J/A+A/480/735 Young local stellar associations (Fernandez+, 2008)
On the kinematic evolution of young local associations and the
Scorpius-Centaurus complex.
Fernandez D., Figueras F., Torra J.
<Astron. Astrophys., 480, 735-751 (2008)>
=2008A&A...480..735F 2008A&A...480..735F
ADC_Keywords: Stars, nearby ; Associations, stellar ; Proper motions ;
Radial velocities
Keywords: Galaxy: kinematics and dynamics - Galaxy: solar neighborhood -
Galaxy: open clusters and associations: general - stars: kinematics -
stars: formation - ISM: individual objects: Local Bubble
Abstract:
Over the last decade, several groups of young (mainly low-mass) stars
have been discovered in the solar neighbourhood (closer than ∼100pc),
thanks to cross-correlation between X-ray, optical spectroscopy and
kinematic data. These young local associations - including an
important fraction whose members are Hipparcos stars - offer insights
into the star formation process in low-density environments, shed
light on the substellar domain, and could have played an important
role in the recent history of the local interstellar medium.
To study the kinematic evolution of young local associations and their
relation to other young stellar groups and structures in the local
interstellar medium, thus casting new light on recent star formation
processes in the solar neighbourhood.
Description:
We compiled the data published in the literature for young local
associations. Using a realistic Galactic potential we integrated the
orbits for these associations and the Sco-Cen complex back in time.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table7.dat 164 39 Known members of the TW Hya association
table8.dat 162 52 Probable and possible members of the
Tuc-Hor/GAYA association
table9.dat 163 33 Known members of the β Pic moving group
table10.dat 162 16 Known members of the ε Cha association
table11.dat 162 18 Known members of the cluster η Cha
table12.dat 162 5 Known members of the HD 141569 system
table13.dat 161 59 Known members of the extended R CrA association
table14.dat 162 37 Known members of the AB Dor moving group
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See also:
J/AJ/133/694 : Abundances in the HR 1614 moving group (De Silva+, 2007)
J/A+A/499/129 : Old MS stars in young moving groups (Lopez-Santiago+, 2009)
J/AJ/140/119 : β Pic & AB Dor moving groups members (Schlieder+, 2010)
J/AJ/140/293 : Spectroscopic study of Wolf 630 moving group (Bubar+, 2010)
J/A+A/379/976 : Moving groups late-type stars EW + fluxes (Montes+ 2001)
J/AZh/88/284 : Chemical abundance of Hercules moving group (Pakhomov+ 2011)
J/MNRAS/416/3108 : Membership of Sco OB2 moving group (Rizzuto+, 2011)
Byte-by-byte Description of file: table*.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Star Star name
19- 45 A27 --- OName Other denominations
47- 48 I2 h RAh ? Right ascension (J2000) (1)
50- 51 I2 min RAm ? Right ascension (J2000) (1)
53- 56 F4.1 s RAs ? Right ascension (J2000) (1)
58 A1 --- DE- Declination sign (J2000) (1)
59- 60 I2 deg DEd ? Declination (J2000) (1)
62- 63 I2 arcmin DEm ? Declination (J2000) (1)
65- 66 I2 arcsec DEs ? Declination (J2000) (1)
68- 76 A9 --- SpType MK Spectral type
79- 83 F5.2 mag Vmag ? V magnitude (or R or K, see n_Vmag)
84 A1 --- n_Vmag [KR] if K or R magnitude in Vmag
85- 89 F5.2 mag B-V ? B-V (or V-I) colour index
90 A1 --- u_B-V [:?] Uncertainty flag on B-V
91 A1 --- n_B-V [I] I if V-I colour index in B-V
92- 98 F7.2 mas/yr pmRA ? Proper motion along RA (pmRA*cosDE)
100-105 F6.2 mas/yr e_pmRA ? rms uncertainty on pmRA
108-114 F7.2 mas/yr pmDE ? Proper motion along DE
116-120 F5.2 mas/yr e_pmDE ? rms uncertainty on pmDE
122-127 F6.2 mas plx ? HIP parallax
129-133 F5.2 mas e_plx ? HIP parallax
134 A1 --- l_EWLi Limit flag on EWLi
135-140 F6.3 0.1nm EWLi ? Lithium (6708Å) equivalent width
141 A1 --- n_EWLi [+yn] Note on EWLi
142-146 F5.3 0.1nm EWLi2 ? Second value for EWLi (+ in n_EWLi)
147-150 F4.2 0.1nm e_EWLi ? rms uncertainty on EWLi
151-157 F7.2 km/s VR ? Mean radial velocity
159-163 F5.2 km/s e_VR ? Mean radial velocity error
164 A1 --- u_VR Uncertaitny flag on VR
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Note (1): Note for sources in tables 7 and 12 without position:
* in table7 (TW Hya association)
TWA-2B offset (+0.3", +0.5") from 11 09 13.8 -30 01 40
TWA-3B offset (-0.8", -1.2") from 11 10 28.0 -37 31 52
TWA-4B offset (+0.0", +0.8") from 11 22 05.3 -24 46 40
TWA-5B offset (-0.1", +2.0") from 11 31 55.3 -34 36 27
TWA-8B offset (-1.3", -13.0") from 11 32 41.3 -26 51 56
TWA-9B offset (-5.7", +0.8") from 11 48 24.2 -37 28 49
TWA-11B offset (-5.0", -4.7") from 12 36 01.0 -39 52 10
TWA-13B offset (-2.8", +4.3") from 11 21 17.5 -34 46 51
TWA-15B offset (-1.0", -5.0") from 12 34 20.7 -48 15 15
TWA-19B offset (-37.8", -1.3") from 11 47 24.5 -49 53 03
* in table12 (HD 141569 system)
HD 141569B offset (-0.5s, -7") from 15 49 57.2 -3 55 09
HD 141569C offset (-0.5s, -7") from 15 49 57.2 -3 55 09
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 20-Sep-2012