J/ApJ/872/95 GALEX and Gaia data for APOGEE red clump stars (Mohammed+, 2019)
An ultraviolet-optical color-metallicity relation for red clump stars using
GALEX and Gaia.
Mohammed S., Schiminovich D., Hawkins K., Johnson B., Wang D., Hogg D.W.
<Astrophys. J., 872, 95 (2019)>
=2019ApJ...872...95M 2019ApJ...872...95M
ADC_Keywords: Photometry, ultraviolet; Optical; Reddening; Abundances, [Fe/H];
Surveys; Spectra, infrared
Keywords: catalogs ; Galaxy: general ; stars: evolution ; ultraviolet: stars
Abstract:
Although core helium-burning red clump (RC) stars are faint at
ultraviolet wavelengths, their ultraviolet (UV)-optical color is a
unique and accessible probe of their physical properties. Using data
from the Galaxy Evolution Explorer All Sky Imaging Survey (GALEX AIS),
Gaia Data Release 2, and the Sloan Digital Sky Survey Apache Point
Observatory Galactic Evolution Experiment (APOGEE) DR14 survey, we
find that spectroscopic metallicity is strongly correlated with the
location of an RC star in the UV-optical color-magnitude diagram. The
RC has a wide spread in (NUV-G)0 color of over 4mag compared to a
0.7mag range in (GBP-GRP)0. We propose a photometric,
dust-corrected, UV-optical (NUV-G)0 color-metallicity [Fe/H]
relation using a sample of 5175 RC stars from APOGEE. We show that
this relation has a scatter of 0.16dex and is easier to obtain for
large, wide-field samples than for spectroscopic metallicities.
Importantly, the effect may be comparable to the spread in RC color
attributed to extinction in other studies.
Description:
We build a sample of 5175 red clump (RC) stars from
Ting+ (2018, J/ApJ/858/L7), which is constructed using data from the
APOGEE (Majewski+ 2017AJ....154...94M 2017AJ....154...94M) and Large Sky Area Multi-Object
Fibre Spectroscopic Telescope (LAMOST, Xiang+ 2017MNRAS.467.1890X 2017MNRAS.467.1890X)
surveys. For our analysis, we only used the pristine RC sample
obtained from APOGEE DR14 infrared (1.51-1.70um) spectra.
We combined near-ultraviolet (NUV)-band data from the Galaxy Evolution
Explorer (GALEX) All Sky Imaging Survey (GAIS;
Martin+ 2005ApJ...619L...1M 2005ApJ...619L...1M) with Gaia DR2 (I/345) to our RC stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 103 5175 Catalog-matched red clump (RC) star sample
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See also:
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
II/335 : Revised cat. of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)
III/284 : APOGEE-2 data from DR16 (Majewski+, 2017)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
V/164 : LAMOST DR5 catalogs (Luo+, 2019)
J/AJ/120/1808 : Stroemgren photometry in LMC disk (Cole+, 2000)
J/AJ/121/327 : Abundances of Red Clump Stars in NGC6819 (Bragaglia+, 2001)
J/other/KFNT/23.102 : Candidate Red Clump stars in the Tycho-2 (Rybka+, 2007)
J/A+A/523/A48 : Gaia photometry (Jordi+, 2010)
J/A+A/527/A40 : Faint high-Galactic-lat. red clump stars (Saguner+, 2011)
J/AJ/141/90 : SEGUE stellar parameter pipeline. V. (Lee+, 2011)
J/MNRAS/419/1637 : Nearby red clump stars JHK observations (Laney+, 2012)
J/MNRAS/421/3362 : Kinematics of galactic red clump stars (Bilir+, 2012)
J/A+A/555/A91 : Kinematics of bulge red clump stars (Vasquez+, 2013)
J/AJ/151/144 : ASPCAP weights for APOGEE chemical elements (Garcia+, 2016)
J/MNRAS/469/4718 : Kepler red-clump stars in NGC6819 & NGC6791 (Bossini+, 2017)
J/A+A/616/A10 : 46 open clusters GaiaDR2 HR diag. (Gaia Collaboration, 2018)
J/A+A/609/A116 : Low extinction TGAS HR Catalogue (Ruiz-Dern+, 2018)
J/ApJ/858/L7 : Red clump stars selected from LAMOST & APOGEE (Ting+, 2018)
J/MNRAS/495/3087 : Photometry of 2.6million red clump stars (Lucey+, 2020)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 F8.4 deg RAdeg Gaia Barycentric Right Ascension (ICRS)
at Ep=2015.5
10- 17 F8.4 deg DEdeg [-31.4/85] Gaia Barycentric Declination
(ICRS) at Ep=2015.5
19- 23 F5.2 mag NUVmag [11.7/22.4] GALEX NUV magnitude
25- 28 F4.2 mag e_NUVmag [0/0.4] Uncertainty in NUVmag
30- 34 F5.2 mag (NUV-G)0 [3.3/10.6] Dust corrected GALEX NUV-Gaia G
band color index
36- 39 F4.2 mag e_(NUV-G)0 [0/0.4]? Uncertainty in (NUV-G)0
41- 45 F5.2 mag BPmag [5/14.7] Gaia BP integrated magnitude
47- 50 F4.2 mag e_BPmag [0/0.05] Uncertainty in BPmag
52- 55 F4.2 mag (BP-RP)0 [0.5/2.1] Dust corrected Gaia BP-RP
color index
57- 60 F4.2 mag e_(BP-RP)0 [0/0.06] Uncertainty in (BP-RP)0
62- 65 F4.2 mag E(B-V) [0/0.9] Reddening
from Green+ (2015ApJ...810...25G 2015ApJ...810...25G)
67- 71 F5.2 mag DM [4.15/12.72] Distance modulus
73- 77 F5.2 [-] [Fe/H] [-1.14/0.5] Stellar metallicity
79- 82 F4.2 [-] e_[Fe/H] [0.01] Uncertainty in [Fe/H]
84- 90 F7.2 K Teff [4472/5193] Effective temperature
from APOGEE (1)
92- 96 F5.2 [-] [a/Fe] [-0.07/0.4] α abundance
98-103 F6.2 [-] e_[a/Fe] [-0.7/273] Uncertainty in [a/Fe]
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Note (1): The APOGEE effective temperatures have an uncertainty of ±91.47K
for all values.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 04-Aug-2020