J/MNRAS/481/3244 Chemo-kinematics from MARVELS (Grieves+, 2018)
Chemo-kinematics of the Milky Way from the SDSS-III MARVELS survey.
Grieves N., Ge J., Thomas N., Willis K., Ma B
<Mon. Not. R. Astron. Soc. 481, 3244-3265 (2018)>
=2018MNRAS.481.3244G 2018MNRAS.481.3244G (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Milky Way ; Radial velocities ; Space velocities ;
Effective temperatures ; Abundances, [Fe/H] ; Stars, diameters ;
Stars, distances ; Stars, ages
Keywords: techniques: radial velocities - techniques: spectroscopic - surveys -
stars: fundamental parameters - stars: kinematics and dynamics -
Galaxy: kinematics and dynamics
Abstract:
Combining stellar atmospheric parameters, such as effective
temperature, surface gravity, and metallicity, with barycentric radial
velocity data provides insight into the chemo-dynamics of the Milky
Way and our local Galactic environment. We analyse 3075 stars with
spectroscopic data from the Sloan Digital Sky Survey III MARVELS
radial velocity survey and present atmospheric parameters for 2343
dwarf stars using the spectral indices method, a modified version of
the equivalent width method. We present barycentric radial velocities
for a sample of 2610 stars with a median uncertainty of 0.3km/s. We
determine stellar ages using two independent methods and calculate
ages for 2335 stars with a maximum-likelihood isochronal age-dating
method and for 2194 stars with a Bayesian age-dating method. Using
previously published parallax data, we compute Galactic orbits and
space velocities for 2504 stars to explore stellar populations based
on kinematic and age parameters. This study combines good ages and
exquisite velocities to explore local chemo-kinematics of the Milky
Way, which complements many of the recent studies of giant stars with
the APOGEE survey, and we find our results to be in agreement with
current chemo-dynamical models of the Milky Way. Particularly, we find
from our metallicity distributions and velocity-age relations of a
kinematically defined thin disc that the metal-rich end has stars of
all ages, even after we clean the sample of highly eccentric stars,
suggesting that radial migration plays a key role in the metallicity
scatter of the thin disc. All stellar parameters and kinematic data
derived in this work are catalogued and published online in
machine-readable form.
Description:
The MARVELS catalogue is based on spectroscopic measurements from
MARVELS in the SDSS-III Survey in 2008-2012. For full description of
the data see the paper.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
marvels.dat 605 3075 MARVELS catalogue
marvels.fits 2880 677 Fits version of MARVELS catalogue
--------------------------------------------------------------------------------
See also:
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
IX/49 : XXL Survey: First results (Pierre+, 2016)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
Byte-by-byte Description of file: marvels.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 23 A23 --- Name Main name of star
25- 47 A23 --- 2MASS 2MASS survey ID
49- 62 A14 --- Plate MARVELS SDSS-III plate name (1)
64- 69 A6 --- Beam MARVELS beam number (2)
71- 79 F9.5 deg RAdeg Right ascension (J2000)
81- 89 F9.5 deg DEdeg Declination (J2000)
91- 96 F6.3 mag Vmag ?=- Guide Star Catalogue 2.3 V magnitude
98-102 F5.3 mag e_Vmag ?=- Guide Star Catalogue 2.3 V magnitude
error
104-108 A5 --- Evol [dwarf/giant ] Evolutionary state
110-111 I2 --- Nobs Number of spectral observations for the star
113-118 F6.1 K Teff ?=- Effective temperature
120-124 F5.1 K e_Teff ?=- Effective temperature error
126-130 F5.2 [Sun] [Fe/H] ? Metallicity [Fe/H],
log10(iron abundance compared to Sun)
132-135 F4.2 [Sun] e_[Fe/H] ? Metallicity error
137-140 F4.2 [cm/s2] logg ? Surface gravity log10(gravity in cgs units)
142-145 F4.2 [cm/s2] e_logg ? Surface gravity error
147-150 F4.2 Msun Mass ? Stellar mass
152-155 F4.2 Msun e_Mass ? Stellar mass error
157-160 F4.2 Rsun Radius ? Stellar radius
162-165 F4.2 Rsun e_Radius ? Stellar radius error
167-169 A3 --- SpClass Spectral classification
171-175 F5.2 Gyr AgeSH ? Stellar age from StarHorse
177-180 F4.2 Gyr e_AgeSH ? Stellar age error from StarHorse
182-186 F5.2 Gyr P05AgeSH ? 5% PDF age percentile from StarHorse
188-192 F5.2 Gyr P16AgeSH ? 16% PDF age percentile from StarHorse
194-198 F5.2 Gyr P50AgeSH ? 50% PDF age percentile from StarHorse
200-204 F5.2 Gyr P84AgeSH ? 84% PDF age percentile from StarHorse
206-210 F5.2 Gyr P95AgeSH ? 95% PDF age percentile from StarHorse
212-220 F9.6 --- ExtSH ? Interstellar extinction from StarHorse
222-229 F8.6 --- e_ExtSH ? Interstellar extinction error from
StarHorse
231-236 F6.4 kpc DistSH ? Distance from StarHorse
238-243 F6.4 kpc e_DistSH ? Distance error from StarHorse
245-249 F5.2 Gyr AgeIso ? Age from isochrone method
251-254 F4.2 Gyr e_AgeIso ? Age error from isochrone method
256-260 F5.2 Gyr P05AgeIso ? 5% PDF age percentile from
isochrone method
262-266 F5.2 Gyr P16AgeIso ? 16% PDF age percentile from
isochrone method
268-272 F5.2 Gyr P50AgeIso ? 50% PDF age percentile from
isochrone method
274-278 F5.2 Gyr P84AgeIso ? 84% PDF age percentile from
isochrone method
280-284 F5.2 Gyr P95AgeIso ? 95% PDF Age Percentile from
isochrone method
286-293 F8.6 --- PSGIso ? Probability of sub-giant branch from
isochrone method
295-297 A3 --- EvolIso [MS-SG ] Sub-giant (SG) or main-sequence (MS)
label from isochrone method
299-306 F8.3 km/s RV ?=- Radial velocity
308-312 F5.3 km/s e_RV ?=- Radial velocity error
314-321 F8.3 km/s ULSR ?=- U Galactic space velocity related
to Local Standard of Rest
323-329 F7.3 km/s e_ULSR ?=- U-LSR error
331-338 F8.3 km/s VLSR ?=- V Galactic space velocity related
to Local Standard of Rest
340-346 F7.3 km/s e_VLSR ?=- V-LSR error
348-355 F8.3 km/s WLSR ?=- W Galactic space velocity related
to Local Standard of Rest
357-363 F7.3 km/s e_WLSR ?=- W-LSR error
365-369 A5 --- DiskPop Thin, thick or trans disk population
label (3)
371-378 A8 --- SubPop Subpopulation label
(halo, Hercules or Arcturus)
380-389 E10.4 --- ThinProb ?=- Thin disk population probability
391-400 E10.4 --- ThickProb ?=- Thick disk population probability
402-411 E10.4 --- HaloProb ?=- Halo population probability
413-422 E10.4 --- HercProb ?=- Hercules Stream population probability
424-433 F10.6 kpc XGal ?=- X value of Galactocentric cartesian
coordinates
435-443 F9.6 kpc YGal ?=- Y value of Galactocentric cartesian
coordinates
445-453 F9.6 kpc ZGal ?=- Z value of Galactocentric cartesian
coordinates
455-463 F9.6 kpc RGal ?=- Radius value of Galactocentric cartesian
coordinates
465-472 F8.3 km/s RVGal ?=- Radial Galactocentric velocity in a
cylindrical reference frame
474-480 F7.3 km/s VphiGal ?=- Rotational Galactocentric velocity in a
cylindrical reference frame
482-490 F9.6 kpc RGuide ?=- Guiding-center radius of stellar orbit
492-497 F6.3 kpc RmedGal ?=- Median Galactocentric radius from
integrated Galactic orbits
499-504 F6.3 kpc ZmaxGal ?=- Maximum vertical amplitude from
integrated Galactic orbits
506-510 F5.3 --- EccGal ?=- Orbital eccentricity from integrated
Galactic orbits
512-519 F8.5 mas plx ?=- Parallax
521-527 F7.5 mas e_plx ?=- Parallax error
529-547 A19 --- r_plx Parallax bibliographic reference
549-558 F10.5 mas/yr pmRA ?=- Proper motion in right ascension
560-566 F7.5 mas/yr e_pmRA ?=- Proper motion in right ascension error
568-577 F10.5 mas/yr pmDE ?=- Proper motion in declination
579-585 F7.5 mas/yr e_pmDE ?=- Proper motion in declination error
587-605 A19 --- r_pmRA Proper motion bibliographic reference
--------------------------------------------------------------------------------
Note (1): Stars observed with two plates will be labeled with both plates
combined with a & sign.
Note (2): Each star was observed with two beams adjacent to each other.
The odd beam of the pair is labeled here. Stars observed with two plates will
be labeled with both odd beams from each plate combined with a & sign.
Note (3): Population label as follows:
thin = thin disc (1701 dwarfs and 543 giants)
trans = stars between the thin and thick disc cut-offs
(92 dwarfs and 25 giants)
thick = thick disc (98 dwarfs and 45 giants)
--------------------------------------------------------------------------------
Acknowledgements:
Nolan Grieves, ngrieves(at)ufl.edu
(End) Nolan Grieves [Univ. of Florida], Patricia Vannier [CDS] 15-Oct-2018