J/AJ/163/275 Theia 456; a stellar stream in the Milky Way disk (Andrews+, 2022)
A Young, Low-density Stellar Stream in the Milky Way Disk; Theia 456.
Andrews J.J., Curtis J.L., Chaname J., Agueros M.A., Schuler S.C.,
Kounkel M., Covey K.R.
<Astron. J., 163, 275 (2022)>
=2022AJ....163..275A 2022AJ....163..275A
ADC_Keywords: Clusters, open; Star Forming Region; Parallaxes, trigonometric;
Proper motions; Radial velocities; Photometry, G band;
Abundances, [Fe/H]; Effective temperatures; Milky Way
Keywords: Star clusters ; Stellar streams ; Stellar abundances ; Stellar
rotation ; Star formation
Abstract:
Our view of the variety of stellar structures pervading the local
Milky Way has been transformed by the application of clustering
algorithms to the Gaia catalog. In particular, several stellar streams
have been recently discovered that are comprised of hundreds to
thousands of stars and span several hundred parsecs. We analyze one
such structure, Theia 456, a low-density stellar stream extending
nearly 200pc and 20° across the sky. By supplementing Gaia
astrometric data with spectroscopic metallicities from Large Sky Area
Multi-Object Fiber Spectroscopic Telescope and photometric rotation
periods from the Zwicky Transient Facility and the Transiting
Exoplanet Survey Satellite, we establish Theia 456's radial velocity
coherence, and we find strong evidence that members of Theia 456 have
a common age (∼175Myr), common dynamical origin, and formed from
chemically homogeneous prestellar material ([Fe/H]=-0.07dex). Unlike
well-known stellar streams in the Milky Way, which are in its halo,
Theia 456 is firmly part of the thin disk. If our conclusions about
Theia 456 can be applied to even a small fraction of the remaining
∼8300 independent structures in the Theia catalog, such low- density
stellar streams may be ubiquitous. We comment on the implications this
has for the nature of star formation throughout the Galaxy.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 188 362 Theia 456 catalog
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
V/146 : LAMOST DR1 catalogs (Luo+, 2015)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)
J/AJ/152/113 : Pleiades members with K2 light curves I Periods (Rebull+, 2016)
J/AJ/152/115 : Pleiades members with K2 light curves. III. (Stauffer+, 2016)
J/MNRAS/473/5393 : Wide binaries in Tycho-Gaia (Andrews+, 2018)
J/AJ/158/77 : Candidates & members of Pisces-Eridanus stream (Curtis+, 2019)
J/ApJ/879/100 : K2 rotation periods Hyades & Praesepe members (Douglas+, 2019)
J/AJ/158/122 : Structure & star formation history of the MW (Kounkel+, 2019)
J/A+A/622/L13 : Stellar stream in Gaia DR2 discovery (Meingast+, 2019)
J/A+A/635/A45 : 570 new open clusters in Galactic disc (Castro-Ginard+, 2020)
J/ApJ/904/140 : Ruprecht 147 members & rot. data 5 other cl. (Curtis+, 2020)
J/MNRAS/496/2422 : Abundances 42 Pisces-Eridanus stream stars (Hawkins+, 2020)
J/AJ/160/279 : Untangling the Galaxy II Structure within 3kpc (Kounkel+, 2020)
J/A+A/639/A64 : Extended Meingast 1 source catalogue (Ratzenboeck+, 2020)
J/A+A/638/A9 : A census of the near-by Psc-Eri stellar stream (Roeser+, 2020)
J/ApJ/904/196 : Stellar parameters of a Young Stellar Snake (Tian, 2020)
J/AJ/159/166 : Membership & properties moving groups with Gaia (Ujjwal+, 2020)
J/A+A/649/A3 : Gaia Early Data Release 3 photometric passbands (Riello+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- Gaia Gaia EDR3 identifier
21- 31 F11.8 deg RAdeg [65/88] Right Ascension, Gaia EDR3
(ICRS at Epoch=2016.0)
33- 43 F11.8 deg DEdeg [37/56] Declination, Gaia EDR3
(ICRS at Epoch=2016.0)
45- 49 F5.3 mas plx [1.47/2.23] Gaia EDR3 parallax
51- 55 F5.3 mas e_plx [0.01/0.2] Uncertainty in plx
57- 62 F6.3 mas/yr pmRA [-5.34/-3.25] Gaia EDR3 proper motion RA
64- 68 F5.3 mas/yr e_pmRA [0.01/0.3] Uncertainty in pmRA
70- 75 F6.3 mas/yr pmDE [-2.09/-0.39] Gaia EDR3 proper motion DE
77- 81 F5.3 mas/yr e_pmDE [0.009/0.2] Uncertainty in pmDE
83- 87 F5.2 mag gmag [8.4/18.4] mean g-band Gaia EDR3 magnitude
89- 93 F5.2 mag BPmag [8.42/19.9]? mean BP-band Gaia EDR3 mag
95- 99 F5.2 mag RPmag [8.31/17.2]? mean RP-band Gaia EDR3 mag
101-106 F6.2 km/s RVel-DR2 [-24/-0.16]?=0.00 Gaia DR2 radial velocity
108-112 F5.2 km/s e_RVel-DR2 [1/15]?=0.00 Uncertainty in RVel-DR2
114-117 F4.2 mag Ag [0.21/1.55] Derived Gaia g-band extinction
119-122 F4.2 mag Abp [0.2/1.85] Derived Gaia BP-band extinction
124-127 F4.2 mag Arp [0.12/1.13] Derived RP-band extinction
129-132 F4.2 d Prot-TESS [0.36/9]?=0.00 Rotational period, TESS
134-139 F6.2 d Prot-ZTF [0.36/183]?=0.00 Rotational period, ZTF
141-145 F5.2 d Prot-final [0.36/11.2]?=0.00 Final Rotational period
147-150 I4 K Teff-lamost [3903/8333]?=0 LAMOST Effective
temperature
152-154 I3 K e_Teff-lamost [10/247]?=0 LAMOST Uncertainty in
Teff-lamost
156-159 F4.2 [cm/s2] logg-lamost [2.29/4.85]?=0.00 LAMOST Surface gravity,
log
161-164 F4.2 [cm/s2] e_logg-lamost [0.02/0.4]?=0.00 LAMOST Uncertainty in
logg-lamost
166-171 F6.2 km/s RVel-lamost [-43.4/24.9]?=0.00 LAMOST Radial Velocity
173-177 F5.2 km/s e_RVel-lamost [3/14]?=0.00 LAMOST Uncertainty in
RVel-lamost
179-183 F5.2 [-] FeH-lamost [-0.65/0.12]?=0.00 LAMOST Metallicity
185-188 F4.2 [-] e_FeH-lamost [0.01/0.3]?=0.00 LAMOST Uncertaintyin
FeH-lamost
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 03-Oct-2022