J/AJ/159/105 Two new stellar associations in vicinity of the Sun (Liu+, 2020)
Discovery of two nearby post-T Tauri stellar associations.
Liu J., Fang M., Liu C.
<Astron. J., 159, 105 (2020)>
=2020AJ....159..105L 2020AJ....159..105L
ADC_Keywords: Associations, stellar; Stars, pre-main sequence; Stars, distances;
Spectral types; Radial velocities; Proper motions; Optical
Keywords: Pre-main sequence ; Pre-main sequence stars ; Young star clusters
Abstract:
In this work we report the discovery of two new stellar associations
in close vicinity of the Sun at roughly 180 and 150pc. These two
associations, u-Tau assoc and e-Tau assoc, were detected based on
their clustering in a multi-dimensional parameter space including
α, δ, µα, µδ, and {bar}omega of
Gaia. The fitting of pre-main-sequence model isochrones in their
color-magnitude diagrams suggests that the two associations are of
about 50Myr old and the group members lower than ∼0.8M☉ are at
the stage of post-T Tauri.
Description:
The spectra data adapted in this work are taken from Large Sky Area
Multi-Object Fibre Spectroscopic Telescope (LAMOST). LAMOST is a 4m
Schmidt telescope of the National Astronomical Observatories, located
at Xinglong Observing Station, China.
The data engaged in this work are taken from the recently released
data DR5.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 93 35 Members of u-Tau association
table2.dat 93 119 Members of e-Tau association
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See also:
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
V/164 : LAMOST DR5 catalogs (Luo+, 2019)
J/A+A/446/485 : New very low-mass members in Taurus (Guieu+, 2006)
J/ApJS/173/104 : Stellar population in Chamaeleon I (Luhman, 2007)
J/MNRAS/410/190 : Young runaway stars within 3kpc (Tetzlaff+, 2011)
J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012)
J/ApJ/784/126 : IR photometry of all known members in Taurus (Esplin+, 2014)
J/MNRAS/447/1267 : Low-mass members of the Octans association (Murphy+, 2015)
J/ApJ/831/116 : Photmetry & spectroscopy PMS stars in NGC 2264 (Lim+, 2016)
J/AJ/154/134 : Planetary-mass brown dwarfs in the Taurus SFR (Esplin+,2017)
J/AJ/154/46 : PM and photometry for members of Cha I (Esplin+, 2017)
J/AJ/153/188 : Spectro. of foreground population in Orion A (Fang+, 2017)
J/A+A/601/A19 : Gaia DR1 open cluster members (Gaia Collaboration+, 2017)
J/A+A/599/A14 : Taurus ultra-wide pairs (Joncour+, 2017)
J/ApJ/838/150 : The Taurus-Auriga ecosystem. I. (Kraus+, 2017)
J/AJ/153/46 : Spectroscopy of candidate members in Taurus (Luhman+, 2017)
J/AJ/153/257 : Comoving stars in Gaia DR1 (Oh+, 2017)
J/ApJ/856/23 : BANYAN. XI. The BANYAN Σ algorithm (Gagne+, 2018)
J/ApJ/859/33 : GOBELINS. IV. VLBA obs. of Taurus (Galli+, 2018)
J/AJ/156/271 : The stellar membership of the Taurus SFR (Luhman, 2018)
J/A+A/624/L11 : Coma Berenices neighbor moving group (Fuernkranz+, 2019)
Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- Gaia Gaia DR2 designation
(<Gaia DR2 NNNNNNNNNNNNNNNNNNN> in Simbad)
21- 40 A20 --- OName Other name
42- 47 F6.3 deg RAJ2000 [50.5/65] Right ascension (J2000)
49- 54 F6.3 deg DEJ2000 [2.1/19.2] Declination (J2000)
56- 61 F6.3 mas/yr pmRA [19.7/28.2] Gaia DR2 proper motion in RA
63- 69 F7.3 mas/yr pmDE [-28/-12] Gaia DR2 proper motion in DEC
71- 77 F7.3 pc Dist [119/201] Heliocentric distance
79- 85 F7.3 km/s RV [-36/43]? Gaia DR2 radial velocity
87- 93 A7 --- SpType ? MK spectral type
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History:
From electronic version of the journal
(End) Prepared by Coralie Fix [CDS], 27-Apr-2020