE ? Error on proper motion in DE
82- 86 A5 --- r_pm Reference for proper motion measurement
(HSOY, TGAS, SPM4 or UCAC5)
88- 93 F6.2 km/s RV ? Radial velocity
95- 98 F4.2 km/s e_RV ? Error on radial velocity
100 I1 --- r_RV ? Reference for radial velocity (1)
102-105 F4.2 mas plxKIN ? Kinematic parallax
107-110 F4.2 mas e_plxKIN ? Error on kinematic parallax
112-116 F5.2 mas plxTRIG ? Trigonometric parallax
118-121 F4.2 mas e_plxTRIG ? Error on trigonometric parallax
123-127 F5.1 km/s UVel ? U component of the spatial velocity
129-131 F3.1 km/s e_UVel ? Lower error on the U component
133-135 F3.1 km/s E_UVel ? Upper error on the U component
137-141 F5.1 km/s VVel ? V component of the spatial velocity
143-145 F3.1 km/s e_VVel ? Lower error on the V component
147-149 F3.1 km/s E_VVel ? Upper error on the V component
151-155 F5.1 km/s WVel ? W component of the spatial velocity
157-159 F3.1 km/s e_WVel ? Lower error on the W component
161-163 F3.1 km/s E_WVel ? Upper error on the W component
165 A1 --- CPSM [Y/N] Membership in Upper Scorpius (2)
167 A1 --- CTRL [Y/N] Control sample status (3)
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Note (1): References as follows:
1 = Chen et al., 2011ApJ...738..122C 2011ApJ...738..122C, Cat. J/ApJ/738/122
2 = Kharchenko et al., 2007AN....328..889K 2007AN....328..889K, Cat. J/AN/328/889
3 = Gontcharov, 2006AstL...32..759G 2006AstL...32..759G, Cat. III/252
4 = Dahm et al., 2012ApJ...745...56D 2012ApJ...745...56D, Cat. J/ApJ/745/56
5 = Torres et al., 2006A&A...460..695T 2006A&A...460..695T, Cat. J/A+A/460/695
6 = White et al., 2007AJ....133.2524W 2007AJ....133.2524W, Cat. J/AJ/133/2524
7 = Mann et al., 2016AJ....152...61M 2016AJ....152...61M
8 = Kordopatis et al., 2013AJ....146..134K 2013AJ....146..134K, Cat. III/272
Note (2): Membership in Upper Scorpius as follows:
Y = yes (member)
N = no (non-member)
Note (3): Control sample status as follows:
Y = yes (included in the control sample)
N = no (not included in the control sample)
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Acknowledgements:
Phillip Galli, phillip.galli(at)iag.usp.br
(End) Patricia Vannier [CDS] 06-Mar-2018