J/ApJ/944/88 Phot. metallicity & distances for Gaia RR Lyrae stars (Li+, 2023)
Photometric metallicity and distance estimates for ∼136000 RR Lyrae stars
from Gaia Data Release 3.
Li X.-Y., Huang Y., Liu G.-C., Beers T.C., Zhang H.-W.
<Astrophys. J., 944, 88 (2023)>
=2023ApJ...944...88L 2023ApJ...944...88L
ADC_Keywords: Stars, variable; Stars, distances; Abundances; Photometry;
Optical; Magnitudes, absolute
Keywords: RR Lyrae variable stars ; Distance indicators ; Metallicity ;
Magellanic Clouds
Abstract:
We present a sample of 135,873 RR Lyrae stars (RRLs) with precise
photometric metallicity and distance estimates from our newly
calibrated P-Φ31-R21-[Fe/H]/P-R21-[Fe/H] and G-band absolute
magnitude-metallicity relations. The P-Φ31-R21-[Fe/H] and
P-R21-[Fe/H] relations for type RRab and type RRc stars are obtained
from nearly 2700 Gaia-identified RRLs, with precise Φ31 and
R21 measurements from light curves and metallicity estimates from
spectroscopy. Using a few hundreds of nearby RRLs, with accurate
distances estimated from the parallax measurements in Gaia Early Data
Release 3, new G-band absolute magnitude-metallicity relations and
near-IR period-absolute magnitude-metallicity relations are
constructed. External checks, using other high-resolution
spectroscopic samples of field RRLs and RRL members of globular
clusters, show that the typical uncertainties in our photometric
metallicity estimates are about 0.24 and 0.16dex for type RRab and
type RRc stars, respectively, without significant systematic bias with
respect to the high-resolution spectroscopic metallicity measurements.
The accuracies of these metallicity estimates are much improved,
especially for type RRab stars, when compared to those provided by
Gaia Data Release 3. Validations of our distance estimates, again
using members of globular clusters, show that the typical distance
errors are only 3%-4%. The distance moduli
µ0=18.503±0.001(stat)±0.040(syst)mag for the Large Magellanic
Cloud (LMC) and µ0=19.030±0.003(stat)±0.043(syst)mag for the
Small Magellanic Cloud (SMC) are estimated from our type RRab star
sample and are in excellent agreement with previous measurements. The
mean metallicities of the LMC and SMC derived in this work are also
consistent with previous determinations. Using our sample, a steep
metallicity gradient of -0.024±0.001dex/kpc is found for the LMC,
while a negligible metallicity gradient is obtained for the SMC.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table5.dat 99 135873 Final sample
--------------------------------------------------------------------------------
See also:
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
J/ApJ/412/183 : RR Lyr in M68 (Clement+, 1993)
J/AJ/108/1016 : Kinematics of local RR lyrae stars. I. (Layden, 1994)
J/A+A/312/111 : [Fe/H] from RR Lyrae light curves (Jurcsik+, 1996)
J/MNRAS/384/1583 : JHK light curves of RR Lyr (Sollima+, 2008)
J/AJ/138/517 : CaII spectroscopy of SMC red giants (Parisi+, 2009)
J/AJ/137/4377 : List of SEGUE plate pairs (Yanny+, 2009)
J/ApJS/197/29 : Chemical compositions of 11 RR Lyrae (For+, 2011)
J/MNRAS/422/2116 : BHB and RR Lyrae towards Anticentre and NGP (Kinman+, 2012)
J/ApJ/763/32 : Galactic halo RRab stars from CSS (Drake+, 2013)
J/ApJ/765/154 : RR Lyrae stars in the Catalina Sky Survey (Drake+, 2013)
J/MNRAS/439/3765 : RR Lyrae in 15 Galactic globular clusters (Dambis+, 2014)
J/ApJS/213/9 : Catalina Surveys periodic variable stars (Drake+, 2014)
J/ApJ/782/59 : Abund. of 8 RR Lyrae subclass C var. stars (Govea+, 2014)
J/ApJ/783/130 : Parallaxes of high mass star forming regions (Reid+, 2014)
J/ApJ/807/127 : 70 RR Lyrae stars in the LMC bar (Muraveva+, 2015)
J/MNRAS/447/2404 : Equivalent width of 21 RR Lyrae stars (Pancino+, 2015)
J/ApJ/816/49 : Spitzer/IRAC observations of SMC Cepheids (Scowcroft+, 2016)
J/ApJ/838/107 : Distances to RRab stars from WISE and Gaia (Sesar+, 2017)
J/AJ/153/204 : RR Lyrae stars from the PS1 3π survey (Sesar+, 2017)
J/MNRAS/481/1195 : GaiaDR2 RR Lyrae stars as standard candles (Muraveva+, 2018)
J/MNRAS/480/1229 : Blazhko effect in the first overtone RRLyrae (Netzel+, 2018)
J/MNRAS/482/5138 : Gal. GC mean proper motions & velocities (Baumgardt+, 2019)
J/A+A/622/A60 : Gaia DR2 misclassified RR Lyrae list (Clementini+, 2019)
J/AcA/69/321 : OGLE RR Lyrae stars in Gal. bulge & disk (Soszynski+, 2019)
J/ApJ/904/13 : Radial velocity for 10 giant EBs (Graczyk+, 2020)
J/ApJS/247/68 : Probing the Gal. halo with RR Lyrae stars. I. (Liu+, 2020)
J/ApJ/908/20 : Field RR Lyrae as galactic probes. II. (Crestani+, 2021)
J/ApJ/920/33 : Fe/H estimation of 104 RR Lyrae from I- LC (Dekany+, 2021)
J/MNRAS/502/4074 : Period-luminosity-metallicities of RRLs (Muhie+, 2021)
J/ApJ/912/144 : Metallicity of Gal. RR Lyrae from LCs (Mullen+, 2021)
J/ApJS/252/23 : Reddening map of MCs from OGLE-IV RC stars (Skowron+, 2021)
J/MNRAS/505/5978 : Gaia EDR3 view on Gal. globular clusters (Vasiliev+, 2021)
J/ApJS/261/33 : Phot. metallicity prediction of RR Lyrae (Dekany+, 2022)
J/ApJ/931/131 : Metallicity of Gal. RRLyrae from LCs. II. (Mullen+, 2022)
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 I19 --- GaiaDR3 Unique source identifier for Gaia DR3
21- 31 F11.7 deg RAdeg Right ascension from Gaia DR3 (ICRS) at
Epoch=2016
33- 43 F11.7 deg DEdeg [-90/89] Declination from Gaia DR3 (ICRS) at
Epoch=2016
45- 50 F6.2 [-] [Fe/H] [-10.6/5.2] Photometric metallicity
52- 55 F4.2 [-] e_[Fe/H] [0.19/6.3] Uncertainty of photometric
metallicity
57- 61 F5.2 mag GMag [-2.5/3] G-band absolute magnitude
63- 66 F4.2 mag e_GMag [0.09/2.3] Uncertainty of GMag
68- 74 F7.2 mag EBV [0/1338.4] Adopted value of E (B-V)
76- 80 A5 --- r_EBV Flag to indicate the source of E (B-V) (1)
82- 87 F6.2 kpc Dist-Phot [0/146] Photometric distance
89- 94 F6.2 kpc e_Dist-Phot [0/125] Uncertainty of Distance
96- 99 A4 --- Type Type of RR Lyrae star, "RRab" or "RRc"
--------------------------------------------------------------------------------
Note (1): Sources for E(B-V) as follows:
sfd98 = Schlegel et al. 1998ApJ...500..525S 1998ApJ...500..525S
c22 = Clementini et al. 2023, J/A+A/674/A18
s21 = Skowron et al. 2021, J/ApJS/252/23
h10 = Harris 2010arXiv1012.3224H 2010arXiv1012.3224H
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 28-Jan-2025